CN104184420B - Power Amplifier Unit and related device and digital pre-distortion bearing calibration - Google Patents
Power Amplifier Unit and related device and digital pre-distortion bearing calibration Download PDFInfo
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- CN104184420B CN104184420B CN201410216196.8A CN201410216196A CN104184420B CN 104184420 B CN104184420 B CN 104184420B CN 201410216196 A CN201410216196 A CN 201410216196A CN 104184420 B CN104184420 B CN 104184420B
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Abstract
The present invention provides a kind of Power Amplifier Unit and related device and digital pre-distortion bearing calibration, and the Power Amplifier Unit includes one first input, for receiving together phase control signal；One second input, for receiving a Quadrature control signals；One input stage, for exporting a drive signal with phase control signal and the Quadrature control signals based on this at least partly received；And an output stage, for receiving the drive signal that the input stage exported from an input, and an output signal of the Power Amplifier Unit is produced to respond the reception drive signal.By the present invention, because the cut in trimming process can reduce the code word number allowed, therefore trimming process can be simplified.
Description
Technical field
Disclosed herein embodiment be to be relevant to Power Amplifier Unit, power amplifier module, communication unit, penetrate
Frequency transmitter architecture and the method that digital pre-distortion correction is performed in a radio architectures.
Background technology
With the continuous progress of deep-submicron CMOS (complementary metal oxide semiconductor) technique, digital circuit becomes smaller
And more power saving.However, deep-submicron CMOS process is not especially effective to the size for changing analog circuit.Therefore, a lot
In equipment (such as radio frequency (RF)) transmitter, in order to obtain more benefits for using deep-submicron CMOS process, it is always desirable to
(such as under assistance of digital signal processing algorithm) analog element or analog circuit can be removed as much as possible.
In addition, many traditional radiofrequency launchers use linear power amplifier (PA).Due to linear power amplifier
Efficiency is generally relatively low, causes the efficiency of the radiofrequency launcher of this quasi-tradition relatively low.Therefore, with the switching molding with greater efficiency
Formula power amplifier is compared, and traditional linear power amplifier is substituted using switch-mode power amplifier in radiofrequency launcher
It is more attractive.
Accordingly, it is desirable to provide a kind of radiofrequency launcher, it can utilize switching mode by the assistance of digital processing algorithm
Power amplifier, come the efficiency for reducing the size of power amplifier and improving power amplifier.However, switch-mode-power is put
Big device typically exhibits the input/output relation of nonlinearity, and generally requires to use noise shaping techniques, each to meet
Kind wireless standard and the strict demand deposited.
For digital pole transmitter using a kind of existing transmitter design of switch-mode power amplifier, it can draw deep Asia
The advantage of micrometre CMOS process technology.Therefore, this digital pole transmitter can realize high efficiency, while only need one small
Silicon area.However, it is with the problem of these existing transmitter designs, due to AM (amplitude modulation(PAM)) and PM (phase-modulation)
Signal bandwidth expansion characteristics intrinsic in the transmitter of pole, they are only applicable to narrow-band modulated.
Advantage of the transmitter design in pole using two-dimentional (inphase/orthogonal) modulation is mixed, so as to realize wideband phase modulation.So
And a problem of this mixing polar transmitter is that they are adversely affected by amplitude and phase quantisation noise, therefore need
Want effective noise shaping.
In addition, it is based on inphase/orthogonal (In-phase/Quadrature, abbreviation I/Q) RF digital-analog converter
The transmitter of (Digital-Analog converter, abbreviation DAC) is also existing.When I/Q radio frequencies DAC output is by group
Close when simulating (radio frequency) domain, the I/Q radio frequencies DAC combines DAC function and the function phase of frequency mixer.However, this transmitting
Device design needs a linear power amplifier, and is set the effect of direct (direct) I/Q radio frequency DAC than digital pole transmitter
Meter is lower.
Another existing radiofrequency launcher (mainly arrowband) design uses self-adapted pre-distortion, the self-adapted pre-distortion
Increment summation (delta-sigma) modulator is used, to realize the automatic inverse function of non-linearity of power amplifier.Such design phase
To simple and can be supplied to the DAC of low precision and use.However, this design still includes generally conventional framework so that power amplification
The efficiency of device is still relatively low.
It is expected that will be more and more to the demand of the radiofrequency launcher of digital assistant/digital Dense.However, digital algorithm
Limited to by circuit speed availability, therefore, from the perspective of it can be achieved, find simple and effective digital algorithm be to
Close important.It is currently available that in published document, discusses sometimes in high clock frequency (four times of such as carrier frequency)
The digital algorithm of operation.However, this clock frequency is to realize in the CMOS and/or user's communication unit of reality
's.
Therefore, this field needs a kind of novel radiofrequency launcher framework and related operating method badly to solve above-mentioned ask
Topic.
The content of the invention
The present invention provides a kind of Power Amplifier Unit and related device and digital pre-distortion bearing calibration, it is intended to subtracts
Light or elimination above mentioned problem.
According to the first embodiment of the present invention, a kind of Power Amplifier Unit is proposed, is included：One first input, is used for
Receive together phase control signal；One second input, for receiving a Quadrature control signals；One input stage, for based at least portion
This point received exports a drive signal with phase control signal and the Quadrature control signals；And an output stage, it is used for
The drive signal for receiving the input stage and being exported is inputted from one, and produces an output signal of the Power Amplifier Unit with sound
Drive signal should be received.
Consequently, it is possible to which this Power Amplifier Unit can share between phase and Quadrature control signals, and then realize
One single array power amplifier unit is to substitute in existing digital power amplifier topology design two separated same phases and just
Hand over array.Therefore the area that can be significantly decreased when power amplifier is realized on chip.
According to an alternative embodiment, the input stage includes：
Together mutually sub- level, includes an input and an output, and the input is used for receiving representing this with phase control signal
One input signal, the output are coupled to the input of the output stage, and this is used for driving the electric current at its output with mutually sub- level
To respond the logic state with phase control signal；And
One positive jiao zi level, includes an input and an output, and the input is used for receiving representing the Quadrature control signals
One input signal, the output are coupled to the input of the output stage, and the positive jiao zi level is used for driving the electric current at its output
To respond a logic state of the Quadrature control signals.
According to an alternative embodiment, the output stage can be used to produce the output signal of the Power Amplifier Unit to respond
The one of its input merges electric current.
According to an alternative embodiment, the input stage can include an at least OR gate, for receiving being somebody's turn to do in one first input
With phase control signal and one second input in the Quadrature control signals, and the input stage be used for export a current signal with
Respond the logic state that the OR gate is exported.
According to an alternative embodiment, the input stage and the output stage can include one and repeatedly connect transistor topology structure.
According to an alternative embodiment, the input stage can include a pair of and change binding structure.
According to an alternative embodiment, the input stage can be used to based at least partly this with phase control signal and the orthogonal control
Signal processed exports a Differential Driving signal；And the output stage can be used to receive what the input stage in a differential input was exported
The Differential Driving signal, reception Differential Driving letter is responded to produce a differential output signal of the Power Amplifier Unit
Number.
According to an alternative embodiment, the Power Amplifier Unit includes a switch mode power cell.
According to the second embodiment of the present invention, a kind of power amplifier module is proposed, includes multiple work(as described above
Rate amplifier unit.
According to an alternative embodiment, this kind of power amplifier module is used for controlling this with a complementary control word coordination mechanism
A little Power Amplifier Unit, wherein together each in phase control word is all paired with the paratope in an orthogonal control word.
According to a third embodiment of the invention it is proposed a kind of communication unit, includes power amplifier mould as described above
Block.
According to the fourth embodiment of the present invention, a kind of radiofrequency launcher framework is proposed, is included at least at a data signal
Reason module to operate in an emission mode, wherein this at least a digital signal processing module is used for：Receive numeral input letter
Number；From a cut section of digital power amplifier controlling value a digital work(is selected based at least partly institute's digital input signals
Rate amplifier controlling value；And the selected cut digital power amplifier controlling value that the reception digital input signals will be represented
Export to an at least power amplifier module as described above.
According to an alternative embodiment, the cut section of this kind of digital power amplifier controlling value can be used to avoid according to a complementation
The same phase of control word coordination mechanism and orthogonal overlapping.
According to an alternative embodiment, at least one code word being allowed to can be mapped to by the code word for being intended to forbid should come cut
The cut section of kind digital power amplifier controlling value.
According to an alternative embodiment, an at least digital signal processing module is operated in one training/correction mode, wherein should
At least a digital signal processing module is used for：
Receive a digital training signal；
The digital power amplifier controlling value for representing the digital training signal received is exported to an at least power
Amplifier module；
A feedback signal is received from an output of an at least digital power amplifier module；And
The cut section of the digital power amplifier controlling value is corrected, protects the digital power amplifier controlling value
Hold in the range of cut limitation to avoid according to the same phase of a complementary control word coordination mechanism and orthogonal overlapping.
According to the fifth embodiment of the present invention, a kind of side that digital pre-distortion correction is performed in a radio architectures is proposed
Method, include：Receive a digital training signal；The digital power amplifier for representing the digital training signal received is controlled
Value is exported to an at least power amplifier module；A feedback is received from an output of an at least digital power amplifier module
Signal；And the cut section of the digital power amplifier controlling value is corrected, make the digital power amplifier controlling value
It is maintained in the range of cut limitation to avoid according to the same phase of a complementary control word coordination mechanism and orthogonal overlapping.
The embodiment of above-mentioned and other aspect for the present invention will be described in detail in the following description.
One of the advantages of the present invention can reduce the code word number allowed in the cut in trimming process, therefore can simplify correction
Process.
Brief description of the drawings
Fig. 1 is the partial functional block diagram for the electronic equipment that one embodiment of the invention provides；
Fig. 2 is the rough schematic view of the radiofrequency launcher of Fig. 1 electronic equipment；
Fig. 3 is the rough schematic view of the digital signal processing module of Fig. 2 radiofrequency launcher；
Fig. 4 is the rough schematic view for the radiofrequency launcher that another embodiment of the present invention provides；
Fig. 5 is the functional block diagram of the power amplifier module of Fig. 2 and/or Fig. 4 radiofrequency launcher；
Fig. 6 is one embodiment of the invention offer for producing radio frequency analog radiofrequency signal with the side that radio frequency interface transmits
The simplified flowchart of method；
Fig. 7 is the simplification circuit diagram of another Power Amplifier Unit；
Fig. 8 is the schematic diagram of a simplification mac function of a Power Amplifier Unit group of Power Amplifier Unit；
Fig. 9 is the example of a control word coordination mechanism；
Figure 10 is and the simplification circuit diagram of another Power Amplifier Unit；
Figure 11 is the example of type of two-dimension codeword configuration aspect after a cut；
Figure 12 is the example of the output voltage configuration aspect of type of two-dimension codeword configuration aspect after a cut；
Figure 13 is a simplification block diagram of the example that a predistortion correction is implemented；
Figure 14 is the implementation example of the cut Two dimensional control character value；
Figure 15 is to perform the simplified partial flow chart of the digital pre-distortion of signal for being launched in radio frequency interface；
Figure 16 is to perform another part simple flow of the digital pre-distortion of signal for being launched in radio frequency interface
Figure；
Figure 17 is the simplification block diagram of another implementation example of predistortion correction.
Reference
100 electronic equipments
102 antennas
104 duplexers
106 receiver chains
107 transmitter chains
108 signal processing logic units
110 user interfaces
116 memory cells
118 timers
130 oscillators
200 radiofrequency launchers
210th, 410 digital signal processing module
212nd, 214 digital control character
222nd, 224 input signal
230 power amplifier modules
231 output ports
Sampling/filter element on 240
242nd, on 244 sampling with mutually and quadrature component
250 digital pre-distortion elements
310 clock pulse signals
350 predistortions configure aspect
400 radiofrequency launchers
420 noise shaping elements
442nd, 444 input signal component
450 increment summation modulators
510 first switch mode power amplifier unit groups
512nd, 514 amplitude control words accord with
520 second switch mode power amplifier unit groups
530 analog radio-frequency signals
532 first (same to phase) components
534 second (orthogonal) components
540 the same as phase carrier frequency signaling
545 orthogonal carrier frequencies signals
550 first (same to phase) phase selectors
552 first carrier frequency signals
554 the same as phase phase flag signal
555 second (orthogonal) phase selectors
557 second carrier frequency signalings
559 quadrature phase marking signals
560 amplitudes and marker generator module
570th, 700,1000 Power Amplifier Unit
574 current signals
575 control bits
600 flows
605~650 steps
710 input stages
712 first inputs
713rd, 715 control bit
714 second inputs
716th, 1016 drive signal
720th, 1020 output stage
722nd, 1022 input
726th, 1026 output signal
730th, 1030 the same as mutually sub- level
732nd, 742,1032,1042 output
734th, 744,1034,1044 and door
740th, 1040 positive jiao zi level
800 Power Amplifier Unit groups
1300 cut two-dimensional adaptive algorithms
1310 training signals
1320 digital power amplifier controlling values
1330 feedback signals
1340 signal outputs
1352 attenuators
1354 frequency mixers
1356 analog filters
1358 analog-digital converters
1360 data points export
1365 two-dimensional look-up tables (memory)
1400 quadrants
1410th, 1420,1430,1440 region
1710 code word cuts
Embodiment
Some vocabulary has been used among specification and claims to censure specific element.It is common in art
Technical staff is, it is to be appreciated that hardware manufacturer may call same element with different nouns.This specification and right
Claim is used as differentiation not in a manner of the difference of title is used as and distinguishes element with the difference of element functionally
Criterion.It is an open term in the "comprising" of specification in the whole text and claim mentioned in, therefore " bag should be construed to
Contain but be not limited to ".In addition, " coupling " one word is comprising any direct and indirect electrical connection herein, therefore, if literary
Described in a first device be coupled to a second device, then the second device can be directly electrically connected in by representing the first device,
Or it is electrically connected indirectly to the second device by other devices or connection means.
The present invention provides radio frequency (RF) transmitter to match with some embodiments of the present invention, and the radiofrequency launcher is used for
Wireless communication handset.So, the present invention is not limited to present embodiment, and it can also be real in other replaceable embodiments
It is existing.
Referring to Fig. 1, it is the simplification figure of electronic equipment 100 provided in an embodiment of the present invention.In the present embodiment, the electronics
Equipment 100 is a wireless communication handset.The electronic equipment 100 includes antenna 102 and many that can be coupled with the antenna 102
Common RF transceiver element or circuit.In the present embodiment, antenna 102 can be coupled to a duplexer filter or duplexer
104, to isolate a receiver chain 106 and a transmitter chain 107.In the prior art, the receiver chain 106 generally includes to penetrate
Frequency receiving circuit with provide receive, filtering and intermediate frequency (intermediate) or base-band frequency conversion function.On the contrary, the transmitter
Chain 107 generally includes radio frequency transmitter circuitry, to provide modulation and power amplification function.
From the point of view of complete, the electronic equipment 100 can also further comprise signal processing logic unit 108.The signal transacting
One of logic unit 108 output can be provided to a suitable user interface (UI) 110, and the user interface 110 can be by
Display, keyboard, microphone, loudspeaker etc. form.The signal processing logic unit 108 may also couple to one and be stored with operation
The memory cell 116 of condition (the decoding/encoding function of such as being realized by multiple technologies), for example, (volatibility) is random
Access the memory technology of memory (RAM), (non-volatile) read-only storage (ROM), flash memory or other any combination.The letter
Number processing logic unit 108 be generally coupled to a timer 118, with the operating clock in control electronics 100.
The transmitter chain 107 of this wireless communication handset includes being used for the radiating circuit for receiving input signal.In this implementation
In mode, the radiating circuit is the signal processing logic unit 108, and the input signal includes to be transmitted by RF interfaces
Information.The transmitter chain 107 is further used for output one and included the radiofrequency signal of information to be transmitted.The present embodiment
In, information to be transmitted is transferred to the antenna 102 by this via the duplexer.In this way, transmitter chain 107 usually requires
The operations such as row digital-to-analogue conversion, mixing, noise shaping and input signal amplification, to produce radiofrequency signal output.
Referring to Fig. 2, it is the radiofrequency launcher 200 of one embodiment of the invention.In the present embodiment, the radiofrequency launcher
200 can be used in the transmitter chain 107 shown in Fig. 1.Radiofrequency launcher 200 shown in Fig. 2 includes a Digital Signal Processing mould
Block 210, for receiving the input signal of one or more complexity, the complicated input signal includes that a radio frequency interface will be passed through
The information that (for example, Fig. 1 antenna 102) is transmitted.In the present embodiment, the digital signal processing module 210 is used to receive
The input letter of I/Q (inphase/orthogonal) from a digital baseband (DBB) element (such as Fig. 1 signal processing logic unit 108)
Number, the I/Q input signals include the first (same to phase) component of signal (i.e. I) 222 and second (orthogonal) component of signal (i.e. Q) 224.Should
The complex input signal 222,224 that digital signal processing module 210 is further used for receiving is mapped to the one first same number of phases
The orthogonal digital control character (QDPA_W) 214 of word control character (IDPA_W) 212 and one second, and for export this with mutually and
Orthogonal digital control character is to a power amplifier module 230.
In the present embodiment, the power amplifier module 230 comprises at least a switch-mode power amplifier unit group (below
It is described in detail with reference to Fig. 5).The power amplifier module 230 is used for based on the same phase and orthogonal function received by least a portion
Word control character, the digital control character exported by the digital signal processing module 210 is received, and produce an analog radio frequency
Signal, can be transmitted by the radio frequency interface (such as the antenna 102).
In this manner, radiofrequency launcher 200 includes one the framework based on sophisticated signal, for example, one is based on I/Q
Framework, arrowband and wide-band modulation input signal are applied to this.Conversely, for example, a digital polar architecture, its
It is only applicable to because of the AM (amplitude modulation(PAM)) of polar architecture and the intrinsic bandwidth expansion characteristics of PM (phase-modulation) input signal
Narrow-band modulated.In addition, this framework based on I/Q avoids the demand for performing complicated algorithm, such as usually Digital Polarity
CORDIC (CORDIC) algorithm required for framework.Moreover, the radiofrequency launcher 200 also extends numeric field
To the power amplifier module 230, so as to can more utilize the scalability of digital element and efficiently than traditional radio architectures
Property.In addition, the radiofrequency launcher 200 in Fig. 2 is also using the high efficiency of switch-mode power amplifier unit group.
Switch-mode power amplifier unit group typically exhibits the input/output relation of nonlinearity, especially when defeated
Go out power it is higher when.Therefore, the digital signal processing module 210 is used to (make input signal 222,224 more detailed below
Illustrating) two-dimentional Non-uniformed mapping is to the digital control character 212,214.In this fashion, the two dimension of input signal 222,224
Non-uniformed mapping provides the predistortion of input signal 222,224, so as to make switch-mode power amplifier unit group
Nonlinear characteristic is compensated in the range of numeric field.
In some embodiments of the invention, digital pre-distortion is required more than received complex input signal
Sampling rate (for example, in the range of three times of input signal sampling rate), with two-dimensional digital predistortion (2D DPD) element 250
Output keep certain frequency spectrum.Therefore, the digital signal processing module 210 of Fig. 2 radiofrequency launcher 200 is included on one
Sampling/filter element 240, sampling/filter element 240 is used to perform the complex input signal 222,224 received on this
Sampling operation, to increase sampling rate to the input data rate of the power amplifier module 230.In addition, for other embodiment,
The input of the power amplifier input module 230 may include the operation of " sampling and holding ".In this way, can be in power amplifier mould
So-called DAC images are observed in the output of block 230, and the DAC images are created within produced by the input of power amplifier module 230
Sampling frequency segmentation.Therefore, the upper sampling rate of input signal 222,224 can increase the spacing of such image.
The digital signal processing module 210 of Fig. 2 radiofrequency launcher 200 further comprises digital pre-distortion element 250, should
Digital pre-distortion element 250 be used for should (above sample) input signal 222,224 Non-uniformed mappings to digital control character 212,
On 214.The digital control character 212,214 is output to one or more output ports, to be coupled to power amplifier module
230 one or more input ports.
Although an independent integrated circuit shown in Fig. 2 includes may be coupled to a different power amplifier module
230 at least one signal processing module 210, in other modes, the integrated circuit also can be replaced including at least signal
Other integrated circuits of processing module 210 and the function of power amplifier module 230.
As shown in figure 3, the digital signal processing module 210 may include a digital pre-distortion element 250, the numeral is lost in advance
The upper sampling that true strength part 250 is used to receive the complex input signal configures state with phase and quadrature component 222,224, and in predistortion
In sample (profile) 350, the complex input signal to receive identifies a predetermined vector most matched, and will be looked for
To predetermined vector be mapped to one group of digital control character that will be exported.Therefore, the digital pre-distortion element 250, which can be used, is somebody's turn to do
Predistortion configuration aspect 350 is quantified, and predistortion is applied to the upper sampling of received complex input signal simultaneously
With mutually and in quadrature component 222,224.In certain embodiments, predistortion configuration aspect 350 is at least partially based on the power
The input/output relation of amplifier module 230, it is based especially on the switch-mode power amplifier of power amplifier module 230
The input/output relation of unit group.In this way, predistortion may be used on compensate for power amplifier module characteristic (spy
Be not nonlinear switch-mode power amplifier unit characteristics) upper sampling input signal 242,244 in.
As with the embodiments shown in figures 2 and 3, the digital pre-distortion element 250 is in a forward path (feed-forward
It is path, opposite with feedback path) in realize.In this fashion, the digital pre-distortion element 250 can be each input sample
The nonlinear characteristic of direct compensation power amplifier module 230.This digital pre-distortion ratio according to sample is in feedback path
It is averagely more accurate across the digital pre-distortion of multiple input samples, and react sensitiveer.
As shown in figure 3, the complex input signal 222,224 that this is received by upper sampling, and sampling rate therein is increased
Add to the input data rate of power amplifier module 230 so that digital pre-distortion block element 250 and power amplifier module
230 can use same clock pulse signal 310.
Therefore, in the fig. 3 embodiment, the digital signal processing module 210 is used for (I/Q) input letter for receiving the complexity
Numbers 222,224, and digital control character 212,214 is arrived into sampling on signal that this is received and Non-uniformed mapping so that pre- mistake
The true non-linear behavior that can be applied to compensate power amplifier module 230, and can export digital control character 212,214 to
The power amplifier module 230.Wherein, the digital control character 212,214 exports for driving power amplifier module 230
Analog radio-frequency signal, the analog radio-frequency signal, which represents, samples complicated (I/Q) input signal 222,224 on this.Particularly, for inciting somebody to action
The predistortion configuration aspect 350 that input signal component 222,224 maps to digital control character 212,214 is sampled on this, can
The input/output relation of power amplifier module switch-mode power amplifier unit group 230 is at least partially based on, is come adaptive
The nonlinear characteristic of compensating switch mode power amplifier unit group.Therefore, the digital signal processing module 210 of the present embodiment exists
Two-dimentional (I/Q) digital predistortion function is provided in the forward path of radiofrequency launcher 200.
Referring to Fig. 4, the radiofrequency launcher 400 of another embodiment of the present invention includes a digital signal processing module 410,
The digital signal processing module 410 is used to receive one from digital baseband element (such as Fig. 1 signal processing logics unit 108)
Complicated (I/Q) input signal 222,224, and the complex input signal 222,224 received is mapped to digital control character
212nd, 214, arrive power amplifier module 230 to export digital control character 212,214.In the present embodiment, the data signal
Processing module 410 includes a upper sampling element 240, and sampling element 240 is used for the complex input signal to receiving on this
222nd, 224 sampling is carried out, upper sampling rate therein is increased to the input data rate of power amplifier module 230.Should
Digital signal processing module 410 also includes a digital pre-distortion element 250, and it is used for upper sampling input signal 222,224 is non-
It is even to be mapped to the digital control character 212,214.
Fig. 4 digital signal processing module 410 further comprises a noise shaping element 420, noise shaping member
Part 420 is used to receive the complex input signal.In the present embodiment, the complex input signal is including first (same to phase) and second (just
Hand over) on sampled signal component 242,244, and including one or more feedback signals from digital pre-distortion element 250
422、424.The noise shaping element 420 is based further on received at least part feedback signal 422,424, and noise is whole
Shape is applied in received upper sampled signal component 242,244, and by the input signal component after noise shaping
442nd, 444 export to the digital pre-distortion element 250.In this fashion, the digital pre-distortion element 250 is used to pass through this
Cross input signal component 442,444 Non-uniformed mappings to the digital control character 212,214 of sampling and noise shaping.
In this way, the noise shaped process of complex input signal 222,224 can be in numeric field and forward path
Interior progress, and the process prior to Non-uniformed mapping to digital control character 212,214 so that in the noise away from subcarrier region
Shaping can be kept, so as to improve the frequency spectrum of required remote frequency range.Particularly, it is contemplated that this noise shaping can also lead to
Configurable and/or programmable noise transfer function is crossed to realize.Thus, the radiofrequency launcher can be configured and/or programmed,
Requirement that strict multiple different wireless standards coexist is met with noise shaping needed for performing.
As shown in figure 4, noise shaping element 420 and digital pre-distortion element 250 can be used for forming an increment summation
(delta-sigma) modulator 450.In this way, the increment summation modulator 450, which can be used for receiving, samples complexity on this
(I/Q) input signal 242,244, and can be by the signal Non-uniformed mapping received to digital control character 212,214 so that
Noise shaping and predistortion can be applied to compensate the nonlinear characteristic of the power amplifier module 230, and export digital control word
212,214 are accorded with to the power amplifier module 230.Wherein, the digital control character 212,214 is used to drive the power amplification
Device module 230 exports analog radio-frequency signal, and the analog radio-frequency signal, which represents, samples complicated (I/Q) input signal 242,244 on this.
Particularly, the above-mentioned pre- mistake for being used to map to sampling input signal component 242,244 on this digital control character 212,214
True configuration aspect 350, can be at least partially based on the input of power amplifier module switch-mode power amplifier unit group 230/
Output relation, carry out the nonlinear characteristic of adequate compensation switch-mode power amplifier unit group.
Preferably, in increment summation modulator 450, quantization and two-dimensional digital predistortion are performed in this way, can
The quantizing noise corresponding to the predistortion file is produced, so as to realize noise shaping.By contrast, if two-dimensional digital
Predistortion performs after increment summation modulator 450, then the noise shaping effect will be non-due to the power amplifier module 230
Linear characteristic, and at least seem bad in a certain degree so that it can not see this make an uproar in the output of power amplifier module 230
Sound shaping, this is due to that digital pre-distortion is merely able to mitigate nonlinear characteristic in frequency approach signal, and noise shaping is often
In the frequency range away from signal band.
Referring to Fig. 5, its simplification figure for one embodiment of power amplifier module 230.The power amplifier module
230 are used to be at least partially based on the digital control character 212,214 received, receive what digital signal processing module 210 exported
Digital control character 212,214, and analog radio-frequency signal 530 is exported to be transmitted by radio frequency interface.In the present embodiment, pass through figure
1 antenna 102 transmits.The power amplifier module 230 include first switch mode power amplifier unit group (I-PA) 510 with
And second switch mode power amplifier unit group (Q-PA) 520.The first switch mode power amplifier unit group 510 is used for
Receive first (for example, same phase) the digital control character 212, and at least partially digital control based at least part received
Character 212 generates first (same to phase) component 532 of the analog radio-frequency signal 530.On the contrary, the second switch mode power amplifier
Unit group 520 is used to receive at least partly digital control character 214 of second (orthogonal), and based at least part numeral received
Control character 214 produces second (orthogonal) component 534 of analog radio-frequency signal 530.The component 532,534 independently with
It is combined afterwards to produce the complicated analog radio-frequency signal 530.
In this fashion, it is multiple by providing first, second switch-mode power amplifier unit group 510,520
Corresponding various dimensions component receives respective digital control character (for example, complicated (I/Q) signal) respectively, and is produced respectively for this
Component 532,534 (may then be combined) after amplification, can obtain one being capable of one multidimensional (such as I/Q) of digital control generation
The power amplifier module 230 of the signal of amplification.
In certain embodiments, each switch-mode power amplifier unit group 510,520 can be used for receiving at least partly
The corresponding digital control character 212,214 comprising N-bit.In addition, each switch-mode power amplifier unit group 510,520
It may include N number of switch-mode power amplifier unit 570, each Power Amplifier Unit 570 is used to receive corresponding numeral control
The control bit of character 212,214 processed.It is anti-that the switch-mode power amplifier unit 570 of the present embodiment includes an efficient D class
To structure.Each switch-mode power amplifier unit 570 is used to receive a corresponding control bit 575, and is based on receiving
Control bit 575 value, optionally export a current signal (Iout) 574.Each Power Amplifier Unit group 510,520
The switch-mode power amplifier unit 570 output coupling together so that single Power Amplifier Unit 570
Output current signal (Iout) 574 be combined, to provide each component 532,534 of analog radio-frequency signal 530.Power
The output current signal of the single switch mode power amplifier unit 570 of each in amplifier unit group 510,520
(Iout) 574 can be weighted according to the meaning (significance) of respective control bit.In this fashion, each power
Output current signal 574 after the combination of amplifier unit group 510,520 can represent received digital control character 212,
214 value.
Power amplifier module 230 shown in Fig. 5 can be realized digital-to-analog translation function combination power amplifier function
To simplify the design of radiofrequency launcher 400.Further it is provided that independent switch-mode power amplifier unit group 510,520 is with branch
Hold the I and Q component of the separation of complicated I/Q input signals so that the power amplifier module 230 is applied to arrowband and wide-band modulation
Input signal.
Further, first, second switch-mode power amplifier list of the power amplifier module 230 shown in Fig. 5
Tuple 510,520 is used to receive respective carrier frequency signaling 540,545 (will be described below), and further according at least one
The carrier frequency signaling 540,545 received is tapped, to produce the component 532,534 of analog radio-frequency signal 530.For example, carrier frequency
Rate signal 540,545 can be provided to each single switch-mode power amplifier unit (in Power Amplifier Unit respectively
In 570).In this fashion, the power amplifier module 230 shown in Fig. 5 can realize mixed function to power amplifier work(
In energy and digital-to-analog translation function.
In the present embodiment, the power amplifier module 230 also includes first (same to phase) phase selector 550, first phase
Digit selector 550 is used to receive a first carrier frequency signal (LO_I) 552 and one with phase phase flag signal 554, and
Based at least part received with phase phase flag signal 554, output one is with phase carrier frequency signaling 540 to including polarity
The first (same to phase) switch-mode power amplifier unit group 510.The power amplifier module 230 further comprises one second
(orthogonal) phase selector 555, the second phase selector 555 are used to receive second carrier frequency signaling 557 and one
Quadrature phase marking signal 559, and based at least part quadrature phase marking signal 559 received, export an orthogonal load
Frequency signal 545 is to second (orthogonal) switch-mode power amplifier unit group 520 including polarity.
The power amplifier module 230 of the present embodiment further includes an amplitude and marker generator module 560.The amplitude
And marker generator module 560 is used to receive the digital control character 212,214 that the digital signal processing module 210 exports,
And from each digital control character 212,214 produce corresponding to amplitude control words symbol 512,514 and marking signal 554,
559, amplitude control words symbol 512,514 includes digital control character 212,214 respective range weights, the marking signal respectively
554th, 559 include digital control character 212,214 respective mark components respectively.Then, there is provided amplitude control words symbol 512,
514 to respective switch-mode power amplifier unit group 510,520, and provides the marker 554,559 to respective phase
Digit selector 550,555.In this fashion, this is separated with the mark and amplitude mutually with quadrature signal component, so as to favourable
In the use of switch-mode power amplifier unit group.
Preferably as numeric field extends to power amplifier module 230, therefore it is not necessarily to put using linear predrive
Big device or baseband filter.In addition, use numerically controlled Power Amplifier Unit so that the work(of power amplifier module 230
Consumption changes with generally instantaneous radio frequency power output.
The output impedance of the power amplifier module 230 is on signal power level (signal power level)
Function (i.e. compression function).Therefore, the payload of each switch-mode power amplifier unit group 510,520 will include one
Combination, the combination includes the load for acting on output signal 530 and opposite (opposing) switch-mode-power is put
The output impedance of big device unit group 510,520.For example, the payload of first (same to phase) Power Amplifier Unit group 510 includes
One load by acting on the output signal 530 and the output impedance institute group of the second (orthogonal) Power Amplifier Unit group 520
Into combination.Therefore, the pay(useful) load of the first (same to phase) switch-mode power amplifier unit group 510 is Q channel power level
Function, the payload of second (orthogonal) switch-mode power amplifier unit group 520 is the function of I channel power level.
Therefore, the nonlinear characteristic of the power amplifier module 230 of the present embodiment be not fully a sophisticated signal power (| I |2+|
Q|2) function, while also depend on provide to the power amplifier module 230 same phase and orthogonal digital control character 212,
214.Therefore, although AM-AM and/or AM-PM corrections are put for traditional power with internal memory (short memory) in short-term
Generally enough, so, two-dimentional predistortion still needs for compensating this digital power amplifier module 230 big device device
Nonlinear characteristic, such as the predistortion provided by digital signal processing module shown in Fig. 2 and Fig. 4.
Referring to Fig. 6, it is the simplified flowchart of method provided in an embodiment of the present invention, this method is used to produce radio frequency mould
Intend signal to be transmitted in radio frequency interface.This method is started with step 605.Then, step 610 is gone to, reception includes and will led to
Cross the digital inphase and positive input signal of the information of radio frequency interface transmission.Next, in step 615, will be received
Sampled in input signal to an input data rate of a power amplifier module.In step 620, according to follow-up (step
625) feedback in digital pre-distortion stage, the input signal after upper sampling is subjected to noise shaping.In step 625, based on power
The non-homogeneous predistortion configuration aspect of amplifier module, is performed to the input signal after noise shaping and upper sampling operation
Two-dimensional digital predistortion operation, to produce with phase and orthogonal digital control character.Next, in act 630, separate with mutually and
The amplitude and mark component of orthogonal control character.In step 635, based on (at least part) with mutually respective with orthogonal control character
Indicate component, produce same phase and the orthogonal carrier frequencies signal indicated.In step 640, there is provided with phase and orthogonal control character
Range weight and same phase and the orthogonal carrier frequencies signal that indicated to respective with mutually being put with quadrature switching mode power
Big device unit group, to produce with phase and orthogonal simulation radio-frequency component signal., will be with phase and orthogonal simulation radio frequency point in step 645
Signal combination is measured, to generate a complicated analog radio-frequency signal, the analog radio-frequency signal includes to transmit in radio frequency interface
Information.This method is terminated with step 650.
In Fig. 5 digital power amplifier topological structure example, amplify per together phase and quadrature switching mode power
Device unit group 510,520 is required to pass on required peak power output to power amplifier module 230.However, work as power
Amplifier module 230 is operated in peak power output, with phase and quadrature switching mode power amplifier unit group 510,520
The Power Amplifier Unit group that middle any instant all only has half is used to.Specifically, power amplifier module is worked as immediately
In peak power output, the Power Amplifier Unit group for having half is not used, and causes the wave of chip area for 230 operations
Take.
Fig. 7 is the simplification circuit diagram of another Power Amplifier Unit 700, such as may be implemented in power amplifier module
230 substitute the Power Amplifier Unit 570 in Fig. 5.Power Amplifier Unit 700 includes an input stage 710.Input stage
710 include one first input 712, for receiving together phase control signal, such as include the one of in-phase digital control character 212
A control bit 713 in the same phase magnitude control word 512 of magnitude part.Input stage 710 has additionally comprised one second input 714, uses
To receive a Quadrature control signals, such as the orthogonal magnitude control word of the magnitude part comprising orthogonal digital control character 212
A control bit 715 in 514.The input stage 710 of Power Amplifier Unit 700 is used for based on the same phase and orthogonal control received
Signal exports a drive signal 716.Power Amplifier Unit 700 has additionally comprised an output stage 720, to input 722 one
The drive signal 716 that input stage 710 is exported is received, and produces an output signal 726 of Power Amplifier Unit 700 with response
The drive signal 716 received.
In Fig. 7 example, the input stage 710 of Power Amplifier Unit 700 includes together mutually sub- level 730, includes one
Input to form the first input 712 in input stage 710, for receiving representative with the one of the corresponding position 713 of phase control word 512
Input signal.An output 732 has been additionally comprised with mutually sub- level 730, has been coupled to the input 722 of output stage 720.Used with mutually sub- level 730
To drive an electric current of its output 732 according to the logic state of the corresponding position 713 with phase control word 512.For example, as schemed
Shown in 7, Power Amplifier Unit 700 can include a different amplifier units, for exporting a different output signals 726.Work(
One homophase input of rate amplifier unit 700 can include and (be directed to each differential signal path) one and door 734, same for receiving
Phase control word 512 everybody 713 and each differential portion with phase carrier frequency 540.So, each and output bag of door
Containing same phase control word 512 everybody 713 logic state a modulation representation.Include a common source with mutually sub- level 730
Pole amplifier transistor framework, for receiving modulation control signal in grid input node.Consequently, it is possible to modulation control signal is just
Meeting control electric current flows through the commonsource amplifier transistor architecture, therefore the electric current for controlling the output with mutually sub- level 730 to be driven.
Similarly, the input stage 710 of the Power Amplifier Unit 700 shown in Fig. 7 has additionally comprised a positive jiao zi level 740, bag
Containing an input to form the second input 714 in input stage 710, for receive represent orthogonal control word 514 everybody 715
One input signal.Positive jiao zi level 740 has additionally comprised an output 742, is coupled to the input 722 of output stage 720.Positive jiao zi level 740
For drive its output 742 an electric current with respond orthogonal control word 514 everybody 715 logic state.Power amplifier list
One orthogonal input of member 700 can include and (be directed to each differential signal path) one and door 744, for receiving orthogonal control word
514 each bit 715 and each differential portion of orthogonal carrier frequencies 545.So, it is each to include just with door output
Hand over control word 514 everybody 715 logic state a modulation representation.Positive jiao zi level 740 includes common source amplification
Device transistor architecture, for receiving modulation control signal in grid input node.Consequently, it is possible to modulation control signal will control
Electric current flows through the commonsource amplifier transistor architecture, therefore the electric current for controlling the output of positive jiao zi level 740 to be driven.
The output stage 720 of Power Amplifier Unit 700 be used for according to by the same phase of input stage 710 and positive jiao zi level 730,
The 740 merging electric currents inputted are to produce output signal 726.Especially in this example, input stage 710 and output stage 720
Jointly comprise one and repeatedly connect transistor topology structure, be that a pair of repeatedly connects framework more specifically.This pair repeatedly connects framework and grasped in high power
It is more reliable repeatedly to connect framework for relatively list under work.
Fig. 8 is a simplification mac function of a Power Amplifier Unit group 800 of Fig. 7 Power Amplifier Unit 700
Schematic diagram.Power Amplifier Unit group 800 includes N number of Power Amplifier Unit 700, for receiving a N positions with phase control word
512 and the orthogonal control word 514 in N positions.Power Amplifier Unit 700 can be orthogonal with phase control word 512 and N positions according to N positions
Corresponding position in control word 514 produces an output signal.The output signal 726 of Power Amplifier Unit 700 can then be closed
And to form analog radio-frequency signal 530, and launched by radio frequency interface, for example, sent out through antenna 102 as shown in Figure 1
It is shot out.Benefit is that N positions can share Power Amplifier Unit 700 with the orthogonal control word 514 of phase control word 512 and N positions, therefore
In N number of Power Amplifier Unit 700, using single Power Amplifier Unit group 800 two in Fig. 5 can be substituted to separate
Same phase, quadrature power amplifier unit group 510,520.Therefore, the area of chip can significantly be saved.
In the Power Amplifier Unit group 800 of the Power Amplifier Unit 700 shown in Fig. 8, due to each power amplification
Device unit 700 is shared by N positions with the orthogonal control word 514 of phase control word 512 and N positions, therefore for N positions with phase control word
The orthogonal control word 514 in 512 and N positions is come to open the program of Power Amplifier Unit group be just no longer event independent of each other.Fig. 9
It is the example of a complementary control word coordination mechanism.In this example, with each in phase control word 512 all with orthogonal control word
Paratope in 514 is paired.Such as with the position ' N-1 ' in the position ' 0 ' in phase control word 512 and orthogonal control word 514 it is paired；
It is paired with the position ' N-2 ' in the position ' 1 ' in phase control word 512 and orthogonal control word 514, the rest may be inferred.Power amplifier list
Each Power Amplifier Unit 700 thus can be same from N positions according to the complementary control word coordination mechanism shown in Fig. 9 in tuple 800
The orthogonal control word 514 of phase control word 512 and N positions receives paired control bit.
So, can be used for opening power with reciprocal order with phase control word 512 and orthogonal control word 514
Amplifier unit 700.For example, can be opened with phase control word 512 from one first ' end ' of Power Amplifier Unit group 800
Begin, Power Amplifier Unit 700 is always opened toward a first party, and orthogonal control word 514 can be from Power Amplifier Unit group
800 one second ' end ' starts, and Power Amplifier Unit 700 is always opened toward a second party.
Therefore, when (being closed during the sub-fraction in Power Amplifier Unit 700 using control word 512,514 only to open
And numeral≤N), there will not be overlapping situation, and with the influence meeting mutually and between orthogonal control word 512,514 and Fig. 5 institutes
The conventional digital power amplifier topology shown is similar.However, overlapped when between phase and orthogonal control word 512,514
Situation, due to having shared more than one Power Amplifier Unit, therefore reciprocal influence will be different between for those controls
In the conventional digital power amplifier topology shown in Fig. 5.
It refer to Figure 10, Figure 10 is and the simplification circuit diagram of another Power Amplifier Unit 100.Such as it may be implemented in
Power amplifier module 230 substitutes the Power Amplifier Unit 570 in Fig. 5.With the class of Power Amplifier Unit 700 in Fig. 7
Seemingly, the Power Amplifier Unit 1000 in Figure 10 includes an input stage 1010.Input stage 1010 includes one first input
1012, for receiving together phase control signal, such as include the control bit 1013 in same phase magnitude control word 512.Input stage
1010 have additionally comprised one second input 1014, for receiving a Quadrature control signals, such as comprising in orthogonal magnitude control word 514
A control bit 1015.The input stage 1010 of Power Amplifier Unit 1000 is used for based on the same phase and orthogonal control letter received
Number export a drive signal 1016.Power Amplifier Unit 1000 has additionally comprised an output stage 1020, in an input
The drive signal 1016 that 1022 reception input stages 1010 are exported, and produce an output signal of Power Amplifier Unit 1000
1026 with the received drive signal 1016 of response.
One homophase input of Power Amplifier Unit 1000 can include and (be directed to each differential signal path) one and door
1034, for receive same phase control word 512 everybody 1013 and each differential portion with phase carrier frequency 540.So,
It is each include with door output same phase control word 512 everybody 1013 logic state a modulation representation.Similarly,
One orthogonal input can include and (be directed to each differential signal path) one and door 1044, for receiving each of orthogonal control word 514
Position 1015 and each differential portion of orthogonal carrier frequencies 545.So, each output with door includes orthogonal control word
514 everybody 1015 logic state a modulation representation.
In the example shown in Figure 10, input stage 1010 includes a pair of OR gates 1052,1054, and the first OR gate 1052 is used for
Input receive control word 512,514 everybody 1013,1015 logic state each differential expression one first differential portion
Divide (such as a positive differential portion)；And the second OR gate 1054 be used for input receive control word 512,514 everybody 1013,1015
Logic state each differential expression one second differential portion (such as a negative differential portion).Input stage 1010 has additionally comprised
One is single, shared commonsource amplifier transistor architecture 1030, includes grid input node, be coupled to OR gate 1052,
1054 output.Consequently, it is possible to if the corresponding position 1013, any of 1015 of control word 512,514 includes a high logic value
When (such as ' 1 '), commonsource amplifier transistor architecture 1030 will export a driving current.
So benefit is, in the example shown in Figure 10, can use single and shared commonsource amplifier
Transistor architecture 1030 inputs sub- level 730,740 to substitute two in Fig. 7.Therefore, the area of chip can significantly be saved.To the greatest extent
Example shown in pipe Fig. 7 and Figure 10 is differential power amplifier unit group, and the present invention is also applicable to single-ended (i.e. non-differential)
Signal power amplifier unit group.
In the example shown in Fig. 7, only output stage 720 is shared and can be directed to I and Q input stage current signals one
Determine to be added in degree.However, in entirely shared topology framework in Fig. 10, the input stage of Power Amplifier Unit 1000
1010 and output and 1020 it can all share.Because Power Amplifier Unit is not powered on exactly closing, no matter in I and Q signal
One or two attempt open Power Amplifier Unit, be as a result all identical.Consequently, it is possible to the entirety in Figure 10 shares
It should avoid I/Q overlapping as far as possible in topology framework, such as code word cut can be passed through.
Figure 11 is the example of 2D code words configuration aspect after a cut.Which avoids the cooperation machine of the complementary control word in Fig. 9
It is overlapping that system produces I/Q.Significantly, under the nonlinear situation of power amplifier, the output voltage configuration aspect of power amplifier
It can still be held round, as shown in figure 12, represent output area and do not lose.
In some embodiments it is possible to cut is carried out before code word feed-in digital power amplifier, such as digital pre-
During distortion correction.Figure 13 is a simplification block diagram of the example that a predistortion correction is implemented, wherein a type of two-dimension codeword is matched somebody with somebody
Aspect is put by cut to avoid I/Q overlapping.Such as radiofrequency launcher framework in fig. 2 can be realized.In this example, number
Word predistortion element 250 is realized in digital signal processing module 210, includes an adaptivity algorithm part 1300.
Adaptivity algorithm part 1300 be for when radiofrequency launcher framework operation under one training/correction mode, perform number
The correction of word predistortion element 250, the example in especially Figure 13, to perform the school of the digital pre-distortion element 250 after cut
Just.
For example, as shown in figure 13, when the radiofrequency launcher framework is operated under a biography emission mode (' A '), number
Word predistortion element 250 is used for receiving sampling input signal 242,244 (Fig. 2) on two-dimentional (i.e. I/Q), for received this is defeated
Enter signal and perform predistortion, and export a two-dimensional digital controlling value, include digital control character 212,214, put to power
Big device module 230.But, when radiofrequency launcher framework operation is under one training/correction mode (' B '), digital pre-distortion is first
Part 250 is used for receiving a digital reference signal, includes a training signal 1310, and the numeral that will represent training signal 1310
Power amplifier control value 1320 is exported to power amplifier module 230.Digital pre-distortion element 250 is separately used for from power amplification
One output 1340 of device module 230 receives feedback signals 1330, and performs school based at least part feedback signal 1330
Just.Digital pre-distortion element 250 is dynamically set, such as by software, in emission mode ' A ' and training/correction mode
Switch between ' B '.
When digital pre-distortion element 250 is operated at training/correction mode ' B ', digital pre-distortion element 250 it is adaptive
Property algorithm 1300 be used for receiving training signal 1310, and will match somebody with somebody from the set of number power amplifier for representing training signal 1310
Put aspect data point and export a data point 1360 to one two-dimensional look-up tables 1365 of output.Once adaptivity algorithm 1300 receives
To data point output 1360, two-dimensional look-up table 1354 can export corresponding digital power amplifier controlling value 1320 to digital power
Amplifier module 230.
It is to provide feedback signal 1330 by a feedback path in example, the feedback path includes to decline inside one
Subtract device 1352, for receiving and performing decay to signal output 1340 by digital power amplifier module 230, to ensure
Frequency mixer does not drive excessively.Frequency mixer 1354 can be from the feedback signal after the receiving attenuation of attenuator 1352, and by it from load
Frequency signal is removed as the signal such as fundamental frequency signal.Next feedback signal can filter via analog filter 1356
Ripple, digital feedback signal 1330 is converted to by analog-digital converter 1358 again afterwards, and is sent to digital pre-distortion element
250.So, there is provided to digital power amplifier module 230 digital feedback signal 1330 form will correspond to numeral
The form of training signal 1310.
When receiving digital feedback signal 1330, adaptivity algorithm 1300 can map to two-dimensional look-up table by renewal
The digital power amplifier value of the digital training signal in 1365 to perform correction to digital pre-distortion element 250, such as
Make the value substantial convergence of digital feedback signal 1330 using an iterative program.For example, adaptivity algorithm 1300 can be used
Compare to perform the one of data signal signal (known reference signal) 1310 and feedback signal 1330, and based on this relatively come more
The digital power amplifier controlling value of the training signal data dot values mapped to corresponding to new within two-dimensional look-up table 1360.It is more detailed
Thin explanation refers to another application case (US20120269293) of patent applicant, and it can be in this summary reference.
Especially in Figure 13 example, adaptivity algorithm 1300 includes the two-dimensional adaptive algorithm of a cut,
For performing the correction of digital pre-distortion element 250 by updating the digital power amplifier controlling value, it is set to be limited to cut
Value is cut to avoid as I/Q caused by Fig. 9 complementary control word coordination mechanism is overlapping.
Figure 14 is the implementation example of the cut Two dimensional control character value.The Regional Representative two-dimensional digital power shown in Figure 14
Amplifier control word configures a quadrantal diagram 1400 of aspect, wherein I and Q code word be on the occasion of.Lower left corner gable
1410 represent allowed code word region, and in this scope, it is overlapping that I/Q will not occur for Fig. 9 complementary control word coordination mechanism.As
The other parts for limiting Figure 140 0 are then the code word region being not allowed to.Each code word in the region being not allowed in quadrantal diagram 1400
A single code word in lower left corner part 1410 can all be mapped to.For example, the code word in region 1420 can be with a Vertical Square
Always lower left corner part 1410 is mapped to, that is, keeps its I code word value, but its Q code word value is mapped to the first permission Q code words
Value.Similarly, the code word in region 1430 can be mapped to lower left corner part 1410 with a horizontal direction, that is, keep its Q code
Word value, but its I code word value is mapped to the first permission I code word values.It is single that code word in all areas 1440 can be mapped to one
Allow code word, as indicated by the arrows.
All the four of aspect is configured in the digital power amplifier control character when the code word cut shown in Figure 14 is applied
During individual quadrant, a brilliant cut mechanism can be caused.So this is only an example, and the present invention is not limited with this.Also alterable of the invention
For for example circular cut mechanism, polygonal (such as octagon) cut mechanism etc..In other examples, I+Q be less than or
Code word equal to a critical value (such as all unit numbers) can not be by cut, and the code word that need to be more than the critical value to I+Q is carried out
Cut.
The advantage of the invention is that the cut in trimming process can reduce the code word number allowed, therefore it can simplify and correct
Journey.
It refer to Figure 15 and Figure 16, Figure 15 is to perform the digital pre-distortion of signal for being launched in radio frequency interface
A part of simplified flowchart 1500.Figure 16 is to perform the another of the digital pre-distortion of signal for being launched in radio frequency interface
Simplified partial flow chart 1600.One Part I of this method, i.e. a first mode (emission mode), start in step 1510
And a digital input signals are received, such as the upper sampling input signal 242,244 shown in Fig. 2~Fig. 4.Then, in step
In 1520, the data point cluster closest to the input signal can be judged in a digital power amplifier configures aspect.In step
In rapid 1530, the digital power amplifier controlling value for mapping to the clustered data point can be drawn from a look-up table.Consequently, it is possible to
Multiple digital power amplifier controlling values can be selected from one first group in the digital power amplifier controlling value.In step
In rapid 1540, resulting digital power amplifier controlling value can be directed to and carry out interpolation with from the digital power amplifier controlling value
In one second group in determine a digital power amplifier controlling value.In some examples, second group of digital power amplification
Device controlling value includes a controlling value cut group to avoid I/Q overlapping, such as the complementary control word cooperation machine according to Fig. 9
System.In step 1550, it will can be controlled from the second group of digital power amplifier for representing the digital input signals received
The digital power amplifier controlling value that value determines is exported to a digital power amplifier module.And end at step
1560。
One Part II of this method, i.e. a second mode (training mode), searched in step 1610 for a two dimension
Every bit in table proceeds by a update mechanism.Then, in step 1620, a training signal is sent, includes a digital IQ letters
Number.In step 1630, obtain mapping to a corresponding digital power amplifier of the training signal value in two-dimensional look-up table
Control character, and exported in step 1640 to the digital power amplifier module.In step 1650, put from the digital power
One output of big device module obtains a feedback signal.Then the training signal with a linear gain G is judged in step 1660
It is substantially equal (restraining) with the feedback signal.If not restraining, flow can enter step 1670, wherein mapping to the training
The digital power amplifier controlling value of signal value can be updated, so that the feedback signal is equal to the instruction with linear gain G
Practice signal value.Specifically, this method is to update the digital power amplifier control word to be maintained in the range of cut limitation, is entered
And avoid with mutually and orthogonal overlapping.Then flow can return to step 1640.Step 1660 is please returned to once again, if linear when having
The training signal of gain G and the feedback signal are substantially equal (restraining), then flow can return to step 1680 and stop.
Figure 17 is refer to, Figure 17 is the simplification block diagram of another implementation example of a predistortion correction.A wherein Quick Response Code
Word configuration aspect can be by cut to avoid I/Q overlapping, and this design is used in Fig. 2 radiofrequency launcher framework.Scheming
It is the progress code word cut (step 1710) after digital pre-distortion in 17 example.
The electronics that major part in exemplary embodiment illustrated by the present invention has been familiar with via those skilled in the art
Element and circuit are realized.Therefore, in order to strengthen the understanding to basic conception of the present invention, and avoid confusion or mislead the present invention
Teaching, the above explanation not just further details work deeper into explanation.
In the above specification, specific example of the present invention with reference to embodiments of the invention.Fail to understand and instruct, as long as
The various modifications and variations for not departing from the broader spirit and scope of the invention illustrated in appended claims can all be permitted
Perhaps.
The signified connection in specification in the whole text, as discussed in this article can be any kind of connection to transmit letter
Number, it can be from/to up to each node, unit or device, such as pass through mediating device.Therefore, unless implying or separately having
Bright, connection may, for example, be connected directly or indirectly.The connection can be explained or be described as that one single connect, be multiple
Connection, unidirectional connection is bi-directionally connected.However, different embodiments can also change the implementation of connection.For example, it can adopt
With individually unidirectionally connecting rather than being bi-directionally connected, vice versa.Multiple signals are serially transmitted furthermore it is possible to use or with multiplexing
The singular association of mode replace multiple connections.Likewise, carrying the single connection of a plurality of signals can be divided into
Carry a variety of connections of the subset of these signals.Therefore, there are many available options in the mode of transmission signal.
Each signal described herein can be designed as positive or negative logic.In the case of negative logic signal, letter
Number it is that wherein, it is effective that logically true state corresponds to logic level zero low level.In the case of positive logic signal, refer to that low state has
Effect, that is, logic are that genuine state corresponds to logic level 1.It note that any signal described herein can be designed
Into negative or positive logical signal.Therefore, in alternative embodiments, the such signal for being described as positive logic signal may be implemented as bearing
Logical signal, and the such signal for being described as negative logic signal may be implemented as positive logic signal.
The vocabulary such as (or " area disappear declaration " or " removing ") referred to herein as will letter in addition, " declaration ", " setting " or " cancellation "
Number, mode bit or similar device be set as its logic true or false state.If logically true state is logic level 1, patrol
It is logic level 0 to collect false state.And if logically true state is logic level 0, then logically false state is logic level 1.
Those skilled in the art will be understood that the border between logical blocks is merely illustrative, and in alternate embodiment
In, logical blocks or circuit element can be merged, or various logic block or circuit element are decomposed.Therefore, should
When the framework described herein of understanding is merely exemplary, in fact, many other architectures can be adopted to realize
Identical function.
The element arrangement of any achievable identical function belongs to effective " correlation ", to realize required function.Therefore,
Combined in this any two element to realize that specific function may be regarded as being " associated with " each other, required with realization
Function, either architectural or intermediary element.Similarly, the two components so associated can also be regarded as " can grasp each other
The function of work ground connection " or " being operatively coupled " needed for realization.
In addition, the border that those skilled in the art should be able to be recognized between aforesaid operations is merely illustrative.It is the multiple
Operation can be combined into a single operation, if single operation can be distributed in extra dry run, and can be at least
If dry run is performed in the case of having part-time overlapping.In addition, alternate embodiment can include multiple situations of specific operation,
And the order operated can be changed in other embodiments.
But, other modifications, variations and alternatives can also be added.Therefore the specification and drawings should be identified as it is illustrative and
It is non-limiting.
In the claims, any label being placed between bracket is not necessarily to be construed as limiting claim.Vocabulary " bag
Containing " represent compared to the part listed in claim outside, it is not excluded that other elements or step.It is in addition, used herein
Vocabulary "one" or " one kind ", one or more than one should be defined as.In addition, use introduction, such as " at least one " and " one
Or multiple " it is not construed as being implied with another claim member of indefinite article "a" or "an" in the claims
Part, to limit hair of any any specific rights requirement containing the claim element so imported as only one this element
It is bright, even if when same claim includes introduction " one or more " or " at least one " and indefinite article such as " one " or " one
It is individual ".Use for definite article is same.Unless otherwise indicated, vocabulary such as " first " and " second " is used between element
Any differentiation.Therefore, these terms might not be intended to refer to the time of this class component or other priority.Some means quilts
It is documented in and the combinations of these technological means is not intended in mutually different claim can not be advantageously used.
Presently preferred embodiments of the present invention is the foregoing is only, all equivalent changes done according to claims of the present invention are with repairing
Decorations, it should all belong to the covering scope of the present invention.
Claims (14)
1. a kind of power amplifier module, the power amplifier module includes multiple Power Amplifier Unit, and its feature exists
In the Power Amplifier Unit includes：
One first input, for receiving together phase control signal；
One second input, for receiving a Quadrature control signals；
One input stage, for based on the same phase control signal that is received of at least part and the Quadrature control signals come defeated
Go out a drive signal；And
One output stage, for the drive signal exported from an input reception input stage, and produce the power and put
One output signal of big device unit is to respond the drive signal of reception；
Wherein together each bit is all paired with the complementary bit in an orthogonal control word in phase control word, the power amplifier
Unit receives this with phase control word and a paired bit of orthogonal control word, also, this is paired by this with phase control signal
Bit in this be multiplied what is obtained with same phase carrier frequency signaling with the bit of phase control word, the Quadrature control signals be by this into
To bit in bit and the orthogonal carrier frequencies signal multiplication of the orthogonal control word obtain.
2. power amplifier module according to claim 1, it is characterised in that the input stage includes：
Together mutually sub- level, includes an input and an output, and the input is used for receiving representing the same phase control signal
One input signal, described to export the input for being coupled to the output stage, the same mutually sub- level is used for driving at its output
An electric current to respond a logic state of the same phase control signal；And
One positive jiao zi level, includes an input and an output, the input of the positive jiao zi level be used for receiving represent it is described orthogonal
One input signal of control signal, the output of the positive jiao zi level are coupled to the input of the output stage, the positive jiao zi
Level is used for driving the electric current at its output to respond a logic state of the Quadrature control signals.
3. power amplifier module according to claim 2, it is characterised in that the output stage is used for producing the power
The output signal of amplifier unit merges electric current to respond the one of its input.
4. power amplifier module according to claim 1, it is characterised in that the input stage include at least one or
Door, for receiving the same phase control signal in one first input and the Quadrature control signals in one second input,
And the input stage is used for exporting a current signal to respond the logic state that the OR gate is exported.
5. power amplifier module according to claim 1, it is characterised in that the input stage and the output stage bag
Repeatedly transistor topology structure is connect containing one.
6. power amplifier module according to claim 5, it is characterised in that the input stage includes a pair of and changed binding
Structure.
7. power amplifier module according to claim 1, it is characterised in that
The input stage is used for poor to export one based at least partly same phase control signal and the Quadrature control signals
Dynamic drive signal；And
The output stage, for receiving the Differential Driving signal that input stage described in a differential input is exported, to produce
One differential output signal of the Power Amplifier Unit is to respond the Differential Driving signal of reception.
8. power amplifier module according to claim 1, it is characterised in that the Power Amplifier Unit includes one
Switch mode power cell.
9. a kind of communication unit, it is characterised in that the communication unit includes power amplifier mould as claimed in claim 1
Block.
10. a kind of radiofrequency launcher, it is characterised in that the radiofrequency launcher includes at least digital signal processing module use
To operate in an emission mode, wherein an at least digital signal processing module is used for：
Receive a digital input signals；
From a cut section of digital power amplifier controlling value a numeral is selected based at least partly described digital input signals
Power amplifier control value；And
Will represent it is described reception digital input signals selected digital power amplifier controlling value export to it is at least one such as
Power amplifier module described in claim 1, wherein the digital power amplifier controlling value includes the same phase control word
With the orthogonal control word.
11. radiofrequency launcher according to claim 10, it is characterised in that the digital power amplifier controlling value is cut
Section is cut to avoid according to the same phase of a complementary control word coordination mechanism and orthogonal overlapping.
12. radiofrequency launcher according to claim 11, it is characterised in that mapped at least by the code word for being intended to forbid
One code word being allowed to carrys out the cut section of digital power amplifier controlling value described in cut.
13. radiofrequency launcher according to claim 10, it is characterised in that at least digital signal processing module behaviour
Make in one training/correction mode, wherein an at least digital signal processing module is used for：
Receive a digital training signal；
The digital power amplifier controlling value for representing the digital training signal received is exported to an at least power
Amplifier module；
A feedback signal is received from an output of an at least digital power amplifier module；And
The feedback signal is at least based on, the cut section of the digital power amplifier controlling value is corrected, makes institute
Digital power amplifier controlling value is stated to be maintained in the range of cut limitation to avoid according to the same of a complementary control word coordination mechanism
It is mutually and orthogonal overlapping.
A kind of 14. method that digital pre-distortion correction is performed in a radio architectures, it is characterised in that methods described includes：
Receive a digital training signal；
The digital power amplifier controlling value for representing the digital training signal received is exported to an at least power amplification
Device module；Wherein, the digital power amplifier controlling value is included with phase control word I and orthogonal control word Q；
A feedback signal is received from an output of an at least digital power amplifier module；And
The feedback signal is at least based on, the cut section of the digital power amplifier controlling value is corrected, makes the number
Word power amplifier control value is maintained in the range of cut limitation to avoid according to the same phased of a complementary control word coordination mechanism
Word I processed and orthogonal control word Q are overlapping, wherein, in trimming process, I+Q is less than or put equal to the digital power of a critical value
For big device controlling value not by cut, I+Q is more than the digital power amplifier controlling value of the critical value by cut.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361825628P | 2013-05-21 | 2013-05-21 | |
| US61/825,628 | 2013-05-21 | ||
| US14/280,672 | 2014-05-19 | ||
| US14/280,672 US9559879B2 (en) | 2011-04-21 | 2014-05-19 | PA cell, PA module, wireless communication unit, RF transmitter architecture and method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104184420A CN104184420A (en) | 2014-12-03 |
| CN104184420B true CN104184420B (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410216196.8A Expired - Fee Related CN104184420B (en) | 2013-05-21 | 2014-05-21 | Power Amplifier Unit and related device and digital pre-distortion bearing calibration |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104184420B (en) |
| TW (1) | TWI531189B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7007809B2 (en) * | 2017-03-24 | 2022-02-10 | シナプティクス・ジャパン合同会社 | Digital signal transmission device, clock signal transmission device, and reception circuit |
| CN109361362A (en) * | 2018-12-18 | 2019-02-19 | 中国电子科技集团公司第五十四研究所 | A kind of solid-state high power amplifier |
| TWI806054B (en) * | 2021-05-19 | 2023-06-21 | 瑞昱半導體股份有限公司 | Transmitter and associated calibration method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036359A (en) * | 2004-08-12 | 2007-09-12 | 德州仪器公司 | Method and apparatus for a fully digital quadrature modulator |
| CN101167324A (en) * | 2005-04-29 | 2008-04-23 | 诺基亚公司 | Reconfigurable transmitter with direct digital to RF modulator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8195103B2 (en) * | 2006-02-15 | 2012-06-05 | Texas Instruments Incorporated | Linearization of a transmit amplifier |
| US20110129037A1 (en) * | 2009-11-30 | 2011-06-02 | Bogdan Staszewski | Digital power amplifier with i/q combination |
-
2014
- 2014-05-21 CN CN201410216196.8A patent/CN104184420B/en not_active Expired - Fee Related
- 2014-05-21 TW TW103117786A patent/TWI531189B/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036359A (en) * | 2004-08-12 | 2007-09-12 | 德州仪器公司 | Method and apparatus for a fully digital quadrature modulator |
| CN101167324A (en) * | 2005-04-29 | 2008-04-23 | 诺基亚公司 | Reconfigurable transmitter with direct digital to RF modulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104184420A (en) | 2014-12-03 |
| TW201513614A (en) | 2015-04-01 |
| TWI531189B (en) | 2016-04-21 |
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