CN209218087U - A kind of radio frequency topological system and communication device - Google Patents
A kind of radio frequency topological system and communication device Download PDFInfo
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Abstract
This application discloses a kind of radio frequency topological system and communication device, which includes at least antenna, radio frequency sending set, radio-frequency transmitter and local oscillator；Radio frequency sending set is connect with antenna, and for generating the first signal, radio frequency sending set emits the first signal by antenna；Radio-frequency transmitter is connect with antenna, for receiving second signal by antenna；Local oscillator is connect with radio frequency sending set and radio-frequency transmitter respectively, and for providing orthogonal local oscillation signal for radio frequency sending set or radio-frequency transmitter, the frequency of oscillation of local oscillator is twice of the frequency of antenna；Wherein, radio frequency sending set includes zero intermediate frequency chip, and local oscillator is connect with zero intermediate frequency chip, and zero intermediate frequency chip is for carrying out orthogonal local oscillation signal using Direct-conversion to down-convert to baseband signal.By the above-mentioned means, the application can prevent Image interference, and avoid using complicated sequence control circuit, repeater function is realized using a local oscillator, simplifies board area.
Description
Technical field
This application involves fields of communication technology, and in particular to a kind of radio frequency topological system and communication device.
Background technique
Although radio frequency and microwave theory there are many year history, and between recent two decades radio circuit experienced it is winged
Speed development, but very big challenge is still had in terms of the design and implementation of radio circuit and transceiver.The design of radio circuit
Need to weigh the tradeoff considered between each radio-frequency performance parameter, while high-performance, low cost and more Multifunction small volum
The requirement of design constantly proposes new challenge to radio circuit design.
Tetra (Trans European Trunked Radio, pan-European trunked radio) is one kind towards next-generation number
The open-standards of word formula mobile communication；Its major advantage is good compatibility, opening is good, the availability of frequency spectrum is high and secrecy
Property it is strong, it is to participate in the most digital clustering communication system of manufacturer.Tetra digital clustering communication system is based on TDMA (time
Division multiple access, time division multiple acess) technology professional mobile communication system, General System is by base station and movement
Terminal composition.
The topological structure for supporting Tetra at present is essentially all that receiving path is based on double conversion, transmitting path antenna opening
The irrelevant structure with local oscillator；But structure is complicated, higher cost.
Summary of the invention
The application mainly solves the problems, such as to be to provide a kind of radio frequency topological system and communication device, and mirror image can be prevented dry
It disturbs, and avoids using complicated sequence control circuit, realize repeater function using a local oscillator, simplify circuit board
Area.
In order to solve the above technical problems, the application is the technical solution adopted is that provide a kind of radio frequency topological system, the radio frequency
Topological system includes at least antenna, radio frequency sending set, radio-frequency transmitter and local oscillator；Radio frequency sending set is connect with antenna,
For generating the first signal, radio frequency sending set emits the first signal by antenna；Radio-frequency transmitter is connect with antenna, for passing through
Antenna receives second signal；Local oscillator is connect with radio frequency sending set and radio-frequency transmitter respectively, for being radio frequency sending set
Or radio-frequency transmitter provides local oscillator orthogonal signalling, the frequency of oscillation of local oscillator is twice of the frequency of antenna；Wherein, it penetrates
Channel transmitter includes zero intermediate frequency chip, and local oscillator is connect with zero intermediate frequency chip, and zero intermediate frequency chip is used to become using directly lower
Frequency carries out orthogonal local oscillation signal to down-convert to baseband signal.
In order to solve the above technical problems, another technical solution that the application uses is to provide a kind of communication device, the communication
Device includes the radio-frequency transmitter and radio frequency sending set in above-mentioned radio frequency topological system.
Through the above scheme, the beneficial effect of the application is: the radio frequency topological system includes antenna, radio frequency sending set, penetrates
Frequency receiver and local oscillator, radio-frequency transmitter include zero intermediate frequency chip, are antenna frequencies two using a frequency of oscillation
Local oscillator again generates orthogonal local oscillation signal, then carries out two divided-frequency to orthogonal local oscillation signal by frequency dividing circuit, then sharp
Direct-conversion is carried out to the orthogonal local oscillation signal after frequency dividing with zero intermediate frequency chip, prevents Image interference, and avoid using
Complicated sequence control circuit realizes repeater function, circuit board using a local oscillator to realize repeater function
Area greatly simplifies.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is Tetra terminal D MO working timing figure in the prior art；
Fig. 2 is the Tetra terminal interaction figure for supporting relaying in the prior art.
Fig. 3 is the Tetra terminal D MO working timing figure for supporting relaying in the prior art；
Fig. 4 is the topological structure of Tetra terminal in the prior art；
Fig. 5 is the structural schematic diagram of one embodiment of radio frequency topological system provided by the present application；
Fig. 6 is the structural schematic diagram of another embodiment of radio frequency topological system provided by the present application；
Fig. 7 is the structural schematic diagram of the another embodiment of radio frequency topological system provided by the present application；
Fig. 8 is the structural schematic diagram of one embodiment of communication device provided by the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, rather than whole embodiments.Based on this
Embodiment in application, those of ordinary skill in the art are obtained every other under the premise of not making creative labor
Embodiment shall fall in the protection scope of this application.
Tetra terminal work mode is generally divided into DMO (Direct Mode Operation, direct working method) and TMO
(Trunked Mode Operation, cluster working method), they are four time slot working methods；As shown in Figure 1, the first time slot
T1 emits signal, and third time slot T3 receives signal, and the second time slot T2 and the 4th time slot T4 are in idle mode, and each time slot can be with
For 14.167ms；So as in each working time slot, there are abundant times, so that hardware circuit is worked well in advance
Prepare.
Tetra terminal can have repeater function, and link terminal is used to connect the DMO mode of two normal works
Tetra terminal, and then the Tetra terminal communication distance that will be operate under DMO mode doubles, as shown in Figure 2；Eventually to relaying
For end, need to take all four time slots to realize that emitted signal to two DMO call terminals is transferred, to reach
The function of forwarding is realized to speech range is increased, and working timing figure is as shown in Figure 3.
For the circuit of real work, because receiving or transmission time slot offhand time completes transmitting-receiving frequency source
Conversion, this requires driving local oscillator before actually receiving or transmission time slot starts, receive or emit start when
Quarter commences work without delay, general just to need two groups of phaselocked loops and voltage controlled oscillator (VCO, Voltage Controlled
Oscillator it) takes turns to operate, increases the expense of cost and system power dissipation.
Tetra terminal is as shown in figure 4, for transmitting terminal in the prior art, the first voltage controlled oscillator 41 of Tetra terminal
Frequency of oscillation be 2/3 times of antenna opening frequency F0；It will be from the first voltage controlled oscillator using the trebling circuit 42 of Tetra terminal
The frequency upgrading of 41 signals received is then sent to cartesian loop chip 43, flute card to twice of antenna opening frequency F0
The signal received is transformed into orthogonal local oscillation signal by two circuits that remove inside your loop chip 43, while the signal received
Frequency be reduced to the frequency F0 of antenna opening and launched by antenna 48.It, will be from day using frequency mixer 45 for receiving end
The mixed intermediate-freuqncy signal out of the signal that the signal and the second voltage controlled oscillator 44 that line 48 receives generate, using bandpass filter 46
Stray wave is filtered out, to obtain intermediate-freuqncy signal, intermediate-freuqncy signal is then transmitted to if demodulator 47 and is demodulated, to obtain
Baseband signal.
It is the structural schematic diagram of one embodiment of radio frequency topological system provided by the present application refering to Fig. 5, Fig. 5；Radio frequency topology
System includes at least: antenna 51, radio frequency sending set 52, radio-frequency transmitter 53 and local oscillator 54.
Radio frequency sending set 52 is connect with antenna 51, and radio frequency sending set 52 is sent out for generating the first signal, and by antenna 51
Penetrate the first signal；The first signal that radio frequency sending set 52 emits is high-frequency high-power signal, and it is adjacent to other should to minimize it
The interference of channel.
Radio-frequency transmitter 53 is connect with antenna 51, and radio-frequency transmitter 53 is used to receive second signal by antenna 51.
Local oscillator 54 is connect with radio frequency sending set 52 and radio-frequency transmitter 53 respectively, and local oscillator 54 is used to penetrate
Channel transmitter 52 or radio-frequency transmitter 53 provide orthogonal local oscillation signal, and the frequency of oscillation of local oscillator 54 is the frequency of antenna 51
Twice of rate F0.
Due to needing local oscillation signal to need strict orthogonal, the generation of orthogonal signalling is needed through frequency divider, so local vibration
Device 54 is swung to need to vibrate in two frequencys multiplication for receiving frequency；Local oscillator 54 can be voltage controlled oscillator, be output frequency
There are the oscillating circuit of corresponding relationship, the working condition of voltage controlled oscillator or the component parameters of oscillation circuit with the control voltage of input
The control of the control voltage inputted, output frequency change with the variation of additional control voltage.
Radio-frequency transmitter 53 includes zero intermediate frequency chip 531, and zero intermediate frequency chip 531 is used to utilize Direct-conversion (zero intermediate frequency)
Method carries out orthogonal local oscillation signal to down-convert to baseband signal.
Wherein, baseband signal is signal source sending without the original telecommunications through ovennodulation (carrying out frequency spectrum shift and transformation)
Number, frequency spectrum is integrated near zero-frequency.
Zero intermediate frequency chip 531 has been internally integrated frequency dividing circuit (not shown), and frequency dividing circuit is for believing orthogonal local oscillation
Number carry out two divided-frequency, the signal after frequency dividing is mixed with the signal received from antenna 51 using zero intermediate frequency chip 531, is made
It obtains local frequency (frequency of oscillation of local oscillator 54) and is equal to carrier frequency, i.e., so that intermediate frequency is ωIF=0, then there is no
Image frequency avoids the interference of image frequency.
The gain of radio-frequency transmitter 53 is not high, the requirement for the linear dynamic range that is content with very little, and due to not having inhibition mirror image
The filter of frequency also need not just consider the matching problem of amplifier and it, due to being baseband signal after Direct-conversion,
Channel need not be selected using special intermediate-frequency filter.
Radio frequency sending set 52 and radio-frequency transmitter 53 in this embodiment share an antenna 51, antenna 51 and radio-frequency transmissions
Transmitting-receiving conversion and isolation must be effectively performed between machine 52 and radio-frequency transmitter 53, done with reducing transmitting signal to signal is received
It disturbs.
This system can also include radiator for radiating to radio frequency sending set 52 and radio-frequency transmitter 53 (in figure
It is not shown), which can be chip cooling fin or liquid cooling heat radiator etc..
It is different from the prior art, present embodiments provides a kind of radio frequency topological system, which includes antenna
51, radio-frequency transmitter 53, radio-frequency transmitter 53 and local oscillator 54, radio-frequency transmitter 53 include zero intermediate frequency chip 531, are made
Orthogonal local oscillation signal is generated with the local oscillator 54 that a frequency of oscillation is twice of antenna frequencies, then by frequency dividing circuit to just
It hands over local oscillation signal to carry out two divided-frequency, then carries out directly lower become using the orthogonal local oscillation signal after 531 pairs of zero intermediate frequency chip frequency dividings
Frequently, it prevents Image interference, and avoids using complicated sequence control circuit to realize that repeater function, board area are big
It is big to simplify.
It is the structural schematic diagram of another embodiment of radio frequency topological system provided by the present application refering to Fig. 6, Fig. 6；The radio frequency is opened up
The system of flutterring includes at least: antenna 61, radio frequency sending set 62, radio-frequency transmitter 63 and local oscillator 64.
Antenna 61 is for sending the first signal or receiving second signal；Radio frequency sending set 62 is connect with antenna 61, radio frequency
Transmitter 62 emits the first signal for generating the first signal, and by antenna 61；Radio-frequency transmitter 63 is connect with antenna 61, is penetrated
Frequency receiver 63 is used to receive second signal by antenna 61.
Radio frequency sending set 62 includes zero intermediate frequency chip 631, and local oscillator 64 is for generating orthogonal local oscillation signal, zero intermediate frequency
Chip 631 using Direct-conversion orthogonal local oscillation signal for that will carry out down-converting to baseband signal.
Due to the loss and multipath effect on signal transmission path, 63 received signal of radio-frequency transmitter is faint and becomes again
Change, and along with many interference, these interference signal intensities may be greater than useful signal, it is therefore desirable to which filter filters out this
A little interference signals.
Radio-frequency transmitter 63 further includes first filter 632 and second filter 633.First filter 633 is connected to zero
Between intermediate frequency chip 631 and antenna 61, first filter 632 is for being filtered second signal, and by filtered signal
It is supplied to zero intermediate frequency chip 631.Second filter 633 connects zero intermediate frequency chip 631 and local oscillator 64, for zero intermediate frequency
The control signal (pulsating direct current signal) of chip 631 is filtered, and filtered control signal (direct current signal) is supplied to
Local oscillator 64, to control the frequency of oscillation of local oscillator 64.
Preferably, first filter 632 is bandpass filter, and centre frequency is very high, therefore bandwidth is larger, can be used for
Select frequency band；Second filter 633 is low-pass filter, and low-pass filter can filter out high-frequency signal.
Zero intermediate frequency chip 631 includes frequency divider (not shown), and frequency divider is except two circuits, for believing orthogonal local oscillation
Number carry out two divided-frequency.
It is different from the prior art, present embodiments provides a kind of radio frequency topological system, which includes zero
Intermediate frequency chip 631, first filter 632 and second filter 633；First filter 632 is used for filtering interference signals, the second filter
Wave device 633 is used to provide control voltage to local oscillator 64；It is directly vibrated using a local oscillator 64 in 61 frequency of antenna
Twice of rate carries out Direct-conversion using zero intermediate frequency chip 631, prevents Image interference, and avoid using it is complicated when
Gap control circuit realizes repeater function to realize repeater function, using a local oscillator 64, and board area is big
It is big to simplify.
It is the structural schematic diagram of the another embodiment of radio frequency topological system provided by the present application refering to Fig. 7, Fig. 7；The radio frequency is opened up
The system of flutterring includes at least: antenna 71, radio frequency sending set 72 and radio-frequency transmitter 73, local oscillator 74,75 and of notch diplexer
Digital signal processor 76.
Antenna 71 is for sending the first signal or receiving second signal；Radio frequency sending set 72 is connect with antenna 71；Radio frequency
Transmitter 72 emits the first signal for generating the first signal, and by antenna 71；Radio-frequency transmitter 73 is connect with antenna 71, is penetrated
Frequency receiver 73 is used to receive second signal by antenna 71.
Digital cluster system mostly uses linearity modulation technique (such as: π/4-DQPSK), the frequency spectrum benefit of linear digital modulation system
It is higher with rate, while radio frequency sending set 72 also being required to have very high linearisation degree.According to the radio-frequency transmissions of poor linearity
Machine 72, will lead to modulated signal distortion, product spread spectrum, since digital cluster system is mostly narrow band signal, thus frequency spectrum
Extension can bring more serious monkey chatter, in order to meet requirement of the digital cluster system to neighboring trace parasitic emission, it is necessary to use
The radio frequency sending set 72 of High Linear degree.
In this embodiment, radio frequency sending set 72 includes cartesian loop chip 721, amplifier 722 and coupler 723, flute
Karr loop chip 721, amplifier 722 and coupler 723 form Descartes's feedback loop.
For cartesian loop chip 721 for receiving baseband signal I and Q, signal I and signal Q are orthogonality relation, signal I and
Signal Q is simulation time-domain signal；Cartesian loop chip 721 to baseband signal I and Q be modulated and up-conversion after be sent to and put
Big device 722, amplifier 722 send coupler 723 to after amplifying to the signal received, coupler 723 will receive
Signal is handled and is sent to cartesian loop chip 721 and demodulated.
Feedback signal in Descartes's feedback loop is obtained by the coupling of coupler 723, and is reduced to orthogonal two
Roadbed band signal, cartesian loop chip 721 carry out its difference by comparing two-way base-band input signal and feedback signal
Up-conversion is carried out after forward direction i/q signal pre-distortion, and synthesizes signal all the way and is conveyed to amplifier 722, reaches compensation radio frequency
The purpose of 72 non-linear distortion of transmitter.
Amplifier 722 includes signal amplifier 7221 and power amplifier 7222, signal amplifier 7221 and cartesian ring
Road chip 721 connects, and the signal for exporting to cartesian loop chip 721 carries out voltage amplification；Power amplifier 7222 with
Signal amplifier 7221 connects, and the signal for exporting to signal amplifier 7221 carries out Current amplifier；Furthermore amplifier 722
It can be third stage amplifier, however it is not limited to this.
Cartesian loop chip 721 is made of two accesses of uplink and downlink, and uplink is modulated baseband signal
And it is sent to signal amplifier 7221 and power amplifier 7222；Downlink be by the coupling of coupler 723 1% or thousand/
One uplink signal, then give cartesian loop chip 721 and demodulated；Cartesian loop chip 721 is transmitted across by comparing
The difference for the baseband signal that the baseband signal and demodulation come are got off, then does pre-distortion to uplink baseband signal, to reach
The purpose of linearisation.
Descartes's feedback loop can work tens MHz to the carrier-frequency range of several GHz, modulation bandwidth up to 500kHz,
Distortion suppression is up to 20dB~50dB, and the peak power efficiency of amplifier 722 is up to 35%~65%.Since its is higher linear
Distortion suppression ability, Descartes's feedback loop are widely used in Digital Clustering mobile communication system.
Radio frequency sending set 73 includes zero intermediate frequency chip 731, first filter 732 and second filter 733, local oscillations
Device 74 is for generating orthogonal local oscillation signal, and zero intermediate frequency chip 731 is for being carried out down orthogonal local oscillation signal using Direct-conversion
Frequency conversion is baseband signal.
Wherein, first filter 732 is bandpass filter, and second filter 733 is low-pass filter.
Zero intermediate frequency chip 731 provides a pulsating direct current signal to second filter 733, after second filter 733
Become direct current signal, for controlling local oscillator 74.
Zero intermediate frequency chip 731 includes phase-locked loop (not shown)；Zero intermediate frequency chip 731 locks this using phase-locked loop
Vibration frequency (frequency of oscillation of local oscillator 74), can be used as the frequency source of radio-frequency transmitter 73；Second filter 733 is lock
The loop filter of phase loop；The phase-locked loop does not have loop filter, and external loop filter is needed to provide control electricity
Voltage controlled oscillator in pressure driving phase-locked loop, therefore second filter 733 can be used to the voltage controlled oscillation in phase-locked loop
Device provides control voltage.
Zero intermediate frequency chip 731 further includes frequency divider (not shown), and frequency divider is to be used for except two circuits by orthogonal local oscillation
Signal carries out two divided-frequency.
Radio frequency topological system further includes notch diplexer 75, notch diplexer 75 respectively with antenna 71, radio frequency sending set 72
It is connected with radio-frequency transmitter 73, for handling the first signal/second signal, and by treated, the first signal is transmitted to
Antenna 71 will treated that second signal is transmitted to radio-frequency transmitter 73.
Notch diplexer 75 may include selection switch 751 and third filter 752；Third filter 752 is used for the
One signal or second signal are filtered；Selection switch 751 is transmitted to antenna 71 for the first signal after filtering or will filter
Second signal is transmitted to third filter 752 after wave；The first end of switch 751 is selected to connect antenna by third filter 76
71, it selects the second end of switch 751 to connect radio frequency sending set 72, the third end of switch 751 is selected to connect radio-frequency transmitter 73.
For radio frequency topological system, if transmitting-receiving timesharing carries out, notch diplexer 75 can be a selection switch
With third filter 76；If it is different to receive and dispatch frequency, notch diplexer 75 must have good isolation effect, can be
Low-pass filter allows transmitting signal to be reduced to minimum to the interference for receiving signal.
Radio frequency topological system further includes the digital signal processor 76 connecting with zero intermediate frequency chip 731, zero intermediate frequency chip 731
The baseband signal come will be demodulated and be sent to digital signal processor 76；Digital signal processor 76 may include analog-to-digital conversion electricity
Road (not shown), analog to digital conversion circuit are used to baseband signal being converted to digital signal；Digital signal processor 76 may be used also
Digital signal to be inputted in other circuits or is handled digital signal, such as: sampling, compression, coding etc..
Using the system in the present embodiment, the technical indicator obtained after test is as shown in the table:
Wherein, Frb is the characteristic frequency value of distal end frequency, ACPR (Adjacent Channel Power Ratio, neighbour's letter
Road power ratio) it is the index for characterizing proximal end and being influenced on radio-frequency transmitter 73 in system；ACPR is due to neighboring trace function caused by modulating
Rate ratio, the linearity of the index characterization radio-frequency transmitter 73, and meanwhile it is also related with the phase noise of local oscillation signal；Broadband noise table
What is levied is an index of the influence to distal end.
Because using frequency of oscillation as twice of 71 frequency of antenna of local oscillator 74, and improve in the prior art three
Deterioration (9.5dB) of the frequency multiplier circuit for local oscillation signal, while avoiding using trebling circuit bring phase noise；If with
Trebling circuit is then difficult to ensure in the distal end phase noise of frequency better than -155dBm/Hz；It, can from the data tested
To find out the proximal end target improvement of ACPR, distal end broadband noise also averagely optimizes 1.9dB.
Transmission channel signal is evaded to receiving channel by the response characteristic of the uplink of Descartes's feedback loop
The influence of signal, the response time is fast, and when reception forwarding is penetrated in the relay mode, transmitting signal will not influence the error code for receiving signal
Rate.
By optimizing circuit layout, using to the unwise inductor component of external interference；Avoid the dry of frequency pulling and earth-current
Disturb problem；Twice in antenna opening frequency is directly vibrated with a VCO, orthogonal signalling two is required to using Up/Down Conversion demodulation and divides
Frequency principle has been taken into account and has received and emit the demand to frequency source, avoided complicated sequence control circuit.
The present embodiment provides orthogonal local oscillation signal to radio frequency reception/transmission channel using a local oscillator 74,
It does not need to do frequency error factor in repeater transmitting-receiving conversion process, saves conversion time, while board area is greatly saved
Reduce complete machine cost；And peripheral circuit is greatly reduced, optimized circuit reduces about 200 or more deviding devices
Part；The deterioration of the 9.5dB caused by phase noise using frequency tripler is avoided, and is had to transmitter ACPR and broadband noise bright
Aobvious improvement；The topological structure of topological structure than in the prior art in the present embodiment reduces many element circuits, and cost is big
Width reduces.
It is the structural schematic diagram of one embodiment of communication device provided by the present application, the communication device 80 packet refering to Fig. 8, Fig. 8
Include the radio frequency sending set 81 and radio-frequency transmitter 82 in above-described embodiment radio frequency topological system, for example above-mentioned reality of their specific structure
It applies described in example, details are not described herein.
Unit may or may not be physically separated as illustrated by the separation member, shown as a unit
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.It can select some or all of unit therein according to the actual needs to realize the mesh of present embodiment scheme
's.
In addition, each functional unit in each embodiment of the application can integrate in one processing unit, it can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units.It is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.
The above is only embodiments herein, are not intended to limit the scope of the patents of the application, all to be said using the application
Equivalent structure or equivalent flow shift made by bright book and accompanying drawing content is applied directly or indirectly in other relevant technology necks
Domain similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of radio frequency topological system, which is characterized in that the radio frequency topological system includes at least:
Antenna；
Radio frequency sending set, the radio frequency sending set are connect with the antenna, and for generating the first signal, the radio frequency sending set is logical
It crosses the antenna and emits first signal；
Radio-frequency transmitter, the radio-frequency transmitter are connect with the antenna, for receiving second signal by the antenna；
Local oscillator is connect with the radio frequency sending set and the radio-frequency transmitter respectively, for being the radio frequency sending set
Or the radio-frequency transmitter provides local oscillator orthogonal signalling, the frequency of oscillation of the local oscillator is the frequency of the antenna
Twice；
Wherein, the radio frequency sending set includes zero intermediate frequency chip, and the local oscillator is connect with the zero intermediate frequency chip, described
Zero intermediate frequency chip is used to that the orthogonal local oscillation signal to be down-converted to baseband signal using Direct-conversion.
2. radio frequency topological system according to claim 1, which is characterized in that
The radio-frequency transmitter further includes first filter and second filter, and the first filter is used for second letter
It number is filtered, and filtered signal is supplied to the zero intermediate frequency chip；The second filter is used for in described zero
The control signal of frequency chip is filtered, and filtered control signal is supplied to the local oscillator.
3. radio frequency topological system according to claim 2, which is characterized in that
The first filter is bandpass filter, and the second filter is low-pass filter.
4. radio frequency topological system according to claim 2, which is characterized in that
The zero intermediate frequency chip includes phase-locked loop, and the second filter is the loop filter of the phase-locked loop.
5. radio frequency topological system according to claim 1, which is characterized in that
The zero intermediate frequency chip further includes frequency divider, the frequency divider be except two circuits, for by the orthogonal local oscillation signal into
Row two divided-frequency.
6. radio frequency topological system according to claim 1, which is characterized in that
The radio frequency topological system further includes notch diplexer, and the notch diplexer is used for first signal/described the
Binary signal is handled, and will treated first signal is transmitted to antenna or will treated second letter
It number is transmitted to the radio-frequency transmitter, the notch diplexer includes selection switch and third filter, the third filter
For being filtered to first signal or the second signal, the selection switch is for first signal after filtering
It is transmitted to the antenna or second signal described after filtering is transmitted to the third filter.
7. radio frequency topological system according to claim 1, which is characterized in that
The radio frequency topological system further includes the digital signal processor connecting with the zero intermediate frequency chip, the zero intermediate frequency chip
The baseband signal is sent to the digital signal processor, the digital signal processor is used to turn the baseband signal
It is changed to digital signal.
8. radio frequency topological system according to claim 1, which is characterized in that
The radio frequency sending set includes cartesian loop chip, amplifier and coupler, and the cartesian loop chip described is put
Big device and the coupler form Descartes's feedback loop, and the cartesian loop chip is used to receive the baseband signal,
And to the baseband signal be modulated and up-conversion after be sent to the amplifier, the amplifier to the signal received into
The coupler is sent to after row amplification, and the signal received is handled and is sent to the cartesian ring by the coupler
Road chip is demodulated.
9. radio frequency topological system according to claim 8, which is characterized in that
The amplifier includes signal amplifier and power amplifier, and the signal amplifier is used for the cartesian loop core
The signal of piece output carries out voltage amplification, and the signal that the power amplifier is used to export the signal amplifier carries out electric current
Amplification.
10. a kind of communication device, which is characterized in that including in radio frequency topological system as claimed in any one of claims 1-9 wherein
Radio-frequency transmitter and radio frequency sending set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822097137.XU CN209218087U (en) | 2018-12-13 | 2018-12-13 | A kind of radio frequency topological system and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201822097137.XU CN209218087U (en) | 2018-12-13 | 2018-12-13 | A kind of radio frequency topological system and communication device |
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| CN111447035A (en) * | 2020-04-23 | 2020-07-24 | 紫光展锐(重庆)科技有限公司 | Adjacent channel interference suppression method and related equipment |
| CN112034767A (en) * | 2020-09-16 | 2020-12-04 | 重庆理工大学 | Antenna distributed intelligent experimental island electrical topology identification system and antenna parameter measurement and control method |
| CN113162672A (en) * | 2021-04-09 | 2021-07-23 | 北京北交信通科技有限公司 | Wireless shunting system based on diversity reception and common-frequency relay and use method thereof |
| CN114598351A (en) * | 2021-09-30 | 2022-06-07 | 深圳市汇顶科技股份有限公司 | Transceiver circuit and transceiver system |
| CN115065373A (en) * | 2022-04-21 | 2022-09-16 | 海能达通信股份有限公司 | Multi-slot transceiver and multi-slot communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111447035A (en) * | 2020-04-23 | 2020-07-24 | 紫光展锐(重庆)科技有限公司 | Adjacent channel interference suppression method and related equipment |
| CN112034767A (en) * | 2020-09-16 | 2020-12-04 | 重庆理工大学 | Antenna distributed intelligent experimental island electrical topology identification system and antenna parameter measurement and control method |
| CN113162672A (en) * | 2021-04-09 | 2021-07-23 | 北京北交信通科技有限公司 | Wireless shunting system based on diversity reception and common-frequency relay and use method thereof |
| CN114598351A (en) * | 2021-09-30 | 2022-06-07 | 深圳市汇顶科技股份有限公司 | Transceiver circuit and transceiver system |
| CN114598351B (en) * | 2021-09-30 | 2023-08-25 | 深圳市汇顶科技股份有限公司 | Transceiver circuit and system |
| CN115065373A (en) * | 2022-04-21 | 2022-09-16 | 海能达通信股份有限公司 | Multi-slot transceiver and multi-slot communication method |
| WO2023201649A1 (en) * | 2022-04-21 | 2023-10-26 | 海能达通信股份有限公司 | Multi-slot transceiver and multi-slot communication method |
| CN115065373B (en) * | 2022-04-21 | 2023-12-12 | 海能达通信股份有限公司 | Multi-slot transceiver and multi-slot communication method |
| CN116405025A (en) * | 2023-03-30 | 2023-07-07 | 上海物骐微电子有限公司 | Local oscillation signal generating circuit, local oscillation signal generating method and wireless communication system |
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