CN102361438B - A kind of method and device for improving drive capability of local oscillator - Google Patents
A kind of method and device for improving drive capability of local oscillator Download PDFInfo
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- CN102361438B CN102361438B CN201110241286.9A CN201110241286A CN102361438B CN 102361438 B CN102361438 B CN 102361438B CN 201110241286 A CN201110241286 A CN 201110241286A CN 102361438 B CN102361438 B CN 102361438B
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- local oscillation
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- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/10—Distribution of clock signals, e.g. skew
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Abstract
The invention discloses a kind of method and device for improving drive capability of local oscillator, it is related to the local oscillator actuation techniques of moving communicating field.Methods described includes：Local oscillation signal of the selection suitable for current application scene from the local oscillation signal of multiple local vibration sources output；Power amplification is carried out to selected local oscillation signal；Multiple signals of the constant amplitude with phase will be divided into by the local oscillation signal of power amplification, and be respectively supplied to multiple frequency converters.Using the present invention, under certain local oscillation signal dynamically input, it is capable of the local oscillation signal of output multi-channel fixation, meets the level demand that frequency converter drives to local oscillator.
Description
Technical field
The present invention relates to moving communicating field, more particularly to a kind of method for improving drive capability of local oscillator and its correlation are filled
Put.
Background technology
With the development of communication career, the multimode application of product and the increase of product support carrier frequency number have become and lead at present
The main design goal of news technology, the driving force of the local oscillator link for bringing therewith is also required to meet new application requirement.At present
Used with merging for other communications regimes for LTE (Long Time Evolution, Long Term Evolution), in RF hardware part
Circuit design in, the switching of local oscillator and share as transceiver design key point.For this problem, traditional design makes
Bill of material switching mode, although too many without increasing in terms of transceiver cost, but the complexity of material list management is caused,
The increase of PCB (Printed Circuit Board, printed circuit board (PCB)) area and design complexities, reduce what product was used
Flexibility.After renewal, design uses the local oscillator handover scheme of software merit rating, but solve only the problem of material list switching, but increases
The security risk problem for having added the design complexities of standby local oscillator drive circuit and having brought therewith.
In face of fierce market competition, it is desirable to the application switching of different communications regimes is realized using software merit rating, this is completed
Vibration source input signal size have differences under frequency conversion drive, while meeting multichannel application.With carrying for device designed capacity
Rise, high integration has become a kind of trend, the quality of product, reliability, competitive advantage, while also strong branch can not only be improved
Hold hardware and software platform design.With reference to highly integrated technology popularization, it is necessary to be directed to the characteristics of demand of local oscillation circuit, solve current transceiver
Produced problem in local oscillator application.
The content of the invention
It is an object of the invention to provide a kind of method and device for improving drive capability of local oscillator, local oscillator can be preferably solved
Source input signal size have differences under frequency conversion drive problem.
According to an aspect of the present invention, a kind of method of improvement drive capability of local oscillator that the present invention is provided includes：
A) local oscillation signal of the selection suitable for current application scene from the local oscillation signal of multiple local vibration sources output；
B power amplification) is carried out to selected local oscillation signal；
C multiple signals of the constant amplitude with phase) will be divided into by the local oscillation signal of power amplification, and is respectively supplied to multiple frequency conversions
Device.
The step A) it is specially：
According to current application scene, the local oscillation signal from multiple local vibration sources is selected using signal selection module.
The step B) it is specially：
Enter Mobile state saturation point to selected local oscillation signal using power amplifier module to control, be fixed putting for output
Big local oscillation signal.
Perform the step B) after, also improve step including harmonic wave, specially：
Using harmonic rejection module, treatment will be filtered by the local oscillation signal harmonic wave of power amplification.
The step C) it is specially：
Local oscillation signal is divided into multiple signals of the constant amplitude with phase using power distribution module, the power distribution module has
Multiple output ports, the multiple signals are supplied to frequency converter by multiple output ports.
According to application scenarios, the multiple output port is connected into corresponding frequency converter, be not connected with the output end of frequency converter
Mouth is via resistance-grounded system.
According to another aspect of the present invention, a kind of device of improvement drive capability of local oscillator that the present invention is provided includes：
Signal selection module, for selecting the selection from the local oscillation signal of multiple local vibration sources output to be applied to current application scene
Local oscillation signal；
Power amplifier module, for carrying out power amplification to selected local oscillation signal；
Power distribution module, for will be divided into multiple signals of the constant amplitude with phase by the local oscillation signal of power amplification, and divides
Indescribably supply multiple frequency converters.
Described device also includes：
Harmonic rejection module, for treatment will to be filtered by the local oscillation signal harmonic wave of power amplification.
The power distribution module has multiple output ports that multiple output signals are provided to frequency converter.
The multiple output port connects corresponding frequency converter, and the output port of not connected frequency converter connects via resistor
Ground.
Compared with prior art, the beneficial effects of the present invention are：
The present invention can export the multichannel for the meeting transducer drive requirement letter of stabilization under local oscillation signal dynamically input
Number, and save PCB costs and device cost by improving device integration, so as to improve transceiver cost advantage and
Product reliability.
Brief description of the drawings
Fig. 1 is a kind of method flow diagram of improvement drive capability of local oscillator that the present invention is provided；
Fig. 2 is a kind of device block diagram of improvement drive capability of local oscillator that the present invention is provided；
Fig. 3 is the flow chart of customization Fig. 2 described devices that the present invention is provided；
Fig. 4 is a kind of device block diagram for improving drive capability of local oscillator provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram that the present invention provided in an embodiment of the present invention is applied to FDD system；
Fig. 6 is the schematic diagram that the present invention provided in an embodiment of the present invention is applied to TDD system.
Specific embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below is excellent
Select embodiment to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 1 shows a kind of method flow diagram of improvement drive capability of local oscillator of present invention offer, as shown in figure 1, step
Including：
Step 101：Local oscillation signal of the selection suitable for current application scene from the local oscillation signal of multiple local vibration sources output.
Specifically, according to current application scene, the local oscillation signal from multiple local vibration sources is selected using signal selection module.
Step 102：Power amplification is carried out to selected local oscillation signal.Specifically, using power amplifier module to institute
The local oscillation signal of selection enters the control of Mobile state saturation point, is fixed the local oscillation signal of the amplification of output.
Step 103：Multiple signals of the constant amplitude with phase will be divided into by the local oscillation signal of power amplification, and be respectively supplied to many
Individual frequency converter.Specifically, local oscillation signal is divided into multiple signals of the constant amplitude with phase, the power point using power distribution module
There are multiple output ports with module, the multiple signals are supplied to frequency converter by multiple output ports.According to application scenarios,
The multiple output port is connected into corresponding frequency converter, the output port of frequency converter is not connected with via resistance-grounded system.
After performing above-mentioned steps 102, harmonic rejection module can also be utilized, by by the local oscillation signal harmonic wave of power amplification
Treatment is filtered, step 103 is then performed.
Fig. 2 shows a kind of device block diagram of improvement drive capability of local oscillator of present invention offer, as shown in Fig. 2 device bag
Include：
Signal selection module, for selection in the local oscillation signal that is exported from multiple local vibration sources suitable for current application scene
Local oscillation signal；
Power amplifier module, for carrying out power amplification to selected local oscillation signal；
Power distribution module, for will be divided into multiple signals of the constant amplitude with phase by the local oscillation signal of power amplification, and divides
Indescribably supply multiple frequency converters；
Harmonic rejection module, for treatment will to be filtered by the local oscillation signal harmonic wave of power amplification.
Above-mentioned power distribution module has multiple output ports that multiple output signals are provided to frequency converter, the multiple defeated
Exit port connects corresponding frequency converter, is not connected with the output port of frequency converter via resistance-grounded system.
Fig. 3 shows the flow chart of customization Fig. 2 described devices of present invention offer, as shown in figure 3, being driven to improve local oscillator
The quantity that the scope and local oscillator of level drive, under certain local oscillation signal dynamically input, exports fixed local oscillation signal, meets
Support that n (n ＞ 2) road local oscillator drives fan-out capability, customizes of the present invention while the level demand that frequency converter drives to local oscillator
Device needs to consider following steps：
Step 301：Quantitative requirement, the size requirements of drive level, the harmonic wave driven to local oscillator according to GSM
The size requirements of suppression determine that device of the present invention needs the performance indications for meeting.
Step 302：In view of the frequency range application of different systems, by CDMA (Code Division Multiple
Access, CDMA), LTE, UMTS (Universal Mobile Telecommunications System, General Mobile
Communication system), the work of GSM (Global System of Mobile communication, global system for mobile communications) frequently
Duan Jinhang classifying rationallies, the segmentation covering as far as possible in the case where current technology cannot support communication full frequency band application difficult,
Realize the wideband covering of communications regime different frequency range.In other words, the working frequency range of current communication field mainly covers 400MHz
The scope of~4000MHz, in actual applications can be because of cost, and the limitation of size, technique etc. cannot meet frequency range so wide
Covering, it is therefore desirable to carry out frequency partition according to current applicable cases, is realized wide by the device of more than 2 of pin compatibility
Frequency range is covered.
Step 303：Value volume and range of product according to local vibration source used in transceiver application carries out signal input quantity really
It is fixed.That is, actual local vibration source quantity is determined according to application requirement, so that the clear and definite present apparatus is needed to how many local vibration sources
Carry out signal driving treatment.
Step 304：Determine that the local oscillator being actually needed drives quantity according to application requirement, so that the clear and definite present apparatus needs to support
The local oscillator on how many road drives output.The local oscillator needed according to system drives quantity to select suitable distribution of power module, for temporary
When do not require output part be grounded using resistors match.
Step 305：The level requirement of the driving of the level scope and output of the local vibration source according to input, point
Analysis power amplifier module needs performance requirement.Drive the power attenuation that quantity is introduced different due to different local oscillators, it is necessary to letter
The power attenuation of number selecting module and power distribution module confirms that the gain and saturation output of amplification module are required after being adjusted,
It is required that under the conditions of given input unlike signal size, exporting each same phase of road signal constant amplitude.
Step 306：If device needs the performance for meeting it has been determined that meeting the device of above performance it is achieved that having
There is feasibility, then perform step 307, otherwise perform step 301, the performance met with redefining device to need.That is,
, it is necessary to assess the performance whether current designed capacity can be realized requiring after device performance determines, the difficulty or ease for realizing device are considered
Degree, the customizing device after balance is adjusted.
Step 307：Customize device of the present invention.
Fig. 4 shows a kind of device block diagram for improving drive capability of local oscillator provided in an embodiment of the present invention, as shown in figure 4,
Device includes signal selection module, power amplifier module, power distribution module harmonic suppression module.
The signal selection module, the local oscillation signal of the varying level for being provided for different application scenarios is selected
Select；
The power amplifier module, for selected local oscillation signal to be amplified into treatment, while passing through work saturation
The characteristics of control of point fixes output to realize that a range of local oscillation signal input is lower is to meet frequency converter to drive level
It is required that；
The power distribution module, for the local oscillation signal of enhanced processing to be divided into n road signal output of the constant amplitude with phase, makes
User can according to actual needs outside matching by way of select n roads in it is any all the way or a few roads export；
The harmonic rejection module, by way of the external port of wave filter, can support external filters, improve design
Flexibility.
The present apparatus also includes external interface, and the external interface includes signal input port, signal output port, feeder ear
Mouth and control port.
It is attached according to the integrated connected mode of radio frequency chip between each module of the present apparatus, in the application can be flexible
Part of module is used alone, you can used as amplifier, it is also possible to used as power splitter.
In the present embodiment, from two local oscillation signals of different local vibration sources respectively by signal input port L0_IN1 and
L0_IN2 is input into device, the signal selection module according to the control signal from control port SWITCHCONTROL, from
The local oscillation signal all the way suitable for current application scene is selected in two-way local oscillation signal.The power amplifier module is full by work
With the control of point, level local oscillation signal within the specific limits is set to be fixed by output level size after power amplification, with
Meet requirement of the frequency converter to drive level.By the local oscillation signal after power amplification harmonic wave suppression is carried out by harmonic rejection module
After system, send to power distribution module.Power distribution module will be divided into 8 road signals by the local oscillation signal of harmonics restraint, and divide
Frequency converter is not supplied to by 8 signal output port L0_OUT1-L0_OUT8.
Harmonic rejection module is by way of the external port of wave filter in the present embodiment, external low pass filter LPF.
Fig. 5 shows that the present invention provided in an embodiment of the present invention is applied to FDD (Frequency Division
Duplexing, FDD) system schematic diagram, as shown in Figure 5.There are following two application scenarios in FDD practical applications：
The first：Two local vibration sources connect a device of the present invention respectively, realize that two groups of local oscillators drive.
Second：By using device of the present invention, the selection of the local oscillation signal from different local vibration sources is realized, realized
One local vibration source supports that two groups of local oscillators drive simultaneously.
Furtherly, device 1 receives the local oscillation signal from local vibration source 1 by its signal input port L0_IN1；Device 2
Local oscillation signal from local vibration source 1 is received by its signal input port L0_IN1, and by its signal input port L0_IN2
Receive the local oscillation signal from local vibration source 2.Under the first application scenarios, device 2 is set to select the local oscillation signal from local vibration source 2
It is capable of achieving；Under second application scenarios, device 2 is set to select the local oscillation signal from local vibration source 1 to be capable of achieving.Two kinds of applications
Scene does not change the hardware design of FDD system, only passes through software merit rating.
In, multichannel local oscillator is realized by using the device invented and drives output, while realizing different local vibration sources
Selection, for two level differences of the local oscillation signal of local vibration source be (- 10~0) dBm, with present apparatus Larger Dynamic be input under
The characteristics of fixed output, disclosure satisfy that the 5dBm signal levels output of stabilization is required.
Current device supports the output of n (n ＞ 2) road, and bypass selection can be as needed carried out in practical application less than n roads
Any output, while work(point extension output quantity can be increased on the basis of this device.
In different system applications, flexibly can carry out link design using harmonic rejection module and meet requirement,
Treatment can be filtered to the local oscillation signal by power amplification as needed, the step of to suppress harmonic wave, filtering process
Can be realized by way of external filters.
Fig. 6 show the present invention provided in an embodiment of the present invention be applied to TDD (Time Division Duplexing, when
Point duplex) system schematic diagram, as shown in fig. 6, the time sharing shared local vibration source of receiver and sender of TDD system.Using this dress
Put, it is possible to achieve the multichannel local oscillator of multichannel transmitting and receiving system drives.In actual applications, due to the local oscillation signal of the reception of device 2
The characteristics of there is larger cabling to be lost after holding wire, lower fixed output is input into using present apparatus Larger Dynamic, can realize
The requirement that frequency converter 0dBm local oscillators drive, while in different system applications, flexibly can be entered using harmonic rejection module
Line link designs to meet requirement.
In sum, the present invention has following technique effect：
1st, the present invention can export the multichannel for the meeting transducer drive requirement letter of stabilization under local oscillation signal dynamically input
Number.
2nd, while the present invention improves device integration by integrated technology, PCB costs and device cost, drop are saved
The complexity of low design, improves the cost advantage of transceiver to a certain extent, improves the reliability of product.
Although being described in detail to the present invention above, the invention is not restricted to this, those skilled in the art of the present technique
Various modifications can be carried out with principle of the invention.Therefore, all modifications made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (10)
1. it is a kind of improve drive capability of local oscillator method, it is characterised in that including：
A) local oscillator of the selection suitable for current application scene from multiple local oscillation signals of the varying level of multiple local vibration sources output
Signal；
B power amplification) is carried out to selected local oscillation signal using power amplifier module, obtains believing by the local oscillator of power amplification
Number；
C) constant amplitude will be divided into and with the multiple signals of phase by the local oscillation signal of power amplification using power distribution module；
D the constant amplitude that) the is divided into power distribution module and multiple signals with phase are respectively supplied to multiple frequency converters.
2. method according to claim 1, it is characterised in that the step A) it is specially：
According to current application scene, using signal selection module to multiple local oscillation signals of the varying level from multiple local vibration sources
Selected.
3. method according to claim 1, it is characterised in that the step B) it is specially：
Enter Mobile state saturation point to selected local oscillation signal using power amplifier module to control, be fixed the amplification of output
Local oscillation signal.
4. method according to claim 3, it is characterised in that in the step B) afterwards with the step C) before, also wrap
Including harmonic wave improves step, specially：
Using harmonic rejection module, treatment will be filtered by the local oscillation signal harmonic wave of power amplification.
5. the method according to claim 1-4 any one, it is characterised in that the step D) it is specially：
The power distribution module has multiple output ports, and the multiple signals are supplied to frequency conversion by multiple output ports
Device.
6. method according to claim 5, it is characterised in that according to application scenarios, by the connection of the multiple output port
Corresponding frequency converter, is not connected with the output port of frequency converter via resistance-grounded system.
7. it is a kind of improve drive capability of local oscillator device, it is characterised in that including：
Signal selection module, is applied to current for selection in multiple local oscillation signals of the varying level exported from multiple local vibration sources
The local oscillation signal of application scenarios；
Power amplifier module, for carrying out power amplification to selected local oscillation signal, obtains believing by the local oscillator of power amplification
Number；
Power distribution module, for by the local oscillation signal of power amplification constant amplitude will to be divided into and with the multiple signals of phase；
Multiple frequency converters, for receiving constant amplitude that the power distribution module is divided into respectively and with the multiple signals of phase.
8. device according to claim 7, it is characterised in that also include：
Harmonic rejection module, for treatment will to be filtered by the local oscillation signal harmonic wave of power amplification.
9. the device according to claim 7 or 8, it is characterised in that the power distribution module has and provided to frequency converter
Multiple output ports of multiple output signals.
10. device according to claim 9, it is characterised in that the multiple output port connects corresponding frequency converter, not
The output port of frequency converter is connected via resistance-grounded system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110241286.9A CN102361438B (en) | 2011-08-22 | 2011-08-22 | A kind of method and device for improving drive capability of local oscillator |
| PCT/CN2011/084668 WO2012152030A1 (en) | 2011-08-22 | 2011-12-26 | Method and device for handling local oscillation signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110241286.9A CN102361438B (en) | 2011-08-22 | 2011-08-22 | A kind of method and device for improving drive capability of local oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102361438A CN102361438A (en) | 2012-02-22 |
| CN102361438B true CN102361438B (en) | 2017-05-31 |
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| CN201110241286.9A Active CN102361438B (en) | 2011-08-22 | 2011-08-22 | A kind of method and device for improving drive capability of local oscillator |
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| Country | Link |
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| CN (1) | CN102361438B (en) |
| WO (1) | WO2012152030A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882474B (en) * | 2012-09-29 | 2016-01-13 | 西安空间无线电技术研究所 | A kind of frequency mixer and suppressing method thereof with high-order harmonic wave rejection ability |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1406087A (en) * | 2001-09-11 | 2003-03-26 | 三星电子株式会社 | Base-station system of supporting multi-section/multi-frequency distribution for gapless calling service |
| CN101400094A (en) * | 2007-09-29 | 2009-04-01 | 大唐移动通信设备有限公司 | Radio-frequency information transceiving device and user equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548839A (en) * | 1994-10-14 | 1996-08-20 | Caldwell; Stephen P. | Wide band radio-frequency converter having multiple use of intermediate frequency translators |
| CN201114052Y (en) * | 2007-06-06 | 2008-09-10 | 安徽四创电子股份有限公司 | Ku double local oscillation multi-output system |
| TW200935719A (en) * | 2008-02-05 | 2009-08-16 | Rafael Microelectronics Inc | Multi-band VCO |
| CN201830256U (en) * | 2010-06-24 | 2011-05-11 | 大唐移动通信设备有限公司 | Multi-channel receiver device |
-
2011
- 2011-08-22 CN CN201110241286.9A patent/CN102361438B/en active Active
- 2011-12-26 WO PCT/CN2011/084668 patent/WO2012152030A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1406087A (en) * | 2001-09-11 | 2003-03-26 | 三星电子株式会社 | Base-station system of supporting multi-section/multi-frequency distribution for gapless calling service |
| CN101400094A (en) * | 2007-09-29 | 2009-04-01 | 大唐移动通信设备有限公司 | Radio-frequency information transceiving device and user equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012152030A1 (en) | 2012-11-15 |
| CN102361438A (en) | 2012-02-22 |
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