CN109286407A - The method that interference signal inhibits device and inhibited to high reject signal - Google Patents
The method that interference signal inhibits device and inhibited to high reject signal Download PDFInfo
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- CN109286407A CN109286407A CN201811389262.6A CN201811389262A CN109286407A CN 109286407 A CN109286407 A CN 109286407A CN 201811389262 A CN201811389262 A CN 201811389262A CN 109286407 A CN109286407 A CN 109286407A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B2001/1045—Adjacent-channel interference
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Abstract
The invention discloses a kind of interference signals to inhibit device, including low noise amplification module, signal conversion module, signal processing module and power amplifier module；The radiofrequency signal of input is after the processing of low noise amplification module, signal processing module and signal conversion module, then amplifies via power amplifier module and export；Signal conversion module is used to carry out gain control to the signal inputted by low noise amplification module, the second conversion process output is carried out to power amplifier module to signal the first conversion process output of progress after gain control to signal processing module, and to the signal of signal processing module output；Signal processing module carries out gain control for controlling signal conversion module, and carries out gain compensation processing to the signal after the first conversion process.The present invention also provides the methods inhibited to high reject signal.The communication quality of network communication equipment can be improved in apparatus and method of the present invention, improves the reliability of communication system, and can achieve the effect for expanding communication system applications scene.
Description
Technical field
Inhibit device the present invention relates to network communication technology field more particularly to a kind of interference signal and to high reject signal
The method inhibited.
Background technique
With the rapid development of the communication technology, the frequency spectrum resource of communication is more and more nervous, since frequency spectrum is more next in use
It is more intensive, duplexer, dielectric filter usually can be used to the inhibition of the special frequency channel interference signal in frequency spectrum use process
Equal passive devices are filtered out.In general, passive device is easier to meet when requiring the inhibition with outer 5MHz, 10MHz etc.
Design, but when the frequency range to be inhibited is very close apart from useful frequency range, for example with outer 2.5MHz etc., will cause to useful communication
The strong jamming of frequency range generates network call drop, or even the situation being not turned on, seriously affects communication quality.
Summary of the invention
For inhibiting there are the drawbacks described above of strong jamming and serious communication quality defect for adjacent band, inventor, which passes through, to be ground
Study carefully discovery the reason of leading to the above problem be since the intermediate zone of used passive filtering device is relatively gentle,
When being used for inhibiting the interference of adjacent band, more serious signal leakage will lead in filtering, and then cause
ADC sampling link power is excessive, causes useful signal to be compressed, causes the strong jamming to useful communications band.
Based on this, inventor expects if can seek to a kind of mode to carry out balanced passive filter in signal process of inhibition
Perhaps, the relatively gentle characteristic of wave device itself intermediate zone, just can solve problem.Based on the thinking, inventor is by repeatedly
Test and trial, finally seek to a solution: changing the conventional thought that is filtered in the analog signal stage,
The digital signal stage is also filtered, and can effectively filter out the interference of adjacent band.But only by the filtering in analog signal stage
All to be changed to the filtering in digital signal stage merely be necessarily also of problems, for example, may when signal is abnormal,
There are the serious problems such as back end signal spilling.Thus, inventor has finally determined by trial many times in conjunction with analog signal
The filtering of the filtering in stage and digital stage, while gain control and compensation is added, to realize that (i.e. frequency range is non-to high reject signal
Often neighbouring interference signal) effective inhibition.The objective of the program is: effectively being filtered to the interference signal outside communication band
On the basis of removing, by detecting the attenuation of front end attenuator, gain compensation is carried out to useful inband signaling, is realized to useful letter
Number effective recovery, to achieve the purpose that filter out high reject signal, ensure communication.Based on this thinking, the present invention proposes one
The method that kind interference signal inhibits device and high reject signal to be inhibited meets the needs of more users into overcome drawback,
The communication quality for improving each network communication equipment, improves the reliability of communication system, and may be implemented to expand communication system work
Using the effect of context.
In a first aspect, the embodiment of the invention provides a kind of interference signals to inhibit device, including low noise amplification module, letter
Number conversion module, signal processing module and power amplifier module；The radiofrequency signal of input is through low noise amplification module, signal processing module
After signal conversion module processing, then amplifies via power amplifier module and export；Signal conversion module is used for by low noise amplification mould
The signal of block input carries out gain control, carries out the first conversion process output to signal processing mould to the signal after gain control
Block, and the second conversion process output is carried out to power amplifier module to the signal of signal processing module output；Signal processing module is used
Gain control is carried out in control signal conversion module, and gain compensation processing is carried out to the signal after the first conversion process.
In the technical solution of the embodiment of the present invention, the radiofrequency signal of input can be filtered by low noise amplification module
And have the function of amplified signal, subsequent signal processing can be made more accurate, excluded the interference signal；Attenuation units
The gain of the radiofrequency signal of input can effectively be adjusted；Signal processing module effectively can carry out gain to the signal of input
It controls and makes corresponding compensation deals；Power amplifier module can signal amplifies and to output signal filtering, guarantor by treated
The signal of card output meets expectation power grade and is limited in desired communication band, avoids generating interference to other frequency ranges.By
This realizes the gain control completed based on power detection to radiofrequency signal by the setting signal processing module in inhibiting device
The case where making and being controlled according to gain carries out gain compensation, the i.e. technical solution of the embodiment of the present invention to the signal after conversion
During carrying out signal conversion processes, also according to input radiofrequency signal and treated thermal compensation signal it is real-time right
Than having carried out real-time compensation to link gain, the high reject signal realized outside to communication band effectively filters out, and to useful
Signal is effectively restored, so as to achieve the effect that ensure communication.
Second aspect, the present invention also provides the methods inhibited to high reject signal, comprising:
The radiofrequency signal received is filtered and low noise is handled, obtains meeting expected second signal；
Gain control is carried out to second signal, obtains third signal；
First conversion process is carried out to third signal, obtains fourth signal；
Gain compensation processing is carried out to fourth signal, obtains the 5th signal；
Second conversion process is carried out to the 5th signal, obtains radio frequency analog signal；
To radio frequency analog signal be filtered and enhanced processing after export.
This method carries out gain control to filtering and low noise treated radiofrequency signal, believes the number after analog-to-digital conversion
It number is filtered and is based on gain control and carry out gain compensation, not only realized the filtering using passive device to analog signal, but also
The secondary filtering to digital signal is realized, while gain compensation is also carried out based on gain control, is realized to received effective
Signal carries out gain recovery, overcomes since the strong jamming of useful communications band is bad caused by the decaying of useful signal, mentions
High communication quality.
Detailed description of the invention
Fig. 1 is that the interference signal of one embodiment of the present invention inhibits device principle block diagram；
Fig. 2 is that the interference signal of another embodiment of the present invention inhibits the functional block diagram of device；
Fig. 3 is the method flow diagram inhibited to high reject signal of an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
In addition it is also necessary to explanation, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise", not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including described want
There is also other identical elements in the process, method, article or equipment of element.
Fig. 1 schematically shows that the interference signal of one embodiment of the present invention inhibits device principle block diagram, such as Fig. 1 institute
Show, it includes low noise amplification module 2, signal conversion module 3, signal processing module 4 and power amplifier mould which, which inhibits device 1,
Block 5, low noise amplification module 2 are connect with signal conversion module 3, signal conversion module 3 respectively with signal processing module 4 and power amplifier
Module 5 connects.Wherein, low noise amplification module 2 is for receiving the radiofrequency signal for being input to device, to the radiofrequency signal of input into
Row filtering and signal enhanced processing, and pure radiofrequency signal is input to signal conversion module 3 by treated.Signal conversion
Module 3 is mainly used for completing the conversion to the radiofrequency signal of input, including analog-to-digital conversion (i.e. the first conversion process) and digital-to-analogue turn
Change (i.e. the second conversion process).Signal processing module 4 then for completing processing to digital signal, including gain control processing with
Gain compensation processing mainly carries out gain control processing and is increased after signal conversion module 3 carries out the first conversion process
Beneficial compensation deals carry out the inhibition purpose of interference signal in digital signal level to reach, overcome traditional passive filter
Part can not effectively filter out the drawbacks of high reject signal of adjacent band.And power amplifier module 5 is then for 3 He of inlet signal conversion module
The amplification of the radiofrequency signal exported after the processing of signal processing module 4 and the filtering of output signal, to guarantee that the device is finally defeated
Signal out meets expectation power grade and is limited in desired communication band, to effectively avoid producing the signal of other frequency ranges
Raw interference.
As shown in Figure 1, signal conversion module 3 is embodied as including for adjusting input gain as exemplary embodiment
Attenuation units 301 are connect with signal processing module 4, are carried out according to the attenuation that signal processing module 4 determines to link gain
Control, to avoid the spilling of signal at ADC interface.Wherein, signal processing module 4 carries out first turn according to signal conversion module 3
The power for digital signal of changing that treated, control attenuation units 301 carry out gain control to the signal of input signal conversion module 3
System.Signal conversion module 3 is carrying out gain control to the radiofrequency signal inputted by low noise amplification module by attenuation units 301
After processing, then can to gain control after signal carry out the first conversion process, be converted into numeric field intermediate-freuqncy signal, i.e., into
The down coversion of row radiofrequency signal to intermediate-freuqncy signal changes, and later, signal conversion module 3 is by the intermediate-freuqncy signal after the first conversion process
Output to signal processing module 4 carries out gain compensation processing.Signal processing module 4 carries out gain compensation processing to intermediate-freuqncy signal
Afterwards, can will treated that intermediate-freuqncy signal returns to signal conversion module 3, at this moment, signal conversion module 3 can carry out second to signal
Intermediate-freuqncy signal is converted to radio frequency analog signal by conversion process, i.e. the up-conversion of realization intermediate-freuqncy signal to radio frequency analog signal becomes
Change.Later, signal conversion module 3 exports radio frequency analog signal to power amplifier module 5, completes radiofrequency signal by power amplifier module 5
The filtering for being amplified to desired power grade and output signal, guarantee device output signal meet expectation power grade simultaneously limit
It is scheduled in desired communication band, avoids generating interference to other frequency ranges.
As shown in Figure 1, signal conversion module 3 further includes that Date Conversion Unit 302 and filtering are single as exemplary embodiment
Member 303, Date Conversion Unit 302 is connect with attenuation units 301, signal processing module 4 and power amplifier module 5 respectively, receiving attenuation
Gain control treated the radiofrequency signal that unit 301 inputs, after being handled, to the output of power amplifier module 5 treated radio frequency
Analog signal.Wherein, the signal that Date Conversion Unit 302 is used to export attenuation units 301 carries out (i.e. first turn of analog-to-digital conversion
Change processing), the ADC interface unit 401 of output intermediate-freuqncy signal to signal processing module 4, and the DAC of signal processing module 4 is connect
The signal that mouth unit 404 exports carries out digital-to-analogue conversion (i.e. the second conversion process), output radio frequency analog signal to filter unit
303.Wherein, Date Conversion Unit 302 specifically can be implemented as include for carries out the ADC converting member of the first conversion process with
For carrying out the DAC converting member of the second conversion process, ADC converting member respectively with attenuation units 301 and ADC interface unit
401 connections, DAC converting member connect with DAC interface unit 402 and filter unit 303 respectively, filter unit 303 then with power amplifier
Module 5 connects.After filter unit 303 is used to be filtered radio frequency analog signal, signal is exported to power amplifier module 5,
After setting filter unit 303 can be to avoid 404 exception of DAC interface unit, the frequency spectrum diffusion of generation, while can also be to subsequent
Power amplifier module 5 carry out certain protective effect.
Illustratively, the ADC converting member for carrying out the first conversion process can be implemented as radio frequency sampling chip, carry out second
The DAC converting member of conversion process can be implemented as radio frequency conversion chip, such as AD9361, and penetrating for other models can also be used certainly
Frequency sampling/conversion chip.
In addition, filter unit 303 is filtered the radio frequency analog signal after the second conversion process, after converting
The radio frequency analog signal of output is limited in predetermined band, avoid in up-conversion process data occur it is abnormal lead to frequency spectrum diffusion and
There is back end link abnormal.Illustratively, which can be implemented as SAW (SAW filter).
Wherein, as shown in Figure 1, illustratively, signal processing module 4 is embodied as including ADC interface unit 401, interference suppression
Unit 402, link control unit 403 and DAC interface unit 404 processed.
ADC interface unit 401 is used to receive the intermediate-freuqncy signal of ADC converting member, converts to intermediate-freuqncy signal, obtains interior
The available effective digital signal in portion, and according to the power of effective digital signal, attenuation units 301 are controlled to via low noise amplification
The radiofrequency signal that module 2 is input to attenuation units 2 carries out gain control, and determines that gain reduction amount is exported to link and control list
Member 403.Wherein, internal available effective digital signal refers to converted according to the agreement of agreement after obtained digital signal,
The digital signal can be effectively recognized in the device link, and the agreement of agreement is, for example, JESD204B agreement.Specific real
Now, ADC interface unit 401 can be connect with the ADC converting member of attenuation units 301 and Date Conversion Unit 302 respectively,
It obtains signal from the ADC converting member of Date Conversion Unit 302, and is converted into the signal of input according to JESD204B agreement
Internal available effective digital signal data, and peak values in real time power detection is carried out to the signal, be implemented as passing through by
The power of the effective digital signal is compared with predetermined threshold value when equipment rated power, when the power of digital signal is greater than
When threshold value, control front-end digital attenuation units 301 decay to signal, and control signal one by attenuation units 301
Directly threshold value or threshold value are decayed to hereinafter, and attenuation (i.e. gain reduction amount) at this time is transmitted to link control module
403, in case being used in gain recovery.
AF panel unit 402 is for carrying out interference filter to the effective digital signal after 401 conversion process of ADC interface unit
Except handle and determine whether to filter out interference after signal carry out gain adjustment.Illustratively, AF panel unit 402 can be real
It is now that the shaping filter element 4021 for including and power calculation element 4022 are completed, shaping filter member 4021 is for ADC interface
Digital signal after 401 conversion process of unit carries out shaping filter processing；Power calculation element 4022 is used for according to shaping filter
The changed power of front and back signal generates gain indication signal and exports to link control unit.Integer filter element 4021 is embodied as
Intermediate zone digital filter of good performance, can filter out the interference signal of passband edge, and implementation can be broadband
Integer filtering, be also possible to the filtering of carrier type, but its property, function are consistent, be filter out interference restore useful signal, because
This, the filter that can be realized the said function being filtered to digital signal is all considered as in conception range of the invention, this reality
It is no longer exhaustive to apply example.The digital signal inputted by ADC interface unit 401 is subjected to shaping filter by shaping filter element 4021
Wave is realized and is filtered by intermediate zone digital filter of good performance to the digital signal after conversion, is able to solve existing
Some passive devices can not effectively filter out the defect of high reject signal.Power calculation element 4022 passes through to by integer filter element
Signal before and after 4021 integers carry out power detection generate the exemplary realization of gain indication signal can be with are as follows: calculate shaping filter
The digital power signal of front and back is compared judgement according to calculated result, if the digital signal passes through the shaping filter element
It is " 0 " that the power indifference of 4021 front and backs, which does not start gain compensation output judging result then, if power is greater than integer before integer
It is " 1 " that signal power detected value, which then exports judgement result greater than the power threshold of no signal, afterwards and after integer, and the gain is referred to
Show that signal i.e. judging result is exported to link control unit 403.Wherein, the digital power signal calculated before and after shaping filter can be with
It is embodied as counting the digital signal average power in a period of time, calculation method is numerous, such as passes through functionIt is calculated, the embodiment of the present invention is not particularly limited this；Deterministic process is exactly more calculated
The size of filtering front and back power.
Link control unit 403 is used for according to gain indication signal and gain reduction amount to shaping filter treated signal
Carry out gain compensation.Wherein, the specific implementation of gain compensation processing, illustratively can be with are as follows: if passing through power calculation element
4022 judgement determines and needs to carry out gain compensation, i.e., power is changed before and after shaping filter, then obtains gain reduction amount
Adjustment is compensated, the 5dB for example, if front-end A TT decays, then adjustment amount is just to increase 5dB herein, the realization of increase adjustment
It can be signal multiplied by corresponding gain values (gain recovery value, if the embodiment of the present invention is gain reduction amount) i.e.
It can.
DAC interface unit 404 is used for defeated according to JESD204B agreement after the signal progress conversion process after gain compensation
Out to the DAC converting member of signal conversion module 3, the signal that DAC interface unit 404 exports can be converted to by DAC converting member
Radio frequency analog signal, realization can be using radio frequency conversion chip, and the present embodiment uses AD9361.
Above-mentioned interference signal inhibits the course of work of device 1 are as follows: the radiofrequency signal of input can be directly by believing with interference
Number coupler for inhibiting device 1 to connect coupling or is arrived base station radio-frequency signal by antenna reception space radio frequency signal acquisition, at this
Mode is received using space in embodiment, behavior 2620MHz--2690MHz, upper behavior 2500MHz--2570MHz under frequency range,
Those skilled in the art should understand that be that Frequency Band Selection can be configured according to practical application, can be 300MHz--4GHz
Interior any communications band is not limited to 4GHz in later technology development, it is only necessary to be arranged and update rear end phase according to demand
The filter answered, interference signal inhibit device 1 the radiofrequency signal through low noise amplification module 2,3 and of signal processing module
After the processing of signal conversion module 4, then amplifies via power amplifier module 5 and export.Low noise amplification module 2 is embodied as filter, into
The radiofrequency signal entered is filtered, and filters out out-of-band interference signal, it is ensured that device accesses the relatively pure of signal, which can be with
It is duplexer, is also possible to sound table or dielectric filter, radiofrequency signal can be amplified to device after entering low noise amplification module 2
Expected power, as maximum power reaches 0dBm.Later, low noise amplification module 2 will treated that radiofrequency signal exports to declining
Subtract unit 301, exports after carrying out gain control via attenuation units 301 to Date Conversion Unit 302, Date Conversion Unit
DAC converting member (part for being responsible for the first conversion process) carries out radio frequency sampling to signal, is directly converted into radiofrequency signal
Numeric field intermediate-freuqncy signal, which exports, gives ADC interface unit, and ADC interface unit converts the data into effectively according to JESD204B agreement
Digital signal data, and peak values in real time power detection is carried out, it is compared with pre-determined threshold, is not grasped when power is less than threshold value
Make, difference is set as gain reduction amount when being greater than thresholding, and gain reduction amount is exported to link control unit 403, meanwhile,
ADC interface unit also controls attenuation units and decays to the signal inputted via low noise amplification module 2, and attenuation is as defeated
Out to the gain reduction amount of link control unit 403.Then, ADC interface unit exports effective digital signal to shaping filter
Unit filters out out of band signal by the completion of shaping filter unit, meanwhile, power calculation unit carries out the data before and after shaping
Power detection, and power contrast's result (i.e. gain indication signal) is sent to link control unit, power is greater than whole before integer
The power threshold that signal power detected value is greater than no signal after type and after integer, which then exports, determines result (i.e. gain indication signal)
For " 1 ", otherwise output determines that result is " 0 ".Signal after shaping enters in link control unit, and link control unit can be first
Gain indication signal is judged, when the judgement result of power calculation unit is " 1 ", link control unit starts its gain
Compensation function compensates the attenuation of front end attenuation unit into link, to carry out gain recovery to the signal after AF panel,
Restore the link gain of main signal, if it is determined that result is " 0 ", then gain does not adjust.Signal after having handled enters DAC interface
In unit, transferred data in the ADC converting member of Date Conversion Unit according to JESD204B agreement, and pass through digital-to-analogue conversion
(illustratively, being realized by DAC radio frequency conversion chip) transposes the signals into radio frequency analog signal.Radiofrequency signal after conversion into
Enter in filter unit, for after avoiding DAC interface unit exception, generating frequency spectrum in the desired band of the system of signal limiting
Diffusion, can carry out certain protective effect to power amplifier.Radio frequency analog signal after conversion process enters in power amplifier module
It amplifies, signal is amplified to the desired power grade of system, such as 43dBm, is exported later.
In the preferred embodiment, duplex can also be connect after power amplifier module 5, filter is handled by filter unit 303
It is sent to the signal of power amplifier module 5 afterwards, then will not by the nonlinear properties that the filtering of filter can guarantee that power amplifier module 5 introduces
Other frequency ranges are had an impact, it is ensured that the stability and reliability of whole device work.
Illustratively, above-mentioned attenuation units 301 can be implemented as digital pad, and power amplifier module can be implemented as power amplifier
Circuit.
In general, conventional passive device since intermediate zone is gentle, can not carry out adjacent nearlyr band interference signal
Effectively inhibit, or have inhibition, but after the transformation of link modulus, useful signal can not effectively be amplified by compression artefacts.And
The present invention effectively inhibits signal out-of-band interference by Digital Signal Processing, and passes through the decaying of detection front end attenuator
Amount carries out gain compensation to useful inband signaling, compensates for above-mentioned drawback.And the current network equipment is overcome in communication frequency
The drawbacks of belt edge can not work there are system when big signal interference can be seen that the present invention from the device architecture of the present embodiment
Scheme is implemented simply, effectively, can effectively inhibit interference signal, and the job applications context of expanding device, include
Communication needs to guarantee to can be used in the occasion of good communication quality.
Fig. 2 schematically shows that the interference signal of another embodiment according to the present invention inhibits device, as shown in Fig. 2,
It further includes monitoring module 6 that the interference signal, which inhibits device 1, for carrying out parameter configuration, signal processing mould to device 1
Block 4 is connect with monitoring module 6, for obtaining the parameter information of configuration, wherein the parameter information of configuration includes rated power door
Limit, average power and peak power control thresholding, and the parameter information of configuration can be according to the system of user demand and the communications field
Standard is manually set, and monitoring module 6 is not limited to this to the monitoring of device, can also be customized and be supervised according to user demand
Control function, such as monitor in real time, in this case, as shown in Fig. 2, can by monitoring module 6 respectively with device it is all its
He connects module, with the working condition of each module of real-time acquisition device and carries out the data interactions such as parameter acquisition.
Illustratively, monitoring module 6 carries out parameter configuration to device 1, and the parameter that can be implemented as receiving user setting is matched
Confidence breath, is stored, or is read the parameter configuration stored and exported to signal processing module 4.Illustratively, the ginseng of configuration
Number can be power threshold of device etc..
In this embodiment, average power, peak power control thresholding are also exported and control list to link by monitoring module 6
Member so that link control unit to signal carry out gain compensation after, can also mean value, peak power to link control
System, the link average power and peak power got carry out power control processing to the signal after gain compensation, it is ensured that system
The signal of output is without exception, to protect rear end power amplifier module.
Fig. 3 schematically shows the method flow inhibited to high reject signal according to an embodiment of the present invention
Figure, as shown in figure 3, including the following steps:
Step S301: being filtered the radiofrequency signal received and low noise processing, obtains meeting expected second letter
Number.Specific implementation are as follows: radiofrequency signal is filtered, out-of-band interference signal is filtered out, it is ensured that device accesses the relatively pure of signal,
And filtered signal is subjected to low noise processing, since the signal from antenna or other ends is usually quite faint, low noise
The position being respectively positioned under normal circumstances very close to antenna is put, loss of the signal by transmission line is can reduce, thus obtains
Meet expected second signal.
Step S302: gain control is carried out to second signal, obtains third signal.It is implemented as, when obtaining the second letter
After number, gain control can be carried out to second signal, obtain the gain reduction amount of second signal, signal is carried out according to gain reduction amount
Attenuation processing.Wherein, gain reduction amount is inputted by signal processing module, and therefore, initial attenuation amount is zero, the side specifically obtained
Formula and the damped manner for handling signal are referred to above-mentioned device and realize part.
Step S303: analog-to-digital conversion is carried out to third signal, obtains fourth signal.Concrete implementation mode can be for the
Three signals carry out radio frequency sampling, and radiofrequency signal is directly converted into numeric field intermediate-freuqncy signal, is referred to the modulus of the prior art
Conversion method.
Step S304: gain compensation processing is carried out to fourth signal, obtains the 5th signal.Specific implementation are as follows: believe the 4th
Number carry out data conversion, according to corresponding protocol conversion be internal available effective digital signal by it, and according to conversion after
Digital signal carries out power detection, determines gain reduction amount, then carrying out shaping filter processing to the digital signal after conversion (can be with
It is realized by digital filter)；Meanwhile the changed power of the signal also according to shaping filter before and after the processing generates gain instruction letter
Number；Later, gain compensation processing is carried out to the signal after shaping filter according to gain indication signal and gain reduction amount, generates the
Five signals.The specific implementation of the part is referred to the corresponding description of device part above.
Step S305: digital-to-analogue conversion is carried out to the 5th signal, obtains radio frequency analog signal.Specific implementation is referred to
The digital-analog convertion method of the prior art, illustratively as used radio frequency conversion chip.
Step S306: to radio frequency analog signal be filtered and enhanced processing after export.Treated letter will be passed through
It number is handled and (specifically can be through SAW filter and power amplifier) by filter and amplifier, it is possible thereby to make
To signal be amplified to the filtering of desired power grade and output signal, guarantee that device output signal meets expectation power etc.
Grade is simultaneously limited in desired communication band, avoids generating interference to other frequency ranges.
In the preferred embodiment, the processing in step S304 is also realized are as follows: after gain compensation processing, also according to setting
Average power thresholding and peak power thresholding carries out mean value to gain compensation treated signal and peak value controls, generate the 5th
Signal.
In the device and method step of the present embodiment, the downlink of signal processing is only gived, for wireless system
For, step needed for upstream and downstream link is the same, is referred to realize, so here is omitted.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
Claims (10)
1. interference signal inhibits device, which is characterized in that including low noise amplification module, signal conversion module, signal processing mould
Block and power amplifier module；
The radiofrequency signal of input is after the processing of low noise amplification module, signal processing module and signal conversion module, then via function
Amplification module amplification output；Wherein,
The signal conversion module is used to carry out gain control to the signal inputted by low noise amplification module, after gain control
Signal carry out the first conversion process output to the signal processing module, and the signal of signal processing module output is carried out
Second conversion process is exported to power amplifier module；
The signal processing module carries out gain control for controlling signal conversion module, and to the letter after the first conversion process
Number carry out gain compensation processing.
2. the apparatus according to claim 1, which is characterized in that the signal conversion module includes for putting to by low noise
The signal of big module input carries out the attenuation units of gain control；
The signal processing module includes
ADC interface unit generates internal available effective digital signal for receiving the data after the first conversion process；According to
Effective digital signal power, control attenuation units carry out gain control to the signal inputted by low noise amplification module, and will increase
Beneficial attenuation is exported to link control unit；
AF panel unit, effective digital signal for exporting to ADC interface unit carry out interference filtering and according to filtering out feelings
Condition generates gain indication signal and exports to link control unit；
Link control unit, for being carried out according to gain indication signal and gain reduction amount to the signal that AF panel unit exports
Gain compensation；
DAC interface unit, the signal for exporting to link control unit export after carrying out conversion process to signal conversion module
Carry out the second conversion process.
3. the apparatus of claim 2, which is characterized in that the AF panel unit includes
Shaping filter element, for carrying out shaping filter processing to the effective digital signal after ADC interface cell processing；With
Power calculation element generates gain indication signal and exports to chain for the changed power according to signal before and after shaping filter
Road control unit.
4. the apparatus of claim 2, which is characterized in that the link control unit is also used to according to the chain got
Road average power thresholding and peak power thresholding carry out power control processing to the signal after gain compensation.
5. device according to claim 4, which is characterized in that described device further includes monitoring module, for device into
Row parameter configuration,
The signal processing module is connect with monitoring module, for obtaining the parameter information of configuration, wherein the parameter information of configuration
Including rated power thresholding, average power thresholding and peak power thresholding.
6. device according to any one of claims 2 to 5, which is characterized in that the signal conversion module further includes data
Converting unit and filter unit,
The Date Conversion Unit includes ADC converting member and DAC converting member,
The signal that the ADC converting member is used to export attenuation units carries out the first conversion process, output intermediate-freuqncy signal to ADC
Interface unit；
The signal that the DAC converting member is used to export DAC interface unit carries out the second conversion process, output radio frequency analog letter
Number to filter unit；
The filter unit is for after being filtered to radio frequency analog signal, signal to be exported to power amplifier module.
7. the method that pair high reject signal is inhibited characterized by comprising
The radiofrequency signal received is filtered and low noise is handled, obtains meeting expected second signal；
Gain control is carried out to second signal, obtains third signal；
First conversion process is carried out to third signal, obtains fourth signal；
Gain compensation processing is carried out to fourth signal, obtains the 5th signal；
Second conversion process is carried out to the 5th signal, obtains radio frequency analog signal；
To radio frequency analog signal be filtered and enhanced processing after export.
8. being obtained the method according to the description of claim 7 is characterized in that described carry out gain compensation processing to fourth signal
5th signal includes
Fourth signal is converted into internal available effective digital signal, gain reduction is determined according to effective digital signal power
Amount；
Shaping filter processing is carried out to effective digital signal, and the changed power of the signal according to shaping filter before and after the processing generates
Gain indication signal；
Gain compensation processing is carried out to the signal after shaping filter according to gain indication signal and gain reduction amount, generates the 5th letter
Number.
9. according to the method described in claim 8, it is characterized in that, it is described to second signal carry out gain control, obtain third
Signal includes:
The gain reduction amount is obtained, signal attenuation processing is carried out according to the gain reduction amount.
10. method according to claim 8 or claim 9, which is characterized in that according to gain indication signal and gain reduction amount pair
After signal after shaping filter carries out gain compensation processing, also according to average power thresholding and peak power thresholding to gain compensation
Treated, and signal carries out mean value and peak value control.
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| CN112272351A (en) * | 2020-10-22 | 2021-01-26 | 浙江天则通信技术有限公司 | Anti-passive positioning device and system |
| CN112511178A (en) * | 2020-10-19 | 2021-03-16 | 河南智微电子有限公司 | Communication receiving module |
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| CN101656562A (en) * | 2009-09-22 | 2010-02-24 | 武汉虹信通信技术有限责任公司 | Device and method for realizing elimination of self-excitation interference of repeater |
| US20120077446A1 (en) * | 2010-09-24 | 2012-03-29 | Broadcom Corporation | Self-testing transceiver architecture and related method |
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| CN101656562A (en) * | 2009-09-22 | 2010-02-24 | 武汉虹信通信技术有限责任公司 | Device and method for realizing elimination of self-excitation interference of repeater |
| US20120077446A1 (en) * | 2010-09-24 | 2012-03-29 | Broadcom Corporation | Self-testing transceiver architecture and related method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112511178A (en) * | 2020-10-19 | 2021-03-16 | 河南智微电子有限公司 | Communication receiving module |
| CN112272351A (en) * | 2020-10-22 | 2021-01-26 | 浙江天则通信技术有限公司 | Anti-passive positioning device and system |
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