CN104954032B - Wireless receiver and its application method - Google Patents
Wireless receiver and its application method Download PDFInfo
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- CN104954032B CN104954032B CN201510268323.3A CN201510268323A CN104954032B CN 104954032 B CN104954032 B CN 104954032B CN 201510268323 A CN201510268323 A CN 201510268323A CN 104954032 B CN104954032 B CN 104954032B
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Abstract
The invention provides a kind of wireless receiver and its application method, simulation DC arresters search the simulation DC quantization tables stored in simulation DC quantization table modules according to the rf gain of wireless signal, the simulation DC quantized values of wireless signal are obtained, eliminate the simulation DC in wireless signal；The signal for simulating the output of DC arresters is subjected to analog-to-digital conversion using analog-digital converter, remaining digital DC value complements repay the remaining digital DC in the signal of analog-digital converter output in the signal for the analog-digital converter output that digital DC compensator is estimated using digital DC estimators afterwards；Larger digital remaining DC is monitored in real time using DC feedback controllers, the simulation DC quantized values of the corresponding rf gain of amendment in real time, eliminates simulation DC in analog end as far as possible.By simulating DC elimination and remaining digital DC compensation, and feedback monitoring mechanism, the DC in wireless signal is almost completely eliminated, enhances the demodulation performance of wireless receiver, improves the receiving sensitivity performance of wireless communication system.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of wireless receiver and its application method.
Background technology
Wireless communication system includes wireless transmitter and wireless receiver, therefore the work of wireless transmitter and wireless receiver
Make the performance that state directly determines wireless communication system.Wireless receiver in usual OFDM wireless communication systems is based in zero
Frequently (ZIF) framework, and the wireless receiver can produce the interference signal of interference wireless communication system in the course of the work, i.e., directly
Flow (DC).DC is mainly shown as two aspects for the performance compromise of wireless communication system：First, reducing ADC (analog-digital converter) has
Bit number is imitated, so as to reduce the dynamic range of wireless communication system SNR (signal to noise ratio)；Second, to this radio communication masters of OFDM
Stream is eated dishes without rice or wine technology, and DC can seriously reduce baseband module FFT performance.
At present, it is mainly that radio-frequency head passes through and is using scheme when tackling DC and influenceing the performance issue of wireless communication system
The static DC measurement tables generated during system initialization eliminate radio frequency DC, while use filter compensation residual DC in digital baseband.But
Currently existing scheme has the following disadvantages：
1) static DC eliminates pattern, does not possess real-time characteristic, can not cover caused by chip and plate level component difference
DC value inconsistencies；
2) static DC eliminates pattern, can cause larger residual DC, so as to reduce the performance of digital baseband system；
3) digital baseband feedback-less mechanism, digital baseband when measuring larger residual DC, can only using compensation model come
Improve baseband performance in part；
4) digital baseband DC firstorder filters use monosystem digital modeling, it is impossible to the quick tracking of balance transient state and stable state well
The demand of low ripple characteristic.
DC caused by wireless receiver can not be thoroughly eliminated for currently existing scheme, causes the property to wireless communication system
The problem of declining, those skilled in the art always search for preferable solution.
The content of the invention
, can not be thorough to solve currently existing scheme it is an object of the invention to provide a kind of wireless receiver and its application method
Bottom eliminates DC caused by wireless receiver, the problem of causing performance in wireless communication systems still to be disturbed by DC.
In order to solve the above technical problems, the present invention provides a kind of wireless receiver, the wireless receiver includes：
Simulate DC arresters, simulation DC quantifies table module, analog-digital converter, adaptive gain control unit, digital DC and estimated
Device and digital DC compensator, wherein,
The adaptive gain control unit receives the signal of the analog-digital converter output, and estimates the radio frequency of radio frequency link
Gain；
The simulation DC arresters receive wireless signal and the signal of adaptive gain control unit output, according to described
The rf gain of adaptive gain control unit estimation is searched the simulation DC stored in the simulation DC quantization table modules and quantified
Table, the simulation DC quantized values of the wireless signal are obtained, to eliminate the simulation DC in the wireless signal；
Analog-digital converter receives the signal of the simulation DC arresters output and analog-to-digital conversion is carried out to it, and will pass through mould
Signal after number conversion exports to digital estimator, digital DC compensator and adaptive gain control module respectively；
The digital DC estimators receive the signal of the analog-digital converter output, and estimate the analog-digital converter output
Signal in remaining digital DC values；
What the signal and the digital DC estimators of the digital DC compensator reception analog-digital converter output exported
Signal, remaining digital DC value complements are repaid in the signal exported using the analog-digital converter of the digital DC estimators estimation
Remaining digital DC in the signal of the analog-digital converter output, and export the signal after compensation.
Optionally, in described wireless receiver, in addition to DC feedback controllers, the DC feedback controllers receive institute
The signal of adaptive gain control unit output and the signal of the digital DC estimators output are stated, and outputs signal to the simulation
DC quantifies table module, to correct the simulation DC quantization tables stored in the simulation DC quantization table modules.
Optionally, in described wireless receiver, the DC feedback controllers include judge module and with the judgement
The connected correcting module of module, wherein,
The judge module receives the signal of the digital DC estimators output, and judges the digital DC estimators output
The absolute value of the digital DC values that is carried of signal whether be more than predetermined threshold, if so, then run the correcting module,
Conversely, the correcting module is not run then；
The correcting module receives the signal of the adaptive gain control unit output, is controlled according to the adaptive gain
Error be present in the simulation DC quantization tables that the rf gain of the signal of device output determines to store in the simulation DC quantization table modules
Simulation DC quantized values, and there is mistake in the digital DC values amendment that the signal exported according to the digital DC estimators is carried
The simulation DC quantized values of difference.
Optionally, in described wireless receiver, the digital DC estimators are that the single order with double feedback factors is low
Bandpass filter, double feedback factors include the first feedback factor and the second feedback factor, and the first feedback factor bandwidth is high
In second feedback factor, the control signal using frame head verification sequence as switching feedback factor, when the frame head verifies sequence
When row are judged as mistake, using the first feedback factor, quickly to track number remaining in the signal of the analog-digital converter output
Word DC；When the frame head verification sequence is judged as correct, using the second feedback factor, with analog-digital converter described in steady track
Remaining digital DC in the signal of output.
Optionally, in described wireless receiver, the simulation DC arresters include the data call mould being sequentially connected
Block, digital analog converter, analog signal biasing module, the data call module receives wireless signal and the simulation DC quantifies table
The signal of module output, and table is quantified according to the rf gain of wireless signal and the simulation DC, obtain the simulation of wireless signal
DC quantized values；The simulation DC quantized values are converted to simulation DC by the digital analog converter；The analog signal biasing module is led to
The mode for crossing analog signal skew eliminates the simulation DC.
Optionally, in described wireless receiver, the generating process that the simulation DC quantifies table is as follows：
In the initial phase of the wireless receiver, radio frequency link measures rf gain most using DC Measurement Algorithms are simulated
The simulation DC quantized values corresponding to each rf gain between big value and rf gain minimum value；
When all rf gains have all measured, the simulation DC quantized values deposit simulation corresponding to each rf gain will be measured
Quantify table.
Optionally, in described wireless receiver, the digital DC compensator is a subtracter.
Optionally, in described wireless receiver, in addition to low noise amplifier and frequency mixer, the wireless signal is successively
The simulation DC arresters are transferred to after low noise amplifier, frequency mixer processing.
Optionally, in described wireless receiver, in addition to low pass filter and variable-gain amplifier, the simulation DC
The signal of arrester output is successively transferred to the modulus after the low pass filter, variable-gain amplifier processing and turned
Parallel operation.
Optionally, in described wireless receiver, the signal of the adaptive gain control unit output is transferred to institute
State low noise amplifier, the frequency mixer, the low pass filter and the variable-gain amplifier, with to the low noise amplifier,
The frequency mixer, the low pass filter and variable-gain amplification carry out automatic adjusument.
The present invention also provides a kind of application method of wireless receiver, comprises the following steps：
Simulate DC arresters and receive wireless signal, and the simulation DC amounts are searched according to the rf gain of the wireless signal
The simulation DC quantization tables stored in change table module, the simulation DC quantized values of the wireless signal are obtained, to eliminate the wireless communication
Simulation DC in number；
Analog-digital converter receives the signal of the simulation DC arresters output and analog-to-digital conversion is carried out to it, and will pass through mould
Signal after number conversion exports to digital estimator, digital DC compensator and adaptive gain control module respectively；
The adaptive gain control unit receives the signal of the analog-digital converter output and carries out automatic adjusument to it,
And quantify table module to simulation DC by the signal output after adaptively adjusting is carried out；
Digital DC estimators receive the signal of the analog-digital converter output, and estimate the letter of the analog-digital converter output
Remaining digital DC values in number；
Digital DC compensator receives the signal of the analog-digital converter output and the signal of the digital DC estimators output,
Remaining digital DC value complements are repaid described in the signal exported using the analog-digital converter of the digital DC estimators estimation
Remaining digital DC in the signal of analog-digital converter output, and export the signal after compensation.
In wireless receiver provided by the present invention and its application method, DC arresters penetrating according to wireless signal is simulated
The simulation DC quantization tables stored in frequency gain lookup simulation DC quantization table modules, obtain the simulation DC quantized values of wireless signal, disappear
Except the simulation DC in wireless signal；The signal for simulating the output of DC arresters is subjected to analog-to-digital conversion using analog-digital converter, afterwards
Remaining digital DC value complements are repaid in the signal for the analog-digital converter output that digital DC compensator is estimated using digital DC estimators
Remaining digital DC in the signal of analog-digital converter output is by simulating DC elimination and remaining digital DC compensation, almost
The DC in wireless signal is completely eliminated, avoids DC presence from causing damage performance in wireless communication systems, improves channel radio
The receiving sensitivity performance of letter system.On the other hand, due to the presence of DC feedback controllers, realize and digital DC estimators are exported
The digital DC values that are carried of signal monitored in real time, quantifying table to quantify the simulation DC of table module storage to simulation DC is carried out
Amendment in real time, improve the accuracy of simulation DC quantization tables, for the follow-up simulation DC quantized values for accurately determining wireless signal, compared with
Good elimination simulation DC lays the foundation.On the other hand, because digital DC estimators use the single order low pass with double feedback factors
Wave filter, can remaining digital DC in the signal of tracing compensation analog-digital converter output real-time, it is wireless so as to improve
The demodulation performance of receiver.
Brief description of the drawings
Fig. 1 is the structural representation of wireless receiver in one embodiment of the invention；
Fig. 2 is the operation principle schematic diagram that DC quantization table modules are simulated in one embodiment of the invention；
Fig. 3 is the operation principle schematic diagram that DC arresters are simulated in one embodiment of the invention；
Fig. 4 is digital DC estimators operation principle schematic diagram in one embodiment of the invention；
Fig. 5 is DC feedback controllers operation principle schematic diagram in one embodiment of the invention.
In figure, simulation DC quantifies table module -10；Simulate DC arresters -20；Data call module -21；Digital analog converter-
22；Analog signal biasing module -23；Digital DC estimators -30；Digital DC compensator -40；DC feedback controllers -50.
Embodiment
Wireless receiver proposed by the present invention is described in further detail below in conjunction with the drawings and specific embodiments.According to
Explanation and claims, advantages and features of the invention will become apparent from below.It should be noted that accompanying drawing use simplifies very much
Form and use non-accurately ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Fig. 1 is refer to, it is the structural representation of wireless receiver in one embodiment of the invention, as shown in figure 1, the nothing
Line receiver includes：Simulate DC arresters 20, simulation DC quantifies table module 10, analog-digital converter, adaptive gain control unit, number
Word DC estimators 30 and digital DC compensator 40, wherein,
The adaptive gain control unit receives the signal of the analog-digital converter output, and estimates the radio frequency of radio frequency link
Gain；The simulation DC arresters 20 receive wireless signal and the signal of adaptive gain control unit output, according to described
The rf gain of adaptive gain control unit estimation searches the simulation DC amounts stored in the simulation DC quantization tables module 10
Change table, the simulation DC quantized values of the wireless signal are obtained, to eliminate the simulation DC in the wireless signal；Analog-digital converter connects
Receive the signal that the simulation DC arresters 20 export and analog-to-digital conversion is carried out to it, and the signal after analog-to-digital conversion is distinguished
Export to digital estimator, digital DC compensator 40 and adaptive gain control module；The digital DC estimators 30 receive institute
The signal of analog-digital converter output is stated, and estimates digital DC values remaining in the signal of the analog-digital converter output；The number
Word DC compensators 40 receive the signal that the signal of the analog-digital converter output and the digital DC estimators 30 export, and utilize institute
State digital DC value complements remaining in the signal for the analog-digital converter output that digital DC estimators 30 are estimated and repay the modulus
Remaining digital DC in the signal of converter output, and export the signal after compensation.Digital DC compensator 40 in the present embodiment
A preferably subtracter.Here, simulation DC quantization tables are that wireless receiver previously generates in the starting stage and is stored in simulation DC
Quantify in table module 10, the mould corresponding to each rf gain of radio frequency link work has been recorded in the simulation DC quantization tables
Intend DC quantized values.Here, the process of the rf gain of adaptive gain control unit estimation radio frequency link is complete by software merit rating
Into, due to the common knowledge that the content is art technology, do not remake excessive repeat herein.
Further, the wireless receiver also includes DC feedback controllers 50, and the DC feedback controllers 50 receive institute
The signal that the signal of adaptive gain control unit output and the digital DC estimators 30 export is stated, and outputs signal to the mould
Intend DC and quantify table module 10, to correct the simulation DC quantization tables stored in the simulation DC quantization tables module 10.
Preferably, wireless receiver also includes low noise amplifier, frequency mixer, low pass filter and variable-gain amplifier, institute
State wireless signal and be successively transferred to the simulation DC arresters 20, the mould after low noise amplifier, frequency mixer processing
The signal S1 for intending the output of DC arresters 20 is successively transferred to institute after the low pass filter, variable-gain amplifier processing
State analog-digital converter.The signal of adaptive gain control unit output be transferred to the low noise amplifier, the frequency mixer,
The low pass filter and the variable-gain amplifier, with to the low noise amplifier, the frequency mixer, the low pass filter
And the variable-gain amplification carries out automatic adjusument.Here put for low noise amplifier, frequency mixer, low pass filter and variable-gain
The concrete structure of big device and its common knowledge that respective operation principle is those skilled in the art, are just repeated no more herein.
In order to be better understood from the wireless receiver operation principle of the application, with reference to Fig. 2~Fig. 5 to wireless receiver
The operation principle of included each device is illustrated.
It refer to Fig. 2, in the present embodiment, the generating process that the simulation DC quantifies table is as follows：In the wireless receiver
Initial phase, radio frequency link using simulates DC Measurement Algorithms measurement rf gain maximum and rf gain minimum value between
Each rf gain corresponding to simulation DC quantized values；When all rf gains have all measured, each rf gain will be measured
Corresponding simulation DC quantized values deposit analog quantization table.As shown in Figure 2, it is assumed here that the quantizing bit number of simulation DC quantized values
For N, it is assumed that rf gain value Gain maximum is Gain_max, minimum value Gain_min, using simulating DC Measurement Algorithms
Corresponding the simulation DC quantized values of each rf gain between Gain_min and Gain_max are measured, it is determined that each rf gain pair
The processes of the simulation DC quantized values answered is, it is necessary to all cycle criterions one time of N number of bit numbers of DC quantized values will be simulated, utilization will simulate
The quantizing bit number of DC quantized values is embodied in the form of bit bit indexes, when simulating DC measurement results more than zero, equivalent to rope
I=N bit is cited as with the presence of data, conversely, index does not have data presence for i bit, can be now indexed
It whether there is the judgement of data for i-1 bit, judge just to terminate under current radio frequency gain to simulating DC amounts until completing n times
The measurement of change value.After all rf gains all undergo n times cycle criterion between Gain_min and Gain_max, simulation DC measurements
Terminate, the simulation DC measured corresponding to each rf gain is quantified to refer to deposit simulation DC quantization tables, end simulation DC quantifies table
Generating process.It should be noted that analog quantization table storage here is that simulation DC quantized values are stored in the form of digital DC
's.
Preferably, refer to Fig. 3, it is the operation principle schematic diagram that DC arresters 20 are simulated in one embodiment of the invention.
As shown in figure 3, the simulation DC arresters 20 include be sequentially connected data call module 21, digital analog converter 22, simulation letter
Number biasing module 23, the data call module 21 receives wireless signal and the simulation DC quantifies the letter that table module 10 exports
Number, and table is quantified according to the rf gain of wireless signal and the simulation DC, obtain the simulation DC quantized values of wireless signal；It is described
The simulation DC quantized values are converted to simulation DC by digital analog converter 22；The analog signal biasing module 23 passes through analog signal
The mode of skew eliminates the simulation DC.That is simulation DC contained in wireless signal is disappeared using DC arresters 20 are simulated
Remove, it is contemplated that simulation DC arresters 20 possibly can not thoroughly remove all simulation DC in wireless signal, in order to thoroughly remove
Interference of the DC for wireless communication system, it is follow-up to devise the structure for removing residual simulation DC again, removed in order to more accurate
Residual simulation DC, the technical scheme of the application are will to remain the form removal simulated DC and be converted to digital DC.Further, by mould
The signal S1 for intending the output of DC arresters 20 is converted to the form of data signal by analog-digital converter, utilizes digital DC estimators 30
The digital DC remained in the signal S2 of analog-digital converter output is removed with the cooperating of digital DC compensator 40 and (it is residual to be equal to S1 institutes
The simulation DC stayed), the signal that now digital DC compensator 40 is exported is almost thoroughly eliminates the signal after DC, so as to avoid nothing
DC presence causes damage to performance in wireless communication systems caused by line receiver, and the reception for improving wireless communication system is sensitive
Spend performance.
Fig. 4 is refer to, it is the digital operation principle schematic diagram of DC estimators 30 in one embodiment of the invention.As shown in figure 4,
The digital DC estimators 30 are the low-pass first order filter with double feedback factors, compared to existing low-pass first order filter
Difference is that the low-pass first order filter with double feedback factors has two feedback factors, it is possible to achieve tracks mould real-time
Remaining digital DC in the signal S2 of number converter output, so as to accurately estimate digital DC remaining in S2.Double feedbacks
Factor alpha includes the first feedback factor α 1 and the second feedback factor α 2, and the bandwidth of the first feedback factor α 1 is anti-higher than described second
Feedforward coefficient α 2, the control signal using frame head verification sequence (HCS) as switching feedback factor (between α 1 and α 2 switch), works as institute
When stating frame head verification sequence and being judged as mistake, using the first feedback factor α 1, quickly to track the analog-digital converter output
Remaining digital DC in signal S2；When the frame head verification sequence is judged as correct, using the second feedback factor α 2, with stable state
Track digital DC remaining in the signal S2 of the analog-digital converter output.
Refer to Fig. 1 and 5, Fig. 5 is the operation principle schematic diagram of DC feedback controllers 50 in one embodiment of the invention.In order to compared with
Good realization removes DC caused by wireless receiver, and the application devises the DC feedback controls for correcting simulation DC quantization tables
Device 50.The core concept of design is：By the real-time monitoring to digital DC estimators 30, to assess in simulation DC arresters 20
Place eliminates simulation DC effect, so as to evaluate the accuracy for the simulation DC quantization tables that simulation DC quantization tables module 10 is generated,
Realize that simulation DC quantifies the amendment of table.
Specifically, the DC feedback controllers 50 include judge module and the correcting module being connected with the judge module,
Wherein, the judge module receives the signal of the digital DC estimators output, and judges that the digital DC estimators 30 export
The absolute values of the digital DC values that are carried of signal S3 whether be more than predetermined threshold, if so, then running the amendment mould
Block, conversely, not running the correcting module then；The correcting module receives the signal of the adaptive gain control unit output,
The rf gain of the signal exported according to the adaptive gain control unit determines what is stored in the simulation DC quantization table modules
The simulation DC quantized values of error in simulation DC quantization tables be present, and carried according to the signal of the digital DC estimators output
The simulation DC quantized values of error be present in the digital DC values amendment.Wherein, the predetermined threshold is those skilled in the art's root
The factually value of border need of work setting, does not make excessive repeat at this to it.
Further, DC feedback controllers 50 receive carries in signal S3, S3 from the conveying of digital DC estimators 30
Remaining digital DC results in the S2 that digital DC estimators 30 are estimated, if digital DC shows to simulate DC not less than predetermined threshold
Arrester 20 is preferable for simulation DC eradicating efficacies, without correcting current simulation DC quantization tables.If digital DC exceedes predetermined door
Limit value, show to simulate DC arresters 20 for the not good enough of simulation DC eliminations, remained excessive simulation DC, shown currently used
Simulation DC quantization tables error be present and (because it is rf gain according to wireless signal to eliminate simulation DC, obtain the simulation DC
The simulation DC quantized values elimination of the rf gain of wireless signal is corresponded in quantization table), it is necessary to run digital DC estimators 30
Correcting module amendment simulation DC quantifies table.Please continue to refer to Fig. 5, amendment simulation DC quantifies the process of table, and actually amendment is worked as
The corresponding simulation DC quantized values of preceding rf gain, and the amendment for simulating DC quantized values is designed into and simulates repairing for DC directions and numerical value
Just.
Accordingly, the application also provides a kind of application method of wireless receiver, specifically comprises the following steps：
Simulate DC arresters and receive wireless signal, and the simulation DC amounts are searched according to the rf gain of the wireless signal
The simulation DC quantization tables stored in change table module, the simulation DC quantized values of the wireless signal are obtained, to eliminate the wireless communication
Simulation DC in number；
Analog-digital converter receives the signal of the simulation DC arresters output and analog-to-digital conversion is carried out to it, and will pass through mould
Signal after number conversion exports to digital estimator, digital DC compensator and adaptive gain control module respectively；
The adaptive gain control unit receives the signal of the analog-digital converter output and carries out automatic adjusument to it,
And quantify table module to simulation DC by the signal output after adaptively adjusting is carried out；
Digital DC estimators receive the signal of the analog-digital converter output, and estimate the letter of the analog-digital converter output
Remaining digital DC values in number；
Digital DC compensator receives the signal of the analog-digital converter output and the signal of the digital DC estimators output,
Remaining digital DC value complements are repaid described in the signal exported using the analog-digital converter of the digital DC estimators estimation
Remaining digital DC in the signal of analog-digital converter output, and export the signal after compensation.
To sum up, in wireless receiver provided by the present invention and its application method, simulation DC arresters are according to wireless communication
Number rf gain search the simulation DC quantization tables that store in simulation DC quantization table modules, the simulation DC for obtaining wireless signal quantifies
Value, eliminate the simulation DC in wireless signal；The signal for simulating the output of DC arresters is subjected to analog-to-digital conversion using analog-digital converter,
Digital DC value complements remaining in signal of the digital DC compensator using the analog-digital converter output of digital DC estimators estimation afterwards
The remaining digital DC in the signal of analog-digital converter output is repaid by simulating DC elimination and remaining digital DC compensation,
The DC in wireless signal is almost completely eliminated, avoids DC presence from causing damage performance in wireless communication systems, improves nothing
The receiving sensitivity performance of line communication system.On the other hand, due to the presence of DC feedback controllers, realize to digital DC estimators
The digital DC values that the signal of output is carried are monitored in real time, quantify table to quantify the simulation DC of table module storage to simulation DC
Corrected in real time, improve the accuracy of simulation DC quantization tables, quantified for the follow-up simulation DC for accurately determining wireless signal
Value, preferably elimination simulation DC lay the foundation.On the other hand, because digital DC estimators use the single order with double feedback factors
Low pass filter, can remaining digital DC in the signal of tracing compensation analog-digital converter output real-time, so as to improve
The demodulation performance of wireless receiver.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Scope.
Claims (9)
- A kind of 1. wireless receiver, it is characterised in that including：Simulate DC arresters, simulation DC quantifies table module, analog-to-digital conversion Device, adaptive gain control unit, digital DC estimators, digital DC compensator and DC feedback controllers, wherein,The adaptive gain control unit receives the signal of the analog-digital converter output, and estimates that the radio frequency of radio frequency link increases Benefit；The simulation DC arresters receive wireless signal and the signal of adaptive gain control unit output, according to described adaptive The rf gain for answering gain controller to estimate searches the simulation DC quantization tables stored in the simulation DC quantization table modules, obtains The simulation DC quantized values of the wireless signal are taken, to eliminate the simulation DC in the wireless signal；Analog-digital converter receives the signal of the simulation DC arresters output and analog-to-digital conversion is carried out to it, and will turn by modulus Signal after changing exports to digital estimator, digital DC compensator and adaptive gain control module respectively；The digital DC estimators receive the signal of the analog-digital converter output, and estimate the letter of the analog-digital converter output Remaining digital DC values in number；The digital DC compensator receives the signal of the analog-digital converter output and the signal of the digital DC estimators output, Remaining digital DC value complements are repaid described in the signal exported using the analog-digital converter of the digital DC estimators estimation Remaining digital DC in the signal of analog-digital converter output, and export the signal after compensation；The DC feedback controllers receive the signal of the adaptive gain control unit output and the digital DC estimators output Signal, and the simulation DC quantization table modules are outputed signal to, to correct the mould stored in the simulation DC quantization table modules Intend DC and quantify table；The DC feedback controllers include judge module and the correcting module being connected with the judge module, wherein,The judge module receives the signal of the digital DC estimators output, and judges the letter of the digital DC estimators output Whether the absolute value of number digital DC values carried is more than predetermined threshold, if so, then running the correcting module, instead It, then do not run the correcting module；The correcting module receives the signal of the adaptive gain control unit output, defeated according to the adaptive gain control unit The mould of error in the simulation DC quantization tables that the rf gain of the signal gone out determines to store in the simulation DC quantization table modules be present Intend DC quantized values, and the digital DC values amendment that the signal exported according to the digital DC estimators is carried has error Simulate DC quantized values.
- 2. wireless receiver as claimed in claim 1, it is characterised in that the digital DC estimators are with double feedback factors Low-pass first order filter, double feedback factors include the first feedback factor and the second feedback factor, the first feedback system Number bandwidth is higher than second feedback factor, the control signal using frame head verification sequence as switching feedback factor, when the frame When head verification sequence is judged as mistake, using the first feedback factor, quickly to track in the signal of the analog-digital converter output Remaining digital DC；When the frame head verification sequence is judged as correct, using the second feedback factor, with mould described in steady track Remaining digital DC in the signal of number converter output.
- 3. wireless receiver as claimed in claim 1, it is characterised in that the simulation DC arresters include the number being sequentially connected According to calling module, digital analog converter, analog signal biasing module, the data call module receives wireless signal and the simulation DC quantifies the signal of table module output, and quantifies table according to the rf gain of wireless signal and the simulation DC, obtains wireless communication Number simulation DC quantized values；The simulation DC quantized values are converted to simulation DC by the digital analog converter；The analog signal is inclined Module is put to eliminate the simulation DC by way of analog signal skew.
- 4. wireless receiver as claimed in claim 1, it is characterised in that the generating process that the simulation DC quantifies table is as follows：In the initial phase of the wireless receiver, radio frequency link measures rf gain maximum using DC Measurement Algorithms are simulated Simulation DC quantized values corresponding to each rf gain between rf gain minimum value；When all rf gains have all measured, the simulation DC quantized values deposit analog quantization corresponding to each rf gain will be measured Table.
- 5. wireless receiver as claimed in claim 1, it is characterised in that the digital DC compensator is a subtracter.
- 6. the wireless receiver as any one of claim 1 to 5, it is characterised in that also including low noise amplifier and mix Frequency device, the wireless signal are successively transferred to the simulation DC arresters after low noise amplifier, frequency mixer processing.
- 7. wireless receiver as claimed in claim 6, it is characterised in that also including low pass filter and variable-gain amplifier, The signal of the simulation DC arresters output is successively transferred to after the low pass filter, variable-gain amplifier processing The analog-digital converter.
- 8. wireless receiver as claimed in claim 7, it is characterised in that the signal of the adaptive gain control unit output is equal The low noise amplifier, the frequency mixer, the low pass filter and the variable-gain amplifier are transferred to, with to the low noise Amplifier, the frequency mixer, the low pass filter and variable-gain amplification carry out automatic adjusument.
- 9. the application method of a kind of wireless receiver as any one of claim 1 to 8, it is characterised in that including such as Lower step：Simulate DC arresters and receive wireless signal, and the simulation DC is searched according to the rf gain of the wireless signal and quantifies table The simulation DC quantization tables stored in module, the simulation DC quantized values of the wireless signal are obtained, to eliminate in the wireless signal Simulation DC；Analog-digital converter receives the signal of the simulation DC arresters output and analog-to-digital conversion is carried out to it, and will turn by modulus Signal after changing exports to digital estimator, digital DC compensator and adaptive gain control module respectively；The adaptive gain control unit receives the signal of the analog-digital converter output and automatic adjusument is carried out to it, and will Carry out the signal output after adaptively adjusting and quantify table module to simulation DC；Digital DC estimators receive the signal of the analog-digital converter output, and estimate in the signal of the analog-digital converter output Remaining digital DC values；Digital DC compensator receives the signal of the analog-digital converter output and the signal of the digital DC estimators output, utilizes Remaining digital DC value complements repay the modulus in the signal of the analog-digital converter output of the digital DC estimators estimation Remaining digital DC in the signal of converter output, and export the signal after compensation.
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| CN201510268323.3A CN104954032B (en) | 2015-05-22 | 2015-05-22 | Wireless receiver and its application method |
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| CN201510268323.3A CN104954032B (en) | 2015-05-22 | 2015-05-22 | Wireless receiver and its application method |
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| CN104954032B true CN104954032B (en) | 2018-01-26 |
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| JP4091671B2 (en) * | 1995-08-08 | 2008-05-28 | 松下電器産業株式会社 | DC offset compensator |
| US6327313B1 (en) * | 1999-12-29 | 2001-12-04 | Motorola, Inc. | Method and apparatus for DC offset correction |
| CN1140967C (en) * | 2000-06-23 | 2004-03-03 | 华为技术有限公司 | Automatic gain control (AGC) method for digital base band |
| US6735422B1 (en) * | 2000-10-02 | 2004-05-11 | Baldwin Keith R | Calibrated DC compensation system for a wireless communication device configured in a zero intermediate frequency architecture |
| ES2364630T3 (en) * | 2001-02-16 | 2011-09-08 | Qualcomm Incorporated | DIRECT CONVERSION RECEIVER ARCHITECTURE. |
| US7233624B2 (en) * | 2002-06-11 | 2007-06-19 | Interdigital Technology Corporation | Method and system for all digital gain control |
| JP4289667B2 (en) * | 2003-09-16 | 2009-07-01 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | Variable gain control circuit and receiver |
| US8331892B2 (en) * | 2008-03-29 | 2012-12-11 | Qualcomm Incorporated | Method and system for DC compensation and AGC |
| CN102035578B (en) * | 2009-09-29 | 2014-03-12 | 中兴通讯股份有限公司南京分公司 | Automatic grain control method and device for diversity receiving |
| US8982995B1 (en) * | 2013-11-05 | 2015-03-17 | Microelectronics Technology Inc. | Communication device and method of multipath compensation for digital predistortion linearization |
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