CN110392421A - A kind of signal processing method and equipment based on AGC - Google Patents
A kind of signal processing method and equipment based on AGC Download PDFInfo
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- CN110392421A CN110392421A CN201810351066.3A CN201810351066A CN110392421A CN 110392421 A CN110392421 A CN 110392421A CN 201810351066 A CN201810351066 A CN 201810351066A CN 110392421 A CN110392421 A CN 110392421A
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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
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
Abstract
The embodiment of the present invention provides a kind of signal processing method and equipment based on AGC, receives the poor technical problem for the treatment of effect to signal for solving receiving device in the prior art.This method comprises: determining modulation system used by the service signal that sending ending equipment is sent；According to default inquiry table, at least one corresponding AGC power back-off parameters of the modulation system are determined, and reception processing is carried out to the service signal according at least one described AGC power back-off parameters；Wherein, the Different Modulations and the corresponding AGC power back-off parameters of every kind of modulation system that record has the sending ending equipment to support in the default inquiry table, it realizes the safe clearance that AGC is dynamically set according to different modulation systems, improves the success rate of the reception processing to service signal.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of signal processing method and equipment based on AGC.
Background technique
In wireless communication procedure, terminal receiver needs process simulation AGC (Automatic Gain Control, from
Dynamic gain control) it zooms in or out to analog signal, so as in analog-digital converter (Analog Digital
Converter, ADC) sampling processing when, signal can be fallen in the zone of reasonableness of A/D.
Currently, terminal receiver is mainly according to the AGC bit number of support (for showing that analog signal is converted to digital signal
Precision) reasonable AGC target value, the i.e. size of the safe capacity of AGC (safetymargin) be set, to guarantee certain connect
Power redundancy is received, terminal receiver is arranged in reasonable AGC process range.
But if system is in given resource, since received different business may use different modulating-coding sides
Formula, distance is smaller between the planisphere of high order modulation, and the influence to quantizing noise is more sensitive, and the AGC operation interval of high order modulation is more
It is small.Therefore, if receiving device considers the safe clearance of setting AGC only according to a kind of modulation system, the essence of demodulation is easily influenced
Accuracy even results in the reception failure of signal.
In summary, receiving device is poor to the reception treatment effect of signal in the prior art.
Summary of the invention
The embodiment of the present invention provides a kind of signal processing method and equipment based on AGC, connects in the prior art for solving
Receiving end equipment receives the poor technical problem for the treatment of effect to signal.
In a first aspect, the embodiment of the present invention provides a kind of signal processing method based on AGC, comprising the following steps:
Determine modulation system used by the service signal that sending ending equipment is sent；
According to default inquiry table, at least one corresponding AGC power back-off parameters of the modulation system are determined；Wherein, institute
State the Different Modulations and the corresponding AGC function of every kind of modulation system that record has the sending ending equipment to support in default inquiry table
Rate back-off parameter；
Reception processing is carried out to the service signal according at least one described AGC power back-off parameters.
Optionally, according to inquiry table is preset, at least one corresponding AGC power back-off parameters of the modulation system are determined
Before, the method also includes:
The modulation intelligence that the sending ending equipment is sent is obtained by control channel, the modulation intelligence is used to indicate described
The Different Modulations that sending ending equipment is supported；
Determine the peak value of signal quantization noise ratio SQNR corresponding to every kind of modulation system in the Different Modulations；
According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；
According to the corresponding relationship of the modulation system and the AGC power back-off parameters, default inquiry table is generated.
Optionally, according to the peak value of the SQNR, the corresponding AGC power back-off parameters of each modulation system are determined, comprising:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC power of corresponding modulation system to return
Move back parameter.
Optionally, reception processing is carried out to the service signal according at least one described AGC power back-off parameters, wrapped
It includes:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
Optionally, the target AGC power back-off parameters at least one described AGC power back-off parameters are determined, comprising:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC
Power back-off parameters.
Optionally, after setting the reception power of the receiving device for the target AGC power back-off parameters,
The method also includes:
Determine that the modulation system for the service signal that the sending ending equipment is sent changes；
According to the default inquiry table, AGC power back-off parameters corresponding to the modulation system after changing are determined；
The reception power of the receiving device is updated according to determining AGC power back-off parameters.
Second aspect, the embodiment of the present invention provide a kind of receiving device, comprising:
Receiver, for determine sending ending equipment send service signal used by modulation system；
Processor, for according to inquiry table is preset, determining corresponding at least one the AGC back-off ginseng of the modulation system
Number, and reception processing is carried out to the service signal according at least one described AGC power back-off parameters；Wherein, described default
The Different Modulations and the corresponding AGC back-off of every kind of modulation system that record has the sending ending equipment to support in inquiry table
Parameter,
Optionally, the receiver is also used to: according to inquiry table is preset, determining the modulation system corresponding at least one
Before a AGC power back-off parameters, the modulation intelligence that the sending ending equipment is sent, the modulation letter are obtained by control channel
Breath is used to indicate the Different Modulations that the sending ending equipment is supported；
The processor is also used to: determining that signal quantization corresponding to every kind of modulation system is made an uproar in the Different Modulations
The peak value of acoustic ratio SQNR；According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；And root
According to the corresponding relationship of the modulation system and the AGC power back-off parameters, default inquiry table is generated.
Optionally, the processor is used for:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC power of corresponding modulation system to return
Move back parameter.
Optionally, the processor is specifically used for:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
Optionally, the processor is specifically used for:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC
Power back-off parameters.
Optionally, the processor is also used to:
After setting the reception power of the receiving device for the target AGC power back-off parameters, institute is determined
The modulation system for stating the service signal of sending ending equipment transmission changes, and according to the default inquiry table, determines the modulation after changing
AGC power back-off parameters corresponding to mode, and connecing for the receiving device is updated according to determining AGC power back-off parameters
Receive power.
The third aspect, the embodiment of the present invention provide a kind of receiving device, comprising:
First determining module, for determine sending ending equipment send service signal used by modulation system；
Second determining module, for determining at least one corresponding AGC power of the modulation system according to inquiry table is preset
Back-off parameter；Wherein, the Different Modulations and every kind of tune that record has the sending ending equipment to support in the default inquiry table
The corresponding AGC power back-off parameters of mode processed；
Receiving module, for carrying out receiving area to the service signal according at least one described AGC power back-off parameters
Reason.
Optionally, the receiving device further include:
Module is obtained, for according to inquiry table is preset, determining that at least one corresponding AGC power of the modulation system returns
Before moving back parameter, the modulation intelligence that the sending ending equipment is sent is obtained by control channel, the modulation intelligence is used to indicate
The Different Modulations that the sending ending equipment is supported；
Third determining module, for determining, signal quantization corresponding to every kind of modulation system is made an uproar in the Different Modulations
The peak value of acoustic ratio SQNR；
According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；
According to the corresponding relationship of the modulation system and the AGC power back-off parameters, default inquiry table is generated.
Optionally, second determining module is used for:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC power of corresponding modulation system to return
Move back parameter.
Optionally, second determining module is specifically used for:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
Optionally, second determining module is specifically used for:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC
Power back-off parameters.
Optionally, the receiving device also includes update module,
Second determining module is also used to: being set setting the receiving end for the target AGC power back-off parameters
After standby reception power, determine that the modulation system for the service signal that the sending ending equipment is sent changes, and according to described pre-
If inquiry table, AGC power back-off parameters corresponding to the modulation system after changing are determined；
The update module is used for: the reception function of the receiving device is updated according to determining AGC power back-off parameters
Rate.
Fourth aspect, the embodiment of the present invention provide a kind of computer installation, and the computer installation includes processor, described
The step of processor realizes method as described in relation to the first aspect when being used to execute the computer program stored in memory.
5th aspect, the embodiment of the present invention provide a kind of readable storage medium storing program for executing, are stored thereon with computer program, the meter
The step of method as described in relation to the first aspect is realized when calculation machine program is executed by processor.
In the embodiment of the present invention, due to presetting record has receiving device to support in inquiry table Different Modulations and every
The corresponding AGC power back-off parameters of kind modulation system, therefore sending service signal in sending ending equipment is that receiving device passes through true
Determine modulation system used by service signal, at least one corresponding AGC function of modulation system can be determined according to default inquiry table
Rate back-off parameter, and then reception processing is carried out to service signal according at least one AGC power back-off parameters, therefore, receiving
During end equipment receives service signal, corresponding AGC power can be determined according to the different modulating mode of service signal
Back-off parameter realizes the safe clearance that AGC is dynamically arranged according to different modulation systems, improves the receiving area to service signal
The success rate of reason.
Detailed description of the invention
Fig. 1 is the schematic diagram that simulation AGC used by the embodiment of the present invention is realized；
The correspondence diagram of SQNR and backoff when Fig. 2 is modulation system different in the embodiment of the present invention；
Fig. 3 is the flow diagram of the signal processing method based on AGC in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of receiving device in the embodiment of the present invention；
Fig. 5 is the module diagram of receiving device in the embodiment of the present invention；
Fig. 6 is the structure chart of computer installation in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
One step it is described in detail.
Technical solution described herein can be used for receiving device, such as receiver or the terminal comprising receiver are set
It is standby.
Firstly, the part term in the embodiment of the present invention is explained, in order to those skilled in the art understand that.
1) AGC system, for making the automatic control system of amplifying circuit adjusted with signal strength Gain Automaticly.
Fig. 1 is the realization principle figure of existing simulation AGC used by the embodiment of the present invention.3 are defined in simulation AGC
A section: saturation interval (Over-ranging region), operation interval (Operating range region) and signal
Too low section (Under-ranging region).
Wherein, the reception overflow of saturation interval, easily leads to the saturation of receiver, can not receive signal；The too low area of signal
The collection of letters number is excessively weak indirectly, and effectively reception signal can not be differentiated by easily leading to receiver.Therefore, the two sections are all AGC in signal
The section that can not work normally when reception, it should avoid as far as possible.
During reception processing, the input power of AGC is no more than ADCmax, otherwise receive signal saturation；And in order to full
The smallest signal-to-noise ratio (Signal Noise Ratio, SNR) of foot requires, and input power cannot be below Pmin.Simultaneously, it is contemplated that connect
Receiving signal power has shake, and safe clearance (Safety margin) can be set, accordingly even when input signal works higher than AGC
When section, reception processing can also be carried out within the scope of safe clearance, had peak clipping influence of noise, but still can be carried out receiving area
Reason.When the ADC bit of receiving device is higher, quantized interval is smaller, and ADC precision is higher.
2) signal quantization noise ratio (signal-to-quantization noise ratio, SQNR), refers to analog signal
The ratio of useful signal and quantizing noise into digital signal conversion process can be used for illustrating that input signal is quantized processing
Deviation effects afterwards.Its calculation is as follows:
In formula (1), SiIndicate the continuous value of original signal；Si-qAfter indicating the corresponding quantification treatment of original signal from
Value is dissipated, therefore has error S between discrete value and successive valuei-Si-q, molecular moiety represents useful signal mean power, denominator part
Quantizing noise mean power is represented, N is positive integer, and i is the positive integer less than or equal to N.
In practical applications, different safe clearances, i.e. back-off (backoff) value are set, will affect the workspace AGC
Between i.e. quantized interval size, to influence SQNR.For example, under sighting distance (Line-of-Sight, LOS) channel, SQNR and
Backoff corresponding relationship is different.
Fig. 2 is under LOS channel, and when using different modulation systems, the correspondence diagram of SQNR and backoff are schemed
In by taking modulation system BPSK and 64QAM as an example.As shown in Figure 2, when transmitter sends signal using different modulation systems, SQNR
Peak value (black dot in figure) arrive -7dB in -3dB, further according to modulation system, analysis deviates phase from peak point respectively to the left and right
Influence with value to receptivity.Due to smaller, the different modulation system deviant of distance between the planisphere point of high order modulation
May be different, that is, backoff value may also be different.
Therefore, receiver considers the safe clearance that AGC is arranged only according to a kind of modulation system in the prior art, easily influences solution
The precision of tune results even in the reception failure of signal.
In consideration of it, the signal processing method and equipment provided in an embodiment of the present invention based on AGC can pass through default inquiry
Table, to determine the corresponding AGC power back-off parameters of modulation system used by service signal, and then according to determining AGC power
Back-off parameter carries out reception processing to service signal, realize to the transmission information of different modulating mode according to each modulation system phase
The AGC power back-off parameters answered carry out reception processing to signal, so that the received success rate of signal is higher.
Technical solution provided by the present application is described in further detail with reference to the accompanying drawings of the specification.
Fig. 3 be the signal processing method provided in an embodiment of the present invention based on AGC, this method can by receiving device,
The terminal device for being such as provided with receiver realizes that the process of this method is described as follows.
S11: modulation system used by the service signal that sending ending equipment is sent is determined；
S12: according to default inquiry table, at least one corresponding AGC power back-off parameters of modulation system are determined；Wherein, in advance
If the corresponding AGC back-off ginseng of the Different Modulations and every kind of modulation system that record has sending ending equipment to support in inquiry table
Number；
S13: reception processing is carried out to service signal according at least one AGC power back-off parameters.
In the specific implementation process, service signal can be sending ending equipment, and such as terminal device comprising transmitter passes through
The transmission signal for correspondence Mr. Yu's business that Traffic Channel is sent, such as the transmission signal of flow business, the transmission signal of talk business,
Etc..
Receiving device can determine modulation system used by service signal, in practical applications, same business
Service signal may use one or more modulation systems.
For example, the sending ending equipment in communication system can mutually be modulated using 16 orthogonal width for flow business
(16Quadrature Amplitude Modulation, 16QAM) encodes transmission signal, such as in terminal flow
The smaller Shi Caiyong of demand, in the modulation system, a symbology 4bit；Alternatively, sending ending equipment can be orthogonal using 64
Width modulates (64Quadrature Amplitude Modulation, 64QAM) mutually to encode to transmission signal, such as
The flow demand amount of terminal uses when larger, in the modulation system, a symbology 6bit.
Receiving device can enter S12 after determining modulation system used by business information, and default by inquiry
Inquiry table determines the corresponding AGC power back-off parameters of each modulation system (backoff value), the i.e. safe clearance of AGC.
Wherein, it is pre-set to can be receiving device for default inquiry table.Its setting up procedure can be such that
1) receiving device obtains the modulation intelligence that sending ending equipment is sent by control channel, and the modulation intelligence is for referring to
Show the Different Modulations that sending ending equipment is supported；
Wherein, the Different Modulations that sending ending equipment is supported can refer to that communication system is supported
Modulation system.For example, the modulation system that sending ending equipment is supported may include: four phase shift keying (Quadrature Phase
Shift Keying, QPSK), eight phase phase-shift keying (PSK)s (8Phase Shift Keying, 8PSK), 16QAM, 64QAM etc..
2) peak value of the corresponding SQNR of every kind of modulation system in supported Different Modulations is determined；
In practical applications, receiving device can calculate the SQNR of each modulation system according to formula 1, and determine the peak of SQNR
It is worth power, can refer to Fig. 2.
3) according to the peak value of determining SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined.
Specifically, receiving device can determine the corresponding initial rollback power of SQNR after determining the peak value of SQNR
Value and deviant, and then the sum of initial rollback performance number and deviant are determined as the corresponding AGC back-off ginseng of modulation system
Number.
Wherein, initial rollback power can refer to ADC bit number that receiving device is supported according to system and SQNR with
The corresponding relationship of backoff value, the corresponding backoff value of the peak value of identified SQNR.It can also be expected that the initial rollback function
Rate is that system is the rollback performance number counted in advance according to the peak value of the corresponding SQNR of different modulating mode.
Deviant can be receiving device according to link performance analysis, such as converts peak clipping noise or quantizing noise to and is
Noise in system calculates SNR, and determines from peak point influence of the offset identical value to receptivity respectively to the left and right, determines
SNR-BLER curve offset corresponding when meeting the requirements.In practical applications, the method for determination of offset can be using existing
Some methods is realized.
Specifically, in the embodiment of the present invention, when determining offset, carrying out judgement processing to receptivity can be used
But it is not limited only to following manner:
Mode 1: judge to receive the point of planisphere and the deviation of target planisphere whether in given range；
Mode 2: SNR-BLER is judged when the bit error rate is 10%, whether SNR requires rationally, to be unlikely to excessively high.
Receiving device when receptivity meets condition, can the corresponding corresponding SQNR of modulation system offset.
In turn, receiving device calculates the sum of initial rollback power and deviant, obtains the corresponding AGC of corresponding modulation system
Rollback power.
Such as, however, it is determined that the peak value of the corresponding SQNR of modulation system QPSK is 75dB, corresponding backoff value in system
For -3dB, and when SNR-BLER curve is met the requirements, the deviant that QPSK corresponds to acceptable opposite SQNR is -8dB, then
The value of the corresponding AGC rollback power parameter of QPSK is are as follows: -3+ (- 8)=- 11dB.
4) according to the corresponding relationship of modulation system and AGC power back-off parameters, default inquiry table is generated.
Receiving device can establish the corresponding relationship between every kind of modulation system and corresponding AGC power back-off parameters, and
Generate default inquiry table, i.e. modulation system and AGC power back-off parameters corresponding relationship.Hair can have been recorded in the default inquiry table
The value of AGC power back-off parameters corresponding to each modulation system that sending end equipment is supported.For example, table 1 is that record transmitting terminal is set
The default inquiry table of the corresponding relationship of the standby modulation system supported and AGC backoff value, it is subsequent herein to be also referred to as table
Tablemod_bo。
| Modulation system | AGC backoff |
| QPSK | -11dB |
| 16QAM | -12dB |
| 64QAM | -13dB |
| BPSK | -7dB |
Table 1
In practical applications, receiving device can store the table after establishing default inquiry table.
In the embodiment of the present invention, receiving device, can be pre- after determining modulation system used by business information
If inquiring the corresponding AGC power back-off parameters of every kind of modulation system in inquiry table, that is, determines and adjusted used by current business information
At least one AGC power back-off parameters corresponding to mode processed.
For example, if business information is corresponding with 2 kinds of modulation systems: QPSK and 16QAM, can be inquired in preset table this two
The corresponding AGC power back-off parameters of kind modulation system, i.e. AGC backoff value.
In turn, in S13, receiving device can determine the target AGC power at least one AGC power back-off parameters
Back-off parameter, and set target AGC power back-off parameters to the reception power of system, thus, receiving device can be by
Reception and demodulation process are carried out to service signal according to target AGC power back-off parameters.
Wherein, target AGC power back-off parameters can be at least one the smallest AGC function of AGC power back-off parameters intermediate value
Rate back-off parameter.
In an alternative embodiment of the invention, connecing for system is set by target AGC power back-off parameters in receiving device
After receipts power, if it is determined that the modulation system for the service signal that sending ending equipment is sent changes, then can be according to default
Inquiry table determines AGC power back-off parameters corresponding to the modulation system after changing, and is joined according to determining AGC back-off
Number updates the reception power of receiving device.
Wherein, the change of the modulation system of service signal may be the change of business, it is also possible to the change of other reasons,
Such as data volume variation of business, etc..So, it when the business modulation system that sending ending equipment is supported sends and changes, connects
Receiving end equipment may determine that the modulation system and corresponding AGC power back-off parameters whether have been had recorded in default inquiry table.
If it is determined that the modulation system after changing has recorded, then default inquiry table can be directly inquired, determines corresponding AGC function
Rate back-off parameter, and set the AGC backoff value of system to the value of determining AGC power back-off parameters.
If it is determined that the modulation system after changing is not recorded in default inquiry table, then it can determine that this is new according to preceding method
The corresponding GC power back-off parameters of modulation system, and be added in default inquiry table, in turn, by inquiring default inquiry table, really
The corresponding target AGC backoff value of modulation system after fixed change, such as the smallest AGC backoff value (such as after changing
Business modulation system include at least two), or directly by the AGC backoff value of system be set as change after modulation methods
The corresponding AGC backoff value of formula (such as the modulation system after changing is only a kind).
Therefore, the process that signal receives processing in the embodiment of the present invention can be summarized as follows:
A) Different Modulations that the given ADC bit number of system and system are supported are determined, and according to different modulating mode,
Obtain SQNR-backoff curve；
B) according to different modulation systems, the corresponding SQNR peak value of different modulating mode is obtained, then considers to make an uproar in quantization
In the case of sound and peak clipping influence of noise, the deviant of opposite SQNR peak value is set according to receptivity, and calculates different modulating side
The corresponding reasonable AGC backoff value of formula.For example, judging whether planisphere receptivity meets need according to backoff value
It asks；Or according to backoff value, judge to receive SNR-BLER curve performance whether meet demand.
C) by under given ADC bit number, the different modulation system supported in system and AGC backoff value are corresponded to
Table Table is arranged in relationshipmod_bo；
D) it in reception processing, according to the Different Modulations for the support that (such as resource pool) in given resource configures, searches
Record has the table Table of different modulation system and corresponding AGC backoff valuemod_bo；
E) the corresponding AGC backoff of modulation system supported in given resource is searched, therefrom selects backoff the smallest
Value BOmin(i.e. safe clearance is bigger), by BOminIt is set as the backoff value of system；
If f) given in resource, the modulation system of support changes, and comes back to step e) and carries out query processing.
Therefore, in the embodiment of the present invention, the Different Modulations that receiving device can be supported according to system, to given money
The process range of AGC is rationally arranged in the modulation system that source is supported, reduces due to the unreasonable caused saturation of AGC backoff setting
Caused reception failure improves the performance of system.
In the following, in conjunction with above-mentioned steps a) to step f), carry out technical side during the embodiment of the present invention will be further explained by way of example
The application scenarios of case.
Embodiment 1:
Assuming that system supports 3 kinds of modulation systems, respectively QPSK, 16QAM and 64QAM, and the ADC bit supported in system
Number is 10.The modulation intelligence that receiving device is sent according to sending ending equipment by control channel determines each modulation system
SQNR-backoff curve, and the corresponding SQNR peak value of 3 kinds of different modulating modes and initial backoff value are obtained, it is as follows:
1. the peak value of the corresponding SQNR of QPSK is assumed to be 75dB, corresponding backoff value is -3dB；
2. the peak value of the corresponding SQNR of 16QAM is assumed to be 71dB, corresponding backoff value is -6dB；
3. the peak value of the corresponding SQNR of 64QAM is assumed to be 70dB, corresponding backoff value is -7dB；
In turn, receiving device such as converts peak clipping noise or quantizing noise in system according to link performance analysis
Whether noise calculates SNR, is met the requirements according to SNR-BLER curve.
Assuming that the deviant that QPSK corresponds to acceptable opposite SQNR is -8dB, then AGC backoff be -3+ (- 8)=-
11dB；
Assuming that the deviant that 16QAM corresponds to acceptable opposite SQNR is -7dB, then AGC backoff be -6+ (- 7)=-
13dB；
Assuming that the deviant that 64QAM corresponds to acceptable opposite SQNR is -5dB, then AGC backoff be -7+ (- 5)=-
12dB；
Then, by different modulation systems and AGC backoff value correspondence setting table Tablemod_bo, it is as follows:
| Modulation system | AGC backoff |
| QPSK | -11dB |
| 16QAM | -13dB |
| 64QAM | -12dB |
Table 2
Assuming that only supporting QPSK and 16QAM in given resource (such as the first business information), then receiving device searches system
Different modulation systems and AGC backoff value mapping table Table in systemmod_bo, QPSK is obtained in requisition for setting
AGC backoff is -11dB, and 16QAM is -13dB, i.e., 2 kinds for including in system to the AGC backoff in requisition for setting
Modulation system corresponds respectively to different backoff values.At this point, receiving device can compare QPSK and 16QAM, selection is minimum
AGC backoff (BOmin) it is the corresponding AGC backoff of 16QAM, i.e. the AGC backoff of setting system is -13dB.
Embodiment 2: having 2 kinds of modulation systems in system, corresponding backoff value is identical；
Assuming that supporting that 3 kinds of modulation systems are respectively QPSK, 16QAM and 64QAM in system.Assuming that the ADC supported in system
Bit number is 10.The corresponding SQNR peak value of 3 kinds of different modulating modes and initial backoff value that receiving device determines, such as
Under:
1. the peak value of the corresponding SQNR of QPSK is assumed to be 75dB, corresponding backoff value is -3dB；
2. the peak value of the corresponding SQNR of 16QAM is assumed to be 71dB, corresponding backoff value is -6dB；
3. the peak value of the corresponding SQNR of 64QAM is assumed to be 70dB, corresponding backoff value is -7dB；
In turn, receiving device such as utilizes planisphere, judges whether receptivity meets need according to link performance analysis
It asks, with the corresponding bias of each modulation system of determination.
Assuming that the deviant that QPSK corresponds to acceptable opposite SQNR is -8dB, then AGC backoff be -3+ (- 8)=-
11dB；
Assuming that the deviant that 16QAM corresponds to acceptable opposite SQNR is -5dB, then AGC backoff be -6+ (- 5)=-
11dB；
Assuming that the deviant that 64QAM corresponds to acceptable opposite SQNR is -4dB, then AGC backoff be -7+ (- 4)=-
11dB；
By modulation system different in system and AGC backoff value correspondence setting table Tablemod_boIt is as follows:
| Modulation system | AGC backoff |
| QPSK | -11dB |
| 16QAM | -11dB |
| 64QAM | -11dB |
Table 3
Assuming that QPSK and 16QAM is only supported in given resource, different modulation system and AGC in lookup system
Backoff value mapping table Tablemod_bo, compare the corresponding AGC backoff value of QPSK and 16QAM, at this point, due to
The 2 kinds of modulation systems supported correspond respectively to identical AGC backoff value, are -11dB, then the AGC of system is arranged
Backoff is -11dB.
Embodiment 3:
There are 2 kinds of modulation systems in the embodiment, in system, and after setting the backoff value of system, can support modulation system
It changes.
So, on the basis of embodiment 2, it is assumed that 2 kinds of modulation systems of the original support of system are respectively QPSK and 16QAM,
And the AGC backoff for being set system is min { -11, -13 }=- 13dB.But the business modulation system supported due to system
It changes, changes only to support QPSK, at this time inquiry table 3, determine that the corresponding AGC backoff of QPSK is -11dB, then will be
The AGC backoff of system is updated to -11dB.
Fig. 4 is a kind of receiving device provided in an embodiment of the present invention, which, which can be, is provided with receiver
Or the terminal device of transceiver, the receiving device can be used for the step of executing method shown in Fig. 3.The receiving device packet
Include receiver 31 and processor 32.
It should be noted that in practical applications, if receiving device is the terminal comprising transceiver, receiver can
To be located in transceiver, it is not shown in the figure.
Specifically, receiver 31, for determine sending ending equipment send service signal used by modulation system.
Processor 32, for determining at least one corresponding AGC back-off of the modulation system according to inquiry table is preset
Parameter, and reception processing is carried out to the service signal according at least one described AGC power back-off parameters；Wherein, described pre-
If the corresponding AGC power of Different Modulations and every kind of modulation system that record has the sending ending equipment to support in inquiry table returns
Parameter is moved back,
Optionally, the receiver 31 is also used to: according to inquiry table is preset, determining that the modulation system is corresponding at least
Before one AGC power back-off parameters, the modulation intelligence that the sending ending equipment is sent, the modulation are obtained by control channel
Information is used to indicate the Different Modulations that the sending ending equipment is supported；
The processor 32 is also used to: determining signal quantization corresponding to every kind of modulation system in the Different Modulations
The peak value of noise ratio SQNR；According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；And
According to the corresponding relationship of the modulation system and the AGC power back-off parameters, default inquiry table is generated.
Optionally, the processor 32 is used for:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC power of corresponding modulation system to return
Move back parameter.
Optionally, the processor 32 is specifically used for:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
Optionally, the processor 32 is specifically used for:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC
Power back-off parameters.
Optionally, the processor 32 is also used to:
After setting the reception power of the receiving device for the target AGC power back-off parameters, institute is determined
The modulation system for stating the service signal of sending ending equipment transmission changes, and according to the default inquiry table, determines the modulation after changing
AGC power back-off parameters corresponding to mode, and connecing for the receiving device is updated according to determining AGC power back-off parameters
Receive power.
Fig. 5 is the schematic diagram of receiving device provided in an embodiment of the present invention.The receiving device can be comprising receiving
The terminal of device or transceiver, the receiving device may include the first determining module 21, the second determining module 22 and receiving module
23。
First determining module 21 is determined for modulation system used by the service signal of sending ending equipment transmission.
Second determining module 22 can be used for according to preset inquiry table, determine the modulation system it is corresponding at least one
AGC power back-off parameters；Wherein, record has the sending ending equipment to support in the default inquiry table Different Modulations and
The corresponding AGC power back-off parameters of every kind of modulation system.
Receiving module 23 can be used for connecing the service signal according at least one described AGC power back-off parameters
Receipts processing.
Optionally, the receiving device further include:
Module is obtained, for according to inquiry table is preset, determining that at least one corresponding AGC power of the modulation system returns
Before moving back parameter, the modulation intelligence that the sending ending equipment is sent is obtained by control channel, the modulation intelligence is used to indicate
The Different Modulations that the sending ending equipment is supported；
Third determining module, for determining, signal quantization corresponding to every kind of modulation system is made an uproar in the Different Modulations
The peak value of acoustic ratio SQNR；
According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；
According to the corresponding relationship of the modulation system and the AGC power back-off parameters, default inquiry table is generated.
Optionally, second determining module 22 is used for:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC power of corresponding modulation system to return
Move back parameter.
Optionally, second determining module 22 is specifically used for:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
Optionally, second determining module 22 is specifically used for:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC
Power back-off parameters.
Optionally, the receiving device also includes update module,
If second determining module 22 is also used to: setting the reception for the target AGC power back-off parameters
After the reception power of end equipment, determine that the modulation system for the service signal that the sending ending equipment is sent changes, and according to institute
Default inquiry table is stated, determines AGC power back-off parameters corresponding to the modulation system after changing；
Then, the update module is used for: the reception of the receiving device is updated according to determining AGC power back-off parameters
Power.
Fig. 6 is a kind of computer installation provided in an embodiment of the present invention.The computer installation includes processor 10 and storage
Device 20, wherein processor 10 is for realizing exchange method shown in FIG. 1 when executing the computer program stored in memory 20
Step.
Optionally, processor 10 specifically can be central processing unit, application-specific integrated circuit (Application
Specific Integrated Circuit, ASIC), it can be one or more integrated circuits executed for controlling program,
It can be the hardware circuit of use site programmable gate array (Field Programmable Gate Array, FPGA) exploitation,
It can be baseband processor.
Optionally, processor 10 may include at least one processing core.
Optionally, electronic equipment further includes memory 20, and memory 20 may include read-only memory (Read Only
Memory, ROM), random access memory (Random Access Memory, RAM) and magnetic disk storage.Memory 20 is used for
The data required when running of storage processor 10.The quantity of memory 20 is one or more.
Further, a kind of computer readable storage medium is also provided in the embodiment of the present invention, the computer-readable storage medium
Matter is stored with computer instruction, and exchange method as shown in Figure 1 may be implemented when computer instruction is run on computers
Step.
In embodiments of the present invention, it should be understood that disclosed signal processing method and equipment based on AGC, it can be with
It realizes by another way.For example, apparatus embodiments described above are merely indicative, for example, the division of unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be with
In conjunction with or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING of equipment or unit or
Communication connection can be electrical or other forms.
Each functional unit in embodiments of the present invention can integrate in one processing unit or each unit can also
To be independent physical module.
It, can if integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product
To be stored in a computer readable storage medium.Based on this understanding, the technical solution of the embodiment of the present invention is complete
Portion or part can be embodied in the form of software products, which is stored in a storage medium, packet
It includes some instructions to use so that a computer equipment, such as can be personal computer, server or the network equipment etc.,
Or processor (Processor) executes all or part of the steps of the method for each embodiment of the present invention.And storage above-mentioned is situated between
Matter includes: general serial bus USB (Universal Serial Bus flash drive, USB), mobile hard disk, read-only
Memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or
The various media that can store program code such as person's CD.
Above embodiments are only used for that technical solution of the present invention is described in detail, but the explanation of above embodiments is only
It is the method for being used to help understand the embodiment of the present invention, should not be construed as the limitation to the embodiment of the present invention.The art
Any changes or substitutions that can be easily thought of by technical staff, should all cover within the protection scope of the embodiment of the present invention.
Claims (15)
1. a kind of signal processing method based on automatic growth control AGC is applied to receiving device characterized by comprising
Determine modulation system used by the service signal that sending ending equipment is sent；
According to default inquiry table, at least one corresponding AGC power back-off parameters of the modulation system are determined；Wherein, described pre-
If the corresponding AGC power of Different Modulations and every kind of modulation system that record has the sending ending equipment to support in inquiry table returns
Move back parameter；
Reception processing is carried out to the service signal according at least one described AGC power back-off parameters.
2. the method as described in claim 1, which is characterized in that according to inquiry table is preset, determine that the modulation system is corresponding
At least one AGC power back-off parameters before, the method also includes:
The modulation intelligence that the sending ending equipment is sent is obtained by control channel, the modulation intelligence is used to indicate the transmission
The Different Modulations that end equipment is supported；
Determine the peak value of signal quantization noise ratio SQNR corresponding to every kind of modulation system in the Different Modulations；
According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；
According to the corresponding relationship of the modulation system and the AGC power back-off parameters, default inquiry table is generated.
3. method according to claim 2, which is characterized in that according to the peak value of the SQNR, determine each modulation system pair
The AGC power back-off parameters answered, comprising:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC back-off of corresponding modulation system to join
Number.
4. the method as described in claim 1, which is characterized in that according at least one described AGC power back-off parameters to described
Service signal carries out reception processing, comprising:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
5. method as claimed in claim 4, which is characterized in that determine the mesh at least one described AGC power back-off parameters
Mark AGC power back-off parameters, comprising:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC power
Back-off parameter.
6. method as described in claim 4 or 5, which is characterized in that setting institute for the target AGC power back-off parameters
After the reception power for stating receiving device, the method also includes:
Determine that the modulation system for the service signal that the sending ending equipment is sent changes；
According to the default inquiry table, AGC power back-off parameters corresponding to the modulation system after changing are determined；
The reception power of the receiving device is updated according to determining AGC power back-off parameters.
7. a kind of receiving device characterized by comprising
Receiver, for determine sending ending equipment send service signal used by modulation system；
Processor, for determining at least one corresponding AGC power back-off parameters of the modulation system according to inquiry table is preset,
And reception processing is carried out to the service signal according at least one described AGC power back-off parameters；Wherein, the default inquiry
The corresponding AGC back-off ginseng of the Different Modulations and every kind of modulation system that record has the sending ending equipment to support in table
Number.
8. receiving device as claimed in claim 7, which is characterized in that
The receiver is also used to: according to inquiry table is preset, determining that at least one corresponding AGC power of the modulation system returns
Before moving back parameter, the modulation intelligence that the sending ending equipment is sent is obtained by control channel, the modulation intelligence is used to indicate
The Different Modulations that the sending ending equipment is supported；
The processor is also used to: determining signal quantization noise ratio corresponding to every kind of modulation system in the Different Modulations
The peak value of SQNR；According to the peak value of the SQNR, the corresponding AGC power back-off parameters of corresponding modulation system are determined；And according to institute
The corresponding relationship of modulation system Yu the AGC power back-off parameters is stated, default inquiry table is generated.
9. receiving device as claimed in claim 8, which is characterized in that the processor is used for:
Determine the corresponding initial rollback performance number of the peak value of the SQNR and the corresponding deviant of the SQNR；
The sum of the initial rollback performance number and described deviant are determined as the corresponding AGC back-off of corresponding modulation system to join
Number.
10. receiving device as claimed in claim 7, which is characterized in that the processor is specifically used for:
Determine the target AGC power back-off parameters at least one described AGC power back-off parameters；
Set the target AGC power back-off parameters to the reception power of the receiving device；
Reception and demodulation process are carried out to the service signal according to the target AGC power back-off parameters.
11. receiving device as claimed in claim 10, which is characterized in that the processor is specifically used for:
Determine that at least one described the smallest AGC power back-off parameters of AGC power back-off parameters intermediate value are the target AGC power
Back-off parameter.
12. receiving device as described in claim 10 or 11, which is characterized in that the processor is also used to:
After setting the reception power of the receiving device for the target AGC power back-off parameters, the hair is determined
The modulation system for the service signal that sending end equipment is sent changes, and according to the default inquiry table, determines the modulation system after changing
Corresponding AGC power back-off parameters, and update according to determining AGC power back-off parameters the reception function of the receiving device
Rate.
13. a kind of receiving device characterized by comprising
First determining module, for determine sending ending equipment send service signal used by modulation system；
Second determining module, for determining at least one corresponding AGC back-off of the modulation system according to inquiry table is preset
Parameter；Wherein, the Different Modulations and every kind of modulation methods that record has the sending ending equipment to support in the default inquiry table
The corresponding AGC power back-off parameters of formula；
Receiving module, for carrying out reception processing to the service signal according at least one described AGC power back-off parameters.
14. a kind of computer installation, which is characterized in that the computer installation includes processor, and the processor is for executing
The step of method as described in any one of claim 1-6 is realized when the computer program stored in memory.
15. a kind of readable storage medium storing program for executing, is stored thereon with computer program, it is characterised in that: the computer program is processed
The step of method as described in any one of claim 1-6 is realized when device executes.
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| CN111901048A (en) * | 2020-07-31 | 2020-11-06 | 深圳市西迪特科技有限公司 | Gain adjusting method of optical receiver |
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