CN105450564A - Signal processing method and electronic equipment - Google Patents
Signal processing method and electronic equipment Download PDFInfo
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- CN105450564A CN105450564A CN201410364784.6A CN201410364784A CN105450564A CN 105450564 A CN105450564 A CN 105450564A CN 201410364784 A CN201410364784 A CN 201410364784A CN 105450564 A CN105450564 A CN 105450564A
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Abstract
The invention discloses a signal processing method and electronic equipment. The electronic equipment comprises a signal processing unit, wherein the signal processing unit supports demodulation of a symbol sequence of a signal frame. The method comprises the following steps: receiving the symbol sequence by the signal processing unit; grouping the symbol sequence received currently to obtain N symbol groups, wherein the symbol groups comprise M symbols, M and N being an integer larger than 2; judging whether the signal frame arrives according to the symbol groups; and when judging that the signal frame arrives, carrying out compensation on data sequences in the signal frame received after the symbol sequence according to the symbol groups. According to the technical scheme, signal processing time delay can be reduced, and power consumption of the electronic equipment is saved.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of signal processing method and electronic equipment.
Background technology
At present, the receiver in electronic equipment when detecting that radio frame signal arrives just in triggered receiver corresponding signal processing unit carry out demodulation, to reduce receiver oneself power consumption;
Due to receiver the radio frame signal of reception is transformed to baseband signal from radiofrequency signal time, frequency mixer inevitably can introduce local oscillation signal, cause occurring direct current biasing in baseband signal, interference is caused to baseband signal, therefore be necessary to compensate the direct current biasing in baseband signal before to modulation demodulation process, in order to avoid affect the demodulation of useful signal.
In correlation technique, when estimation compensation is carried out to direct current biasing, need complete receive a radio frame signal after, just utilize the estimated value obtained according to a radio frames to compensate direct current biasing, cause the process of receiver to occur time delay, have impact on the performance of receiver.
Summary of the invention
The embodiment of the present invention provides a kind of signal processing method and electronic equipment, can reduce signal transacting time delay, save the power consumption of electronic equipment.
The technical scheme of the embodiment of the present invention is achieved in that
The embodiment of the present invention provides a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; Described method comprises:
Described signal processing unit receiving symbol sequence;
Current received symbol sebolic addressing is divided into groups, obtains N number of symbol packets; Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2;
According to described symbol packets, judge whether signal frame arrives;
When judging that signal frame arrives, according to described symbol packets, the data sequence in signal frame received after described symbol sebolic addressing is compensated.
Preferably, described according to described symbol packets, judge whether signal frame arrives, and comprising:
Judge that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively;
When judging that at least T adjacent symbol packets arrives decision signal frame time corresponding with the targeting sequencing of signal frame; Otherwise decision signal frame does not arrive, T is the integer being more than or equal to 2 and being less than or equal to N.
Preferably, describedly judge that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively, comprising:
Be added after two sign bit conjugate multiplication corresponding in described symbol packets, when obtained value is greater than first threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame; Or,
Be added after symbol conjugate multiplication corresponding with known preamble for symbol each in described symbol packets, when obtained value is greater than Second Threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame.
Preferably, describedly judge that whether described symbol packets is corresponding with the targeting sequencing of signal frame, comprising:
Determine the average power of symbol in described symbol packets;
When described average power is greater than the 3rd threshold value, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame;
Wherein, described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing.
Preferably, described according to described symbol packets, the data sequence in signal frame received after described symbol sebolic addressing is compensated, comprising:
At least T symbol packets described in described basis, determines the first offset;
By the symbol in symbol sebolic addressing received after described N number of adjacent-symbol grouping, deduct described first offset.
Preferably, at least T symbol packets described in described basis, determine the first offset, comprising:
Symbol in described at least T adjacent-symbol grouping is added up, obtains accumulated value A;
Determine that described first offset is A/ (T × M).
The embodiment of the present invention also provides a kind of electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame;
Described signal processing unit comprises:
Receiver module, for receiving symbol sequence;
Grouping module, for being divided into groups by symbol sebolic addressing current received for described receiver module, obtains N number of symbol packets; Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2;
Judge module, for according to described symbol packets, judges whether signal frame arrives;
Compensating module, for when judging that signal frame arrives, according to described symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
Preferably, described grouping module, also for judging that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively;
When judging that at least T adjacent symbol packets arrives decision signal frame time corresponding with the targeting sequencing of signal frame; Otherwise decision signal frame does not arrive, T is the integer being more than or equal to 2 and being less than or equal to N.
Preferably, described judge module, also for one of in the following ways judging whether signal frame arrives:
Be added after two sign bit conjugate multiplication corresponding in described symbol packets, when obtained value is greater than first threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame;
Be added after symbol conjugate multiplication corresponding with known preamble for symbol each in described symbol packets, when obtained value is greater than Second Threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame.
Preferably, described judge module, also for judging that whether described symbol packets is corresponding with the targeting sequencing of signal frame in the following ways:
Determine the average power of symbol in described symbol packets; When described average power is greater than the 3rd threshold value, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame; Wherein, described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing.
Preferably, described compensating module, also for according to a described at least T symbol packets, determines the first offset; By the symbol in symbol sebolic addressing received after described N number of adjacent-symbol grouping, deduct described first offset.
Preferably, described compensating module, also for being added up by the symbol in described at least T adjacent-symbol grouping, obtains accumulated value A; Determine that described first offset is A/ (T × M).
In the embodiment of the present invention, whether signal frame arrives to utilize symbol packets to judge, and when determining that signal frame arrives, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Accompanying drawing explanation
Fig. 1 is the realization flow schematic diagram of signal processing method in the embodiment of the present invention one;
Fig. 2 is the realization flow schematic diagram of signal processing method in the embodiment of the present invention two;
Fig. 3 is the realization flow schematic diagram of signal processing method in the embodiment of the present invention three;
Fig. 4 is the realization flow schematic diagram of signal processing method in the embodiment of the present invention four;
Fig. 5 is the realization flow schematic diagram of signal processing method in the embodiment of the present invention five;
Fig. 6 is the realization flow schematic diagram of signal processing method in the embodiment of the present invention six;
Fig. 7 a is the structural representation one of electronic equipment in the embodiment of the present invention seven;
Fig. 7 b is the structural representation two of electronic equipment in the embodiment of the present invention seven;
Fig. 7 c is the structural representation of electronic equipment signal processing unit in the embodiment of the present invention seven.
Embodiment
Inventor finds in the practice of the invention, correlation technique is always after receiving a frame complete signal, the estimated value just obtained according to a signal frame, and utilize estimated value to compensate direct current biasing, cause signal transacting to occur higher time delay, thus have impact on the signal transacting performance of electronic equipment; Inventor also finds in the practice of the invention, if divided into groups to the symbol sebolic addressing of signal frame, grouping then can be utilized to detect frame head, namely whether detection signal frame arrives, and then direct current biasing compensation is carried out in the grouping to symbol sebolic addressing received when utilizing frame head to arrive, then can obviously reduce signal transacting time delay.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment one
The present embodiment records a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; In practical application, described signal processing unit can be realized by the digital signal processor (DSP, DigitalSignalProcessor) of electronic equipment or logic programmable gate array (FPGA, Field-ProgrammableGateArray);
As shown in Figure 1, the information processing method that the present embodiment is recorded comprises the following steps:
Step 101, described signal processing unit receiving symbol sequence.
Here, due to electronic equipment the signal frame (can for radio frames) received is transformed to baseband signal from radiofrequency signal time, frequency mixer in electronic equipment inevitably can introduce local oscillation signal in baseband signal is converged, cause occurring direct current biasing in baseband signal, thus result in and meeting in sequence that signal processing unit receives also there is direct current biasing.
Step 102, divides into groups current received symbol sebolic addressing, obtains N number of symbol packets.
Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2.
Step 103, according to described symbol packets, judges whether signal frame arrives, if arrived, then performs step 104; Otherwise return step 101.
Step 104, according to described symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
In the present embodiment, when arriving according to symbol packets determination signal frame, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Embodiment two
The present embodiment records a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; In practical application, described signal processing unit can be realized by the digital signal processor (DSP, DigitalSignalProcessor) of electronic equipment or logic programmable gate array (FPGA, Field-ProgrammableGateArray);
As shown in Figure 2, the information processing method that the present embodiment is recorded comprises the following steps:
Step 201, described signal processing unit receiving symbol sequence.
Here, due to electronic equipment the signal frame (can for radio frames) received is transformed to baseband signal from radiofrequency signal time, frequency mixer in electronic equipment inevitably can introduce local oscillation signal in baseband signal is converged, cause occurring direct current biasing in baseband signal, thus result in and meeting in sequence that signal processing unit receives also there is direct current biasing.
Step 202, divides into groups current received symbol sebolic addressing, obtains N number of symbol packets.
Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2.
Step 203, judges that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively.
Step 204, based on the judged result of step 203, judges whether to exist the individual adjacent symbol packets of at least T corresponding with the targeting sequencing of signal frame, if existed, then performs step 205; Otherwise, return step 201.
Wherein, T is the integer being more than or equal to 2 and being less than or equal to N, inventor finds in the practice of the invention, when the targeting sequencing that there is at least T adjacent symbol packets and signal frame to time corresponding show that signal processing unit has been currently received the frame head of signal frame, in this way, can efficiently promptly detect (also namely whether signal frame is arrived and detect) the frame head of signal frame, when detecting that signal frame arrives, immediately direct current biasing compensation can be carried out according to symbol packets, compared with correlation technique, reduce the time delay of signal transacting.
Step 205, according to a described at least T symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
In the present embodiment, when arriving according to symbol packets determination signal frame, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Embodiment three
The present embodiment records a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; In practical application, described signal processing unit can be realized by the digital signal processor (DSP, DigitalSignalProcessor) of electronic equipment or logic programmable gate array (FPGA, Field-ProgrammableGateArray);
As shown in Figure 3, the information processing method that the present embodiment is recorded comprises the following steps:
Step 301, described signal processing unit receiving symbol sequence.
Here, due to electronic equipment the signal frame (can for radio frames) received is transformed to baseband signal from radiofrequency signal time, frequency mixer in electronic equipment inevitably can introduce local oscillation signal in baseband signal is converged, cause occurring direct current biasing in baseband signal, thus result in and meeting in sequence that signal processing unit receives also there is direct current biasing.
Step 302, divides into groups current received symbol sebolic addressing, obtains N number of symbol packets.
Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2.
Step 303, for each symbol packets in N number of symbol packets, is added after two sign bit conjugate multiplication corresponding in each symbol packets, when obtained value is greater than first threshold, performs step 304; Otherwise perform step 305.
For the symbol packets r (i+n) comprising M symbol, i value meets m-1≤i≤0, if being added obtained value after two sign bit conjugate multiplication corresponding in this symbol packets is that R (n), R (n) can represent with formula (1):
Wherein, " * " is conjugate operation symbol; Because targeting sequencing has obvious autocorrelation, therefore the auto-correlation function of targeting sequencing shows as the form of impulse function, namely there is very strong self correlated peak, so can self correlated peak be detected by arranging first threshold, the symbol sebolic addressing that targeting sequencing is corresponding also namely being detected.
Step 304, judges that described symbol packets is corresponding with the targeting sequencing of signal frame.
Step 305, judges that described symbol packets is not corresponding with the targeting sequencing of signal frame.
Step 303 to step 305 is the operation carried out successively to N number of symbol packets, to judge that whether N number of symbol packets is corresponding with the targeting sequencing of signal frame.
Step 306, based on the judged result of step 304 or step 305, judges whether to exist at least T adjacent symbol packets corresponding with the targeting sequencing of signal frame, if existence, then and execution step 307; Otherwise, return step 301.
Wherein, T is the integer being more than or equal to 2 and being less than or equal to N, inventor finds in the practice of the invention, when the targeting sequencing that there is at least T adjacent symbol packets and signal frame to time corresponding show that signal processing unit has been currently received the frame head of signal frame, in this way, can efficiently promptly detect (also namely whether signal frame is arrived and detect) the frame head of signal frame, when detecting that signal frame arrives, immediately direct current biasing compensation can be carried out according to symbol packets, compared with correlation technique, reduce the time delay of signal transacting.
Step 307, according to a described at least T symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
In the present embodiment, when arriving according to symbol packets determination signal frame, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Embodiment four
The present embodiment records a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; In practical application, described signal processing unit can be realized by the digital signal processor (DSP, DigitalSignalProcessor) of electronic equipment or logic programmable gate array (FPGA, Field-ProgrammableGateArray);
As shown in Figure 4, the information processing method that the present embodiment is recorded comprises the following steps:
Step 401, described signal processing unit receiving symbol sequence.
Here, due to electronic equipment the signal frame (can for radio frames) received is transformed to baseband signal from radiofrequency signal time, frequency mixer in electronic equipment inevitably can introduce local oscillation signal in baseband signal is converged, cause occurring direct current biasing in baseband signal, thus result in and meeting in sequence that signal processing unit receives also there is direct current biasing.
Step 402, divides into groups current received symbol sebolic addressing, obtains N number of symbol packets.
Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2.
Step 403, is added after symbol conjugate multiplication corresponding with known preamble for symbol each in described symbol packets, when obtained value is greater than Second Threshold, performs step 404; Otherwise, perform step 405.
For the symbol packets r (i+n) comprising M symbol, if being added obtained value after the symbol conjugate multiplication that this symbol packets is corresponding with known preamble a (i+n) is C (n), i value meets m-1≤i≤0, then C (n) can represent with formula (2):
Wherein, " * " is conjugate operation symbol; Because targeting sequencing has obvious cross correlation, therefore the cross-correlation function of targeting sequencing shows as the form of impulse function, namely having and have very strong cross-correlation peak, so cross-correlation peak can be detected by arranging Second Threshold, the symbol sebolic addressing that targeting sequencing is corresponding also namely being detected.
Step 404, judges that described symbol packets is corresponding with the targeting sequencing of signal frame.
Step 405, judges that described symbol packets is not corresponding with the targeting sequencing of signal frame.
Step 403 to step 405 is the operation carried out successively to N number of symbol packets, to judge that whether N number of symbol packets is corresponding with the targeting sequencing of signal frame.
Step 406, based on the judged result of step 404 or step 405, judges whether to exist at least T adjacent symbol packets corresponding with the targeting sequencing of signal frame, if existence, then and execution step 407; Otherwise, return step 401.
Wherein, T is the integer being more than or equal to 2 and being less than or equal to N, inventor finds in the practice of the invention, when the targeting sequencing that there is at least T adjacent symbol packets and signal frame to time corresponding show that signal processing unit has been currently received the frame head of signal frame, in this way, can efficiently promptly detect (also namely whether signal frame is arrived and detect) the frame head of signal frame, when detecting that signal frame arrives, immediately direct current biasing compensation can be carried out according to symbol packets, compared with correlation technique, reduce the time delay of signal transacting.
Step 407, according to a described at least T symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
In the present embodiment, when arriving according to symbol packets determination signal frame, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Embodiment five
The present embodiment records a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; In practical application, described signal processing unit can be realized by the digital signal processor (DSP, DigitalSignalProcessor) of electronic equipment or logic programmable gate array (FPGA, Field-ProgrammableGateArray);
As shown in Figure 5, the information processing method that the present embodiment is recorded comprises the following steps:
Step 501, described signal processing unit receiving symbol sequence.
Here, due to electronic equipment the signal frame (can for radio frames) received is transformed to baseband signal from radiofrequency signal time, frequency mixer in electronic equipment inevitably can introduce local oscillation signal in baseband signal is converged, cause occurring direct current biasing in baseband signal, thus result in and meeting in sequence that signal processing unit receives also there is direct current biasing.
Step 502, divides into groups current received symbol sebolic addressing, obtains N number of symbol packets.
Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2.
Step 503, determines the average power of symbol in described symbol packets.
Step 504, judges whether described average power is greater than the 3rd threshold value, if be greater than, then performs step 504; Otherwise, perform step 505.
Step 505, judges that described symbol packets is corresponding with the targeting sequencing of signal frame.
Step 506, judges that described symbol packets is not corresponding with the targeting sequencing of signal frame.
Described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing, inventor finds in the practice of the invention, the average power of targeting sequencing is always greater than the power of noise, therefore, can whether with targeting sequencing corresponding by arranging the 3rd threshold value being greater than noise power if carrying out detected symbol.
Step 504 to step 506 is the operation carried out successively to N number of symbol packets, to judge that whether N number of symbol packets is corresponding with the targeting sequencing of signal frame.
Step 507, based on the judged result of step 505 or step 506, judges whether to exist at least T adjacent symbol packets corresponding with the targeting sequencing of signal frame, if existence, then and execution step 508; Otherwise, return step 501.
Wherein, T be more than or equal to 2 integer, inventor finds in the practice of the invention, when the targeting sequencing that there is at least T adjacent symbol packets and signal frame to time corresponding show that signal processing unit has been currently received the frame head of signal frame, in this way, can efficiently promptly detect (also namely whether signal frame is arrived and detect) the frame head of signal frame, when detecting that signal frame arrives, immediately direct current biasing compensation can be carried out according to symbol packets, compared with correlation technique, reduce the time delay of signal transacting.
Step 507, according to a described at least T symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
In the present embodiment, when arriving according to symbol packets determination signal frame, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Embodiment six
The present embodiment records a kind of signal processing method, is applied in electronic equipment, and described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; In practical application, described signal processing unit can be realized by the digital signal processor (DSP, DigitalSignalProcessor) of electronic equipment or logic programmable gate array (FPGA, Field-ProgrammableGateArray);
As shown in Figure 6, the information processing method that the present embodiment is recorded comprises the following steps:
Step 601, described signal processing unit receiving symbol sequence.
Here, due to electronic equipment the signal frame (can for radio frames) received is transformed to baseband signal from radiofrequency signal time, frequency mixer in electronic equipment inevitably can introduce local oscillation signal in baseband signal is converged, cause occurring direct current biasing in baseband signal, thus result in and meeting in sequence that signal processing unit receives also there is direct current biasing.
Step 602, divides into groups current received symbol sebolic addressing, obtains N number of symbol packets.
Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2.
Step 603, determines the average power of symbol in described symbol packets.
Step 604, when described average power is greater than the 3rd threshold value, performs step 605; Otherwise, perform step 606.
Step 605, judges that described symbol packets is corresponding with the targeting sequencing of signal frame.
Step 606, judges that described symbol packets is not corresponding with the targeting sequencing of signal frame.
Described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing, inventor finds in the practice of the invention, the average power of targeting sequencing is always greater than the power of noise, therefore, can whether with targeting sequencing corresponding by arranging the 3rd threshold value being greater than noise power if carrying out detected symbol.
Step 604 to step 606 is the operation carried out successively to N number of symbol packets, to judge that whether N number of symbol packets is corresponding with the targeting sequencing of signal frame.
Step 607, based on the judged result of step 605 or step 605, judges whether to exist at least T adjacent symbol packets corresponding with the targeting sequencing of signal frame, if existence, then and execution step 608; Otherwise, return step 601.
Wherein, T is the integer being more than or equal to 2 and being less than or equal to N, inventor finds in the practice of the invention, when the targeting sequencing that there is at least T adjacent symbol packets and signal frame to time corresponding show that signal processing unit has been currently received the frame head of signal frame, in this way, can efficiently promptly detect (also namely whether signal frame is arrived and detect) the frame head of signal frame, when detecting that signal frame arrives, immediately direct current biasing compensation can be carried out according to symbol packets, compared with correlation technique, reduce the time delay of signal transacting.
Step 608, adds up the symbol in described at least T adjacent-symbol grouping, obtains accumulated value A, determine that described first offset is A/ (T × M).
Step 609, by the symbol in symbol sebolic addressing received after described N number of adjacent-symbol grouping, deducts described first offset.
It should be noted that, when step 609 is for detecting that the frame head of signal frame and signal frame arrive, the direct current biasing that the data symbol of the frame of the signal arrived carries out being compensated; In practical application, when being detected that by step 601 to step 607 new signal frame arrives, correspondingly can also perform step 608 to step 609, direct current biasing compensation is carried out to the data symbol sequence of new signal frame.
In the present embodiment, when arriving according to symbol packets determination signal frame, according to symbol packets, direct current biasing compensation is carried out to the data sequence of subsequently received signal frame, avoid in correlation technique the situation needing just to calculate direct current biasing offset after receiving a complete frame signal, compared to correlation technique, there is lower processing delay, thus reduce the time delay of electronic equipment to signal transacting on the whole, improve the performance of signal transacting; Simultaneously, due to signal frame arrive time, the present embodiment utilizes the offset of current received symbol packets determination direct current biasing immediately, after receiving a frame signal, reading a frame signal again with correlation technique calculates compared with direct current biasing offset, treatment effeciency is higher, can reduce the power consumption of electronic equipment.
Embodiment seven
The present embodiment records a kind of electronic equipment, and as shown in Figure 7a, described electronic equipment comprises a signal processing unit 71, and described signal processing unit 71 is supported to carry out demodulation to the symbol sebolic addressing of signal frame;
As an execution mode, as shown in Figure 7b, described electronic equipment can also comprise buffer unit 72, for symbol sebolic addressing described in buffer memory.
As an execution mode, as shown in Figure 7 c, described signal processing unit 71 can comprise:
Receiver module 711, for receiving symbol sequence;
Grouping module 712, for being divided into groups by symbol sebolic addressing current received for described receiver module 711, obtains N number of symbol packets; Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2;
Judge module 713, for according to described symbol packets, judges whether signal frame arrives;
Compensating module 714, for when judging that signal frame arrives, according to described symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
As an execution mode, described grouping module 712, also for judging that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively;
When judging that at least T adjacent symbol packets arrives decision signal frame time corresponding with the targeting sequencing of signal frame; Otherwise decision signal frame does not arrive, T is the integer being more than or equal to 2 and being less than or equal to N.
As an execution mode, described judge module 713, also for one of in the following ways judging whether signal frame arrives:
Be added after two sign bit conjugate multiplication corresponding in described symbol packets, when obtained value is greater than first threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame;
Be added after symbol conjugate multiplication corresponding with known preamble for symbol each in described symbol packets, when obtained value is greater than Second Threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame.
As an execution mode, described judge module 713, also for judging that whether described symbol packets is corresponding with the targeting sequencing of signal frame in the following ways:
Determine the average power of symbol in described symbol packets; When described average power is greater than the 3rd threshold value, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame; Wherein, described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing.
As an execution mode, described compensating module 714, also for according to a described at least T symbol packets, determines the first offset; By the symbol in symbol sebolic addressing received after described N number of adjacent-symbol grouping, deduct described first offset.
As an execution mode, described compensating module 714, also for being added up by the symbol in described at least T adjacent-symbol grouping, obtains accumulated value A; Determine that described first offset is A/ (T × M).
In practical application, signal processing unit 71 can be realized by the FPGA in electronic equipment, and buffer unit 72 can be realized by the RAM in electronic equipment.
In several embodiment provided by the present invention, should be understood that, disclosed equipment and method, can realize by another way.Apparatus embodiments described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, and as: multiple unit or assembly can be in conjunction with, maybe can be integrated into another system, or some features can be ignored, or do not perform.In addition, the coupling each other of shown or discussed each part or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of equipment or unit or communication connection can be electrical, machinery or other form.
The above-mentioned unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, also can be distributed in multiple network element; Part or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in various embodiments of the present invention can all be integrated in a processing unit, also can be each unit individually as a unit, also can two or more unit in a unit integrated; Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: movable storage device, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
Or, if the above-mentioned integrated unit of the present invention using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.According to such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprises some instructions and performs all or part of of method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server or the network equipment etc.).And aforesaid storage medium comprises: movable storage device, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (12)
1. a signal processing method, is applied in electronic equipment, it is characterized in that, described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame; Described method comprises:
Described signal processing unit receiving symbol sequence;
Current received symbol sebolic addressing is divided into groups, obtains N number of symbol packets; Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2;
According to described symbol packets, judge whether signal frame arrives;
When judging that signal frame arrives, according to described symbol packets, the data sequence in signal frame received after described symbol sebolic addressing is compensated.
2. method according to claim 1, is characterized in that, described according to described symbol packets, judges whether signal frame arrives, and comprising:
Judge that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively;
When judging that at least T adjacent symbol packets arrives decision signal frame time corresponding with the targeting sequencing of signal frame; Otherwise decision signal frame does not arrive, T is the integer being more than or equal to 2 and being less than or equal to N.
3. method according to claim 2, is characterized in that, describedly judges that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively, comprising:
Be added after two sign bit conjugate multiplication corresponding in described symbol packets, when obtained value is greater than first threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame; Or,
Be added after symbol conjugate multiplication corresponding with known preamble for symbol each in described symbol packets, when obtained value is greater than Second Threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame.
4. method according to claim 2, is characterized in that, describedly judges that whether described symbol packets is corresponding with the targeting sequencing of signal frame, comprising:
Determine the average power of symbol in described symbol packets;
When described average power is greater than the 3rd threshold value, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame;
Wherein, described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing.
5. the method according to any one of claim 2 to 4, is characterized in that, described according to described symbol packets, compensates, comprising the data sequence in signal frame received after described symbol sebolic addressing:
At least T symbol packets described in described basis, determines the first offset;
By the symbol in symbol sebolic addressing received after described N number of adjacent-symbol grouping, deduct described first offset.
6. method according to claim 5, is characterized in that, at least T symbol packets described in described basis, determines the first offset, comprising:
Symbol in described at least T adjacent-symbol grouping is added up, obtains accumulated value A;
Determine that described first offset is A/ (T × M).
7. an electronic equipment, is characterized in that, described electronic equipment comprises a signal processing unit, and described signal processing unit support carries out demodulation to the symbol sebolic addressing of signal frame;
Described signal processing unit comprises:
Receiver module, for receiving symbol sequence;
Grouping module, for being divided into groups by symbol sebolic addressing current received for described receiver module, obtains N number of symbol packets; Wherein, described symbol packets comprises M symbol, and M, N are the integer being greater than 2;
Judge module, for according to described symbol packets, judges whether signal frame arrives;
Compensating module, for when judging that signal frame arrives, according to described symbol packets, compensates the data sequence in signal frame received after described symbol sebolic addressing.
8. electronic equipment according to claim 7, is characterized in that,
Described grouping module, also for judging that whether described N number of symbol packets is corresponding with the targeting sequencing of signal frame successively;
When judging that at least T adjacent symbol packets arrives decision signal frame time corresponding with the targeting sequencing of signal frame; Otherwise decision signal frame does not arrive, T is the integer being more than or equal to 2 and being less than or equal to N.
9. electronic equipment according to claim 8, is characterized in that,
Described judge module, also for one of in the following ways judging whether signal frame arrives:
Be added after two sign bit conjugate multiplication corresponding in described symbol packets, when obtained value is greater than first threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame;
Be added after symbol conjugate multiplication corresponding with known preamble for symbol each in described symbol packets, when obtained value is greater than Second Threshold, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame.
10. electronic equipment according to claim 8, is characterized in that,
Described judge module, also for judging that whether described symbol packets is corresponding with the targeting sequencing of signal frame in the following ways:
Determine the average power of symbol in described symbol packets; When described average power is greater than the 3rd threshold value, judge that described symbol packets is corresponding with the targeting sequencing of signal frame; Otherwise, judge that described symbol packets is not corresponding with the targeting sequencing of signal frame; Wherein, described 3rd threshold value is greater than the average power of noise in described symbol sebolic addressing.
Electronic equipment described in 11. any one of according to Claim 8 to 10, is characterized in that, described compensating module, also for according to a described at least T symbol packets, determines the first offset; By the symbol in symbol sebolic addressing received after described N number of adjacent-symbol grouping, deduct described first offset.
12. electronic equipments according to claim 11, is characterized in that, described compensating module, also for being added up by the symbol in described at least T adjacent-symbol grouping, obtain accumulated value A; Determine that described first offset is A/ (T × M).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040240A (en) * | 2017-03-21 | 2017-08-11 | 四川九洲电器集团有限责任公司 | A kind of digital signal processing method and equipment |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097813A1 (en) * | 2001-01-22 | 2002-07-25 | Philips Electronics North America Corporation. | System and method for providing frequency domain synchronization for single carrier signals |
| CN101076004A (en) * | 2006-05-16 | 2007-11-21 | 索尼株式会社 | Wireless communication device |
| CN101079688A (en) * | 2006-05-23 | 2007-11-28 | 中兴通讯股份有限公司 | A synchronization method in orthogonal frequency division multiplexing system |
| CN101304256A (en) * | 2008-07-08 | 2008-11-12 | 北京天碁科技有限公司 | Method for eliminating direct current bias |
| CN101406017A (en) * | 2006-03-29 | 2009-04-08 | Posdata株式会社 | Apparatus for estimating and compensating carrier frequency offset and data receiving method in receiver of wireless communication system |
| CN101431498A (en) * | 2008-12-02 | 2009-05-13 | 清华大学 | Demodulation method and device for flexible sub-carrier modulation system |
| CN101778066A (en) * | 2009-12-31 | 2010-07-14 | 北京交通大学 | Physical layer preamble optimization-based synchronization method and system |
| CN102123116A (en) * | 2011-03-11 | 2011-07-13 | 京信通信***（中国）有限公司 | Direct-current offset calibration method and device |
| CN102255865A (en) * | 2011-09-02 | 2011-11-23 | 东南大学 | Frame head sequence based channel estimating method for orthogonal frequency division multiplexing ultra-wideband system |
| CN102412866A (en) * | 2011-11-23 | 2012-04-11 | 北京泰美世纪科技有限公司 | Joint estimation method and system for carrier frequency offset, frame head phase position and fine symbol timing |
| CN102480452A (en) * | 2010-11-26 | 2012-05-30 | 中国科学院微电子研究所 | Carrier frequency synchronization circuit and method of OFDM system |
| CN102497339A (en) * | 2011-12-12 | 2012-06-13 | 安徽省菲特科技股份有限公司 | Frequency deviation estimating method in QAM (quadrature amplitude modulation) communication system |
| CN102546514A (en) * | 2012-01-21 | 2012-07-04 | 北京邮电大学 | Frequency synchronization method and equipment for OFDM system |
| CN102801673A (en) * | 2012-08-16 | 2012-11-28 | 苏州英菲泰尔电子科技有限公司 | Quick carrier synchronizing method for FSK signal coherent demodulation |
| CN103152308A (en) * | 2013-03-04 | 2013-06-12 | 北京科技大学 | Joint estimation method of frequency offset, DC (Direct Current) and imbalance of orthogonal frequency division multiplexing system |
| CN103227764A (en) * | 2012-12-14 | 2013-07-31 | 西安英菲泰尔电子科技有限公司 | Rapid carrier synchronization method for carrying out coherent demodulation on burst transmission signal |
| CN103248593A (en) * | 2012-02-09 | 2013-08-14 | 泰凌微电子（上海）有限公司 | Method and system for frequency offset estimation and elimination |
| CN103327516A (en) * | 2013-05-21 | 2013-09-25 | 上海晨思电子科技有限公司 | Method and device for detecting main synchronizing signals |
| CN103516659A (en) * | 2013-10-23 | 2014-01-15 | 北京科技大学 | Method for estimating carrier frequency offset of OFDM system with time varying direct current offset |
-
2014
- 2014-07-28 CN CN201410364784.6A patent/CN105450564B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097813A1 (en) * | 2001-01-22 | 2002-07-25 | Philips Electronics North America Corporation. | System and method for providing frequency domain synchronization for single carrier signals |
| CN101406017A (en) * | 2006-03-29 | 2009-04-08 | Posdata株式会社 | Apparatus for estimating and compensating carrier frequency offset and data receiving method in receiver of wireless communication system |
| CN101076004A (en) * | 2006-05-16 | 2007-11-21 | 索尼株式会社 | Wireless communication device |
| CN101079688A (en) * | 2006-05-23 | 2007-11-28 | 中兴通讯股份有限公司 | A synchronization method in orthogonal frequency division multiplexing system |
| CN101304256A (en) * | 2008-07-08 | 2008-11-12 | 北京天碁科技有限公司 | Method for eliminating direct current bias |
| CN101431498A (en) * | 2008-12-02 | 2009-05-13 | 清华大学 | Demodulation method and device for flexible sub-carrier modulation system |
| CN101778066A (en) * | 2009-12-31 | 2010-07-14 | 北京交通大学 | Physical layer preamble optimization-based synchronization method and system |
| CN102480452A (en) * | 2010-11-26 | 2012-05-30 | 中国科学院微电子研究所 | Carrier frequency synchronization circuit and method of OFDM system |
| CN102123116A (en) * | 2011-03-11 | 2011-07-13 | 京信通信***（中国）有限公司 | Direct-current offset calibration method and device |
| CN102255865A (en) * | 2011-09-02 | 2011-11-23 | 东南大学 | Frame head sequence based channel estimating method for orthogonal frequency division multiplexing ultra-wideband system |
| CN102412866A (en) * | 2011-11-23 | 2012-04-11 | 北京泰美世纪科技有限公司 | Joint estimation method and system for carrier frequency offset, frame head phase position and fine symbol timing |
| CN102497339A (en) * | 2011-12-12 | 2012-06-13 | 安徽省菲特科技股份有限公司 | Frequency deviation estimating method in QAM (quadrature amplitude modulation) communication system |
| CN102546514A (en) * | 2012-01-21 | 2012-07-04 | 北京邮电大学 | Frequency synchronization method and equipment for OFDM system |
| CN103248593A (en) * | 2012-02-09 | 2013-08-14 | 泰凌微电子（上海）有限公司 | Method and system for frequency offset estimation and elimination |
| CN102801673A (en) * | 2012-08-16 | 2012-11-28 | 苏州英菲泰尔电子科技有限公司 | Quick carrier synchronizing method for FSK signal coherent demodulation |
| CN103227764A (en) * | 2012-12-14 | 2013-07-31 | 西安英菲泰尔电子科技有限公司 | Rapid carrier synchronization method for carrying out coherent demodulation on burst transmission signal |
| CN103152308A (en) * | 2013-03-04 | 2013-06-12 | 北京科技大学 | Joint estimation method of frequency offset, DC (Direct Current) and imbalance of orthogonal frequency division multiplexing system |
| CN103327516A (en) * | 2013-05-21 | 2013-09-25 | 上海晨思电子科技有限公司 | Method and device for detecting main synchronizing signals |
| CN103516659A (en) * | 2013-10-23 | 2014-01-15 | 北京科技大学 | Method for estimating carrier frequency offset of OFDM system with time varying direct current offset |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040240A (en) * | 2017-03-21 | 2017-08-11 | 四川九洲电器集团有限责任公司 | A kind of digital signal processing method and equipment |
| CN107040240B (en) * | 2017-03-21 | 2020-11-03 | 四川九洲电器集团有限责任公司 | Digital signal processing method and device |
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|---|---|
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