CN101047465A - Signal process method, checking device and signal receiving machine - Google Patents
Signal process method, checking device and signal receiving machine Download PDFInfo
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- CN101047465A CN101047465A CN 200610065929 CN200610065929A CN101047465A CN 101047465 A CN101047465 A CN 101047465A CN 200610065929 CN200610065929 CN 200610065929 CN 200610065929 A CN200610065929 A CN 200610065929A CN 101047465 A CN101047465 A CN 101047465A
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Abstract
A method for processing signal includes receiving and verifying signal, confirming that signal is received correctly if verification is passed, verifying signal again after portion with high correct reception probability is removed off as interference by interference eliminating means if verification is failure, confirming that signal is received correctly if verification is passed and only confirming that signal is fail-received till the last verification is failure. The device used for realizing said method is disclosed.
Description
Technical field
The present invention relates to wireless communication technology, signal processing method, calibration equipment and transceiver in particularly a kind of multi-input multi-output system.
Background technology
MIMO (Multi-Input Multi-Output, multiple-input and multiple-output) application of technology in wireless communication system more and more comes into one's own, no matter be that MIMO has its irreplaceable superiority from angle that increases power system capacity or the angle of improving systematic function.MIMO mainly is divided into two big classes, one class be with the maximization diversity gain be the space diversity reception to communicate of purpose, another kind of then is to be the space division multiplexing technology of purpose with maximum data speed, wherein, can be divided into following three kinds of structures based on the space division multiplexing technological model ground of MIMO:
1, single codeword SCW (Single Code Word) pattern
As shown in Figure 1, data flow to be sent at first through chnnel coding, interweave and operation such as planisphere mapping, launch (number that M is transmitting antenna) through different antennas respectively for the data flow of M road phase same rate along separate routes then.Difference according to the multi-access mode that system adopted, channel code or channel resources such as frequency or time that the data occupancy of this M transmitting antenna is identical, for example, to code division multiple access (CDMA) system, M transmitting antenna uses identical channel code, to OFDM (OFDMA) system, M transmitting antenna uses one group of identical subcarrier etc., among Fig. 1 channelizing handle promptly according to multi-access mode that system adopted with the signal of respective antenna carry out spread spectrum (to cdma system), subcarrier mapping (to the OFDMA system) waits processing accordingly.
2, many code words MCW (Multiple Code Word) pattern
As shown in Figure 2, for MCW, data flow to be sent is the data flow of M road and M the corresponding different rates of transmitting antenna at first along separate routes, then respectively through chnnel coding independently, interweave and operation such as planisphere mapping, go out by corresponding transmission antennas transmit respectively at last.Similarly, difference according to the multi-access mode that system adopted, channel code or channel resources such as frequency or time that the data occupancy of this M transmitting antenna is identical, for example, to cdma system, M transmitting antenna uses identical channel code, and to the OFDMA system, M transmitting antenna uses one group of identical subcarrier etc.
SIC (Successive Interference Cancellation, continuous interference eliminated) be a kind of common technology among the MCW, in the MCW communication plan, there is multichannel to transmit, the encoding scheme of different coding rate is all adopted on each road, receiving terminal is according to acknowledge(ment) signal, decoding earlier, riches all the way penetrates signal, after the decoding, judge according to check digit whether the decoding of this road signal is correct, if correct, then use decoded results, eliminate the influence that transmits that this road has been correctly decoded from received signal, according to the described received signal of having eliminated after influencing, another road of decoding transmits again; Like this iteration carry out above-mentioned step, transmit up to all multichannels of decoding.If a certain road transmits not by correct decoding, then the influence that this road transmits can't be from received signal, eliminated, thereby following step can't be carried out, need to retransmit.
In MIMO, an important aspect is how to carry out HARQ to retransmit, and especially for SCW, because the amount that retransmits is relatively big, the opportunity of making the re-transmission decision is just even more important.In existing receiver, because SCW is a Unified coding, so utilize simple linear receiver just can solve modulation symbol, if the packet after the demodulation sends ACK information by verification (the general using CRC check detects, and promptly cyclic redundancy detects), show correct reception, in case can not then send nack message by verification, need retransmit.In MCW, also similarly handle, promptly, just directly send NACK as long as CRC check can not be passed through.
In the prior art, receiving terminal just directly sends NACK to transmitting terminal and requires re-transmission when decoding error, and retransmitting to increase the decoding accuracy, but obviously can increase delay and reduce throughput.In fact, wrong considerably less on may decoded packet, possible can being correctly decoded after the reliability higher data being utilized interference elimination method eliminate, if this occurs, directly retransmit the waste that is actually channel resource in the prior art, influence throughput.
Summary of the invention
The invention provides signal processing method, calibration equipment and transceiver in a kind of multi-input multi-output system, to solve the problem that how to reduce number of retransmissions in the existing multi-input multi-output system.
The technology of the present invention design is achieved through the following technical solutions:
Signal processing method in a kind of multi-input multi-output system is characterized in that, comprises the steps:
A, receiving terminal receive and checking signal, if verification by confirm that this signal is correctly received; The verification failure then continues step B;
B, receiving terminal carry out verification after progressively utilizing the method for the interference eliminated part that the correct probability of acceptance is higher to fall as interference eliminated again, if verification by confirm that this signal is correctly received; To the last after interference eliminated still the verification failure confirm that again this signal takes defeat.
The specific implementation method of wherein said step B has following three kinds:
One, receiving terminal is that unit determines the correct probability of acceptance with the transmitting antenna, again if the described signal of verification after utilizing the method transmitting antenna that the correct probability of acceptance is the highest of interference eliminated to fall as interference eliminated earlier is verification succeeds then confirm that this signal is correctly received; Otherwise the method for progressively utilizing interference eliminated will remain in the antenna the correct the highest transmitting antenna of the probability of acceptance fall as interference eliminated after the described signal of verification again, if verification succeeds then confirm that this signal is correctly received, still verification failure after to the last once the correct probability of acceptance time low transmitting antenna being fallen as interference eliminated confirms that again this signal takes defeat.
Two, receiving terminal is that unit confirms the correct probability of acceptance with the symbol, and in each symbol period, if the described signal of verification again after earlier will the wherein correct the highest symbol of the probability of acceptance falling as interference eliminated is verification succeeds then confirm that this signal is correctly received; Otherwise progressively with the described signal of verification again after the correct the highest symbol of the probability of acceptance falls as the interference eliminated in this symbol period in the residue symbol in each symbol period, if verification succeeds then confirm that this signal is correctly received, still verification failure after to the last once the correct probability of acceptance time low symbol being fallen as interference eliminated confirms that again this signal takes defeat.
Three, receiving terminal is set the probability threshold value that symbol is correctly received, again if the described signal of verification after earlier the correct probability of acceptance in all symbols being fallen as interference eliminated more than or equal to the symbol of this probability threshold value is verification succeeds then confirm that this signal is correctly received; Otherwise progressively in the residual signal that detects again, the described signal of verification again after the correct probability of acceptance wherein fallen as interference eliminated more than or equal to the symbol of this probability threshold value, if verification succeeds then confirm that this signal is correctly received, when the correct probability of acceptance of each symbol is all less than this probability threshold value in the signal after to the last detecting again, confirm that again this signal takes defeat;
Can also set verification number of times threshold value, judge that whether the verification number of times equals this verification number of times threshold value, takes defeat if then confirm this signal after the verification again each time; Otherwise proceed verification next time;
All right preset proportion threshold value, before carrying out interference eliminated each time, judge earlier carry out this interference eliminated more than or equal to the ratio of the symbol of described probability threshold value whether more than or equal to described ratio thresholding, if carry out interference eliminated again, otherwise directly confirmation signal takes defeat;
Wherein, probability threshold value, verification number of times threshold value or ratio threshold value are determined according to emulated data.
The described correct probability of acceptance: determine that according to corresponding signal to noise ratio the high more then correct probability of acceptance of signal to noise ratio is high more, the low more then correct probability of acceptance of signal to noise ratio is low more; Determine according to the absolute value of corresponding log-likelihood ratio LLR that perhaps the high more then correct probability of acceptance of the absolute value of LLR is high more, the low more then correct probability of acceptance of the absolute value of LLR is low more.
Also comprise in the described method: receiving terminal sends confirmation to transmitting terminal after confirming that described signal is by correct the reception; After receiving terminal confirms that described signal takes defeat, send retransmission information, after transmitting terminal is received this retransmission information, resend described signal to transmitting terminal.
The method of described verification is meant carries out the cyclic redundancy CRC check to each packet in the described signal.
Signal checking device in a kind of multi-input multi-output system comprises: verification unit and the secondary verification unit that is connected;
A described verification unit is carried out verification first to the signal that receives, if verification by confirm that this signal is correctly received; Verification failure then triggers the secondary verification unit progressively with the described signal of verification again after the correct higher part of the probability of acceptance is fallen as interference eliminated in the described signal, if verification by confirm that this signal is correctly received; Verification failure to the last confirms that again this signal takes defeat.
Described signal processing apparatus also comprises: correct probability of acceptance determining unit, connect described secondary verification unit, and be used for the correct probability of acceptance of determining section signal respectively.
Transceiver in a kind of multi-input multi-output system comprises the re-transmission control unit; Also comprise: connect the signal checking device of described re-transmission control unit, this signal checking device comprises verification unit and the secondary verification unit that is connected;
A described verification unit is carried out verification first to the signal that receives, if verification by confirm that this signal is correctly received; Verification failure then triggers the secondary verification unit progressively with the described signal of verification again after the correct higher part of the probability of acceptance is fallen as interference eliminated in the described signal, if verification by confirm that this signal is correctly received; Verification failure to the last confirms that again this signal takes defeat;
After a described verification unit and secondary verification unit confirmation signal are correctly received, trigger the re-transmission control unit and send confirmation; After confirmation signal takes defeat, trigger retransmitting control unit transmission retransmission information.
Described signal processing apparatus also comprises: correct probability of acceptance determining unit, connect described secondary verification unit, and be used for the correct probability of acceptance of determining section signal respectively.
Beneficial effect of the present invention is as follows:
The present invention effectively utilizes in the mimo system reliability value that receives data on each antenna to carry out cyclic check, avoids some unnecessary HARQ to retransmit and takes place, and has reduced the time delay of system and has increased the throughput of system.The present invention is suitable equally for SCW pattern and MCW pattern, minimizing number of retransmissions that can be to a certain degree.
Description of drawings
Fig. 1 is a single codeword pattern MIMO structure;
Many patterns of code words of Fig. 2 MIMO structure;
Fig. 3 is embodiment one a described method flow diagram;
Fig. 4 is embodiment two described method flow diagrams;
Fig. 5 is embodiment three described method flow diagrams;
Fig. 6 is embodiment four described apparatus structure schematic diagrames;
Fig. 7 is embodiment five described transceiver architecture schematic diagrames.
Embodiment
In the prior art, when packet error is decoded, even lot of data may correctly detect, can all correctly detect all data by further processing, but need directly carry out the HARQ re-transmission, thus causing the waste of re-transmission, why prior art is done like this, be how many decoded in error that is difficult to the judgment data bag has actually, therefore made a kind of method of insurance.
When the present invention can not pass through when CRC check, wrap in the correct probability of acceptance of process demodulation (or decoding) soft validation of information part signal afterwards by calculated data, progressively eliminate in the described signal after the interference that the higher part of the correct probability of acceptance produces the described signal of verification more then, if verification by confirm that this signal is correctly received; The verification failure confirms that then this signal takes defeat.The correct probability of acceptance has reflected the reliability of signal, can be signal to noise ratio SINR by property, and SINR is high more, and then reliability is high more; Soft information that also can is-symbol (or bit), as absolute value (log-likelihood ratio, log-likelihood ratio) of LLR etc., the high more then reliability of the absolute value of LLR is high more.
Specifically, in a mimo system, at a time, receiving terminal receives that multichannel at first carries out normal demodulating and decoding operation after transmitting, detect such as MMSE (minimum mean square error, least mean-square error), if can pass through CRC check, then directly send ACK, otherwise carry out following operation according to a kind of in the following scheme:
Embodiment one, utilize the highest one of mean reliability in the transmitting antenna to carry out interference eliminated
Average reliability size corresponding relation according to each transmitting antenna, suppose that all symbols all correctly detect on the highest antenna of mean reliability, method according to SIC eliminates as disturbing, symbol to remainder detects, again two parts information is merged and carry out CRC check, if by would directly send ACK, just no longer need to have retransmitted, if do not pass through, then will remain the symbol that receives on the antenna that reliability is the highest in the antenna again and eliminate as disturbing, so maximum duplication checks M-1 time, M is a number of antennas, if still can not pass through CRC check, send NACK again.
As shown in Figure 3, comprise the steps:
S101, receiving terminal detect the signal that receives;
S102, all signals are carried out CRC check, if verification by directly carry out step S111 and send ACK to transmitting terminal; Otherwise continue;
S103, the mean reliability value of each transmitting antenna correspondence is sorted from high to low, and respective coding i=1 is set, 2 ... M, M are number of antennas;
S104, put i=1;
S105, the signal on i the transmitting antenna is carried out interference eliminated as interference;
Signal on S106, the antenna of detection residue again;
S107, the signal after will detecting and the signal that carries out interference eliminated before reconfigure;
S108, the signal after reconfiguring is carried out CRC check, if verification by directly carry out step S111 and send ACK to transmitting terminal; Otherwise continue;
S109, put i=i+1;
S110, judge whether i equals M, promptly whether carried out M-1 time interference eliminated, if then execution in step S112 sends NACK to transmitting terminal; Otherwise return step S105 and continue verification;
S111, after sending ACK, finishes transmitting terminal;
S112, after sending NACK, finishes transmitting terminal.
In the present embodiment, the mean reliability value of each transmitting antenna correspondence can be the average SINR of each antenna, and SINR is high more, and then reliability is high more; Also can be the absolute value of the average LLR of all symbols (or bit) of receiving of each antenna, the high more then reliability of the absolute value of LLR be high more.
Present embodiment can be summarized as follows: receiving terminal is that unit determines the correct probability of acceptance with the transmitting antenna, again if the described signal of verification after utilizing the method transmitting antenna that the correct probability of acceptance is the highest of interference eliminated to fall as interference eliminated earlier is verification succeeds then confirm that this signal is correctly received; Otherwise the method for progressively utilizing interference eliminated will remain in the antenna the correct the highest transmitting antenna of the probability of acceptance fall as interference eliminated after the described signal of verification again, if verification succeeds then confirm that this signal is correctly received, still verification failure after to the last once the correct probability of acceptance time low transmitting antenna being fallen as interference eliminated confirms that again this signal takes defeat.
Embodiment two, utilize the symbol that reliability is the highest in each symbol period to carry out interference eliminated
Similar with embodiment one, also be (such as SINR reliability value, the absolute values of LLR etc.) a highest symbol is made interference eliminated according to the method for SIC, but different is, relatively in each symbol period, carrying out of reliability, and embodiment one is the mean reliability comparison of each antenna in the whole packet.Identical with embodiment one, duplication check is M-1 time at most, and M is a number of antennas, if still can not pass through CRC check, sends NACK again.
As shown in Figure 4, comprise the steps:
S201, receiving terminal detect the signal that receives;
S202, all signals are carried out CRC check, if verification by directly carry out step S211 and send ACK to transmitting terminal; Otherwise continue;
S203, with the reliability value of each symbol correspondence in each symbol period on each transmitting antenna from height to low ordering, and respective coding i=1 is set, 2 ..., M, M are number of antennas;
S204, put i=1;
S205, i symbol in each symbol period eliminated as interference;
S206 detects remaining signal again;
S207, signal after detecting again and the signal that balances out are before reconfigured;
S208, the signal after reconfiguring is carried out CRC check, if verification by directly carry out step S211 and send ACK to transmitting terminal; Otherwise continue;
S209, put i=i+1;
S110, judge whether i equals M, promptly whether carried out M-1 time interference eliminated, if then execution in step S212 sends NACK to transmitting terminal; Otherwise return step S205 and continue verification;
S211, after sending ACK, finishes transmitting terminal;
S212, after sending NACK, finishes transmitting terminal.
In the present embodiment, the reliability value of each symbol can be the SINR of this symbol correspondence, and SINR is high more, and then reliability is high more; Also can be the absolute value of the LLR of this symbol correspondence, the high more then reliability of the absolute value of LLR be high more.
Present embodiment can be summarized as follows: receiving terminal is that unit confirms the correct probability of acceptance with the symbol, in each symbol period, again if the described signal of verification after earlier will the wherein correct the highest symbol of the probability of acceptance falling as interference eliminated is verification succeeds then confirm that this signal is correctly received; Otherwise progressively with the described signal of verification again after the correct the highest symbol of the probability of acceptance falls as the interference eliminated in this symbol period in the residue symbol in each symbol period, if verification succeeds then confirm that this signal is correctly received, still verification failure after to the last once the correct probability of acceptance time low symbol being fallen as interference eliminated confirms that again this signal takes defeat.
Embodiment three
Serves as that the investigation object is different with above-mentioned two kinds of embodiment with the signal on each antenna, and present embodiment serves as to investigate object with the whole signals on all antennas.Under present embodiment, at first ask for the soft information reliability value of all symbols (perhaps bit), absolute value such as LLR, choose a collection of symbol Y1 of all soft values of information according to predefined correct probability of acceptance thresholding A more than or equal to value A, suppose that these symbols correctly detect, can fall according to the mode of SIC them as interference eliminated so, signal Y2 to remainder detects again then, again two parts of signals is combined and carried out the CRC detection, if by would directly send ACK, just no longer need to have retransmitted, if do not pass through, so eliminated among the symbol Y2 that Y1 disturbs and chosen the symbol of the soft value of information again, so repeated, carried out Q-1 time duplication check altogether at most more than or equal to A.
For reducing number of repetition, can set verification number of times threshold value Q, if when the verification number of times reaches threshold value Q also not by verification, then no longer continue duplication check, directly send NACK;
Further in order to reduce the duplication check number of times, can also establish a ratio thresholding B in addition again, in the data that needs detect again, if soft information reliability value is less than B more than or equal to symbol (or bit) proportion of A, then the probability that passes through of verification is very little, so just direct transmission NACK.
Here, correct probability of acceptance thresholding A is a class value corresponding with each MCS, and A, B or Q can obtain by emulation in advance.
As shown in Figure 5, comprise the steps:
S301, receiving terminal detect the signal that receives;
S302, all signals are carried out CRC check, if verification by directly carry out step S314 and send ACK to transmitting terminal; Otherwise continue;
S303, obtain the reliability value of all symbol correspondences;
S304, choose wherein reliability value greater than all symbols of thresholding A;
S305, put and detect number of times k=1;
S306, judge reliability value greater than the number of symbols of thresholding A whether less than B, send NACK if then directly carry out step S315 to transmitting terminal; Otherwise continue;
S307, reliability value is eliminated as interference greater than the symbol of thresholding A;
S308 detects remaining signal again;
S309, signal after detecting again and the signal that balances out are before reconfigured;
S310, the signal after reconfiguring is carried out CRC check, if verification by directly carry out step S314 and send ACK to transmitting terminal; Otherwise continue;
S311, put k=k+1;
S312, judge whether verification number of times k equals thresholding Q, if then execution in step S315 sends NACK to transmitting terminal; Otherwise continue step S313;
S313, return step S306 after from the residue symbol that detects again, choosing reliability value all symbols again greater than thresholding A;
S314, after sending ACK, finishes transmitting terminal;
S315, after sending NACK, finishes transmitting terminal.
In the present embodiment, the reliability value of each symbol can be the SINR of this symbol correspondence, and SINR is high more, and then reliability is high more; Also can be the absolute value of the LLR of this symbol correspondence, the high more then reliability of the absolute value of LLR be high more.Threshold value A and the B of corresponding different modulating coded system MCS can obtain by emulation.
Present embodiment can be summarized as follows: receiving terminal is set the probability threshold value that symbol is correctly received, again if the described signal of verification after earlier the correct probability of acceptance in all symbols being fallen as interference eliminated more than or equal to the symbol of this probability threshold value is verification succeeds then confirm that this signal is correctly received; Otherwise progressively in the residual signal that detects again, the described signal of verification again after the correct probability of acceptance wherein fallen as interference eliminated more than or equal to the symbol of this probability threshold value, if verification succeeds then confirm that this signal is correctly received, when the correct probability of acceptance of each symbol is all less than this probability threshold value in the signal after to the last detecting again, confirm that again this signal takes defeat;
For reducing the duplication check number of times, set verification number of times threshold value, judging that whether the verification number of times equals this verification number of times threshold value, takes defeat if then confirm this signal after the verification again each time; Otherwise proceed verification next time;
Further for reducing the duplication check number of times, the preset proportion threshold value, before carrying out interference eliminated each time, judge earlier carry out this interference eliminated more than or equal to the ratio of the symbol of described probability threshold value whether more than or equal to described ratio thresholding, if carry out interference eliminated again, otherwise directly confirmation signal takes defeat.
In above-mentioned three kinds of methods, obviously method one control is the simplest, but the gain that SIC brings is also minimum.Method two has been considered channel in the situation of change of distinct symbols in the cycle, so ratio of gains method one obviously wants big.Three of methods have been taken into account the situation of change of channel and the characteristics of SIC algorithm itself, avoided the generation of following situation: if channel situation is relatively poor in a certain symbol period, information on all antennas is not very reliable, so the symbol on one of them antenna is eliminated, thereby be easy to bring error into effect that detection next time influences SIC.Therefore the gain maximum brought of method three, but obviously control is got up also the most complicated.
Embodiment four, signal checking device
As shown in Figure 6, the signal checking device in a kind of multi-input multi-output system comprises: verification unit and the secondary verification unit that is connected;
A described verification unit is carried out verification first to the signal that receives, if verification by confirm that this signal is correctly received; Verification failure then triggers the secondary verification unit progressively with the described signal of verification again after the correct higher part of the probability of acceptance is fallen as interference eliminated in the described signal, if verification by confirm that this signal is correctly received; Verification failure to the last confirms that again this signal takes defeat.
Described signal processing apparatus also comprises: correct probability of acceptance determining unit, connect described secondary verification unit, and be used for the correct probability of acceptance of determining section signal respectively.
Embodiment five
As shown in Figure 7, the transceiver in a kind of multi-input multi-output system comprises the re-transmission control unit; It is characterized in that described transceiver also comprises: connect the signal checking device of described re-transmission control unit, this signal checking device comprises verification unit and the secondary verification unit that is connected;
A described verification unit is carried out verification first to the signal that receives, if verification by confirm that this signal is correctly received; Verification failure then triggers the secondary verification unit progressively with the described signal of verification again after the correct higher part of the probability of acceptance is fallen as interference eliminated in the described signal, if verification by confirm that this signal is correctly received; Verification failure to the last confirms that again this signal takes defeat;
After a described verification unit and secondary verification unit confirmation signal are correctly received, trigger the re-transmission control unit and send confirmation; After confirmation signal takes defeat, trigger retransmitting control unit transmission retransmission information.
Described signal processing apparatus also comprises: correct probability of acceptance determining unit, connect described secondary verification unit, and be used for the correct probability of acceptance of determining section signal respectively.
In a word, the present invention effectively utilizes in the mimo system reliability value that receives data on each antenna to carry out cyclic check, avoids some unnecessary HARQ to retransmit and takes place, and has reduced the time delay of system and has increased the throughput of system.The present invention is suitable equally for SCW pattern and MCW pattern, to minimizing number of retransmissions that can be to a certain degree.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1, the signal processing method in a kind of multi-input multi-output system is characterized in that, comprises the steps:
A, receiving terminal receive and checking signal, if verification by confirm that this signal is correctly received; The verification failure then continues step B;
B, receiving terminal carry out verification after progressively utilizing the method for the interference eliminated part that the correct probability of acceptance is higher to fall as interference eliminated again, if verification by confirm that this signal is correctly received; To the last after interference eliminated still the verification failure confirm that again this signal takes defeat.
2, the method for claim 1, it is characterized in that, among the described step B, receiving terminal is that unit determines the correct probability of acceptance with the transmitting antenna, again if the described signal of verification after utilizing the method transmitting antenna that the correct probability of acceptance is the highest of interference eliminated to fall as interference eliminated earlier is verification succeeds then confirm that this signal is correctly received; Otherwise the method for progressively utilizing interference eliminated will remain in the antenna the correct the highest transmitting antenna of the probability of acceptance fall as interference eliminated after the described signal of verification again, if verification succeeds then confirm that this signal is correctly received, still verification failure after to the last once the correct probability of acceptance time low transmitting antenna being fallen as interference eliminated confirms that again this signal takes defeat.
3, the method for claim 1, it is characterized in that, among the described step B, receiving terminal is that unit confirms the correct probability of acceptance with the symbol, in each symbol period, again if the described signal of verification after earlier will the wherein correct the highest symbol of the probability of acceptance falling as interference eliminated is verification succeeds then confirm that this signal is correctly received; Otherwise progressively with the described signal of verification again after the correct the highest symbol of the probability of acceptance falls as the interference eliminated in this symbol period in the residue symbol in each symbol period, if verification succeeds then confirm that this signal is correctly received, still verification failure after to the last once the correct probability of acceptance time low symbol being fallen as interference eliminated confirms that again this signal takes defeat.
4, the method for claim 1, it is characterized in that, among the described step B, receiving terminal is set the probability threshold value that symbol is correctly received, again if the described signal of verification after earlier the correct probability of acceptance in all symbols being fallen as interference eliminated more than or equal to the symbol of this probability threshold value is verification succeeds then confirm that this signal is correctly received; Otherwise progressively in the residual signal that detects again, the described signal of verification again after the correct probability of acceptance wherein fallen as interference eliminated more than or equal to the symbol of this probability threshold value, if verification succeeds then confirm that this signal is correctly received, when the correct probability of acceptance of each symbol is all less than this probability threshold value in the signal after to the last detecting again, confirm that again this signal takes defeat.
5, method as claimed in claim 4 is characterized in that, described method also comprises: set verification number of times threshold value, judging that whether the verification number of times equals this verification number of times threshold value, takes defeat if then confirm this signal after the verification again each time; Otherwise proceed verification next time.
6, as claim 4 or 5 described methods, it is characterized in that, described method also comprises: the preset proportion threshold value, before carrying out interference eliminated each time, judge earlier carry out this interference eliminated more than or equal to the ratio of the symbol of described probability threshold value whether more than or equal to described ratio thresholding, if carry out interference eliminated again, otherwise directly confirmation signal takes defeat.
7, method as claimed in claim 6 is characterized in that, described probability threshold value, verification number of times threshold value or ratio threshold value are determined according to emulated data.
8, as one of any described method of claim 1-6, it is characterized in that the described correct probability of acceptance:
Determine that according to corresponding signal to noise ratio the high more then correct probability of acceptance of signal to noise ratio is high more, the low more then correct probability of acceptance of signal to noise ratio is low more; Perhaps
Absolute value according to corresponding log-likelihood ratio LLR determines that the high more then correct probability of acceptance of the absolute value of LLR is high more, and the low more then correct probability of acceptance of the absolute value of LLR is low more.
9, as one of any described method of claim 1-6, it is characterized in that, also comprise in the described method:
Receiving terminal sends confirmation to transmitting terminal after confirming that described signal is by correct the reception;
After receiving terminal confirms that described signal takes defeat, send retransmission information, after transmitting terminal is received this retransmission information, resend described signal to transmitting terminal.
10, as one of any described method of claim 1-6, it is characterized in that the method for described verification is meant carries out the cyclic redundancy CRC check to each packet in the described signal.
11, the signal checking device in a kind of multi-input multi-output system is characterized in that comprising: verification unit and the secondary verification unit that is connected;
A described verification unit is carried out verification first to the signal that receives, if verification by confirm that this signal is correctly received; Verification failure then triggers the secondary verification unit progressively with the described signal of verification again after the correct higher part of the probability of acceptance is fallen as interference eliminated in the described signal, if verification by confirm that this signal is correctly received; Verification failure to the last confirms that again this signal takes defeat.
12, signal processing apparatus as claimed in claim 11 is characterized in that, described signal processing apparatus also comprises: correct probability of acceptance determining unit, connect described secondary verification unit, and be used for the correct probability of acceptance of determining section signal respectively.
13, the transceiver in a kind of multi-input multi-output system comprises the re-transmission control unit; It is characterized in that described transceiver also comprises: connect the signal checking device of described re-transmission control unit, this signal checking device comprises verification unit and the secondary verification unit that is connected;
A described verification unit is carried out verification first to the signal that receives, if verification by confirm that this signal is correctly received; Verification failure then triggers the secondary verification unit progressively with the described signal of verification again after the correct higher part of the probability of acceptance is fallen as interference eliminated in the described signal, if verification by confirm that this signal is correctly received; Verification failure to the last confirms that again this signal takes defeat;
After a described verification unit and secondary verification unit confirmation signal are correctly received, trigger the re-transmission control unit and send confirmation; After confirmation signal takes defeat, trigger retransmitting control unit transmission retransmission information.
14, transceiver as claimed in claim 13 is characterized in that, described signal processing apparatus also comprises: correct probability of acceptance determining unit, connect described secondary verification unit, and be used for the correct probability of acceptance of determining section signal respectively.
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| CN (1) | CN101047465A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905065A (en) * | 2012-12-28 | 2014-07-02 | 联芯科技有限公司 | Convolutional code decoding method and device |
| CN109407523A (en) * | 2017-08-16 | 2019-03-01 | 佛山市顺德区美的电热电器制造有限公司 | The control method of heating platform component and the control system of heating platform component |
| CN113219941A (en) * | 2021-04-22 | 2021-08-06 | 湖南联塑科技实业有限公司 | Signal linking and confirming method between industrial equipment |
-
2006
- 2006-03-27 CN CN 200610065929 patent/CN101047465A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905065A (en) * | 2012-12-28 | 2014-07-02 | 联芯科技有限公司 | Convolutional code decoding method and device |
| CN103905065B (en) * | 2012-12-28 | 2017-06-13 | 联芯科技有限公司 | A kind of coding method of convolution code and device |
| CN109407523A (en) * | 2017-08-16 | 2019-03-01 | 佛山市顺德区美的电热电器制造有限公司 | The control method of heating platform component and the control system of heating platform component |
| CN113219941A (en) * | 2021-04-22 | 2021-08-06 | 湖南联塑科技实业有限公司 | Signal linking and confirming method between industrial equipment |
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