CN1992577B - Method and apparatus for obtaining the number of decoding error block from check-free data block - Google Patents
Method and apparatus for obtaining the number of decoding error block from check-free data block Download PDFInfo
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Abstract
The invention discloses a method to access no-checking data block decoding error block number, and according to the Hamming distance and the Euclidean distance smallest method used in the channel codec, through simulation results to set decoding confidence interval, and using the maximum likelihood method, to estimate the decoding error block rate of the data block received in the measuring cycle, therefore ultimately, obtaining a more accurate estimate of the received error frame number, and realizing the error block rate measuring function of the no-frame checking coding data block. The invention also discloses a device to access no-checking data block decoding error block number, including the configuration module, the decoding module, the encoding module, the mapping modules, the likelihood value calculation unit, the comparison module, and the error block estimated unit. The invention can simple and accurately access no-checking data block decoding error block number.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of method and device that obtains the number of decoding error block from check-free data block.
Background technology
In existing communication system, in order to carry out the distribution and the adjustment of resource better, resource management module need be measured and reported in the communication process some about the performance parameter of communication quality, require PL (physical layer) entity to carry out the measurement of some idle port communication quality as the RRC in the 3G communication system (Radio Resource control) entity, comprising measuring this important parameter of Block Error Rate that produces in the communication process.System can specify a measurement period usually, carries out the statistics of correlated performance in this cycle.In order to reach the purpose of measuring Block Error Rate, in the coded data block of communication system, usually all carry the coding that is used for block check (commonly used as cyclic redundancy check (CRC)), the data block that is used for after receiver side is to decoding is carried out verification, thereby obtains mistake piece number and Block Error Rate.
As shown in Figure 1, after system receives data, carry out demodulation, decode procedure is the data behind the receiving demodulation at first, decipher, and the verification mode by appointment of the data after the decoding is carried out verification, it is correct that verification represents that correctly this data block receives, on the contrary the data block error that receives.By data block number that receives in the designated period and the error block number that receives during this period, just can be easy to calculate Block Error Rate.
Yet in communication system, also there is a kind of coded data block, wherein do not carry out the coding of block check, as TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system for supporting the coded system of HS-SICH (high-speed shared information channel) channel that HSDPA (high speed downlink packet access) increases.For this coded system of not adding the frame check bit, then can't know mistake piece number and Block Error Rate after the decoding by the mode of data block being carried out verification.
In order to solve the measurement of the Block Error Rate under this coded system situation of not adding the frame check bit, can carry out the statistics of the error rate and Block Error Rate theoretically according to the performance of coding, thereby obtain the system emulation performance curve under the corresponding coded system, find corresponding Block Error Rate/error rate according to the signal to noise ratio that receives from Block Error Rate/error rate-signal to noise ratio curve then.But in actual communication systems, channel circumstance is constantly changing, system emulation can only be carried out at typical channel circumstance, be difficult to know from receiving terminal which kind of current channel circumstance should belong to simultaneously, so the statistics of carrying out the Block Error Rate and the error rate according to the performance of coding can be influenced by different channel circumstances and obtain different respective value theoretically, this mode is difficult to be applied in the real system.
Summary of the invention
The purpose of this invention is to provide a kind of method of obtaining the number of decoding error block from check-free data block, to overcome the shortcoming that accurately to obtain data block decoding Block Error Rate in the prior art by the system emulation test mode, realize statistics simply, exactly, satisfy in the communication system missing the measurement requirement of piece number and Block Error Rate to the number of decoding error block from check-free data block.
The purpose of this invention is to provide a kind of device that obtains the number of decoding error block from check-free data block, realize measurement, for system provides measurement report accurately to the number of decoding error block from check-free data block.
For this reason, the invention provides following technical scheme:
A kind of method of obtaining the number of decoding error block from check-free data block may further comprise the steps:
A, setting decoding confidential interval and measuring period;
B, carry out maximum likelihood relatively, obtain the Block Error Rate λ of the data block that at every turn receives in described measuring period according to the data of the confidential interval of setting after to the demodulation that receives
i
C, calculating described measuring period of interior average Block Error Rate;
D, estimate to obtain mistake piece number in described measuring period according to the frame number of average Block Error Rate in described measuring period and the data block in measuring period, received.
Described step B comprises:
B1, the data block that receives is carried out deinterleaving and multiplexing process, the data sequence R before obtaining deciphering;
B2, data sequence R is deciphered the data result D after obtaining deciphering;
B3, to decoding after data result D encode according to the coded system of data block;
B4, the data sequence after will encoding according to the mapping mode corresponding with the data-modulated mode are mapped as signed data sequence S;
B5, calculating likelihood value A=RS
T, S
TTransposed sequence for sequence S;
B6, likelihood value A and described confidential interval are compared the Block Error Rate λ of the data block that obtains receiving
i
Between described step B1 and step B2, also comprise step:
When having multiple different coded system in the data block that receives, data sequence R is carried out segmentation according to different coded systems.
Preferably, between described step B1 and step B2, also comprise step:
Choose one or more the different coded data sections after the segmentation.
Between described step B3 and step B4, also comprise step:
Data sequence behind described each segment data block encoding is made up according to the compound mode identical with transmitting terminal.
A kind of method of obtaining the number of decoding error block from check-free data block may further comprise the steps:
A, setting decoding confidential interval and measuring period;
B, carry out maximum likelihood relatively, obtain the likelihood value sequences A ' of the data block correspondence that receives in described measuring period according to the data of the confidential interval of setting after to the demodulation that receives;
C, calculating described measuring period of interior average likelihood value
D, the average likelihood value that will obtain
Compare with the data in the confidential interval, obtain the Block Error Rate in measuring period;
E, estimate to obtain mistake piece number in described measuring period according to the frame number of Block Error Rate in described measuring period and the data block in measuring period, received.
Described step b comprises:
B1, the data block that receives is carried out deinterleaving and multiplexing process, the data sequence R before obtaining deciphering;
B2, data sequence R is deciphered the data result D after obtaining deciphering;
B3, to decoding after data result D encode according to the coded system of data block;
B4, the data sequence after will encoding according to the mapping mode corresponding with the data-modulated mode are mapped as signed data sequence S;
B5, calculating likelihood value A=RS
T, S
TTransposed sequence for sequence S;
B6, the data block repeating step b1 to b5 to receive in described measuring period at every turn obtain the likelihood value sequences A ' of the data block correspondence that receives in described measuring period.
Between described step b1 and step b2, also comprise step:
When having multiple different coded system in the data block that receives, data sequence R is carried out segmentation according to different coded systems.
Preferably, between described step b1 and step b2, also comprise step:
Choose one or more the different coded data sections after the segmentation.
Between described step b3 and step b4, also comprise step:
Data sequence behind described each segment data block encoding is made up according to the compound mode identical with transmitting terminal.
A kind of device that obtains the number of decoding error block from check-free data block comprises:
The unit is set, is used for setting decoding confidential interval and measuring period;
The quantized data extraction unit, being used to extract needs the data sequence R that deciphers after demodulation quantizes;
Decoding unit is used for the data sequence R that extracts is deciphered the data result D after obtaining deciphering;
Coding unit is used for the data result D after the decoding is encoded according to the coded system of data block;
Map unit, the data sequence C after being used for will encoding according to the mapping mode corresponding with the data-modulated mode is mapped as signed data sequence S;
The likelihood value computing unit is used for calculating likelihood value according to data sequence R and data sequence S;
Comparing unit is used for the likelihood value of likelihood value computing unit output and the decoding confidential interval of setting are compared, and obtains to receive the Block Error Rate of data block;
The mistake piece is counted estimation unit, is used for estimating to obtain mistake piece number in described measuring period according to the frame number of described Block Error Rate and the data block received in measuring period.
Described device also comprises:
Split cells is used for the data sequence R that extracts is carried out segmentation according to the different coding mode of data block;
Assembled unit is used for the data sequence behind each segment data block encoding of described map unit output is made up according to the compound mode identical with transmitting terminal.
Described device also comprises:
Choose the unit, be used for choosing the data segment that needs are measured from each segment data of described split cells output.
By above technical scheme provided by the invention as can be seen, the present invention according to the Ou Ji Reed between channel coding and decoding result and the data that receive apart from should minimum characteristics, set the decoding confidential interval, method by maximum likelihood, come the decoding Block Error Rate is estimated, estimate more accurately thereby finally obtain receiving one of erroneous frame number, realize Block Error Rate measurement function no frame check coded data block.The present invention realizes simply, can adjust the setting of decoding confidential interval at the different quality requirements that reports, and realizes measuring accurately reporting.
Description of drawings
Fig. 1 is the statistics flow process that the Block Error Rate of data block under the check code situation is arranged;
Fig. 2 is the realization flow figure of the inventive method first embodiment;
Fig. 3 is the Block Error Rate λ that obtains the data block that receives when data block has a kind of coded system
iFlow chart;
Fig. 4 is the Block Error Rate λ that obtains the data block that receives when data block has multiple coded system
iFlow chart;
Fig. 5 is the realization flow figure of the inventive method second embodiment;
Fig. 6 is the theory diagram of first embodiment of apparatus of the present invention;
Fig. 7 is the theory diagram of second embodiment of apparatus of the present invention;
Fig. 8 is the theory diagram of the 3rd embodiment of apparatus of the present invention.
Embodiment
Core of the present invention is according to the Ou Ji Reed between channel coding and decoding result and the data that receive apart from should minimum characteristics, set the decoding confidential interval, by the method for maximum likelihood, come the decoding Block Error Rate is estimated, thereby obtain the number of decoding error block from check-free data block.
The present technique field personnel know, in communication system, the essence of chnnel coding is that the Useful Information transfer of data is reduced, and increases redundant error correction information, increases the reliability of communication.The process of chnnel coding is to insert some code elements in the source data code stream, thereby reaches the purpose of declaring wrong and error correction at receiving terminal.At receiving terminal, the data that receive are carried out demodulation, the data after the demodulation are deciphered, obtain required data.
In a Frame, have one or more different coded data blocks.For each coded data block, need to adopt the decoded mode corresponding that this data block is deciphered, and then obtain required data with coding.If be added with check code in the data block, then know promptly according to this check code whether the data after the decoding correct, and if do not have check code in the data block, then can utilize method provided by the invention, it is estimated.
The present invention is according to the Hamming distance that uses in the channel decoding and the euclidean method apart from minimum, set the decoding confidential interval according to simulation result, method by maximum likelihood, each the data block decoding Block Error Rate that receives is estimated, obtain average Block Error Rate in measuring period according to these estimated results, estimate to obtain mistake piece number in this measuring period according to the frame number of average Block Error Rate and the data block in measuring period, received then, estimate more accurately thereby finally obtain receiving one of erroneous frame number, realize Block Error Rate measurement function no frame check coded data block.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 2, Fig. 2 is the realization flow of the inventive method first embodiment, may further comprise the steps:
Step 201: set decoding confidential interval and measuring period.
Step 202: carry out maximum likelihood relatively, the Block Error Rate λ of the data block that obtains at every turn receiving in measuring period according to the data of the confidential interval of setting after to the demodulation that receives
i
Owing to there is not check code,,, can only obtain a whether correct probability through whether being that correct data block can not be judged accurately after the decoding to the data block that receives.For this situation that can only obtain each transmission block error probability, in a measuring period, carry out the statistics of Block Error Rate.
In measuring period, the data block that at every turn receives is carried out identical processing, obtain corresponding mistake piece sequence λ=[λ
1, λ
2, λ
3..., λ
K], K is the frame number of the data block received in measuring period.
Step 203: calculate the average Block Error Rate in measuring period
Step 204: estimate the mistake piece number in the measurement period
According to different situations, can be to K
ErrRound on carrying out or under round operation, guarantee that the wrong frame number report is an integer.
The front is mentioned, and in a Frame, has one or more different coded data blocks.
When data block has a kind of coded system, can adopt flow process shown in Figure 3, the Block Error Rate λ of the data block that obtains at every turn receiving in measuring period
i:
Step 301: the data block that receives is carried out deinterleaving and multiplexing process, the data sequence R before obtaining deciphering.
Supposing the demodulating data that receives, through after the quantification treatment, is R=[r before decoding
1, r
2, r
3..., r
N], wherein N represents the data length of data block behind the process coding, these data are the data that send over by channel behind the transmitting terminal coding, should be considered as information data+noise data.
Step 302: R deciphers to the data sequence, the data result D after obtaining deciphering, D=[d
1, d
2, d
3... .d
M], wherein M represents the data bit number of data block before coding.
Step 303: the data result D after the decoding is encoded the data sequence C after obtaining encoding, C=[c according to the coded system of data block
1, c
2, c
3..., c
N], wherein N represents the data length of data block behind the process coding.
Step 304: the data sequence C after will encoding according to the mapping mode corresponding with the data-modulated mode is mapped as signed data sequence S, S=[s
1, s
2, s
3..., s
N], wherein N represents the data length of data block behind the process coding.
At different modulation systems, the back result that will encode becomes signed data according to corresponding mapping mode with (0,1) data map.As for QPSK (Quadrature Phase Shift Keying) modulation system, according to 1-＞-1,0-＞1, mode shine upon, obtain sequence S.
Step 305: calculate likelihood value A=RS
T
With sequence R and sequence S
TCarry out dot product, obtain and formula:
Step 306: likelihood value A and confidential interval are compared the Block Error Rate λ of the data block that obtains receiving
i
By following formula as seen, summing up when operation, if the data that receive are data through disturbing not, the quantized data before decoding this moment should become the identical data of symbol (positive number), thus adding of obtaining and value should be maximum.And N is big more, and A should be also big more; The scope of data-measuring (U ,+U), U is big more, and A also should be big more.According to the maximum likelihood theory, A is big more, and the reliability of decoding also should be big more.According to this analysis, it is just relevant with the A value to need to use confidential interval in step 306, choosing also of confidential interval will be chosen according to two conditions, one is the length N value behind the data block coding, another be quantized data after the demodulation scope (U ,+U), the size of U depends on the number of bits of quantification more in Digital Signal Processing herein, as 8 quantifications, then quantizing range is (127,127).The process of choosing of confidential interval is exactly to carry out correspondence by different interval and the corresponding Block Error Rates of division in [0, N*U].The A value drops in certain interval, and its corresponding Block Error Rate is exactly and this interval corresponding Block Error Rate.Interval division is thin more, and the Block Error Rate that obtains is accurate more.Can determine concrete area dividing by emulation.
When data block has multiple coded system, can adopt flow process shown in Figure 4, the Block Error Rate λ of the data block that obtains at every turn receiving in measuring period
i:
Step 401: the data block that receives is carried out deinterleaving and multiplexing process, the data sequence R before obtaining deciphering.
Supposing the demodulating data that receives, through after the quantification treatment, is R=[r before decoding
1, r
2, r
3..., r
N], wherein N represents the data length of data block behind the process coding, these data are the data that send over by channel behind the transmitting terminal coding, should be considered as information data+noise data.
Step 402: data sequence R is carried out segmentation according to different coded systems.
Owing to have multiple different coded system in the data block that receives, before decoding, need the data that receive be split according to different coded systems
Wherein i represents i encoding block, n
iRepresent the length behind the coding of i encoding block.
Step 403: according to different coded systems data segment is deciphered the data result after obtaining deciphering respectively
Wherein i represents i the data after the encoding block decoding, m
iRepresent the data bit number of this data segment data block before coding.
Step 404: each segmented data block decode results is encoded the result after obtaining encoding according to the coded system of data block
N wherein
iThe data length of expression data block behind the process coding.
Step 405: the data behind each segment data block encoding are made up the data sequence C=[c after obtaining encoding according to the mode that transmitting terminal makes up
1, c
2, c
3..., c
N], wherein N represents the data length of data block behind the process coding.
Step 406: the data sequence C after will encoding according to the mapping mode corresponding with the data-modulated mode is mapped as signed data sequence S, S=[s
1, s
2, s
3..., s
N], wherein N represents the data length of data block behind the process coding.
At different modulation systems, the back result that will encode becomes signed data according to corresponding mapping mode with (0,1) data map.As for QPSK (Quadrature Phase Shift Keying) modulation system, according to 1-＞-1,0-＞1, mode shine upon, obtain sequence S.
Step 407: calculate likelihood value A=RS
T
With sequence R and sequence S
TCarry out dot product, obtain and formula:
Step 408: likelihood value A and confidential interval are compared the Block Error Rate λ of the data block that obtains receiving
i
As seen, compare, increased corresponding processing (to the fractionation and the combination of data block) process therein with flow process shown in Figure 3.As the data in the HS-SICH channel among the TD-SCDMA, two kinds of coded systems are just arranged, and a kind of mode of repetition that adopts is encoded, the another kind of Reed-Muller coded system that adopts, just can handle according to flow process shown in Figure 4 this moment, to satisfy the situation of this multiple coded system.
In flow process shown in Figure 4,, after decoding, need encode again to all different encoding blocks, to obtain last Block Error Rate at the situation that comprises multiple different coded data block in the frame.Many for type of coding, under the also many situation of encoding block, handling like this needs the regular hour to measure to finish this task.When the processing of reality, can be according to the situation of reality, at the type of coded system, choose wherein one or more and carry out follow-up operation, thereby in the certainty of measurement allowed band, simplify the entire process process, improve treatment effeciency.
That is to say, after step 402 is carried out segmentation according to different coded systems to data sequence R, choose wherein certain or some data block as the reference block that calculates Block Error Rate.As previously mentioned in the HS-SICH channel, because two kinds of coded systems are arranged, can select for use wherein a kind of coded system and encoding block to measure piece as reference, contrast repeated encoding mode and Reed-Muller coded system, as simplify handling, can select for use wherein the part of repeated encoding to be used as the reference measure piece and handling, after having chosen the reference measure piece, the processing of back is just all carried out based on this reference measure piece, thereby can obtain The ultimate results fast.
The present technique field personnel know, when utilizing the coding standards performance curve, for different channel circumstances, the corresponding bit error rate/Block Error Rate of identical SNR (signal to noise ratio) value may be inequality.The present invention adopts the method for maximum likelihood value to carry out the setting of confidential interval, quantizing normalizing to received signal handles, to reduce the influence that the channel circumstance difference is brought to amplitude, the factor of decision decoding performance can be reduced to the Ou Ji Reed distance that receives between data and the correct decoding data, thereby in emulation, can different confidential intervals be set according to the distance size that receives between data and the correct decoding data, each interval corresponding Block Error Rate/bit error rate, bit error rate/Block Error Rate that distance is big more is big more.The number of confidential interval depends on the demand of certainty of measurement, and required precision is high more, and confidential interval is many more.All confidential intervals constitute a confidential interval table.When measuring, data behind the data decoding that receives are thought the correct data expected, try to achieve actual reception to data and above identification be the expectation correct data between actual range A after, the confidential interval that search A is positioned in the confidential interval table, thereby decoding Block Error Rate that can activity respective distances A, and can be at an easy rate by relatively just obtaining final Block Error Rate several times, and do not need to calculate SNR and know actual channel circumstance, therefore can simplify processing procedure greatly.
For free related situation between the data block, can think and also have certain relevance between the data block of receiving continuously, therefore, in order to increase the accuracy of statistics, can also be in a measuring period, the data block that at every turn receives is all carried out maximum likelihood relatively, obtain a likelihood value sequences A ', and then calculate average likelihood value in this measuring period, utilize average likelihood value to compare with the data in the confidential interval, obtain the Block Error Rate in measuring period, thereby can obtain mistake piece number.
With reference to Fig. 5, Fig. 5 is the realization flow of the inventive method second embodiment, may further comprise the steps:
Step 501: set decoding confidential interval and measuring period.
Step 502: carry out maximum likelihood relatively according to the data of the confidential interval of setting after, obtain the likelihood value sequences A ' of the data block correspondence that receives in described measuring period, A '=[A to the demodulation that receives
1, A
2, A
3..., A
K], K is the frame number of the data block received in measuring period.
The process of the data after the demodulation that receives being carried out the maximum likelihood comparison is described in detail in front, and can adopt above-mentioned different mode equally for the processing that data block has under the multiple coded system situation, does not repeat them here.
Step 503: calculate the average likelihood value in described measuring period
Step 504: the average likelihood value that will obtain
Compare with the data in the confidential interval, obtain the mistake piece number in measuring period.
With reference to Fig. 6, Fig. 6 is the theory diagram of apparatus of the present invention first embodiment:
Wherein, unit 600 is set and is used for setting decoding confidential interval and measuring period; Quantized data extraction unit 601 is used to extract needs the data sequence R that deciphers after demodulation quantizes; Decoding unit 602 is used for the data sequence R that extracts is deciphered the data result D after obtaining deciphering; Coding unit 603 is used for the data result D after the decoding is encoded the data sequence C after obtaining encoding according to the coded system of data block; Data sequence C after map unit 604 is used for will encoding according to the mapping mode corresponding with the data-modulated mode is mapped as signed data sequence S; Likelihood value computing unit 605 is used for calculating likelihood value according to data sequence R and data sequence S; Comparing unit 606 is used for the likelihood value of likelihood value computing unit output and the decoding confidential interval of setting are compared, and obtains to receive the Block Error Rate of data block; The mistake piece is counted the mistake piece number in the measuring period that estimation unit 607 is used for estimating to obtain setting according to the frame number of described Block Error Rate and the data block received in measuring period.
When concrete the application, can decipher the data block that receives in measuring period, encode, mapping, likelihood value calculate, export the likelihood value of each data block correspondence by the likelihood value computing unit, by comparing unit 606 each likelihood value and the decoding confidential interval that unit 600 settings are set are compared the Block Error Rate λ of each the data block correspondence that obtains receiving
iBeing provided with in the measuring period of setting the unit, repeat said process, obtain mistake piece sequence λ=[λ
1, λ
2, λ
3..., λ
K], K is the frame number of the data block received in measuring period; Then by comparing unit according to the average Block Error Rate that calculates the measuring period of setting the unit in this cycle is set
Should average Block Error Rate export to the mistake piece and count estimation unit 607, count the mistake piece number that estimation unit 607 was estimated in measuring period by the mistake piece
Also can decipher, encode the data block that receives in measuring period, mapping, likelihood value calculate, and obtained the likelihood value of each data block correspondence by likelihood value computing unit 605.Being provided with in the measuring period of setting the unit, repeat said process, obtain likelihood value sequences A '=[A
1, A
2, A
3..., A
K], K is the frame number of the data block received in measuring period; Then by likelihood value computing unit 605 according to being provided with that calculate the measuring period of setting the unit and average likelihood value in output measuring period
Comparing unit 606 utilizes the average likelihood value that obtains
Compare with the data in the confidential interval, obtain the Block Error Rate in measuring period, this Block Error Rate is exported to the mistake piece count estimation unit 607, count the mistake piece number that estimation unit 607 was estimated in measuring period by the mistake piece.
The front is mentioned, and in a Frame, has one or more different coded data blocks.When multiple different coded data block, need decipher respectively the different coding data block, encoding process.
Theory diagram with reference to apparatus of the present invention second embodiment shown in Figure 7:
Between quantized data extraction unit 601 and decoding unit 602, increased split cells 701, be used for the data sequence R that extracts is carried out segmentation according to the different coding mode of data block; Between map unit 604 and likelihood value computing unit 605, increased assembled unit 702, be used for the data sequence behind each segment data block encoding of described map unit output is made up the data sequence after obtaining encoding according to the mode of closing of giving identical with transmitting terminal.
The working method of other unit is identical with the description among first embodiment shown in Figure 6, does not repeat them here.
When comprising multiple different coded data block in the Frame, utilize embodiment illustrated in fig. 7 need after decoding, the coding again, to obtain last Block Error Rate to all different encoding blocks.When the data block coding code type more for a long time, in order to simplify processing, can select the data block after splitting, choose wherein one or more and carry out follow-up operation, thereby in the certainty of measurement allowed band, simplify processing procedure, improve treatment effeciency.
Theory diagram with reference to Fig. 8 apparatus of the present invention the 3rd embodiment:
In this embodiment, behind split cells 701, increased and chosen unit 801, be used for choosing the data segment that needs are measured from each segment data of split cells output.
In above-mentioned HS-SICH channel, because two kinds of coded systems are arranged, can select for use wherein a kind of coded system and encoding block to measure piece as reference, contrast repeated encoding mode and Reed-Muller coded system, handle as simplifying, can select for use wherein the part of repeated encoding to be used as the reference measure piece and handle, thereby can obtain The ultimate results fast.
After having chosen the reference measure piece, the processing of later step is all carried out based on this (a bit) reference measure piece.
As seen, utilize the present invention, can obtain no parity check data block decoding number of bit errors simply, exactly, and not rely on the actual channel environment.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (13)
1. a method of obtaining the number of decoding error block from check-free data block is characterized in that, may further comprise the steps:
A, setting decoding confidential interval and measuring period;
B, carry out maximum likelihood relatively, obtain the Block Error Rate λ of the data block that at every turn receives in described measuring period according to the data of the confidential interval of setting after to the demodulation that receives
i
C, calculating described measuring period of interior average Block Error Rate;
D, estimate to obtain mistake piece number in described measuring period according to the frame number of average Block Error Rate in described measuring period and the data block in measuring period, received.
2. method according to claim 1 is characterized in that, described step B comprises:
B1, the data block that receives is carried out deinterleaving and multiplexing process, the data sequence R before obtaining deciphering;
B2, data sequence R is deciphered the data result D after obtaining deciphering;
B3, to decoding after data result D encode according to the coded system of data block;
B4, the data sequence after will encoding according to the mapping mode corresponding with the data-modulated mode are mapped as signed data sequence S;
B5, calculating likelihood value A=RS
T, S
TTransposed sequence for sequence S;
B6, likelihood value A and described confidential interval are compared the Block Error Rate λ of the data block that obtains receiving
i
3. method according to claim 2 is characterized in that, also comprises step between described step B1 and step B2:
When having multiple different coded system in the data block that receives, data sequence R is carried out segmentation according to different coded systems.
4. method according to claim 3 is characterized in that, also comprises step between described step B1 and step B2:
Choose one or more the different coded data sections after the segmentation.
5. according to claim 3 or 4 described methods, it is characterized in that, between described step B3 and step B4, also comprise step:
Data sequence behind described each segment data block encoding is made up according to the compound mode identical with transmitting terminal.
6. a method of obtaining the number of decoding error block from check-free data block is characterized in that, may further comprise the steps:
A, setting decoding confidential interval and measuring period;
B, carry out maximum likelihood relatively, obtain the likelihood value sequences A ' of the data block correspondence that receives in described measuring period according to the data of the confidential interval of setting after to the demodulation that receives;
C, calculating described measuring period of interior average likelihood value
D, the average likelihood value that will obtain
Compare with the data in the confidential interval, obtain the Block Error Rate in measuring period;
E, estimate to obtain mistake piece number in described measuring period according to the frame number of Block Error Rate in described measuring period and the data block in measuring period, received.
7. method according to claim 6 is characterized in that, described step b comprises:
B1, the data block that receives is carried out deinterleaving and multiplexing process, the data sequence R before obtaining deciphering;
B2, data sequence R is deciphered the data result D after obtaining deciphering;
B3, to decoding after data result D encode according to the coded system of data block;
B4, the data sequence after will encoding according to the mapping mode corresponding with the data-modulated mode are mapped as signed data sequence S;
B5, calculating likelihood value A=RS
T, S
TTransposed sequence for sequence S;
B6, the data block repeating step b1 to b5 to receive in described measuring period at every turn obtain the likelihood value sequences A ' of the data block correspondence that receives in described measuring period.
8. method according to claim 7 is characterized in that, also comprises step between described step b1 and step b2:
When having multiple different coded system in the data block that receives, data sequence R is carried out segmentation according to different coded systems.
9. method according to claim 8 is characterized in that, also comprises step between described step b1 and step b2:
Choose one or more the different coded data sections after the segmentation.
10. according to Claim 8 or 9 described methods, it is characterized in that, between described step b3 and step b4, also comprise step:
Data sequence behind described each segment data block encoding is made up according to the compound mode identical with transmitting terminal.
11. a device that obtains the number of decoding error block from check-free data block is characterized in that, comprising:
The unit is set, is used for setting decoding confidential interval and measuring period;
The quantized data extraction unit, being used to extract needs the data sequence R that deciphers after demodulation quantizes;
Decoding unit is used for the data sequence R that extracts is deciphered the data result D after obtaining deciphering;
Coding unit is used for the data result D after the decoding is encoded according to the coded system of data block;
Map unit, the data sequence after being used for will encoding according to the mapping mode corresponding with the data-modulated mode is mapped as signed data sequence S;
The likelihood value computing unit is used for calculating likelihood value according to data sequence R and data sequence S;
Comparing unit is used for the likelihood value of likelihood value computing unit output and the decoding confidential interval of setting are compared, and obtains to receive the Block Error Rate of data block;
The mistake piece is counted estimation unit, is used for estimating to obtain mistake piece number in described measuring period according to the frame number of described Block Error Rate and the data block received in measuring period.
12. device according to claim 11 is characterized in that, described device also comprises:
Split cells is used for the data sequence R that extracts is carried out segmentation according to the different coding mode of data block;
Assembled unit is used for the data sequence behind each segment data block encoding of described map unit output is made up according to the compound mode identical with transmitting terminal.
13. device according to claim 12 is characterized in that, described device also comprises:
Choose the unit, be used for choosing the data segment that needs are measured from each segment data of described split cells output.
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| CN1561006A (en) * | 2004-03-02 | 2005-01-05 | 北京邮电大学 | Correlated receiver and signal receiving method for super-broad band radio communication system |
| CN1595829A (en) * | 2004-07-06 | 2005-03-16 | 中兴通讯股份有限公司 | A method and apparatus for frequency deviation estimation and compensation |
| EP1523121A1 (en) * | 2003-10-09 | 2005-04-13 | Rohde & Schwarz GmbH & Co. KG | Method for testing the error ratio BER of a device according to confidence level, test time and selectivity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1523121A1 (en) * | 2003-10-09 | 2005-04-13 | Rohde & Schwarz GmbH & Co. KG | Method for testing the error ratio BER of a device according to confidence level, test time and selectivity |
| CN1561006A (en) * | 2004-03-02 | 2005-01-05 | 北京邮电大学 | Correlated receiver and signal receiving method for super-broad band radio communication system |
| CN1595829A (en) * | 2004-07-06 | 2005-03-16 | 中兴通讯股份有限公司 | A method and apparatus for frequency deviation estimation and compensation |
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