CN1161910C - Blind rate detection method and device based on foundamental-quartic viterbi decode - Google Patents
Blind rate detection method and device based on foundamental-quartic viterbi decode Download PDFInfo
- Publication number
- CN1161910C CN1161910C CNB021000263A CN02100026A CN1161910C CN 1161910 C CN1161910 C CN 1161910C CN B021000263 A CNB021000263 A CN B021000263A CN 02100026 A CN02100026 A CN 02100026A CN 1161910 C CN1161910 C CN 1161910C
- Authority
- CN
- China
- Prior art keywords
- decoding
- value
- path
- speed
- checked
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention discloses a blind rate detection method based on foundamental-quartic viterbi decoding, which at least comprises the following steps: a) initializing all variables; b) foundamental-quartic viterbi decoding is carried out on decoding input data and the length of a decoding block is judged; if the length is an odd, the length of the decoding block is increased to an even, and the code is translated to the position of the even; c) calculating a path measuring threshold comparison value, and comparing the current threshold comparison value and the path measuring threshold value; if the current threshold comparison value is bigger than the path measuring threshold value, coming in d, and otherwise, coming in e; d) respectively carrying out backtracking and cyclic redundancy check on the rate for passing the threshold; if the check is correct, the threshold value is updated and the current rate position is recorded; e) judging the current rate to be checked is the last one; if the current rate to be checked is the last one, the recorded value of the current rate is output, and otherwise, a counter for the rate to be checked is added with 1 and returns to b. The present invention also simultaneously discloses a realization device. The method and the device can cause the decoding speed to be raised and the blind rate detection progress to be quickened, and the existing resources are fully utilized.
Description
Technical field
The present invention relates to a kind of blind rate detection technique, be meant a kind of especially based on the blind rate detection method of basic four Viterbi decodings and the device of realizing this method.
Background of invention
In the transfer of data of code division multiple access, each transmission channel can transmit the signal of multiple different rates simultaneously.If certain transmission channel includes two or more speed and do not have transformat to merge indication (TFCI), then need to come detected transmission speed by Viterbi (Viterbi) decoding and Cyclic Redundancy Check, the process of the current transmission rate of this detection promptly is called blind rate and detects.
The basic realization principle of blind rate detection method is such: at receiving terminal, receiver is learnt all possible transmission rate by upper layer network, carries out the Viterbi soft decoding then, arrives possible end bit position n in decoding
EndThe time, with this end bit position n
EndAs original position, current state is made as nought state, from then on nought state begins to recall, find out every branch road of process, recall the back that finishes resulting fullpath is carried out CRC check, if verification is correct, then current path of recalling is exported as decoding, thereby detects corresponding transmission rate.
Detect for blind rate, an important indicator weighing its algorithm quality is loss (FDR), and loss is meant that rate detection makes a mistake, and CRC check fails to detect wrong probability.At present, in order to reduce FDR, general method is to increase a kind of threshold constraints, and its basic thought is: when recalling, at first calculate the relative tolerance S (n of branch road accumulation probability according to following formula (1)
End), judge this S (n then
End) whether value satisfy the threshold requirement of formula (2), because path metric value S is (n
End) relevant with channel condition, noise size in the actual transmissions, channel condition is poor more, and noise is big more, and path metric value is just big more, so, if the S (n that calculates by formula (1)
End) value is not more than given threshold value, then present rate just can not detect and be actual transmission rate, certainly, might this speed be the speed of actual transmission, but because noise detects greatly and not very much, therefore, being provided with of threshold value D must be suitable in the formula (2), usually this value need be obtained by emulation testing under various channel conditions, noise conditions, have only satisfy threshold requirement carry out just that recall in the path and CRC check.If CRC check correctly and detects last a kind of speed, then stop to continue to detect, the data in path are recalled in output; Otherwise, proceed down a kind of detection of possibility speed.
S(n
end)＝(a
0(n
end)-a
min(n
end))/(a
max(n
end)-a
min(n
end))(1)
S (n
End)＞D (2) is S (n wherein
End) value between 0 and 1; a
Max(n
End) and a
Min(n
End) be respectively that end bit position is n
EndThe time, maximum in the survivor path of all state correspondences, minimum path metric value, a
0(n
End) be the path metric value of nought state, the size of these three path metric values is relevant with the quantification implementation method that is adopted, and is to calculate when carrying out Viterbi decoding; D is the path metric threshold value parameter of actual design, and this value is obtained by emulation testing.
According to above-mentioned basic principle as can be known, the essence of blind rate detection is exactly: the speed that surpasses the path metric threshold value is carried out Viterbi decoding and CRC check.Referring to shown in Figure 1, the specific implementation process that this blind rate detects comprises the steps: at least
1) initialization: with a variable n
EndAs rolling counters forward speed to be detected, initialize 1 is represented first speed to be checked, and speed to be checked of later every survey adds 1; Use variable S
MaxStore path tolerance threshold value, initialize D, D are setup parameter; Use variable n
End' record last detected speed, initialize 0, if in the rate detection process n
End' value is 0 always, illustrates that then speed does not detect, when last frame data can't correct decoding, whole frame data mistake; Otherwise, n
End' value is detected speed sequence number.
2) carry out basic two Viterbi decodings, and calculate current path metric thresholding comparison value S (n according to formula (1)
End), then, compare S (n according to formula (2)
End) value and D, if this thresholding comparison value S is (n
End) greater than D, then enter step 4); Otherwise, enter step 3).
3) judge whether to also have speed to be checked, if current n
EndValue is maximum, and promptly all speed to be checked have all detected and finished, and then export n
End' value; Otherwise, n
EndAdd 1, return step 2).
4) current speed by the path metric thresholding is recalled, and the data that obtain after recalling are carried out CRC check, if CRC check is correct, then relatively current path is measured thresholding comparison value S (n
End) and store path tolerance threshold value S
MaxIf, current path tolerance thresholding comparison value S (n
End) greater than store path tolerance threshold value S
Max, then put store path tolerance threshold value S
MaxBe current path tolerance thresholding comparison value S (n
End), and record present rate position, return step 3) then, otherwise, step 3) directly returned; If the CRC check mistake is also directly returned step 3).
In above-mentioned blind rate testing process, because want path metrics thresholding comparison value, so general inner Viterbi decoding is taked basic two Viterbi decodings, i.e. the coded-bit that advances of per moment when decoding (ACS).But so not only decoding speed is slow, and can further influence the speed that blind rate detects.In order to accelerate decoding speed, wish that more inner Viterbi decoding adopts basic four Viterbi decodings, i.e. two coded-bits that advance of per moment when decoding.But because the code block length difference of different rates, bit number is odd idol, if code block length is an even number, it is no problem that this method realizes; And when code block length is odd number 2 * n+1, two coded-bits because per moment advances, then decoding does not arrive the code block end, can only arrive the position of 2 * n, therefore can not directly apply mechanically formula (1) path metrics thresholding comparison value S (n
End), the problem that just can not effectively solve decoding speed like this.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of blind rate detection method and implement device based on basic four Viterbi decodings, makes it can improve decoding speed, and then the process of quickening blind rate detection, simultaneously, on the basis that keeps original performance, can make full use of existing resource.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of blind rate detection method based on basic four Viterbi decodings may further comprise the steps at least:
A. initialization speed counter to be checked, current transmission rate record value and path metric threshold value;
B. according to stack, comparison, the selection operation of optimal path in basic four Viterbi decodings, finish Viterbi soft decoding to decoding input data;
Whether the code block length of c. judging decoding is odd number, if odd number, then inner to generate value more than automatically be 0 decoding input data at basic four decoders, it is even bit that this code block length is increased by a bit, and then carry out once basic four Viterbi decodings, decoding is to this even bit position;
D. path metrics thresholding comparison value after having calculated, judges that whether current path tolerance thresholding comparison value is greater than the path metric threshold value, if then enter step e, otherwise enter step f;
E. recall in the path and Cyclic Redundancy Check to being undertaken by the speed of thresholding respectively, if CRC check is correct, then upgrade the path metric threshold value and be current path tolerance thresholding comparison value, and the currency that to put current transmission rate record value be speed counter to be checked, step f entered; Otherwise, directly enter step f;
F. judge whether current speed to be checked is last speed to be checked, if, then export current transmission rate record value, if not, speed counter then to be checked adds 1, returns the testing process that step b carries out next speed to be checked.
This method further comprises: preestablish the path metric threshold value.
Step a further comprises: initialized path metric threshold value is predefined path metric threshold value.Initialization speed counter initial value to be checked is 1, and the initial value of the current transmission rate record value of initialization is 0.
If the current transmission rate record value of output is 0, then do not detect present rate, when last frame data can't correct decoding, whole frame data mistake; Otherwise output valve is detected current transmission rate sequence number.
Value described in the step c is that 0 decoding input data number is relevant with the convolution code type.
A kind of blind rate checkout gear of realizing above-mentioned blind rate detection method, comprise the controller of the integrating device of handling decoding input data, storage memory of data, the operation of control sets apparatus for converting and write down the speed counter of speed number to be checked, memory, a controller and speed counter and integrating device interconnection, controller and memory, a speed counter intercommunication; Key is: described integrating device mainly by the thresholding comparison value arithmetic unit of base four decoding units of realizing basic four Viterbi decodings, path metrics thresholding comparison value, select to recall the path path selector, handle the thresholding renovator of recalling processor, Cyclic Redundancy Check device and upgrading current path tolerance threshold value of recalling the path and constitute; Decoding input data inputs to the base four decoding units decoding of this integrating device, decode results is sent into thresholding comparison operation device, via thresholding comparison operation device, path selector, recall processor, CRC check device, thresholding renovator to the decoding data sequential processes after, export current transmission rate and decoding dateout.
Described basic four decoding unit inside are provided with and can generate the module that value more than is 0 decoding input data automatically.
When result of determination not simultaneously, all can return the input of basic four decoding units from the output of the output of the output of thresholding comparison operation device or CRC check device or thresholding renovator.
By such scheme as can be seen, key of the present invention is: base two Viterbi decodings during blind rate is detected change basic four Viterbi decodings into, accordingly, when code block length is odd number, automatically in 2 of the inner increases of decoder or 3 outside decoding inputs 0, make code block length become even number, and then, detect present rate by unified formula path metrics thresholding comparison value.
Therefore, blind rate detection method and implement device based on basic four Viterbi decodings provided by the present invention, be applicable to the third generation point-to-point (3GPP) communication system, because it is a kind of method that basic four Viterbi decodings and blind rate are detected on one that merges, improves simultaneously and upgraded respective paths and measure thresholding comparison value S (n
End) computing formula, odd number code block length and verso block length are handled respectively, both kept original blind rate to detect performance based on base two decodings, blind rate is detected on the basis of base four decodings carries out smoothly, improve decoding speed again, also accelerated the speed that blind rate detects simultaneously.In addition,, simplified original handling process, realized simpler, convenient, flexible owing to this method and apparatus code-aiming block length is divided strange, idol processing.
Description of drawings
Fig. 1 is the flow chart that blind rate detects in the prior art;
The flow chart that Fig. 2 detects for blind rate among the present invention;
Fig. 3 is the structural representation of blind rate detector of the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Because base four decodings base two decodings relatively can improve decoding speed, can keep performance constant again.Therefore, the present invention detects base four decodings and well merges with blind rate, and the blind rate of finishing based on basic four Viterbi decodings detects.
Referring to shown in Figure 2, blind rate detection method of the present invention specifically comprises the steps:
1) initialization: with a variable n
EndAs rolling counters forward speed to be detected, initialize is 1, represents first speed to be checked, and speed to be checked of later every survey adds 1, then n
EndValue reality is current speed sequence number to be checked; Use variable S
MaxStore path tolerance threshold value, initialize is D, D is a preset parameters; Use variable n
End' record last detected speed, initialize is 0, if in the rate detection process n
End' value does not change is 0 always, illustrates that then speed does not detect, when last frame data can't correct decoding, whole frame data mistake.
2) decoding: carry out stack, comparison, the selection operation of optimal path in basic four Viterbi decodings, finish the Viterbi soft decoding.
3) if the code block length of step 2 decoding, promptly the bit number in encoding block is an even number, then by calculating thresholding comparison value module 23 (1) path metrics thresholding comparison value S (n by formula
End), if the code block length of step 2 decoding is an odd number, then calculate thresholding comparison value module 23 ' (3) path metrics thresholding comparison value S (n by formula by another
* End).Formula (3) is identical with the basic thought and the computation structure of formula (1), just when the bit end position of a certain speed is odd number 2 * n+1, because the position that base four decodings do not reach 2 * n+1, the present invention is in 2 of the inner increases automatically of basic four decoders or 3 outside decoding inputs 0, that is: make code block length increase by a bit and become virtual even bit 2 * n+2, because the input data values that increases is 0, can not influence final rate detection result.Specific implementation is: if 1/2 convolution code, then inner to produce 2 values be 0 decoding input data at basic four decoders accordingly, if 1/3 convolution code, then inner to produce 3 values be 0 decoding input data at basic four decoders accordingly; And then carry out an ACS and operate the position of promptly deciphering this even bit 2 * n+2; At last at 2 * n+2 position calculation path metric thresholding comparison value S (n
End), be not true code block bit end position this moment, with another variable S (n
* End) expression.If a
Max(n
* End) and a
Min(n
* End) be respectively maximum, minimum path metric value in the survivor path of bit end position all state correspondences when being 2 * n+2, a
0(n
* End) be the path metric value of nought state, D is the threshold parameter of actual set, then:
S(n
* end)＝(a
0(n
* end)-a
min(n
* end))/(a
max(n
* end)-a
min(n
* end))(3)
S(n
* end)＞D (4)
4) after path metric thresholding comparison value calculates and finishes, carry out threshold judgement, if current path tolerance thresholding comparison value is greater than store path tolerance threshold value S according to formula (4)
Max, then enter step 5, otherwise enter step 6.
5) respectively to recalling and CRC check by the speed of thresholding, if CRC check is correct, then updated stored path metric threshold value is a current path tolerance thresholding comparison value, and record present rate position, promptly puts n
End' be current n
EndValue enters step 6 then; If the CRC check mistake then directly enters step 6.
6) judge whether current speed to be checked is last speed to be checked, if last speed to be checked, then output variable n
End', at this moment, if n
End' output valve is 0, then explanation does not detect present rate, otherwise, n
End' output valve be the sequence number of the speed that detects; If current speed to be checked is not last speed to be checked, then with counter n
EndAdd 1, return the testing process that step 2 is carried out next speed to be checked again.
Just because of the present invention has improved path metric thresholding comparison value S (n
End) computing formula, just unified base four decodings and the co-ordination that blind rate detects, guaranteed the raising of decoding speed, making blind rate detect again can carry out on the bases of base four decodings smoothly, simultaneously, has utilized existing resource fully, has kept existing performance.
In third generation Wideband Code Division Multiple Access (WCDMA) (WCDMA) mobile communication system, launch some kinds of possible speed when but not informing that by TFCI receiver specifically is any speed when transmitter, the device of implementing by blind rate detection method of the present invention can detect correct current transmission rate automatically.Such as: in call establishment, the speed that the transmitter of high-rise notifying user equipment (UE) may be launched has 9 kinds: 12.2kbps, 10.2kbps, 7.95kbps, 7.4kbps, 6.7kbps, 5.9kbps, 5.15kbps, 4.75kbps 1.95kbps is then according to known in advance channel coding schemes, tail bit length, decoding input quantizing bit number, just can be according to the step of above-mentioned blind rate detection method, detecting current transmission rate by blind rate detector shown in Figure 3 is any in 9 kinds.
Fig. 3 is for realizing the blind rate detector arrangement schematic diagram of above-mentioned blind rate detection method, and as shown in Figure 3, this blind rate detector 11 comprises integrating device 7, memory 8, controller 9 and a speed counter 10 at least.The decoding input data of input, after integrating device 7 processing, export detected current transmission rate and decoding dateout, this integrating device 7 mainly by basic four ACS unit 1, thresholding comparison value arithmetic unit 2, path selector 3, recall processor 4, CRC check device 5 and thresholding renovator 6 and constitute, the data access in integrating device 7 runnings is finished by controller 9 and memory 8.
Referring to shown in Figure 3, blind rate detector 11 reads in the decoding input data of 66 bit quantizations at every turn, give basic four ACS unit 1 and decipher processing, if code block length is an even number, when then decoding constantly reaches the code block end, just start thresholding comparison value arithmetic unit 2 (1) calculating current path tolerance thresholding comparison value by formula, and compare with predefined path metric threshold value; If code block length is an odd number, when i.e. decoding constantly reaches the code block end and differs from a bit, then by 2 or 3 decoding inputs 0 of basic four ACS unit, 1 inner increase automatically, make code block length increase by a bit, become even number, and then carry out an ACS and operate, decoding is to the end bit of this virtual code block, afterwards, start thresholding comparison value arithmetic unit 2 (3) calculating current path tolerance thresholding comparison value by formula, and with predefined path metric threshold value relatively, the path metric thresholding comparison value of above-mentioned current calculating and the calculating of predetermined threshold value with control by controller 9 more fully.Path selector 3 is used for selecting to recall the path, will see that whether current path tolerance thresholding comparison value is by the path metric thresholding but whether recall processing.If recall processing, then in recalling processor 4, recall earlier, continue in CRC check device 5, to carry out CRC check afterwards, when CRC check is correct, upgrade the path metric thresholding by thresholding renovator 6, and in memory 8, write down current transmission rate position simultaneously, and then a through-rate counter 10 knows whether the speed of current detection is last speed to be detected, if, the decoding data of then exporting detected speed and translating simultaneously.If current path tolerance thresholding comparison value promptly need not recalled processing not by the path metric thresholding; Perhaps CRC check mistake; Speed perhaps to be checked has not all been examined, and all will directly turn back to the detection that basic four ACS unit 1 descend a kind of speed again.
Claims (8)
1, a kind of blind rate detection method based on basic four Viterbi decodings is characterized in that this method may further comprise the steps at least:
A. initialization speed counter to be checked, current transmission rate record value and path metric threshold value;
B. according to stack, comparison, the selection operation of optimal path in basic four Viterbi decodings, finish Viterbi soft decoding to decoding input data;
Whether the code block length of c. judging decoding is odd number, if odd number, then inner to generate value more than automatically be 0 decoding input data at basic four decoders, it is even bit that this code block length is increased by a bit, and then carry out once basic four Viterbi decodings, decoding is to this even bit position;
D. path metrics thresholding comparison value after having calculated, judges that whether current path tolerance thresholding comparison value is greater than the path metric threshold value, if then enter step e, otherwise enter step f;
E. recall in the path and Cyclic Redundancy Check to being undertaken by the speed of thresholding respectively, if CRC check is correct, then upgrade the path metric threshold value and be current path tolerance thresholding comparison value, and the currency that to put current transmission rate record value be speed counter to be checked, step f entered; Otherwise, directly enter step f;
F. judge whether current speed to be checked is last speed to be checked, if, then export current transmission rate record value, if not, speed counter then to be checked adds 1, returns the testing process that step b carries out next speed to be checked.
2, method according to claim 1 is characterized in that this method further comprises: preestablish the path metric threshold value.
3, method according to claim 1 and 2 is characterized in that step a further comprises: initialized path metric threshold value is predefined path metric threshold value.
4, method according to claim 1 is characterized in that step a further comprises: initialization speed counter initial value to be checked is 1, and the initial value of the current transmission rate record value of initialization is 0.
5, according to claim 1 or 4 described methods, it is characterized in that: if the current transmission rate record value of output is 0, then do not detect present rate, when last frame data can't correct decoding, whole frame data mistake; Otherwise output valve is detected current transmission rate sequence number.
6, method according to claim 1 is characterized in that: value described in the step c is that 0 decoding input data number is relevant with the convolution code type.
7, a kind of blind rate checkout gear of realizing above-mentioned blind rate detection method, comprise the controller of the integrating device of handling decoding input data, storage memory of data, the operation of control sets apparatus for converting and write down the speed counter of speed number to be checked, memory, a controller and speed counter and integrating device interconnection, controller and memory, a speed counter intercommunication; It is characterized in that: described integrating device mainly by the thresholding comparison value arithmetic unit of base four decoding units of realizing basic four Viterbi decodings, path metrics thresholding comparison value, select to recall the path path selector, handle the thresholding renovator of recalling processor, Cyclic Redundancy Check device and upgrading current path tolerance threshold value of recalling the path and constitute; Decoding input data inputs to the base four decoding units decoding of this integrating device, decode results is sent into thresholding comparison operation device, via thresholding comparison operation device, path selector, recall processor, CRC check device, thresholding renovator to the decoding data sequential processes after, export current transmission rate and decoding dateout.
8, method according to claim 7 is characterized in that: described basic four decoding unit inside are provided with and can generate the module that value more than is 0 decoding input data automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021000263A CN1161910C (en) | 2002-01-08 | 2002-01-08 | Blind rate detection method and device based on foundamental-quartic viterbi decode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021000263A CN1161910C (en) | 2002-01-08 | 2002-01-08 | Blind rate detection method and device based on foundamental-quartic viterbi decode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1433170A CN1433170A (en) | 2003-07-30 |
| CN1161910C true CN1161910C (en) | 2004-08-11 |
Family
ID=27626958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021000263A Expired - Fee Related CN1161910C (en) | 2002-01-08 | 2002-01-08 | Blind rate detection method and device based on foundamental-quartic viterbi decode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1161910C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101001128B (en) * | 2006-06-22 | 2010-05-12 | 华为技术有限公司 | Method and equipment for detecting reliability of decode |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110719140B (en) * | 2018-07-13 | 2022-03-11 | 北京小米松果电子有限公司 | Transmission format blind detection method and device, storage medium and electronic equipment |
-
2002
- 2002-01-08 CN CNB021000263A patent/CN1161910C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101001128B (en) * | 2006-06-22 | 2010-05-12 | 华为技术有限公司 | Method and equipment for detecting reliability of decode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1433170A (en) | 2003-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1101997C (en) | Method and apparatus for rate determination in communication system | |
| US6678857B2 (en) | Efficient iterative decoding | |
| CN1266868C (en) | Decoder and decoding method | |
| JP3556943B2 (en) | Apparatus and method for stopping iterative decoding in code division multiple access mobile communication system | |
| CN1150681C (en) | System and method for selecting cyclic redundancy check generators in concatenated code | |
| CN1227816C (en) | Efficient trellis state metric normalization | |
| CN1306713C (en) | Error correction in CDMA mobile communication system using turbo codes | |
| JP3553547B2 (en) | Apparatus and method for detecting data rate in mobile communication system | |
| CN1266577A (en) | Method and apparatus for determining the rate of received data in a variable rate communication a debit variable | |
| CN1886926A (en) | Method and device for calculating the bit error rate of received signal | |
| KR20010103653A (en) | W-cdma transmission rate estimation method and device | |
| CN100389551C (en) | Channel blind detecting method | |
| CN1237300A (en) | Interference mitigation by joint detection of cochannel signals | |
| CN1316829A (en) | Error correction coding type digital transmission method | |
| CN1298131C (en) | Receiver apparatus and communication method | |
| US6981060B2 (en) | Compression based on channel characteristics | |
| CN1240187C (en) | Method and appts. for recovery of particular bits of received frame | |
| CN1369140A (en) | ACS unit for viterbi decoder | |
| CN1130852C (en) | Equalizer with channel tracker switching | |
| CN1901430A (en) | System and method for blind transport format detection with cyclic redundancy check | |
| CA2424155C (en) | Apparatus and method for detecting transmitting rate of turbo decoder | |
| CN1153397C (en) | Bit detection method in a radio communication system | |
| CN1161910C (en) | Blind rate detection method and device based on foundamental-quartic viterbi decode | |
| CN1578190A (en) | Uplink macro diversity method | |
| CN1741614A (en) | Method and system for decoding video, voice, and speech data using redundancy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040811 Termination date: 20200108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |