CN101282193B - System and method for transmission of data - Google Patents
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- CN101282193B CN101282193B CN2007100873845A CN200710087384A CN101282193B CN 101282193 B CN101282193 B CN 101282193B CN 2007100873845 A CN2007100873845 A CN 2007100873845A CN 200710087384 A CN200710087384 A CN 200710087384A CN 101282193 B CN101282193 B CN 101282193B
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Abstract
The present invention discloses a data transmission method and a system thereof, wherein the method comprises the following steps: step 1, executing Turbo coding by the transmission end according to a 1/3 speed, and respectively outputting a system bit X, a first correction bit Y1 and a second correction bit Y2 corresponding with the system bit; step 2, taking a certain bit number to a period by the system bit X, the first correction information Y1 and the second correction information Y2 corresponding with the system bit X, and deleting or reserving certain bit in each period; step 3, multiplexing the bit data processed by a perforator, and adding the deleted bits with the rear bits to obtain the data and transmit the data to the receiving end; and a procedure 4, when the receiving end receives the data, adding 0 at the position of bit deleted in the step2, rearward moving the data at the position and decoding according to the 1/3 decoding speed. Through improving the perforating mode of the perforator, the method according the invention has the advantages of effective overcoming to the error flat-layer effect generated in the traditional perforating mode, more abrupt curve of the error bit rate, increased decoding performance and prolonged service lifetime of battery.
Description
Technical field
The present invention relates to the communications field, relate in particular to high code rate data transmission system and data transmission method.
Background technology
Turbo code is the very strong sign indicating number of a kind of error correcting capability, and its encoder is made of the mode of two or more sub-encoders by serial or parallel connection.Usually, generally the Turbo encoder of Shi Yonging is to be formed in parallel by two recursive convolution sub-encoders, sub-encoders 1 is directly sent in a road of input information position, sub-encoders 2 is then sent into through after interweaving in another road, data behind the sign indicating number have been compiled through after the card punch punching, carry out multiple connection again, can obtain suitable code check output.
The Turbo encoder that uses in the LTE agreement is made of two encoders parallel connections.Fig. 1 is the structure chart of Turbo code encoder used among the LTE.As shown in Figure 1, this encoder comprises recursive convolutional encoder device 1, recursive convolutional encoder device 2, interleaver, card punch and multiple connection.The effect of this encoder is that the order of input data is carried out layout again, thereby adjust the distribution of weight, so that the weight distribution of the incoming bit stream of recursive convolutional encoder device 1 is different with the weight distribution of the incoming bit stream of recursive convolutional encoder device 2, and to the bit stream of two recursive convolutional encoder devices output punch sampling and and string conversion.
The decoding of Turbo code can be adopted maximum likelihood method decoding (for example SOVA) algorithm, also can adopt maximum posteriori decoding (MAP) algorithm, and these two kinds of methods are all used the mode of recursive iteration in the Turbo decoding.
Turbo code causes time delay bigger, thereby produces wrong flat bed effect owing to need interweave and iterative decoding, therefore is applied in usually in the real-time less demanding data transmission service.In WCDMA and CDMA2000 standard, all adopted the channel coding/decoding mode of the Turbo code of parallel cascade as data service.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of high code rate data transmission system and method, technical scheme of the present invention can effectively overcome the wrong flat bed effect of using traditional hole knockout to produce, thereby improves decoding performance.
For achieving the above object, data transmission method according to an aspect of the present invention obtains higher code check by 1/3 code check, this method comprises: step 1, transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof; Step 2, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, the 4th bit of deletion systematic bits X keeps all the other systematic bits; Delete the 2nd bit of the first check bit Y1, keep all the other first check bits; Delete the 1st bit and the 3rd bit of the second check bit Y2, keep all the other second check bits; Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of this 1/2 code rate is sent to receiving terminal with the data that obtain 1/2 code rate; After step 4, receiving terminal received data from transmitting terminal, the bit locations of deletion mended 0 during with coding, the data at this place successively after and decode according to 1/3 code rate.
Data transmission system according to an aspect of the present invention comprises: data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, the 4th bit of data sending device deletion systematic bits X keeps all the other systematic bits; Delete the 2nd bit of the first check bit Y1, keep all the other first check bits; Delete the 1st bit and the 3rd bit of the second check bit Y2, keep all the other second check bits, and the data after will handling carry out multiple connection, and the bit of deletion is filled successively by the bit of back, are sent to data sink with the data that obtain 1/2 code rate and with data; And data sink, be used for after the data that receive from transmitting terminal, the bit locations of when coding deletion is mended 0, the data at this place are moved after successively and decode according to 1/3 code rate.
Data transmission method according to a further aspect in the invention comprises: step 1, and transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof; Step 2, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, the 1st bit of deletion systematic bits X keeps all the other systematic bits; Delete the 2nd and the 4th bit of the first check bit Y1, keep all the other first check bits; Delete the 2nd, the 3rd and the 4th bit of the second check bit Y2, keep all the other second check bits; Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of this 2/3 code rate is sent to receiving terminal with the data that obtain 2/3 code rate; After step 4, receiving terminal received data from transmitting terminal, the bit locations of deletion mended 0 during with coding, the data at this place are moved after successively and decodes according to 1/3 code rate.
Data transmission system according to a further aspect in the invention comprises: data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, the 1st bit of data sending device deletion systematic bits X keeps all the other systematic bits; Delete the 2nd and the 4th bit of the first check bit Y1, keep all the other first check bits; Delete the 2nd, the 3rd and the 4th bit of the second check bit Y2, keep all the other second check bits, and the data after will handling carry out multiple connection, and the bit of deletion is filled successively by the bit of back, are sent to data sink with the data that obtain 2/3 code rate and with data; And data sink, be used for after the data that receive from transmitting terminal, the bit locations of when coding deletion is mended 0, the data at this place are moved after successively and decode according to 1/3 code rate.
Data transmission method according to a further aspect in the invention is characterized in that comprising: step 1, and transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof; Step 2, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 3 bits all, in each cycle, the 3rd bit of deletion systematic bits X keeps all the other systematic bits; Delete the 1st and the 2nd bit of the first check bit Y1, keep all the other first check bits; Delete the 1st and the 2nd bit of the second check bit Y2, keep all the other second check bits; Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of this 3/4 code rate is sent to receiving terminal with the data that obtain 3/4 code rate; After step 4, receiving terminal received data from transmitting terminal, the bit locations of deletion mended 0 during with coding, the data at this place are moved after successively and decodes according to 1/3 code rate.
Data transmission system according to a further aspect in the invention comprises: data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 3 bits all, in each cycle, the 3rd bit of data sending device deletion systematic bits X keeps all the other systematic bits; Delete the 1st and the 2nd bit of the first check bit Y1, keep all the other first check bits; Delete the 1st and the 2nd bit of the second check bit Y2, keep all the other second check bits, and the data after will handling carry out multiple connection, and the bit of deletion is filled successively by the bit of back, are sent to data sink with the data that obtain 3/4 code rate and with data; And data sink, be used for after the data that receive from transmitting terminal, the bit locations of when coding deletion is mended 0, the data at this place are moved after successively and decode according to 1/3 code rate.
Data transmission method according to a further aspect in the invention comprises: step 1, and transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof; Step 2, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 5 bits all, in each cycle, the 5th bit of deletion systematic bits X keeps all the other systematic bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the first check bit Y1, keep all the other first check bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the second check bit Y2, keep all the other second check bits; Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of this 5/6 code rate is sent to receiving terminal with the data that obtain 5/6 code rate; After step 4, receiving terminal received data from transmitting terminal, the bit locations of deletion mended 0 during with coding, the data at this place are moved after successively and decodes according to 1/3 code rate.
Data transmission system according to a further aspect in the invention comprises: data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 5 bits all, in each cycle, the 5th bit of data sending device deletion systematic bits X keeps all the other systematic bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the first check bit Y1, keep all the other first check bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the second check bit Y2, keep all the other second check bits, and the data after will handling are carried out multiple connection, the bit of deletion is filled successively by the bit of back, is sent to data sink with the data that obtain 5/6 code rate and with data; And data sink, be used for after the data that receive from transmitting terminal, the bit locations of when coding deletion is mended 0, the data at this place are moved after successively and decode according to 1/3 code rate.
In the present invention, the characteristics of hole knockout are that systematic bits is deleted.
The invention provides the data transmission system method of unifying, the improvement by to the hole knockout of card punch can effectively overcome the wrong flat bed effect that traditional hole knockout produces, and makes the bit error rate curve more precipitous, improves decoding performance and extends the life of a cell.
Description of drawings
Shuo Ming accompanying drawing is used to provide further understanding of the present invention herein, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the Turbo coder structure figure of parallel cascade (PCCC) convolution code used in LTE;
Fig. 2 is the flow chart according to the data transmission method of the embodiment of the invention;
Fig. 3 is the standard drilling method of Turbo code and the simulation curve comparison diagram of drilling method of the present invention; And
Fig. 4 is the structural representation according to the data transmission system of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is described in detail.
The present invention is primarily aimed at the card punch of the Turbo encoder of the parallel cascade that uses (PCCC) convolution code shown in Figure 1 to propose in LTE.The use of card punch is to design for obtaining higher code rate, also is the key point in the transfer of data.
Be to be applicable to 1/3Turbo to be encoded to the hole knockout that female sign indicating number obtains higher Turbo code rate shown in the table 1.Wherein, " 1 " expression keeps this locational Bit data, this locational Bit data of " 0 " expression deletion.
As shown in table 1, traditional hole knockout has kept the information of all systematic bits X, only obtains high code rate by check bit Y1 and Y2 are punched by the hole knockout shown in the table.Therefore, when two-forty Turbo encodes, after bit error rate drops to a certain degree with the increase of signal to noise ratio, descend slowly even situation about no longer reducing will occur, be commonly referred to as wrong flat bed.
The standard hole knockout of table 1:Turbo coding
| Code rate | The punching pattern |
| 1/2 | X＝[11]?Y1＝[10]Y2＝[10] |
| 2/3 | X＝[1111]?Y1＝[1000]Y2＝[0010] |
| 3/4 | X＝[111111]?Y1＝[100000]Y2＝[000100] |
| 5/6 | X＝[1111111111]?Y1＝[1000000000]Y2＝[0000010000] |
Table 2 is that the present invention proposes to be applicable to 1/3Turbo and is encoded to the hole knockout that female sign indicating number obtains higher Turbo code rate.Wherein, " 1 " expression keeps this locational Bit data, this locational Bit data of " 0 " expression deletion.
As shown in table 2, hole knockout of the present invention not only punches shown in table to check bit Y1 and Y2, and systematic bits X is punched.With the output of 1/3Turbo coding as female sign indicating number punch handle after, can obtain 1/2,2/3,3/4,5/6 code rate.
Be that example is described in detail data transmission method of the present invention in conjunction with Fig. 2 with 1/2 code check below.
Table 2: the hole knockout of Turbo coding of the present invention
| Code rate | The punching pattern |
| 1/2 | X＝[1110]?Y1＝[1011]Y2＝[0101] |
| 2/3 | X＝[0111]?Y1＝[1010]Y2＝[1000] |
| 3/4 | X＝[110]?Y1＝[001]Y2＝[001] |
| 5/6 | X＝[11110]?Y1＝[00001]Y2＝[00001] |
As shown in Figure 2, data transmission method of the present invention may further comprise the steps:
S202 carries out the Turbo coding according to 1/3 speed, output system bit X, and corresponding check bit Y1 respectively, check bit Y2.
S204, according to the hole knockout shown in the table 2 respectively to the resulting systematic bits X that encodes of Turbo among the S202, check bit bit Y1, the check bit bit Y2 processing of punching.When 1/2 code check, per 4 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits X, delete its 4th bit, keep all the other systematic bits; For check bit Y1, delete its 2nd bit, keep all the other check bits; For check bit Y2, delete its 1st and the 3rd bit, keep all the other check bits.
S206 carries out multiple connection to the data after the punching processing, and the bit of deleting during multiple connection is filled successively by the bit of back, obtains the data of 1/2 code check.
S208, before receiving terminal decoding, the punch position during at first to coding carries out data and recovers, and the bit locations of deletion mends 0 when being about to encode, and the data at this place are moved after successively, getting final product by 1/3 code check decoding then.
So just realized being output as female sign indicating number, obtained the Turbo code of 1/2 code check by the card punch punching with the 1/3Turbo coding.
Code check for 2/3,3/4,5/6, the entire method flow process is the same, mainly is that the sign indicating number position of the bit in described each cycle when the second step punching is handled and reservation and deletion is different with the situation of 1/2 code rate.
During 2/3 code check, per 4 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits, delete its 1st bit, keep all the other systematic bits; For check bit Y1, delete its 2nd and the 4th bit, keep all the other check bits; For check bit Y2, delete its 2nd, the 3rd and the 4th bit, keep all the other check bits.
During 3/4 code check, per 3 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits, delete its 3rd bit, keep all the other systematic bits; For check bit Y1, delete its 1st and the 2nd bit, keep the 3rd bit; For check bit Y2, delete its 1st and the 2nd bit, keep the 3rd bit.
During 5/6 code check, per 5 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits, delete its 5th bit, keep all the other systematic bits; For check bit Y1, delete its 1st, the 2nd, the 3rd, the 4th bit, keep the 5th bit; For check bit Y2, delete its 1st, the 2nd, the 3rd, the 4th bit, keep the 5th bit.
The characteristics of the hole knockout of data transmission method of the present invention are that systematic bits is deleted.Adopt such hole knockout, purpose is the free distance that increases systematic bits, thereby effectively overcomes the wrong flat bed effect that traditional hole knockout produces, and makes the bit error rate curve more precipitous, as shown in Figure 3.The decoding performance of the hole knockout of data transmission method of the present invention improves a lot than the decoding performance of traditional hole knockout, particularly when high code rate, thereby make UE (User equipment, subscriber equipment) end reduce rated output, extend the life of a cell.
Be that example specifically describes data transmission system of the present invention in conjunction with Fig. 4 with 1/2 code check below.
Comprise with data transmission system of the present invention: data sending device 402, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, the 4th bit of data sending device deletion systematic bits X keeps all the other systematic bits; Delete the 2nd bit of the first check bit Y1, keep all the other first check bits; Delete the 1st bit and the 3rd bit of the second check bit Y2, keep all the other second check bits, and the data after will handling carry out multiple connection, and the bit of deletion is filled successively by the bit of back, are sent to data sink with the data that obtain 1/2 code rate and with data; And data sink 404, be used for after the data that receive from transmitting terminal, the bit locations of when coding deletion is mended 0, and the data at this place are moved after successively, getting final product by 1/3 code check decoding then.
Code check for 2/3,3/4,5/6, whole system roughly are the same, mainly are different with the situation of 1/2 code rate at the bit of the bit in described cycle and reservation and deletion.
For 2/3 code check, per 4 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits, delete its 1st bit, keep all the other systematic bits; For check bit Y1, delete its 2nd and the 4th bit, keep all the other check bits; For check bit Y2, delete its 2nd, the 3rd and the 4th bit, keep all the other check bits.
For 3/4 code check, per 3 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits, delete its 3rd bit, keep all the other systematic bits; For check bit Y1, delete its 1st and the 2nd bit, keep the 3rd bit; For check bit Y2, delete its 1st and the 2nd bit, keep the 3rd bit.
For 5/6 code check, per 5 bits of systematic bits and corresponding check bit are one-period.In each cycle, for systematic bits, delete its 5th bit, keep all the other systematic bits; For check bit Y1, delete its 1st, the 2nd, the 3rd, the 4th bit, keep the 5th bit; For check bit Y2, delete its 1st, the 2nd, the 3rd, the 4th bit, keep the 5th bit.
Suitable expansion of the present invention also is fit to other Turbo code rate.
Those skilled in the art will readily understand additional advantages and modifications of the present invention.Therefore, above-mentioned at embodiment be described as the concrete Application Example of the present invention, the present invention aspect widely is not limited to the specific detail and the exemplary embodiments that illustrate and describe herein.Therefore, can under the condition that does not break away from by claim and the spirit or scope of the present invention that equivalent limited thereof, make various modifications.
Claims (8)
1. data transmission method is characterized in that comprising:
Step 1, transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof;
Step 2, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, delete the 4th bit of described systematic bits X, keep all the other systematic bits; Delete the 2nd bit of the described first check bit Y1, keep all the other first check bits; Delete the 1st bit and the 3rd bit of the described second check bit Y2, keep all the other second check bits;
Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of described 1/2 code rate is sent to receiving terminal with the data that obtain 1/2 code rate;
After step 4, described receiving terminal received data from described transmitting terminal, the bit locations of deletion mended 0 during with coding, the data at this place are moved after according to this and decodes according to 1/3 code rate.
2. data transmission system is characterized in that comprising:
Data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, described data sending device is deleted the 4th bit of described systematic bits X, keeps all the other systematic bits; Delete the 2nd bit of the described first check bit Y1, protect
Stay all the other first check bits; Delete the 1st bit and the 3rd bit of the described second check bit Y2, keep all the other second check bits, and the coding after will handling carries out multiple connection, and the bit of deletion is filled successively by the bit of back, is sent to data sink with the data that obtain 1/2 code rate and with described data; And described data sink, be used for after the data that receive from described transmitting terminal, the bit locations of when coding deletion is mended 0, the data of this position are moved after successively and decode according to 1/3 code rate.
3. data transmission method is characterized in that comprising:
Step 1, transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof;
Step 2, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, delete the 1st bit of described systematic bits X, keep all the other systematic bits; Delete the 2nd and the 4th bit of the described first check bit Y1, keep all the other first check bits; Delete the 2nd, the 3rd and the 4th bit of the described second check bit Y2, keep all the other second check bits;
Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of described 2/3 code rate is sent to receiving terminal with the data that obtain 2/3 code rate;
After step 4, described receiving terminal received data from described transmitting terminal, the bit locations of deletion mended 0 during with coding, the data at this place are moved after successively and decodes according to 1/3 code rate.
4. data transmission system is characterized in that comprising:
Data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 4 bits all, in each cycle, described data sending device is deleted the 1st bit of described systematic bits X, keeps all the other systematic bits; Delete the 2nd and the 4th bit of the described first check bit Y1, keep all the other first check bits; Delete the 2nd, the 3rd and the 4th bit of the described second check bit Y2, keep all the other second check bits, and the data after will handling are carried out multiple connection, the bit of deletion is filled successively by the bit of back, is sent to data sink with the data that obtain 2/3 code rate and with described data; And
Described data sink is used for after the data that receive from described transmitting terminal, and the bit locations of when coding deletion is mended 0, the data at this place are moved after successively and decodes according to 1/3 code rate.
5. data transmission method is characterized in that comprising:
Step 1, transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof;
Step 2, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 3 bits all, in each cycle, delete the 3rd bit of described systematic bits X, keep all the other systematic bits; Delete the 1st and the 2nd bit of the described first check bit Y1, keep all the other first check bits; Delete the 1st and the 2nd bit of the described second check bit Y2, keep all the other second check bits;
Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of described 3/4 code rate is sent to receiving terminal with the data that obtain 3/4 code rate;
After step 4, described receiving terminal received data from described transmitting terminal, the bit locations of deletion mended 0 during with coding, and decodes according to 1/3 code rate.
6. data transmission system is characterized in that comprising:
Data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 3 bits all, in each cycle, described data sending device is deleted the 3rd bit of described systematic bits X, keeps all the other systematic bits; Delete the 1st and the 2nd bit of the described first check bit Y1, keep all the other first check bits; Delete the 1st and the 2nd bit of the described second check bit Y2, keep all the other second check bits, and the data after will handling carry out multiple connection, and the bit of deletion is filled successively by the bit of back, are sent to data sink with the data that obtain 3/4 code rate and with described data; And described data sink, be used for after the data that receive from described transmitting terminal, the bit locations of when coding deletion is mended 0, the data at this place are moved after successively and decode according to 1/3 code rate.
7. data transmission method is characterized in that comprising:
Step 1, transmitting terminal carries out the Turbo coding according to 1/3 speed, respectively output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof;
Step 2, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 5 bits all, in each cycle, delete the 5th bit of described systematic bits X, keep all the other systematic bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the described first check bit Y1, keep all the other first check bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the described second check bit Y2, keep all the other second check bits;
Step 3 is carried out multiple connection with the data after handling, and the bit of deletion is filled successively by the bit of back, also the data of described 5/6 code rate is sent to receiving terminal with the data that obtain 5/6 code rate;
After step 4, described receiving terminal received data from described transmitting terminal, the bit locations of deletion mended 0 during with coding, and decodes according to 1/3 code rate.
8. data transmission system is characterized in that comprising:
Data sending device, be used for carrying out the Turbo coding according to 1/3 speed, difference output system bit X and the corresponding first check bit Y1 and the second check bit Y2 thereof, wherein, described systematic bits X and the corresponding first check bit Y1 and the second check bit Y2 thereof are one-period with 5 bits all, in each cycle, described data sending device is deleted the 5th bit of described systematic bits X, keeps all the other systematic bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the described first check bit Y1, keep all the other first check bits; Delete the 1st, the 2nd, the 3rd and the 4th bit of the described second check bit Y2, keep all the other second check bits, and the data after will handling are carried out multiple connection, the bit of deletion is filled successively by the bit of back, is sent to data sink with the data that obtain 5/6 code rate and with described data; And
Described data sink is used for after the data that receive from described transmitting terminal, and the bit locations of deletion mends 0 during with coding, and decodes according to 1/3 code rate.
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|---|---|---|---|---|
| CN102611528A (en) * | 2008-07-31 | 2012-07-25 | 华为技术有限公司 | Method and device for punching bit stream after Turbo encoding |
| CN101436865B (en) * | 2008-07-31 | 2012-01-04 | 华为技术有限公司 | Method and apparatus for perforating bit stream after Turbo encode |
| JP4898858B2 (en) * | 2009-03-02 | 2012-03-21 | パナソニック株式会社 | Encoder, decoder and encoding method |
| CN103888153A (en) * | 2014-03-13 | 2014-06-25 | 浙江大学城市学院 | Method and device for improving Turbo code MAP decoding performance |
| CN110557220B (en) * | 2018-05-30 | 2023-06-27 | 上海矽久微电子有限公司 | Physical layer channel coding and decoding method |
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