CN101119178B - Signal transmitting, receiving method and signal transmitting device - Google Patents
Signal transmitting, receiving method and signal transmitting device Download PDFInfo
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Abstract
The present invention relates to a signal transmitting and receiving method. A transmitting end encodes the data to be transmitted according to the nonregular coding rule. According to the given mapping rule, partial or all coding bits with important column right are orderly mapped to the position of a high signal-to-noise ratio. The mapped coding bits are then demodulated and transmitted to a wireless channel. The receiving end demodulates the received signal and obtains the demodulated encoding bits. When the signal is confirmed to need a demapping according to the serial number of received signal, the flexible information corresponding to the encoding bits before the mapping is obtained through a demapping according to the demapping rule corresponding to the mapping rule and the transmission data is obtained through decoding. The present invention also provides a signal transmitting and receiving device. When the method and installation of the present invention conducts the signal transmission, the encoding bit with greater importance is mapped to the position with a high transmission signal-to-noise ratio, thereby decreasing the effect to the signal transmission due to channel comedown and burst noise, obtaining the best signal transmission performance in the communication system of signal dropout, and obtaining more effective information on the information nodes.
Description
Technical field
The present invention relates to the communication technology, refer in particular to the transmission of a kind of signal sending, receiving method and signal, receiving system.
Background technology
In signal transmission technology, low-density check (Low Density Parity Check Code, LDPC) sign indicating number is after Turbo code, another focus in channel coding/decoding field, the LDPC encoding and decoding technique is subjected to using widely at wireless communication field, and along with development of Communication Technique has application prospect widely.
The LDPC sign indicating number is a kind of linear code based on sparse check matrix H, and one (N, K) the available check matrix H corresponding with it of binary LDPC sign indicating number is represented.Wherein, the H matrix is M * N and full rank, and corresponding LDPC code length is N, and check digit is M, and information bit is K=N-M, and code check is K/N=1-M/N.Binary vector C=(c1, c2 ..., cN), and if only if HC
T, be only a code word at=0 o'clock.The number of " 1 " is called capable weight in the every row of H matrix, and the number of " 1 " is called the row weight in every row.
Check matrix H can be constructed by bipartite graph, thereby the corresponding also available bipartite graph of LDPC sign indicating number is represented loe-density parity-check code bipartite graph as shown in Figure 1:
N node arranged below Fig. 1, and each node is represented a bit of code word, claims bit node or information node, corresponding row of check matrix H; M node arranged above, and each node is represented a checksum set (parity check equations), claims check-node, corresponding the delegation of H; Element Hmn=1 in the check matrix then represents to have fillet between the information node n and check-node m in the bipartite graph, and this edge can be described as the adjacent edge of two end nodes, and the node at adjacent edge two ends is called adjacent node; Each node adjacent edge number is called the number of degrees of this node.
According to the number of degrees of information node and check-node, the LDPC sign indicating number can be divided into canonical sign indicating number and non-canonical sign indicating number.In the canonical sign indicating number, the number of degrees between each information node and each check-node are identical; In the non-canonical sign indicating number, the number of degrees between the information node and between the check-node might be different.Therefore based on the LDPC sign indicating number of non-regular graph structure, the row weight of check matrix H will be no longer identical, and the row weight will be the value of a variation, and this is the main distinction of non-canonical LDPC sign indicating number and canonical LDPC sign indicating number.
The performance of non-canonical LDPC sign indicating number generally is better than canonical LDPC sign indicating number.From bipartite graph shown in Figure 1, the limit that all information nodes send should equate with the limit that all check-nodes receive.Concerning information node, spend and be the bigger the better.The information node degree is big more, and node obtains more information from adjacent check-node, so just can judge its right value more exactly; But concerning check-node, degree but is the smaller the better.The degree of check-node is more little, sends more effective information can for adjacent information node.In the LDPC sign indicating number of non-regular graph structure, information node with big number of degrees can obtain its right value soon, this information node just can be given the more correct probabilistic information of check-node like this, and these check-nodes can be given the information node more information of the little number of degrees, thereby generation rough wave effect, convergence rate is faster when making iterative decoding, thereby non-canonical LDPC sign indicating number just can have the performance that better obtains effective and correct information than canonical LDPC sign indicating number.What Fig. 1 represented is exactly a non-canonical LDPC sign indicating number.
In wireless communication system, because the influence of channel fading, burst noise etc., the signal to noise ratio of each transmission signals is normally different, in traditional communication system, do not consider the relation of LDPC code check matrix column weight, therefore in having the system of signal fadeout, do not have the effective and correct information of best acquisition with Signal-to-Noise.
Summary of the invention
The present invention proposes that a kind of signal sending, receiving method and signal send, receiving system, in order to solving in the wireless channel transmission, can not obtain the performance of information more accurately and effectively after causing the system signal transmission by the difference of signal to noise ratio.
The inventive method may further comprise the steps:
A, according to non-canonical coding rule coding data to be transmitted;
B, according to the mapping ruler of setting, in regular turn the big coded-bit of part or all of row weight is mapped on the high position of signal to noise ratio;
The coded-bit that obtains after C, the modulation mapping also sends to wireless channel.
In this method, mapping ruler described in the step B is specially according to being mapped to corresponding to the mapping table of the described mapping ruler coded-bit that each weight is big on the high bit of signal to noise ratio.
In this method, the modulation system of described step C is log2 (M) greater than 2 high-order modulating.
In this method, when transmitting terminal had a plurality of transmission branch, mapping ruler described in the step B was specially according to being mapped in the high transmission branch of signal to noise ratio corresponding to the mapping table of described mapping ruler at least one coded-bit that the row weight is high.
In this method, when transmitting terminal carries out data when retransferring, transmitting terminal is according to the response of receiving terminal, according to the corresponding re-transmission priority list of setting of re-transmission priority mapping rule, the big bit of row weight is mapped to the high bit of signal to noise ratio or sends in the branch modulation transmission in all or part of coded-bit corresponding check matrix that successively needs is retransferred.
In this method, also comprise in the described steps A coded-bit corresponding check matrix column weight is sorted; And the signal to noise ratio of wireless channel detected, and determine the step of each position noise ordering.
In this method, also comprise the signal to noise ratio that detects described wireless channel, more new settings and mapping ruler corresponding mapping table or with retransmitting the priority mapping rule step of corresponding re-transmission priority list.
In this method, also comprise according to the employed coding rule of the data of transmitting in the wireless channel more new settings and mapping ruler corresponding mapping table or with retransmitting the priority mapping rule step of corresponding re-transmission priority list.
In this method, also comprise according to the employed modulation system of the data of transmitting in the wireless channel more new settings and mapping ruler corresponding mapping table or with retransmitting the priority mapping rule step of corresponding re-transmission priority list.
The present invention also provides a kind of signal acceptance method, may further comprise the steps:
The signal that A ', demodulate reception arrive obtains the coded-bit of demodulation;
B ', when determining that according to the sequence number of received signal this signal demand separates when mapping, according to the mapping ruler of separating that corresponding codes bit column weight on the high position of the signal to noise ratio that sets is big described signal is separated mapping, obtain and shine upon before the corresponding soft information of coded-bit;
Information among C ', the decoding step B ' obtains the transmission data.
In this method, when the signal of described steps A ' middle reception was the multiple-limb signal, the multiple-limb coded-bit that the demodulation simultaneously of multiple-limb signal obtains was carried out multiple-limb coded-bit information and is merged, again execution in step B '.
In this method, when receiving re-transmitted signal, in the steps A ' coded-bit high specific of the re-transmitted signal of demodulation is merged, execution in step B ' again.
In this method, set or upgrade the described pairing mapping table of separating of mapping ruler of separating according to the pairing mapping table of the mapping ruler of transmitting terminal.
The invention provides a kind of sender unit, comprise coding unit, first memory cell, map unit and modulation sending unit, wherein:
Coding unit is used for the digital coding to transmitting, and forms non-canonical coded-bit;
First memory cell is used for the mapping table of the mapping ruler of storage representation row weight and signal to noise ratio, and described mapping ruler is specially according to being mapped to corresponding to the mapping table of the described mapping ruler coded-bit that each weight is big on the high bit of signal to noise ratio;
Map unit, the mapping table that is used for storing according to described first memory cell is mapped to the high position of signal to noise ratio with the coded-bit that described coding unit transmits;
Modulation sending unit is used for the coded-bit modulation after the described map unit mapping processing is sent.
Described modulation sending unit comprises a plurality of transmission branch unitss.
Described device also comprises:
Row weight sequencing unit is used to receive the coded-bit that described coding unit transmits, to being sent to described map unit after the coded-bit ordering that receives; And
Signal to noise ratio detects sequencing unit, is used for to the detection of wireless channel and by being sent to described map unit after the ordering of signal to noise ratio size.
Described device also comprises:
Second memory cell is used for the re-transmission priority list of the re-transmission priority mapping rule of storage representation row weight and signal to noise ratio;
Repetition/retransmission unit receives the coded-bit that described coding unit transmits, and carries out the coded-bit mapping according to the re-transmission priority list of described second cell stores, passes to described modulation sending unit.
Described device also comprises:
The mapping table updating block is used for according to the detection of wireless channel, perhaps upgrades mapping table in described first memory cell and the re-transmission priority list in described second memory cell according to the coding rule of the signal that transmits in the wireless channel and/or modulation system.
The present invention also proposes a kind of signal receiving device, and comprise the receiving demodulation unit, separate map unit, the 3rd memory cell, wherein:
The receiving demodulation unit is used for the signal demodulation to receiving, and obtains coded-bit;
The 3rd memory cell is used for the big mapping table of separating of separating mapping ruler of corresponding codes bit column weight on the high position of storage representation signal to noise ratio;
Separate map unit, be used for the coded-bit that described receiving demodulation unit obtains being reduced, obtain and shine upon the preceding corresponding soft information of coded-bit according to the mapping table of separating of described the 3rd cell stores;
Decoding unit is used for the described information decoding that map unit is reduced, the data of acquisition transmission of separating.
Described receiving demodulation unit comprises a plurality of reception branch unitss; And
The information merge cells, the coded-bit information of carrying out that the demodulation of a plurality of reception branch units is obtained merges, and sends the described map unit of separating to.
Also comprise the retransmission information merge cells, receive that the unit demodulation of described receiving demodulation obtains the re-transmission coded-bit, the coded-bit that retransmits is carried out sending the described map unit of separating to after high specific merges.
Described device also comprises:
Separate the mapping table updating block, be used for upgrading the mapping table of separating of described the 3rd memory cell according to the mapping table that sender unit upgrades.
Beneficial effect of the present invention is as follows:
The present invention is in the communication system of using non-canonical rule encoding (for example loe-density parity-check code), when carrying out the signal transmission, according to non-canonical coding rule, the coded-bit that importance is higher (the high row of weight in the check code) is mapped on the high position of transmission signal to noise ratio, minimizing is by the influence to the signal transmission such as channel fading, burst noise, can have and obtain best signal transmission performance in the communication system of signal fadeout, on information node, obtain how effective information.It is inhomogeneous that technical scheme of the present invention especially can be applied to coded-bit importance, and in the also uneven communication system of transmission signals reliability.
Description of drawings
Fig. 1 is existing loe-density parity-check code bipartite graph;
Fig. 2 is a sending method flow chart of the present invention;
Fig. 3 is a method of reseptance flow chart of the present invention;
Fig. 4 A is the 16QAM modulation constellation;
Fig. 4 B is the 64QAM modulation constellation;
Fig. 5 is the flow chart of the embodiment 1 of signal sending and receiving methods of the present invention;
Fig. 6 is the flow chart of the embodiment 2 of signal sending and receiving methods of the present invention;
Fig. 7 is the flow chart of the embodiment 3 of signal sending and receiving methods of the present invention;
Fig. 8 is the structural representation of the embodiment 1 of sender unit of the present invention;
Fig. 9 is the structural representation of the embodiment 2 of sender unit of the present invention;
Figure 10 is the structural representation of the embodiment 3 of sender unit of the present invention;
Figure 11 is the structural representation of the embodiment 1 of signal receiving device of the present invention;
Figure 12 is the structural representation of the embodiment 2 of signal receiving device of the present invention;
Figure 13 is the structural representation of the embodiment 3 of signal receiving device of the present invention.
Figure 14 adds the simulation performance comparison diagram of map unit front and back for the present invention.
Embodiment
The present invention proposes a kind of signal method of sending and receiving, and its principle is in signal sends and receives, and considers the relation between coded-bit corresponding check matrix column weight and the signal to noise ratio.When signal sends, the transmission data are carried out the LDPC coding, the non-canonical coded-bit that obtains, in regular turn the big coded-bit of row weight in the described coded-bit corresponding check matrix is mapped on the high position of signal to noise ratio and modulates transmission again, make signal train weight big (information node that the number of degrees are big) obtain bigger signal to noise ratio like this, improve the code element performance gain in the process of transmitting; Simultaneously can improve decoding performance to a great extent, reduce the error probability of decoding, strengthen the signal transmission performance of communication system at the method for reseptance corresponding with sending method of the present invention.
As shown in Figure 2, be sending method flow chart of the present invention, the present invention proposes signaling method and may further comprise the steps:
201, according to non-canonical coding rule coding data to be transmitted;
202, according to the mapping ruler of setting, in regular turn that part or all of weight is big coded-bit is mapped on the high position of signal to noise ratio;
203, the coded-bit that obtains after the modulation mapping and send to wireless channel.
As shown in Figure 3, be method of reseptance flow chart of the present invention, this signal acceptance method can be corresponding with described signaling method, and this signal acceptance method may further comprise the steps:
301, the signal that arrives of demodulate reception;
302, when determining that according to the sequence number of received signal this signal demand is separated mapping, separate mapping according to the mapping ruler of separating that the coded-bit row weight of the signal to noise ratio high position that sets is big, reduction obtains and shines upon the preceding corresponding soft information of coded-bit; In this step, described to separate the mapping ruler that adopts in mapping ruler and the sending method corresponding, in the present embodiment, and described mapping ruler and separate mapping ruler and adopt mapping table to represent;
303, the information of decoding and obtaining obtains the transmission data.
Signal of the present invention receives and sending method can be used for the high order modulation communication system, also can be used in multiple-limb transmission system and HARQ (Hybrid Automatic Repeat reQuest; Mix automatic repeat requests) in the transmission system, below adopt three kinds of embodiment to carry out specific description to realizing method of the present invention.
Embodiment 1
In the present embodiment, with reference to figure 5, signal method of sending and receiving of the present invention is described with the high order modulation communication system:
In the present embodiment, when transmitting terminal carries out the signal transmission,, at first data to be transmitted is carried out non-canonical coding according to step 501; In order under the uneven situation of signal to noise ratio on the wireless channel of signal transmission, to send more effective information, minimizing is by channel fading, burst noises etc. are to the influence of signal transmission, in step 502, in regular turn according to LDPC check matrix column weight size, coded-bit to the LDCP coding shines upon according to the mapping ruler correspondence mappings table with setting, and the mapping ruler that sets in the present embodiment is according to mapping table the corresponding sign indicating number bit of row (also being the big information node of the number of degrees in the bipartite graph) that weight is big in the LDPC sign indicating number corresponding check matrix to be mapped on the high position of signal to noise ratio; Execution in step 503 again, and the coded-bit that obtains after the modulation mapping also sends to wireless channel.
For method of reseptance, be according to the contrary processing procedure corresponding, the at first signal that arrives according to step 504 demodulate reception with transmitting terminal; Execution in step 505, the signal that demodulation obtains is separated mapping according to the big mapping ruler of separating of coded-bit row weight of the signal to noise ratio high position of setting, reduction obtain with shine upon before the corresponding soft information of coded-bit, wherein this is separated one of mapping ruler correspondence and separates mapping table and represent; Execution in step 506, the soft information that decoding obtains obtains the transmission data.Adopt the described signal acceptance method of present embodiment, there is the information node of the big number of degrees can obtain right value quickly, and then can give the more correct probabilistic information of check-node, and thus can be so that iterative decoding convergence is faster, thus the decoding performance of LDPC improved.
In the present embodiment, in step 501, after the digital coding to the needs transmission, also comprise, and the signal to noise ratio of wireless channel is detected according to the coded-bit corresponding check matrix column weight size ordering that obtains, and the step of definite noise ordering; In this step, to the sort size of row weight of every row of obtaining a check matrix successively of the coded-bit corresponding check matrix column weight that obtains; Signal to noise ratio sorts respectively on simultaneously also can be to wireless channel in this step, obtain the signal to noise ratio of each position in the wireless channel, the ordering of this signal to noise ratio can obtain according to the analysis to constellation mapping figure, perhaps also can obtain according to the parameter of wireless channel.
In step 502, when shining upon, can successively whole coded-bits be mapped on the bit that signal to noise ratio is high in the signal channel one by one according to row weight size according to the mapping ruler of setting; Also the size of part coded-bit according to the row weight can be mapped on the position that signal to noise ratio is high in the signal channel, just may the bit that the part rows weight is big in the coded-bit be mapped to earlier on the high position of signal to noise ratio according to the ordering of row weight, when may exist in the coded-bit that obtains several row weights identical and for ordering in maximum bit, the row weight of other bits is all identical, just need not to shine upon one by one this moment, on the high several position of the noise ordering of mapping that only need the row weight is big, other be mapped on the remaining signal to noise ratio position.Execution in step 503 again, and the signal of modulation is modulated and sent to the coded-bit that obtains after the mapping to wireless channel.
The application system of method described in the present embodiment is: the transmission system of the M-QAM of use log2 (M)＞2 and the high order modulation of M-PSK, as 16QAM, 64QAM etc., after the demodulation of the coded-bit of each transmission through modulation, Channel Transmission and the receiving terminal calculating maximum likelihood ratio of transmitting terminal, signal to noise ratio on each bit is inequality, with reference to 16QAM shown in figure 4A and Fig. 4 B and 64QAM constellation mapping figure this method is described:
In the 16QAM modulation, 4 bit b3b2b1b0 are mapped to a qam symbol (constellation point), and in signals transmission, after the QAM demodulation, the signal to noise ratio that b3 and b1 are two is higher, and the signal to noise ratio that b2 and b0 are two is lower; In the 64QAM modulation, 6 bit b5b4b3b2b1b0 are mapped to a qam symbol, and by demodulation, b5 and b2 signal to noise ratio are the highest, and b4 and b1 take second place, and b3 and b0 signal to noise ratio are minimum.
In the sending method in the present embodiment, because the LDPC that adopts is encoded to non-regular LDPC sign indicating number, the weight that is each row in the check matrix is inequality, the canonical sign indicating number that this class sign indicating number is identical with respect to each row weight, usually has stronger error-correcting performance, when transmitting terminal shines upon, at first LDPC sign indicating number corresponding check matrix column weight is carried out the height ordering, continuation is referring to the content of Fig. 4 A and Fig. 4 B, in the system that adopts the 16QAM modulation, in coded-bit when mapping, will be mapped on b3 and the b1 with the big corresponding coded-bit of row of weight, will be mapped on b2 and the b0 with the corresponding coded-bit of the row of little weight; In the system that adopts the 16QAM modulation, when bit shines upon, to be mapped on b3 and the b1 with the big corresponding coded-bit of row of weight, will be mapped on b4 and the b1, will be mapped on b3 and the b0 with the little corresponding coded-bit of row of weight with the weight size corresponding coded-bit of row placed in the middle.
Lifting an object lesson below describes the mapping process in the step 202.In this example, adopt the non-canonical LDPC sign indicating number and the 16QAM modulation system of 1/2 code check.
Be the LDPC code check matrix H of one 1/2 code check below:
0，1，1，0，0，0，0，0，1，1，0，0，1，1，0，0，0，0，0，0，0，0，0，0
0，1，0，0，0，1，1，1，0，0，0，1，0，1，1，0，0，0，0，0，0，0，0，0
0，0，0，1，1，1，0，1，0，0，0，1，0，0，1，1，0，0，0，0，0，0，0，0
1，0，1，0，0，0，0，0，1，1，0，0，0，0，0，1，1，0，0，0，0，0，0，0
0，0，1，0，0，0，1，0，0，1，1，0，0，0，0，0，1，1，0，0，0，0，0，0
0，0，0，0，1，1，0，1，0，0，0，1，1，0，0，0，0，1，1，0，0，0，0，0
0，0，1，1，0，0，0，0，0，1，1，0，0，0，0，0，0，0，1，1，0，0，0，0
0，1，1，0，0，0，1，0，0，1，0，0，0，0，0，0，0，0，0，1，1，0，0，0
1，0，0，0，1，1，0，1，0，0，0，1，0，0，0，0，0，0，0，0，1，1，0，0
0，0，0，0，0，1，0，1，0，0，1，1，0，0，0，0，0，0，0，0，0，1，1，0
0，0，1，1，0，0，0，0，1，1，0，0，0，0，0，0，0，0，0，0，0，0，1，1
1，0，0，0，0，1，0，1，0，0，0，1，1，0，0，0，0，0，0，0，0，0，0，1
This matrix has 24 row, the code word that produces by its be C=(c1, c2 ..., c24),, HC is arranged according to the verification rule
T=0.
The row weight of each row of matrix and the mapping table of corresponding codes bit are as shown in the table:
Table 1
| The row sequence number | The row weight | Corresponding coded-bit |
| 1 | 3 | c1 |
| 2 | 3 | |
| 3 | 6 | |
| 4 | 3 | c4 |
| The row sequence number | The row weight | Corresponding coded- |
| 5 | 3 | c5 |
| 6 | 6 | c6 |
| 7 | 3 | c7 |
| 8 | 6 | c8 |
| 9 | 3 | |
| 10 | 6 | |
| 11 | 3 | c11 |
| 12 | 6 | c12 |
| 13 | 3 | c13 |
| 14 | 2 | c14 |
| 15 | 2 | c15 |
| 16 | 2 | c16 |
| 17 | 2 | c17 |
| 18 | 2 | c18 |
| 19 | 2 | c19 |
| 20 | 2 | c20 |
| 21 | 2 | c21 |
| 22 | 2 | c22 |
| 23 | 2 | c23 |
| 24 | 2 | c24 |
According to table 1 as can be known, 14～24 row weights are less in the matrix, be 2, according in the mapping ruler of setting and according in the above-mentioned mapping table to the ordering of the row weight of coded-bit, the coded-bit that 1～14 row weight is big is mapped on the high position of signal to noise ratio successively, 14～24 row corresponding codes bits all are mapped on the less position of signal to noise ratio, for example, in the mapping of 16QAM modulation constellation, per 4 bits (b3b2b1b0) are mapped to a constellation point, wherein b3 and b1 transmission signal to noise ratio is higher, and b2 and b0 are lower.Therefore, should will be mapped on b2 and the b0 with less corresponding 12 of row weight in 24 coded-bits, will be mapped on b3 and the b1 with big corresponding 12 coded-bits of row weight.
In the present invention, because wireless channel environment changes, signal to noise ratio also can change according to the variation of factors such as time, coding rule, modulation system, so the present invention comprises also that the signal to noise ratio of described channel detects or come the mapping table set or separate mapping table and make updating steps according to the coding rule that transmits data in the wireless channel or modulation system, and then in the assurance transmission system, the information node that the row weight is big can obtain more effective information, thereby improves the signal transmission performance of wireless communication system.In the present embodiment, mapping table just can be adjusted according to the employed coding rule of signal that transmits in the variation of above-mentioned signal to noise ratio, the wireless channel and the factors such as modulation system of use, for example: c4 is changed with c15, c6 changes with c17, c8 changes with c19, c10 changes with c21, and c12 is with the c23 transposing, and all the other bit positions are constant.In carrying out mapping steps, the mapping that can encode according to the mapping table after upgrading.
After signal sending end LDPC coding, with 24 bits is one group, according to the mapping table of setting coded-bit is carried out bit mapping (concrete mapping process can with reference to foregoing), coded-bit after the mapping is carried out constellation mapping and the modulation of 16QAM, like this through after the constellation mapping, the corresponding coded-bit of row that all and weight are bigger all is in odd positions, promptly in constellation mapping on the position corresponding to b3 and b1; The less corresponding coded-bit of row of all and weight all is in the even number position, promptly on the position corresponding to b2 and b0, makes the big coded-bit of weight can carry more information in constellation mapping.
Behind the signal of receiving terminal by the wireless channel transmission, according to method of reseptance of the present invention, at first the signal according to step 504 pair reception carries out demodulation, adopts the QAM demodulation in the present embodiment; Again according to the description of step 505, according to separating mapping with the pairing mapping table of separating of separating mapping ruler of mapping table of expression mapping ruler, obtain and shine upon before the corresponding soft information of coded-bit, the processing of separating mapping is the inverse process that mapping is handled, corresponding with above-mentioned sending method, it is one group with 24 bits equally, separate mapping according to the mapping table of setting of separating of separating the mapping ruler correspondence, signal after the demodulation soon reverts to the order before the transmit leg mapping, and wherein this separates mapping table setting or renewal that mapping table is set according to transmitting terminal; Execution in step 506 is carried out the LDPC decoding to separating the coded-bit that obtains after the mapping, and receiving terminal obtains the data by the transmission system transmission.The transmission of relevant present embodiment and reception flow process are referring to Fig. 5.
In the present invention, owing to have the identical row of row weight in the check matrix, therefore concrete mapping mode may not be unique during the signal transmission.Such as, c4 can be changed with c15, the rule that c6 changes with c17 changes c4 into and changes with c17, and c6 is with c15 transposing or the like, and the adjustment of this mapping relations all is to adopt the mode of prior art to realize.
In addition, in the bipartite graph of LDPC sign indicating number, the size of check-node degree is also influential to the performance of coding.Therefore in mapping process, can only shine upon according to the size of the row weight rule corresponding with the signal to noise ratio height to the part coded-bit, can another part then not shone upon, might obtain more performance like this, such as signal transmission performance in the raising system simultaneously, and reduce signal complexity for transmitting in the system.
The method of present embodiment is equally applicable to have pilosity and gives/communication systems that receive more in, be applicable to that also in the system that needs to retransmit, relevant principle and step are identical, no longer give unnecessary details at this.
Embodiment 2
In the present embodiment, with reference to figure 6, signal method of sending and receiving of the present invention is described with the multiple-limb transmission system:
For the multiple-limb transmission system, carrying out signal when sending, at first according to step 601, according to non-canonical coding rule to the transmission digital coding; Execution in step 602, to non-positive LDCP coded-bit according to shining upon with the mapping ruler corresponding mapping table of setting, the mapping ruler that sets in the present embodiment is meant: the big row of row weight are mapped in the higher transmission branch of transmission signal to noise ratio in the coded-bit that LDPC coding is obtained, and the less coded-bit of row weight is mapped in the lower branch of transmission signal to noise ratio in the coded-bit that the LDPC coding is obtained; Execution in step 603 again, to being sent in the wireless channel after the modulation of the coded-bit after the mapping.
In the multiple-limb transmission system, the method for reseptance that receiving terminal is carried out is and the corresponding contrary processing procedure of the sending method of transmitting terminal: at first according to described step 604, receive the also signal of demodulate reception; In the described system of present embodiment, can receive the signal that wireless channel transmits by a plurality of reception branch after, receive the signal demodulation of branch at each, and each is received the coded-bit that branch's demodulation obtains merge receiving; Execution in step 605 in the present embodiment, is to separate mapping according to the big mapping ruler of separating of weight of coded-bit in the high reception branch of the signal to noise ratio of setting, and obtains to have the pairing soft information of coded-bit of the order before transmit leg does not shine upon; According to step 606, the soft information of this acquisition is carried out the data that LDPC decoding back obtains transmission.Adopt the described method of present embodiment, make the information node of the big number of degrees can obtain right value quickly, and then can give the more correct probabilistic information of check-node, thus can be so that the iterative decoding convergence is faster, thereby improve the decoding performance of LDPC, read and transmit data accurately.
In the present embodiment, transmitting terminal has pilosity and send branch, and receiving terminal has the branches that receive more, and it may be to send in different shunt that signal spreads out of in the process, and common multiple-limb system has following several:
Multi-frequency branch: signal sends on different frequencies;
Many time branch: signal sent on the different time;
Many antenna branch: signal sends on different antennas;
Many yards branches: signal sends on for example different CDMA spreading codes;
Multi-site branch: signal sends on different websites.
Multiple-limb in the communication system also has other forms, and its principle is identical with above-mentioned multiple-limb system, no longer gives unnecessary details at this.The described multiple-limb of present embodiment system can be one or more combinations of above-mentioned branch system.
Adopting the check matrix of being enumerated among the embodiment 1 is that example describes the mapping step in the method for present embodiment, and the mapping table that present embodiment adopts is as shown in table 2:
Table 2
| Sequence number a | Press the row sequence number b of row weight size ordering | With b corresponding codes bit | The ordering of signal to noise ratio branch |
| 1 | 3 | c3 | f1 | |
| 2 | 6 | | f2 | |
| 3 | 8 | c8 | f3 |
| 1 | 3 | | f1 | |
| 4 | 10 | | f4 | |
| 5 | 12 | c12 | f5 | |
| 6 | 1 | c1 | f6 | |
| 7 | 2 | c2 | f7 | |
| 8 | 4 | c4 | f8 | |
| 9 | 5 | | f9 | |
| 10 | 7 | | f10 | |
| 11 | 9 | c9 | f11 | |
| 12 | 11 | c11 | f12 | |
| 13 | 13 | c13 | f13 | |
| 14 | 14 | c14 | f14 | |
| 15 | 15 | c15 | f15 | |
| 16 | 16 | c16 | f16 | |
| 17 | 17 | c17 | f17 | |
| 18 | 18 | c18 | f18 | |
| 19 | 19 | c19 | f19 | |
| 20 | 20 | c20 | f20 | |
| 21 | 21 | c21 | f21 | |
| 22 | 22 | c22 | f22 | |
| 23 | 23 | c23 | f23 | |
| 24 | 24 | c24 | f24 |
Supposition transmission number of branches is identical with coded block size in the table 2, also is 24.Each branch is sorted according to the transmission signal to noise ratio, and for simplicity, the transmission signal to noise ratio size of supposing each branch (1～24) is for from high to low, and promptly branch's 1 signal to noise ratio is the highest, and branch's 2 signal to noise ratios are taken second place ..., branch's 24 signal to noise ratios are minimum.Carrying out coded-bit in the mapping of branch like this, be mapped in the branch 1 with the row corresponding codes bit c2 of check matrix weight maximum, c6 is mapped in the branch 2, and the rest may be inferred, is mapped in the minimum branch of signal to noise ratio 24 with the row corresponding codes bit c24 of check matrix weight minimum.
In the present embodiment, owing in the check matrix the identical row of row weight are arranged, and each branch's signal to noise ratio may be identical, therefore concrete mapping ruler may not be unique.Such as c23 being mapped in the branch 24, c24 is mapped in the branch 23, or the like.The adjustment of these mapping rulers can adopt existing mode to realize.
Based on foregoing description, signal of the present invention receives the advantage that not only has the signal transmission of multiple-limb system with sending method, can also improve signal transmission performance, makes the big information node of row weight can obtain more effective information.
In above-mentioned present embodiment 1 and embodiment 2, also comprise according to the signal to noise ratio of described wireless channel and upgrade the mapping table of correspondence mappings rule or the step of separating mapping table of separating mapping ruler, specifically comprise: wireless channel is detected, according to the result who detects, revise mapping table or separate the ordering of the signal to noise ratio in the mapping table, reach more the mapping table of new settings or the purpose of separating mapping table; Obtain the ordering of signal to noise ratio and revise mapping table or separate mapping table according to the transmission employed coding rule of data or modulation system in the wireless channel, reach more the mapping table of new settings or the purpose of separating mapping table; Revise mapping table or separate mapping table according to the ordering of the row weight of data to be transmitted, also can revise mapping table or separate mapping table, the renewal of finishing mapping table or separating mapping table according to the row weight of data to be transmitted and the conversion of signal to noise ratio simultaneously.And then in the assurance transmission system, the information node that the row weight is big can obtain more effective information, thereby improves the signal transmission performance of wireless communication system.
Equally, the method for present embodiment also is applicable in the high order modulation communication system, is applicable to that also in the system that needs to retransmit, relevant principle is identical, no longer gives unnecessary details at this.
In the present embodiment, with reference to figure 7, signal method of sending and receiving of the present invention is described with HARQ communication system with repetition or re-transmission:
When carrying out the signal transmission in the wireless communication system, method according to the foregoing description 1 and embodiment 2 is carried out the transmission of signal, if channel transmission rate quantitatively has redundancy with respect to the signal that will transmit, a part of coded-bit need be repeated to transmit, just carry out rate-matched, repeat to transmit according to the flow process of Fig. 7.In the HARQ system, if receiving terminal decoding failure may need some or all of coded-bit is retransmitted.In the system that repetition or re-transmission are arranged, at receiving terminal the signal that repeats or retransmit is merged, just can obtain correct transmission data.
Based on foregoing description, adopt method of the present invention, when needs carry out the signal repetition or retransmit, at first carry out the non-canonical coding of LDPC according to the step 701 pair data that need to retransmit; Execution in step 702 is according to the re-transmission priority list in the re-transmission priority mapping rule of the big or small and setting of the coded-bit corresponding check matrix column weight of LDPC coding, wherein this re-transmission priority mapping rule is meant that the coded-bit that the row weight is big in the coded-bit that will repeat to transmit is mapped to preferentially transmission on the high position of signal to noise ratio, and then transmits the relatively little coded-bit of row weight in the coded-bit; Execution in step 703, the coded-bit after the modulation mapping sends, and in the present embodiment, when the coded-bit of mapping is modulated, can adopt modulation scheme arbitrarily, comprises MPSK, QAM etc.
At signal receiving end, the method that its signal that adopts receives can be the contrary processing procedure of signaling method, at first according to step 704, after receiving terminal receives the signal that repeats to transmit, carry out demodulation to received signal, coded-bit before repetition or the coded-bit that retransmits and repetition or the re-transmission is carried out high specific merge, can obtain the merging gain of maximum; Execution in step 705 is separated mapping according to separating the mapping table information afterwards that is combined; Execution in step 706 afterwards, and the soft information of separating mapping is carried out the LDPC decoding, obtain the data that transmitting terminal transmits.
Below still with the matrix among the embodiment 1 present embodiment is described, the correspondence that adopts in the present embodiment retransmits the content that the re-transmission priority list of priority mapping rule can reference table 3, and this table sorts according to size according to weight to being listed as.Embodiment 1 described check matrix, its ranking results is as follows:
Table 3
| Sequence number a | Press the row sequence number b of row weight size ordering | With b corresponding codes bit |
| 1 | 3 | c3 |
| 2 | 6 | |
| 3 | 8 | |
| 4 | 10 | |
| 5 | 12 | c12 |
| 6 | 1 | c1 |
| 7 | 2 | c2 |
| 8 | 4 | c4 |
| 9 | 5 | |
| 10 | 7 | |
| 11 | 9 | c9 |
| 12 | 11 | c11 |
| 13 | 13 | c13 |
| 14 | 14 | c14 |
| 15 | 15 | c15 |
| 16 | 16 | c16 |
| 6 | 1 | c1 |
| 17 | 17 | c17 |
| 18 | 18 | c18 |
| 19 | 19 | c19 |
| 20 | 20 | c20 |
| 21 | 21 | c21 |
| 22 | 22 | c22 |
| 23 | 23 | c23 |
| 24 | 24 | c24 |
Under the situation that repetition or re-transmission are arranged, the sequence number according to table repeats the coded-bit on the left side in the transmission table earlier, as c3, and c6, c8....
Owing in the check matrix the identical row of column weight are arranged, so the position of each coded-bit may not be unique in the priority list.Position such as c1 and c2 can exchange, and c23 can exchange or the like with the position of c24, can adopt the mode of prior art to realize for retransmitting resetting of priority list.
In addition, repeat or retransmission processes in, can get the whole of table and shine upon, also can only get a part wherein and abandon another part.In last table, can only get sequence number a and be 1～12 part, this part corresponding row weight is higher, might make system obtain more performance like this, perhaps can improve performance and reduce system complexity simultaneously.
In the system that repetition or re-transmission are arranged, according to LDPC check matrix column weight, preferentially repeat to send or re-transmission and the bigger corresponding coded-bit of row of weight, after merging, receiving terminal decodes again, make system can obtain better signal transmission performance, the method for present embodiment also can be applicable in enforcement 1 and the embodiment 2 described communication systems.In the present embodiment, also can adopt the update method priority list of new settings more in the foregoing description.
In sum, in using the system of high order modulation, the mapping of the row weight of different signal to noise ratios and LDPC code check matrix is combined; In the multiple-limb transmission system, the mapping of different branches being transmitted the row weight of signal to noise ratio and LDPC code check matrix combines; Perhaps in the system that repeats to send or retransmit is arranged, consider the influence of the row weight of LDPC code check matrix in repetition or retransmission processes, and then can improve decoding performance, reduce the error probability of decoding in same condition (average signal-to-noise ratio) down.Figure 14 is a simulation performance comparison diagram before and after system's adding map unit of using the nothing repetition of non-canonical LDPC sign indicating number (the maximum column weight is 6, and minimum row weight is 2) and 16QAM modulation or retransmitting.By more as can be seen, before modulation, add mapping step after, the performance that is obtained has certain gain.
The present invention also provides a kind of sender unit, as shown in Figure 8, this sender unit comprises the digital coding that is used for transmitting, form the mapping table of the coding unit of non-canonical coded-bit, the row weight that is used for the storage representation coded-bit and signal to noise ratio mapping ruler first memory cell, be used for the mapping table stored according to first memory cell coded-bit that described coding unit transmits be mapped to the high locational map unit of signal to noise ratio, and be used for wireless channel was modulated and be sent to the coded-bit after the mapping modulation sending unit.
In the present embodiment, this device also comprises: row weight sequencing unit is used to receive the coded-bit that described coding unit transmits, to being sent to described map unit after the coded-bit ordering that receives; And signal to noise ratio detection sequencing unit, be used for to the detection of wireless channel and by being sent to described map unit after the ordering of signal to noise ratio size.
Sender unit of the present invention can be used for various wireless communication systems, when signal sends, to transmit data by coding unit and carry out non-canonical coding (as adopting the LDPC coding), described map unit receives this coded-bit, call the mapping table of storing in first memory cell, in the present invention, the mapping ruler of this mapping table correspondence is that the big bit of corresponding check matrix column weight in the coded-bit is mapped on the high bit of signal to noise ratio, by modulation sending unit the mapped coding bit modulation is sent to wireless channel then.The operation principle of relevant this sender unit and the course of work can be referring to embodiment 1 described contents, so do not repeat them here.
Sender unit of the present invention also can be used for the multiple-limb transmission system, as shown in Figure 9, in this transmission system, the described modulation sending unit of this sender unit comprises a plurality of transmission branch unitss, and wherein a plurality of transmission branch unitss can be one or more in frequency offset, time diversity phenomenon, antenna branch, sign indicating number branch, the website branch units.
The wireless communication system that also can be used for having functions of retransmission at device of the present invention, as shown in figure 10, this device also comprises under above-mentioned formation: second memory cell of re-transmission priority list that is used for the re-transmission priority mapping rule of storage representation row weight and signal to noise ratio; And repetition/retransmission unit, the coded-bit that this repetition/retransmission unit received code unit transmits carries out the coded-bit mapping according to the re-transmission priority list of second cell stores, the signal that retransmits is passed to described modulation sending unit send.
Device of the present invention can also comprise row weight sequencing unit, and this row weight sequencing unit is used for the coded-bit that the received code unit transmits, to being sent to described map unit after the coded-bit size ordering that receives; And signal to noise ratio detection sequencing unit, be used for to the detection of wireless channel and by being sent to described map unit after the ordering of signal to noise ratio size.
Because the situation of wireless channel changes, change influence on signal-to-noise ratio (SNR) in order to conform, described device also comprises: the mapping table updating block, be used for according to detection wireless channel, or upgrade mapping table in described first memory cell and the re-transmission priority list in described second memory cell according to the modulation system of the coding rule of the signal that transmits in the wireless channel and/or use, specifically in the present embodiment, can be arranged on the mapping table in the memory cell according to the modifications of signal to noise ratio in the wireless transmission environment and retransmit priority list, for example, store this mapping ruler in form that can mapping table, after signal to noise ratio changes, can revise the mapping table of storage according to the signal to noise ratio that changes, mapping ruler can be accessed upgrade in time, guarantee effective transmission of signal.
The present invention provides a kind of signal receiving device simultaneously, and comprise the receiving demodulation unit, separate map unit, the 3rd memory cell, wherein:
The receiving demodulation unit is used for the signal demodulation to receiving, and obtains coded-bit; The 3rd memory cell is used for the mapping table of separating of separating mapping ruler of storage representation row weight and signal to noise ratio; Separate map unit, be used for the coded-bit that described receiving demodulation unit obtains being reduced, obtain and shine upon the preceding corresponding soft information of coded-bit according to the mapping table of separating of the 3rd cell stores;
Decoding unit is used for obtaining the transmission data to separating the coded-bit decoding of map unit reduction.
Corresponding to above-mentioned sender unit shown in Figure 8, after this receiving system receives the signal of transmission, by the demodulation to received signal of receiving demodulation unit, obtain coded-bit, and determine that according to the sequence number of these coded-bits the signal demand that receives separates mapping, the map unit of separating of receiving terminal is separated mapping table to the mapping of encoding ratio particular solution according to what set in the 3rd memory cell, again by obtaining the transmission data after the decoding unit decodes.In device of the present invention, the mapping ruler of setting in mapping ruler and the dispensing device of separating of setting is reverse each other process.The formation of relevant this signal receiving device is with reference to Figure 11.
Corresponding to the described sender unit of Fig. 9, the receiving demodulation unit of this signal receiving device comprises a plurality of reception branch unitss, and a plurality of reception branch unitss are one or several in frequency offset, time diversity phenomenon, antenna branch, sign indicating number branch, the website branch.This signal receiving device also comprises the information merge cells, and the coded-bit information of carrying out that the demodulation of a plurality of reception branch units is obtained merges, and sends the described map unit of separating to, and the formation of relevant this signal receiving device is with reference to Figure 12.
Corresponding to the described sender unit of Figure 10, this signal receiving device also comprises the retransmission information merge cells, receive the re-transmission coded-bit that the unit demodulation of described receiving demodulation obtains, the coded-bit that retransmits carried out sending to after high specific merges separate map unit, separate map unit and separate the soft information of shining upon before obtaining shining upon, this information of decoding again obtains transmitting data, and the principle of retransmission technique can no longer be given unnecessary details at this referring to the content of prior art.The formation of relevant this signal receiving device is with reference to Figure 13.
In signal receiving device of the present invention, also comprise: separate the mapping table updating block, be used for more new explanation mapping table of the mapping table that upgrades according to sender unit.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (21)
1. a signaling method is characterized in that, may further comprise the steps:
A, according to non-canonical coding rule coding data to be transmitted;
B, according to the mapping ruler of setting, in regular turn the big coded-bit of part or all of row weight is mapped on the high position of signal to noise ratio;
The coded-bit that obtains after C, the modulation mapping also sends to wireless channel;
Mapping ruler described in the step B is specially according to being mapped to corresponding to the mapping table of the described mapping ruler coded-bit that each weight is big on the high bit of signal to noise ratio.
2. method according to claim 1 is characterized in that, the modulation system of described step C is log2 (M) greater than 2 high-order modulating.
3. method according to claim 1, it is characterized in that, when transmitting terminal had a plurality of transmission branch, mapping ruler described in the step B was specially according to being mapped in the high transmission branch of signal to noise ratio corresponding to the mapping table of described mapping ruler at least one coded-bit that the row weight is high.
4. according to claim 1 or 3 described methods, it is characterized in that, when transmitting terminal carries out data when retransferring, transmitting terminal is according to the response of receiving terminal, according to the corresponding re-transmission priority list of setting of re-transmission priority mapping rule, the big bit of row weight is mapped to the high bit of signal to noise ratio or sends in the branch modulation transmission in all or part of coded-bit corresponding check matrix that successively needs is retransferred.
5. according to claim 1 or 3 described methods, it is characterized in that, also comprise in the described steps A coded-bit corresponding check matrix column weight is sorted; And the signal to noise ratio of wireless channel detected, and determine the step of each position noise ordering.
6. method according to claim 4 is characterized in that, also comprises the signal to noise ratio that detects described wireless channel, more new settings and mapping ruler corresponding mapping table or with retransmitting the priority mapping rule step of corresponding re-transmission priority list.
7. method according to claim 4, it is characterized in that, also comprise according to the employed coding rule of the data of transmitting in the wireless channel more new settings and mapping ruler corresponding mapping table or with retransmitting the priority mapping rule step of corresponding re-transmission priority list.
8. method according to claim 4, it is characterized in that, also comprise according to the employed modulation system of the data of transmitting in the wireless channel more new settings and mapping ruler corresponding mapping table or with retransmitting the priority mapping rule step of corresponding re-transmission priority list.
9. a signal acceptance method is characterized in that, may further comprise the steps:
The signal that A ', demodulate reception arrive obtains the coded-bit of demodulation;
B ', when determining that according to the sequence number of received signal this signal demand separates when mapping, according to the mapping ruler of separating that corresponding codes bit column weight on the high position of the signal to noise ratio that sets is big described signal is separated mapping, obtain and shine upon before the corresponding soft information of coded-bit;
Information among C ', the decoding step B ' obtains the transmission data.
10. method according to claim 9 is characterized in that, when the signal of described steps A ' middle reception was the multiple-limb signal, the multiple-limb coded-bit that the demodulation simultaneously of multiple-limb signal obtains was carried out multiple-limb coded-bit information and merged, again execution in step B '.
11. method according to claim 9 is characterized in that, when receiving re-transmitted signal, and in the steps A ' coded-bit high specific of the re-transmitted signal of demodulation is merged, execution in step B ' again.
12. according to claim 9 or 10 or 11 described methods, it is characterized in that, set or upgrade the described pairing mapping table of separating of mapping ruler of separating according to the pairing mapping table of the mapping ruler of transmitting terminal.
13. a sender unit is characterized in that, comprises coding unit, first memory cell, map unit and modulation sending unit, wherein:
Coding unit is used for the digital coding to transmitting, and forms non-canonical coded-bit;
First memory cell is used for the mapping table of the mapping ruler of storage representation row weight and signal to noise ratio, and described mapping ruler is specially according to being mapped to corresponding to the mapping table of the described mapping ruler coded-bit that each weight is big on the high bit of signal to noise ratio;
Map unit, the mapping table that is used for storing according to described first memory cell is mapped to the high position of signal to noise ratio with the coded-bit that described coding unit transmits;
Modulation sending unit is used for the coded-bit modulation after the described map unit mapping processing is sent.
14. device according to claim 13 is characterized in that, described modulation sending unit comprises a plurality of transmission branch unitss.
15., it is characterized in that described device also comprises according to claim 13 or 14 described devices:
Row weight sequencing unit is used to receive the coded-bit that described coding unit transmits, to being sent to described map unit after the coded-bit ordering that receives; And
Signal to noise ratio detects sequencing unit, is used for to the detection of wireless channel and by being sent to described map unit after the ordering of signal to noise ratio size.
16., it is characterized in that described device also comprises according to claim 13 or 14 described devices:
Second memory cell is used for the re-transmission priority list of the re-transmission priority mapping rule of storage representation row weight and signal to noise ratio;
Repetition/retransmission unit receives the coded-bit that described coding unit transmits, and carries out the coded-bit mapping according to the re-transmission priority list of described second cell stores, passes to described modulation sending unit.
17. device according to claim 16 is characterized in that, described device also comprises:
The mapping table updating block is used for according to the detection of wireless channel, perhaps upgrades mapping table in described first memory cell and the re-transmission priority list in described second memory cell according to the coding rule of the signal that transmits in the wireless channel and/or modulation system.
18. a signal receiving device is characterized in that, comprises the receiving demodulation unit, separates map unit, the 3rd memory cell, wherein:
The receiving demodulation unit is used for the signal demodulation to receiving, and obtains coded-bit;
The 3rd memory cell is used for the big mapping table of separating of separating mapping ruler of corresponding codes bit column weight on the high position of storage representation signal to noise ratio;
Separate map unit, be used for the coded-bit that described receiving demodulation unit obtains being reduced, obtain and shine upon the preceding corresponding soft information of coded-bit according to the mapping table of separating of described the 3rd cell stores;
Decoding unit is used for the described information decoding that map unit is reduced, the data of acquisition transmission of separating.
19. device according to claim 18 is characterized in that, described receiving demodulation unit comprises a plurality of reception branch unitss; And
The information merge cells, the coded-bit information of carrying out that the demodulation of a plurality of reception branch units is obtained merges, and sends the described map unit of separating to.
20. device according to claim 19, it is characterized in that, also comprise the retransmission information merge cells, receive that the unit demodulation of described receiving demodulation obtains the re-transmission coded-bit, the coded-bit that retransmits is carried out sending the described map unit of separating to after high specific merges.
21. device according to claim 20 is characterized in that, described device also comprises:
Separate the mapping table updating block, be used for upgrading the mapping table of separating of described the 3rd memory cell according to the mapping table that sender unit upgrades.
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| WO2011075889A1 (en) * | 2009-12-23 | 2011-06-30 | 富士通株式会社 | Method and apparatus for mapping data streams to resource block in wireless communication system |
| CN103297689A (en) * | 2013-04-28 | 2013-09-11 | 温州市凯能电子科技有限公司 | Controllable video recycling and releasing network camera |
| CN103365814B (en) * | 2013-06-27 | 2016-08-17 | 深圳市汇顶科技股份有限公司 | A kind of serial data transmission method and system thereof |
| RU2673874C1 (en) * | 2014-12-11 | 2018-11-30 | Хуавэй Текнолоджиз Ко., Лтд. | Method of transmitting data, device of transmitting side and device of reception side |
| CN107294651A (en) * | 2016-04-11 | 2017-10-24 | 中兴通讯股份有限公司 | Coding method and device, interpretation method and device |
| EP3902142A1 (en) | 2016-05-12 | 2021-10-27 | MediaTek Inc. | Qc-ldpc coding methods and apparatus |
| CN106130656B (en) * | 2016-06-16 | 2019-01-25 | 上海交通大学 | Light ofdm signal coded modulation and demodulating system and method based on polarization code |
| CN106788883A (en) * | 2016-12-02 | 2017-05-31 | 上海微小卫星工程中心 | Data transmission method and transmission system |
| US10581457B2 (en) | 2017-01-09 | 2020-03-03 | Mediatek Inc. | Shift coefficient and lifting factor design for NR LDPC code |
| US10630319B2 (en) * | 2017-01-24 | 2020-04-21 | Mediatek Inc. | Structure of interleaver with LDPC code |
| US10432227B2 (en) | 2017-01-24 | 2019-10-01 | Mediatek Inc. | Location of interleaver with LDPC code |
| US10484013B2 (en) | 2017-05-12 | 2019-11-19 | Mediatek Inc. | Shift-coefficient table design of QC-LDPC code for smaller code block sizes in mobile communications |
| US10567116B2 (en) | 2017-05-12 | 2020-02-18 | Mediatek Inc. | Wireless communication using codebooks from a QC-LDPC code for shorter processing latency and improved decoder throughput efficiency |
| US10484011B2 (en) | 2017-05-12 | 2019-11-19 | Mediatek Inc. | Shift-coefficient table design of QC-LDPC code for larger code block sizes in mobile communications |
| WO2018228601A1 (en) | 2017-06-16 | 2018-12-20 | 华为技术有限公司 | Data processing method and data processing device |
| CN109150199A (en) | 2017-06-17 | 2019-01-04 | 华为技术有限公司 | A kind of interleaving treatment method and device for the Polar code that polarizes |
| CN111988044B (en) * | 2019-07-01 | 2022-07-19 | 中南大学 | Code word construction method of punctured Polar code |
| WO2021056399A1 (en) * | 2019-09-27 | 2021-04-01 | Qualcomm Incorporated | Feedback design for unequal error protection systems |
| CN111147086B (en) * | 2019-12-26 | 2022-04-22 | 中国科学院计算技术研究所 | Code modulation method, system, medium and electronic device |
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