Method for multi-code-rate coding based on grouped Markov superposition coding

A technology of superposition coding and coding method, which is applied in the field of digital communication and digital storage, and can solve the problems of complex design process and poor performance.

Active Publication Date: 2014-06-25
SUN YAT SEN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0006] The existing multi-rate code technology requires a complex design process, such as designing a multi-rate low-density parity-check code, which needs to optimize its d

Method used

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  • Method for multi-code-rate coding based on grouped Markov superposition coding
  • Method for multi-code-rate coding based on grouped Markov superposition coding
  • Method for multi-code-rate coding based on grouped Markov superposition coding

Examples

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Embodiment 1

[0041] refer to figure 1 , this example is used to convert the binary information sequence of length K=kBL=k×1250×1000 Encoded as length nB(L+m k )=8×1250×(1000+m k ) codeword Among them, n=8, k takes the value {1, 2, 3, 4, 5, 6, 7}, that is, the code rate set is {1 / 8, 2 / 8, 3 / 8, 4 / 8, 5 / 8, 6 / 8, 7 / 8}, L=1000 is the number of equal-length kB=1250k sequence packets, the code rate is 1 / 8, 2 / 8, 3 / 8, 4 / 8, 5 / 8, 6 / 8, The memory lengths corresponding to the subcodes of 7 / 8 are m 1 =11,m 2 =10, m 3 =6, m 4 =5,m 5 =5,m 6 =4,m 7 =2, the encoder is a multi-rate polar code with a length of 8, which is an 8-dimensional Hadmard matrix permuted by H = 1 1 1 1 1 1 1 1 ...

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Abstract

The invention belongs to the field of digital communication and digital storage, and particularly relates to a method for multi-code-rate coding based on grouped Markov superposition coding. The method is used for coding a binary information sequence shown in a specification to a codon shown in the specification, wherein the length of the binary information sequence conforms to the formula: K=kBL, the length of the codon is nB(L+m[k]), n is larger than 1, k ranges from 1 to n-1, namely, a code rate set is {1/n, 2/n,..., (n-1)/n}, L is the number of kB sequence groups of the same length, and mk is the memory span of each sub code with the code rate being k/n. The method comprises the following steps that firstly, the information sequence is divided into L groups shown in the specification with the equal length and a sequence shown in the specification with the length of nB is initiated when t is equal to -1, -2,...,-(mk-1), -mk; then, when t is equal to 0, 1, ...L-1, a sequence shown in the specification with the length being kB is divided into B groups and the B groups are sent to conversion defined by an n-dimensional matrix H for coding, so that a coding sequence shown in the specification with the length of nB is obtained and combined with elements shown in the specification, and the tth sub sequence shown in the specification of the codon shown in the specification is calculated. The method for multi-code-rate coding is simple in design, wide in code rate range and superior in performance.

Description

technical field [0001] The invention belongs to the field of digital communication and digital storage, in particular to a multi-rate coding method based on packet Markov superposition coding. Background technique [0002] In practical communication systems, several error-correcting codes with different code rates are usually required. Especially in a wireless communication system, adaptive coding and demodulation can be realized in this way, thereby avoiding the problem of high outage probability caused by a single-code system, and making effective use of scarce bandwidth resources. Therefore, it is necessary to design a pair of codecs that can realize error correction codes with various code rates. [0003] Rate-compatible codes (Rate-compatible codes, RC codes) are a type of multi-rate codes obtained by shortening the information bits of the mother code and expanding or punching the parity bits. For code rate compatible codes, the code lengths of different code rates ar...

Claims

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Application Information

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IPC IPC(8): H03M13/23H03M13/09
Inventor 马啸胡竞男梁楚龙白宝明
Owner SUN YAT SEN UNIV
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