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Data encoding method and device

A data encoding and encoding technology, applied in the field of data encoding, can solve the problems of inaccurate decoding results, reduced decoding performance, decoding errors, etc., achieve accurate decoding results, improve decoding performance, and reduce the influence of phase difference Effect

Active Publication Date: 2021-03-05
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, for encoding methods such as RM code or Polar code, if the receiving device adopts binary phase shift keying (BPSK) modulation, because BPSK modulation needs to use phase information, it may lead to incoherent detection scenarios, The obtained decoding result is inaccurate, a decoding error occurs, and the decoding performance is reduced

Method used

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Examples

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example 1

[0089] First, construct the RM code generation matrix, n can be understood as the code length, for example, when When n=8, Then remove the serial number of the column whose column weight is an odd number in the G matrix to obtain the first sequence, and then select K rows from the first sequence according to the row weight, and the serial numbers of the K rows correspond to the information bits in the bit sequence u Location. Wherein, K=4 is taken as an example. Then the index of the information bit Including [1, 2, 4, 5], fixed bit index Include [0, 3, 6, 7].

[0090]

[0091] Then modulate the encoded bit c to obtain a modulated signal map(c), and send it to the receiving device.

[0092] If the receiving device adopts coherent detection, after passing through an additive white Gaussian noise (AWGN) channel, the received signal is: y=map(c)+n, where n is noise. The received signal is then decoded.

[0093] If the receiving device uses non-coherent detection, ...

example 2

[0097] First, build the generator matrix, n can be understood as the code length, for example, when When n=8,

[0098]

[0099] Then determine the serial number of the column whose column weight is an odd number in the G matrix, and use the serial number as the serial number of the parity bit, that is, the serial number 7. And, remove the sequence number of the column whose column weight is an odd number in the G matrix to obtain the first sequence. Then select K rows from the first sequence according to the row weight, and the sequence numbers of the K rows correspond to the positions of the information bits in the bit sequence u. Wherein, K=3 is taken as an example.

[0100] In descending order of row weight, the K serial numbers include includes [3, 5, 6], Include [0, 1, 2, 4]. A (K, n) code can be obtained, hereinafter referred to as RM-like code.

[0101] The decoding method of the receiving device is similar to the first example above, and will not be repea...

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Abstract

The invention provides a data encoding method and device, which are used for improving the encoding and decoding performance under non-coherent detection and improving the decoding accuracy. The method comprises the steps that the column weight and the row weight of a generated matrix are determined, k serial numbers are determined from a first sequence of the generation matrix, wherein the firstsequence comprises serial numbers of rows of the generation matrix, and the first sequence does not comprise serial numbers of columns with odd column weights in the generation matrix, a bit sequenceu is determined according to the K serial numbers, the u comprises information bits and fixed bits, and the K serial numbers are used for identifying the positions of the K information bits in the u,and encoding is carried out according to u and the generation matrix to obtain encoded bits.

Description

technical field [0001] The present application relates to the field of communications, and in particular to a data encoding method and device. Background technique [0002] At present, with the development of the communication field, the requirements for delay and reliability of data transmission in various communication scenarios are also getting higher and higher. As the most basic wireless access processing in data transmission, channel coding plays a very important role in data transmission. [0003] In existing schemes, Reed-Muller (Reed-Muller, RM) codes are widely used in data transmission because of their very small code distance. Among them, the construction process of the RM code includes: calculating the weight of the row of the F matrix corresponding to each bit, and then using the corresponding position of the row number of the row in the RM code as the information bit to carry the information to be transmitted, and the row The corresponding position of the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11
CPCH03M13/1105H03M13/1148H03M13/13H03M13/136H03M13/31H04L1/0057
Inventor 沈晖李斌刘凌顾佳琦
Owner HUAWEI TECH CO LTD
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