Block coding method and device

Abstract

The invention provides a block coding method and device, and relates to the technical field of digital communication, and the method comprises the steps: obtaining a to-be-coded bit sequence, taking the length N of the to-be-coded bit sequence as a period, repeating the to-be-coded bit sequence for L times, so as to obtain L bit sequences, wherein L and N are positive integers; inputting each bit sequence into a corresponding interleaver in preset L interleavers for interleaving; sequentially taking k * J bits out from the interleaved sequence, constructing K J-dimensional first vectors, and carrying out linear block code coding on each first vector to output K M-dimensional second vectors, wherein K, J and M are positive integers, and KJ is smaller than or equal to LN; and sequentially carrying out differential processing and modulation on the K second vectors according to a preset modulation mechanism, and sending a modulation signal obtained after modulation to a receiving end. The method solves the problem of initial phase ambiguity during demodulation of a communication system, and has higher burst error resistance.

Description

technical field [0001] The present application relates to the technical field of digital communication, and in particular to a block encoding method and device. Background technique [0002] In the field of communication technology, there are currently a variety of channel coding technologies that can improve the reliability of information transmission, for example, Turbo codes, low-density parity-check codes LDPC codes, repetitive accumulation codes RA codes, and the like. Among them, the RA code can adopt a coding structure similar to the Turbo code, and can also use the iterative decoding algorithm of the LDPC code, so that the RA code has the advantages of simple coding and low decoding complexity. [0003] In related technologies, the encoding steps of RA codes are mainly composed of repetition, interleaving, combination and accumulation with a code rate of 1 / q. However, the applicant found that because the channel is often interfered by noise in practical applications...

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Problems solved by technology

However, the applicant found that because the channel is often interfered by noise in practical applications, the channel coding technology in the related art may not be able to obtain all the correct information sequences on the receiving side, and the ability to resist burst errors is weak

Moreover, in the coherent demodulation of the communication system, there are two possible phases of the carrier signal extracted from the received signal, namely, 0 phase and π phase. phase ambiguity

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