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A synchronization-free communication method, device and system based on polar codes

A communication method and polar code technology are applied in the field of error correction coding and decoding, which can solve the problems of poor communication quality and inability to receive sequence decoding of codewords, so as to ensure correctness, ensure reliability, improve coding efficiency and error correction. performance effect

Active Publication Date: 2021-07-27
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a synchronization-free communication method, device and system based on polar codes. When the number of phase value combinations is greater than the maximum number of input codeword receiving sequences of the multi-codeword receiving sequence SCL decoder, it is impossible to decode a large number of codeword receiving sequences, resulting in poor communication quality.

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  • A synchronization-free communication method, device and system based on polar codes
  • A synchronization-free communication method, device and system based on polar codes
  • A synchronization-free communication method, device and system based on polar codes

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Embodiment Construction

[0073] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0074] In order to achieve the above object, in the first aspect, the present invention provides a synchronization-free communication method based on polar codes, such as figure 1 shown, including the following steps:

[0075] S1. The sending end performs polar code encoding on the information bit sequence, modulates to form a sending signal, and then sends it to the receiving end;

[0076] Sp...

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Abstract

The invention discloses a synchronization-free communication method, device and system based on polar codes. The receiving end uses a combination of multiple sets of preset signal start times, modulation center frequencies and channel phases to time the received signals. Sampling, frequency offset correction, and phase correction processing, after demodulation, P' codeword receiving sequences are obtained, and then based on the idea of ​​divide and conquer, each P codeword receiving sequence in the P' codeword receiving sequences is simultaneously decoded, Get P′ / P decoding results, select the decoding result that is most likely to be the correct codeword from the obtained decoding results based on the maximum likelihood principle, and judge its validity, if valid, extract the information to complete the communication; this method is not limited to the multi-codeword reception sequence SCL decoder can handle the codeword reception in the case of a large number of value combinations of the sampling start position, carrier frequency offset, and carrier phase The number of sequences, the communication quality is higher.

Description

technical field [0001] The invention belongs to the technical field of error correction coding and decoding, and more specifically relates to a polar code-based synchronization-free communication method, device and system. Background technique [0002] Synchronization is a key technical link in the communication system. Only when the sending and receiving parties are synchronized in the three aspects of signal start time, modulation center frequency and channel phase, can communication be carried out normally. In order to realize synchronous communication, the existing method embeds a synchronous sequence in the communication signal to be sent, and the synchronous sequence provides the receiver with the signal start time, modulation center frequency and channel phase of the sender. In the communication process, the synchronization sequence consumes precious channel resources and reduces the spectrum utilization efficiency. On the other hand, the use of synchronization seque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/01H04L1/00
CPCH03M13/01H04L1/0057
Inventor 屈代明陈欣达江涛
Owner HUAZHONG UNIV OF SCI & TECH
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