Interleaving and deinterleaving method and device based on congruence class interleaving mapping sequence

Abstract

The invention discloses an interweaving and de-interweaving method based on a congruence class interweaving mapping sequence. A transmitting terminal generates the congruence class interweaving mapping sequence with the same length as a communication system basic interweaving unit, and an interweaver carries out interweaving operation on the basic interweaving unit according to the interweaving mapping sequence; at a receiving terminal, a de-interweaver carries out de-interweaving operation on received data according to the basic interweaving unit with the same interweaving mapping sequence as the transmitting terminal, and user data are recovered. The invention further provides an interweaving and de-interweaving device based on the congruence class interweaving mapping sequence, wherein the interweaving and de-interweaving method is adopted in the interweaving and de-interweaving device. Compared with the prior art, the degree of dispersion of interweaving on the data is combined with the burst error occurrence probability, the data with the closer distance are larger in dispersion degree after being interwoven, and the system performance can be significantly improved.

Description

technical field [0001] The invention relates to an interleaving and deinterleaving method and device based on a congruence class interleaving mapping sequence, and belongs to the technical field of wireless communication systems. Background technique [0002] In communication systems, due to noise, channel fading, etc., errors will occur during signal transmission. Using channel coding to process the signal accordingly can make the system have certain error correction ability and anti-interference ability. However, channel coding cannot correct continuous long strings of erroneous bits caused by multipath fading and rapidly changing channel conditions. In order to overcome this difficulty, people often combine channel coding and interleaving technology, that is, rearrange the coded signal according to certain rules, so as to discretize the long series of error bits, and use forward error correction code to correct the discreteness. Errors, improve the reliability of the en...

AI Technical Summary

Problems solved by technology

Through the above-mentioned traditional interleaving method, adjacent data can be discretized to a position whose distance is the interleaving depth, but this interleaving method does not take into account that the probability of burst data errors decreases with the increase of the burst length, that is, the distance between The closer the data is, the greater the probability of burst errors that cause errors in both data, and the two data should be discretized to the farther position through interleaving

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