HARQ (Hybrid Automatic Repeat Request) signal transmitting method and device and receiving method and device based on polar codes

Abstract

The embodiment of the invention provides an HARQ (Hybrid Automatic Repeat Request) signal transmitting method and device and receiving method and device based on polar codes. When transmitting is carried out at a time, when it is judged that there are surplus data blocks, one data block is selected out from the surplus data blocks as an initial transmitting information sequence; the combination of first sub-sequences and second sub-sequences corresponding to negative acknowledge signals in a first retransmitting control queue is determined as a retransmitting information sequence, wherein the first sub-sequences and the second sub-sequences are stored in a transmitting cache queue; the initial transmitting information sequence and the retransmitting information sequence are determined as to-be-transmitted information sequences; one first sub-sequence of the determined to-be-transmitted information sequences is stored in the transmitting cache sequence; polar coding is carried out to the to-be-transmitted information sequences; and the to-be-transmitted information sequences are transmitted. The accurate decoding probability of the information sequences failed to be transmitted for former M times is improved; therefore, the throughput of the communication system is improved; the average transmitting and receiving times before the accurate decoding is carried out to the to-be-transmitted information sequences is reduced; and therefore, the transmission delay of the communication is reduced.

Description

technical field [0001] The present invention relates to the field of digital communication, in particular to a polar code-based HARQ signal sending and receiving method and device. Background technique [0002] In the digital communication system, due to the interference of the transmission channel on the communication process, it is easy to cause errors in the transmitted data, thereby reducing the system throughput. Polar codes (Polarcodes) is a constructive coding method proposed by E.Arikan in 2009 that has been strictly proven to achieve channel capacity. In communication applications that are not sensitive to system delay, Hybrid Automatic RepeatreQuest (HARQ) technology is a commonly used transmission method for improving system throughput. Therefore, the polar code-based HARQ transmission method is often used to improve system throughput. [0003] At present, there are mainly two HARQ transmission methods based on polar codes. One is: the HARQ transmission method o...

AI Technical Summary

Problems solved by technology

[0004] The research shows that the punctured polar code HARQ transmission method based on Chase combination does not improve the system throughput significantly; The average number of retransmissions in the medium is too large, resulting in high transmission delay

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