Method and apparatus for rate matching of polar codes

Abstract

The invention discloses a method and a device for rate matching of Polar codes. The method includes: encoding an information bit sequence with a length of K bits with a Polar code to generate an encoded bit sequence with a length of M bits; Choose N from the sequence min bits, as the first bit to the Nth bit of the to-be-transmitted bit sequence in the HARQ transmission process min bits; determine the Nth bit sequence to be transmitted from the information bit sequence and the coded bit sequence min +1 bit to Nth max each bit of bits, where the Nth of the sequence of bits to be transmitted is determined min +1 to Nth max Each bit of the bit is determined according to the frame error rate of the bit sequence to be transmitted when each bit is added to the bit sequence to be transmitted. The method of the embodiment of the present invention can realize HARQ transmission based on Polar code coding, and can obtain a good coding gain.

Description

technical field [0001] Embodiments of the present invention relate to the field of coding, and more specifically, to a method and device for rate matching of polar codes. Background technique [0002] Communication systems usually use channel coding to improve the reliability of data transmission and ensure the quality of communication. Recently, the polar (Polar) code proposed by Arikan is the first good code that can obtain Shannon capacity and have low encoding and decoding complexity theoretically. When the code length is short, the performance of the traditional Serial Cancellation (Successive Cancellation, SC) decoding is not ideal, and its performance is not as good as the Low-Density Parity-Check (LDPC) which has been widely used at present. code or Turbo code. [0003] The latest research shows that based on the improvement of the SC algorithm, the serial cancellation list (Successive CancellationList, SCL) decoding, the serial cancellation stack (Successive Cance...

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Problems solved by technology

[0006] However, the code length of traditional Polar codes is strictly limited and must be an integer power of 2, which cannot be applied to systems that require code lengths that can be flexibly adapted to system requirements using HARQ transmission schemes.

In the prior art improved on this, the coding is simply repeated during retransmission, and a good coding gain cannot be obtained.

When the coding gain is improved, the decoding complexity is very large

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