Hybrid coding scheme based on repeat-accumulate and polar codes

Abstract

A hybrid coding scheme using repeat-accumulate (RA) code and polar code as subcodes is presented to improve the performance of block error probability. As the simplest turbo-like code, punctured RA code is introduced to improve the reliability of the hybrid scheme. A low complexity algorithm, belief propagation/successive cancellation hybrid decoding algorithm is proposed. Compared with polar code, this hybrid scheme can provide 0.3 dB coding gain with the code length 1024 and code rate 1/2. In contrast with RA code, it has no error floor in the additive white Gaussian noise channel.