Low‐latency BP decoder of polar code with alternate‐structure scheduling scheme
Xiaojun Zhang, Xiaofeng Yan, Jianming Cui, Yanfei Dong · Electronics Letters · 2020
In this Letter, a new scheduling scheme for belief propagation (BP) is proposed to reduce the decoding latency. All the stages update messages at the same time, it improves the reliability and accelerates the decoding convergence. The authors also remove the last stage of factor graph to reduce computational complexity. Simulations show that the average decoding latency of a (1024,512) polar code is reduced to 29.4 clocks.