High‐Throughput Fast‐SSC Polar Decoder for Wireless Communications
Xiaojun Zhang, Xiaofeng Yan, Qingtian Zeng, Jianming Cui, Ning Cao, Russell John Higgs · Wireless Communications and Mobile Computing · 2018
Polar code has been proven to achieve the symmetric capacity of memoryless channels. However, the successive cancellation decoding algorithm is inherent serial in nature, which will lead to high latency and low throughput. In order to obtain high throughput, we design a deeply pipelined polar decoder and optimize the processing elements and storage structure. We also propose an improved fixed‐point nonuniform quantization scheme, and it is close to the floating‐point performance. Two‐level control strategy is presented to simplify the controller. In addition, we adopt FIFO structure to implement the α _memory and β _memory and propose the 348‐stage pipeline decoder.