Reversed Sequence Check-Aided Successive-Cancellation List Decoder for Systematic Polar Codes

Systematic polar codes has better error performance than non-systematic polar codes, but there is no explicit systematic decoding algorithm. The scheme, Non-systematic decoding algorithms cascade recoding procedure, is used for the decoding of systematic polar codes usually, but it takes great latency. A systematic decoding scheme based on reverse sequence check successive cancellation list is proposed to solve this problem. This scheme is path adaptive, it eliminates recoding procedure with the trace-back update and reduces resources occupation by update-check strategy. The researches show that this scheme can reduce 50% resources occupation as well as decoding latency, and achieve slightly better performance comparing with the concatenated decoding scheme based on adaptive successive cancellation list.