High Performance Low Latency Parallel Successive Cancelation Decoder Structures for Polar Codes

Authors : Abdelkareim ALRTAİMİ, Orhan GAZİ

Pages : 128-136

View : 19 | Download : 13

Publication Date : 2020-11-01

Article Type : Research Paper

Abstract :Polar codes are decoded using successive cancellation insert ignore into journalissuearticles values(SC); algorithm where likelihood ratios insert ignore into journalissuearticles values(LRs); for data bits are calculated in a sequential manner, and decisions are made using the calculated LRs. During the decoding of an information bit, the decision results for the predecessor bits are used, and a wrongly decided predecessor bit has negative effect on the accurate calculation of the LR for the information bit being decoded. In SC algorithm, when LR=1, the information bit is decoded as u ̂_i=0, however, such a decision has 50% of chance of being correct. In this paper, we propose improved polar decoders utilizing a number of SC decoders. We consider the case of LR=1, and propose polar decoder structures for the more accurate calculation of the LRs of the successor bits.
Keywords : Multi Parallel SCD, Polar Coding, BEC