- Cankaya University Journal of Science and Engineering
- Vol: 17 Issue: 2
- High Performance Low Latency Parallel Successive Cancelation Decoder Structures for Polar Codes
High Performance Low Latency Parallel Successive Cancelation Decoder Structures for Polar Codes
Authors : Abdelkareim Alrtaimi, Orhan Gazi
Pages : 128-136
View : 11 | Download : 7
Publication Date : 2020-11-01
Article Type : Research
Abstract :Polar codes are decoded using successive cancellation (SC) algorithm where likelihood ratios (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