A Reliability-Based Adaptive IR-HARQ Scheme for Polar Coded Systems
Rongchi Xu, Peiyao Chen, Min Zhu, Baoming Bai · 2020
In this paper, we propose a reliability-based adaptive incremental redundancy hybrid automatic repeat request (IR-HARQ) scheme for rate-compatible polar codes, where the size of retransmissions is determined by the current decoding reliability. Simulation results indicate that the proposed scheme can perform better than the existing schemes based on turbo codes, low-density parity-check (LDPC) codes and raptor codes in terms of both the throughput and latency. Furthermore, with the proposed scheme, rate-compatible polar codes can achieve the performance of about 0.5 dB away from the channel capacity with the information block length of 1024 bits.