A Throughput-Efficient Rateless Scheme of Polar Codes
Hao Liang, Aijun Liu, Yingxian Zhang, Fengyi Cheng, Xuan Yi · 2018
In this paper, a new rateless scheme of polar codes is designed via extending and puncturing for unknown AWGN channel. In the proposed scheme, a heuristic and pragmatic construction method of polar codes is utilized for rateless coding, which could be applied for time-varying channel. By copying information bits to more reliable bit channels when extending the codes, the scheme could obtain full coding gain. Moreover, to improve throughput performance, we explore the optimal initial coding rate of first transmission to achieve maximal throughput. Simulation results indicate that our proposed rateless scheme could improve block error rate (BLER) and throughput performance in contrast to the existing scheme.