Design and Performance of Polar Codes for 5G Communication under High Mobility Scenarios

摘要

With the development of high-speed trains (HST), efficient and reliable communication services in high mobility scenarios have become an urgent demand. As one of the strong candidates in 5G wireless system, polar codes along with its optimized design should also be investigated under high mobility scenarios. In this paper, a scheme of hash-concatenated polar codes is proposed to reduce the false alarm rate, which is a key performance in 5G enhanced mobile broadband control channel. Then, for data channels, hash-based cyclic redundancy check (CRC)-aided polar codes with a joint successive cancellation list decoding method is introduced to improve the error-correcting performance. Simulation results show that the hash-concatenated polar codes can achieve both the lower false alarm rate and better error-correcting performance than conventional CRC-aided polar codes in both the AWGN and high mobility channels. Furthermore, with the joint decoding approach, hash-based CRC-aided polar codes perform better than LTE turbo codes for high-order modulations in terms of the frame error rate over the HST channel.