Performance Evaluation on Polar Codes in High Mobility Scenarios

Abstract

As a critical scenario in 5G wireless system, high speed railway (HSR) is deployed widely around the world. However, implementing 5G in HSR scenarios remains a challenge as high speed makes the channel doubly selective. Nevertheless, polar codes, as the first provably capacity-achieving codes with low encoding and decoding complexity appear to be a promising coding strategy to tackle this problem. To the best of our knowledge, although polar codes have been studied extensively in theoretical issues, the performance of polar codes in high mobility scenarios, i.e., HSR, has not been investigated before. To give guidance on practical application of polar codes in HSR scenario, we model the channel with doubly selective feature based on 3GPP standard, and implement polar codes in such channel to get the performance evaluation compared with polar codes in AWGN channel. Numerical results show that polar codes with short block-length and large list size are preferable in high speed mobility scenarios.