Joint Source-Channel Polar Coding for Biased Bernoulli Sources at Short Blocklengths
Mengfan Zheng, Jiaqi Gu, Mengyao Ma, Cong Ling · 2021
We study the design of joint source-channel polar coding for biased Bernoulli sources in this paper, focusing on short blocklengths. We first apply the CRC-aided successive cancellation decoding scheme to source polar coding and demonstrate its superior performance at short blocklengths. Then we design a joint decoding scheme for concatenated source-channel polar codes, using soft information from the source decoder and source CRC bits to aid channel decoding. Simulations show that the proposed scheme outperforms separate source-channel polar coding and can even break through the finite blocklength bound of separate source-channel coding in some cases.