Distributing CRC Bits to Aid Polar Decoding

Abstract

One recent and important advancement in information and coding theory is polar code, which is selected as the coding scheme for 5G eMBB control channels. In this paper, we propose a variant of polar codes that provides significant coding gain in the regime of short blocks and enables early termination of decoding processes. The overall scheme depends on distributing CRC bits in the whole information block, and a single interleaving/deinterleaving pattern can be defined to implement CRC distribution. The design can reduce the decoding latency and energy consumption of hardware, which is crucial for mobile applications like 5G.