Decoder-Profile-Aware Polar Code Construction for Low-Latency Wireless Access

Polar codes are widely used for reliable wireless access, but their decoding latency remains a practical concern. Existing reliability-oriented constructions optimize bit-channel reliability, while overlooking the decoder-dependent latency associated with special-node-based fast decoding. This paper proposes a decoder-profile-aware polar code construction method that analyzes the decoding-tree structure under a given decoder profile and refines the information set through reliability-constrained bit exchange. Using the full-rank fast parallelized list (F-FPL) decoder profile as a representative profile, the proposed construction reduces decoding time steps by up to 45.1% compared with the 5G baseline while maintaining comparable block error rate (BLER) performance.