Input-Distribution-Aware Successive Cancellation List Decoding of Polar Codes

Polar codes are linear block that can achieve channel capacity at infinite code length. Successive cancellation list (SCL) decoding relies on a set of parallel decoders; it yields good error-correction performance finite length, the cost increased implementation complexity and power consumption. Current efforts in literature focus design-time decoder reduction, while lacking practical run-time reduction methods. In this work, input-distribution-aware SCL (IDA-SCL) is proposed, allows to determine parallelism adopt by performing simple observations input decoder. This technique guarantees fixed, short latency hardware decoders dynamically shut down part internal before each process. It be combined with existing complexity- power- techniques. Simulation results show IDA-SCL reduce up 50%.