An Adaptive Fusion Successive Cancellation List Decoder For Polar Codes With Cyclic Redundancy Check

In this paper, we propose an adaptive fusion successive cancellation list decoder (ADF-SCL) for polar codes with single cyclic redundancy check. The proposed ADF-SCL decoder reasonably avoids unnecessary calculations by selecting the successive cancellation (SC) decoder or the adaptive successive cancellation list (AD-SCL) decoder depending on a log-likelihood ratio (LLR) threshold in the decoding process. Simulation results show that compared to the AD-SCL decoder, the proposed decoder can achieve significant reduction of the average complexity in the low signal-to-noise ratio (SNR) region without degradation of the performance. When L-max = 32 and E-b/N-0 = 0.5 dB, the average complexity of the proposed decoder is 14.23% lower than that of the AD-SCL decoder.