An Adaptive Fusion Successive Cancellation List Decoder For Polar Codes With Cyclic Redundancy Check
IEICE TRANSACTIONS ON COMMUNICATIONS(2020)
Abstract
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.
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Key words
polar codes, Gaussian approximation, adaptive fusion successive cancellation list decoder, probability threshold
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