CRC-Aided Decoding of Polar Codes
CRC-Aided Decoding of Polar Codes
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Polar 码的 CRC 辅助解码
DOI：
10.1109/lcomm.2012.090312.121501
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发表时间：
2012-10-01
期刊：
影响因子：
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通讯作者：
Chen, Kai
中科院分区：
文献类型：
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作者：
Niu, Kai;Chen, Kai
为了提高极化码的性能，提出了循环冗余校验（CRC）辅助译码方案.给出了串行抵消译码及其改进的链表或栈的统一描述，提出了CRC辅助的串行抵消链表/栈（CA-SCL/SCS）译码方案。在二进制输入加性白色高斯噪声信道（BI-AWGNC）中的仿真结果表明，在误块率（BLER）为10-4的情况下，与3GPP标准中码率为1/2、码长为1024的Turbo码相比，CA-SCL/SCS可以提供0.5 dB的显著增益。此外，CA-SCS译码器的时间复杂度远低于Turbo译码器，并且在高信噪比情况下可以接近连续消除（SC）译码器的时间复杂度。
CRC (cyclic redundancy check)-aided decoding schemes are proposed to improve the performance of polar codes. A unified description of successive cancellation decoding and its improved version with list or stack is provided and the CRC-aided successive cancellation list/stack (CA-SCL/SCS) decoding schemes are proposed. Simulation results in binary-input additive white Gaussian noise channel (BI-AWGNC) show that CA-SCL/SCS can provide significant gain of 0.5 dB over the turbo codes used in 3GPP standard with code rate 1/2 and code length 1024 at the block error probability (BLER) of 10-4. Moreover, the time complexity of CA-SCS decoder is much lower than that of turbo decoder and can be close to that of successive cancellation (SC) decoder in the high SNR regime.