摘要
极化码(Polar Codes)串行抵消(Successive Cancellation,SC)译码算法存在错误传播特性。为了抑制译码过程中的错误传播,提出了一种改进的串行抵消比特翻转译码算法。该算法分段构造极化码的信息序列,使得译码纠错更加及时,从而有效抑制错误传播。此外,通过分段校验新算法实现了多比特翻转,提高了翻转效率,进而改善了译码性能。仿真结果表明:当误帧率为10^(-4)时,相同码长和有效码率情况下,较SC译码算法、串行抵消列表(Successive Cancellation List,SCL)译码算法(L=2)和串行抵消翻转(Sccessive Cancellation Flip,SCFlip)译码算法,提出的基于极化特性构造的新算法分别有约0.74 dB、0.33 dB和0.28 dB的性能增益。
The polar codes successive cancellation decoding algorithm has the error propagation characteristics.In order to suppress the error propagation in the decoding process,a modified successive cancellation bit-flipping decoding algorithm is proposed.The algorithm piecewisely constructs the information sequence of polarization code,making the decoding error correction more timely,and thus effectively restraining error propagation.In addition,by piecewise check,the new algorithm realizes the multi-bit flipping,improves the turnover efficiency,and then the decoding performance.Simulation results indicate that when the frame error rate is10-4,in the case of the same code length and effective bit rate,compared with SC decoding algorithm,successive cancellation list decoding algorithm(L=2)and successive cancellation flip decoding algorithm,the proposed new algorithms based on polarization characteristics have approximately0.74dB,0.33dB,and0.28dB performance gains,respectively.
作者
王杰
郭锐
WANG Jie;GUO Rui(Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)
出处
《通信技术》
2018年第3期516-521,共6页
Communications Technology
基金
浙江省自然科学基金(No.LY16F010013)
浙江省重点科技创新团队基金(No.2013TD03)~~
关键词
极化码
串行抵消译码算法
错误传播
极化特性构造
比特翻转
polar code
successive cancellation decoding algorithm
error propagation
polarization characteristic construction
bit flipping
