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极化码的参数捷变技术及性能仿真
张凯
0
(西安烽火电子科技有限责任公司,西安 710075)
摘要:
极化码是首个能够从理论上证明接近信道容量的纠错码,于2016年11月和低密度奇偶校验码一并作为第5代移动通信的标准。针对极化码特有的蝶形结构采用Trellis对其进行了重新描述,详细分析了串行抵消列表译码算法。同时,基于密度进化理论给出了极化码的码参数捷变技术,能够在不改变编译码器硬件结构与程序的情况下实时、快速地改变编译码参数。仿真结果表明,在编码参数近似相同的情况下极化码的性能要优于低密度奇偶校验码。
关键词:  极化码  低密度奇偶校验码  参数捷变  串行抵消列表译码算法
DOI:
基金项目:
Coding parameters agility of polar code and its simulation
ZHANG Kai
(Xi′an Fenghuo Electronic Technology Co.,Ltd.,Xi′an 710075,China)
Abstract:
Polar codes,the first forward error control codes proved to approach channel capacity,have been adapted as standard along with Low Density Parity Check(LDPC) codes in the 5G mobile communication in November 2016.The special butterfly structure of polar code is re-described by the Trellis,and the Successive Cancel List(SCL) decoding algorithm is analyzed.Meanwhile,coding parameters agility technique is proposed based on puncture and density evolution theory.The technique can realize on line polar code with any code length and code rate quickly,without changing the structure of decoder and hard program.Simulation results show that,with nearly the same code parameters,the performance of polar codes are better than that of LDPC codes.
Key words:  polar codes  low density parity check(LDPC) code  parameter agility  successive cancel list(SCL) decoding algorithm
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