计算机科学 ›› 2018, Vol. 45 ›› Issue (9): 141-145.doi: 10.11896/j.issn.1002-137X.2018.09.022
孟嘉慧, 赵旦峰, 田海
MENG Jia-hui, ZHAO Dan-feng, TIAN Hai
摘要: 根据5G移动通信中高速率、低时延、大容量数据传输及多种场景的特点,提出了一种面向5G的基于多元LDPC码的低复杂度译码算法,即混合域Log-FFT-BP(Mixed Log-FFT-BP)译码算法。该算法直接对概率信息求对数,避免求解对数似然比操作,并且在校验节点的更新过程中,采用对中间变量求对数再对校验节点信息求傅里叶逆变换的方式,来进一步降低译码复杂度。从5G信道编码需支持更广泛的码块长度和更多码率的角度进行仿真,结果表明,与传统译码算法相比,改进的Mixed log-FFT-BP算法性能相差不大,约为0.1~0.2dB,且能够降低译码复杂度,更利于硬件平台的实现。
中图分类号:
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