摘要
对TETRA(Terrestrial Trunked Radio)数字集群系统中使用的截短RM(Reed-Muller)码进行研究,提出了基于大数逻辑译码算法的改进方法。首先,对接收到的30位软比特信息码元按幅值的绝对值由大到小排序,依次反转序列后几位可靠度较低码元的符号位得到多个新的序列,再对新序列进行大数逻辑译码。最后计算新序列译码结果的代价函数,选择代价函数最小的作为最终译码结果。该方法改善了接收数据中低可靠度码元对译码结果的影响,提升了译码性能。所提出的方法可接近最大似然译码效果,在信噪比较低的情况下依然具有较好的译码性能。
In this paper,a study is conducted on the shortened Reed-Muller(RM)code used in TETRA trunking system,and an improved algorithm based on majority-logic decoding algorithm is proposed.Firstly,the received 30 soft information bits are sorted in descending order,and the sign of the last few bits of the sorted sequence with low reliability are reversed in turn to obtain many new sequences.Then,the majority-logic decoding algorithm is used to decode the new sequences.Finally,the cost function of the decoding results are calculated,and the one with the smallest cost function is selected as the final decoding result.The algorithm improves the impact of low reliability symbols in received data on decoding results and enhances decoding performance.The algorithm proposed in this paper can approach the maximum likelihood decoding effect,and has good performance even at low SNR ratios.
作者
李鑫
孙敬伟
Li Xin;Sun Jingwei(Hebei Far East Communication System Engineering Co.,Ltd.,Shijiazhuang 050200,China;Hebei Private Network Communication Technology Innovation Center,Shijiazhuang 050200,China)
出处
《电子技术应用》
2026年第2期52-56,共5页
Application of Electronic Technique
