【摘要】 基于信道容量规则和分组分割,构造自适应于AWGN和Rayleigh两种信道的多级编码系统,为移动信道编码调制系统的设计度量提供参考。提出利用信道状态信息的软判决支路度量计算公式,分析分组分割方案的自适应特性,比较软、硬判决译码对系统性能的影响,结果表明本文提出的自适应系统比未编码系统获得可观的编码增益。更多还原

【Abstract】 Based on capacity rule and block partitioning (BP) strategy, a robust multilevel coding (MLC) scheme is proposed for AWGN and Rayleigh fading channels. The formulations for computing the soft decision metrics with channel state information (CSI) are presented and the performance comparisons are made for soft- and hard-decision. The robustness of BP scheme is analyzed. The considerable coding gains over uncoded 4ASK system can present some references for the optimal design of multilevel coding scheme.更多还原