一种变指数连续相位调制系统方案  

Scheme of alterable modulation index continuous phose modulation system

作　　者：罗清勇[1] 郭道省[1] 张亦军 

机构地区：[1]解放军理工大学通信工程学院 [2]解放军68026部队

出　　处：《解放军理工大学学报（自然科学版）》2007年第4期343-347,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：为了提高连续相位调制(CPM)方式下卫星通信系统发射功率的利用效率,提出了一种变指数连续相位调制系统方案。利用调制指数对CPM欧氏距离影响的原理,通过指数同步协议使用户终端的调制指数动态适应雨衰,从而达到尽可能利用发射功率的目的。对基于4进制2指数线性映射全响应CPM的具体设计方案的仿真表明:变指数CPM相对于传统的CPM具有更好的功率和带宽效率;在恶劣气候条件下,具有更好的连续通信能力。The single-h and multi-h CPM（continuous phose modulation） have been paid much attention because of some of their good performance, but how to make use of the alteration of modulation index （single-h） or index group （multi-h） to improve power efficiency has never been studied in open literatures. In context, a scheme of alterable modulation index CPM （abbreviated as AHCPM） system was introduced, with which the power of satellite communication system could be utilized much better. This system was based on the principle that modulation index could influence the euclidean distance of CPM, and made different user terminals dynamically change modulation index or index group at the same time according to rain fade by index synchronization protocol. By simulating, the conclusion was drawn that AHCPM can gain more data throughput or power efficiency, and has better ability of continuous communication than the traditional CPM.

关 键 词：卫星通信 连续相位调制 变调制指数 

分 类 号：TN927[电子电信—通信与信息系统]