卫星链路QPSK解调优化设计与实现  

Optimal Design and Implementation of QPSK Demodulation in Satellite Link

作　　者：彭勃[1] 白园 耿亮[1] 

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2016年第5期639-643,共5页Communications Technology

摘　　要：对QPSK调制信号在卫星系统中的重要应用进行了深入研究,指出了目前卫星领域数字解调面临的困难和不足,分析了传统数字解调设计方案,为了提升卫星链路宽带信号数字解调的工程实现能力,在传统方案基础上给出了优化设计方案。首先对优化后的数字科斯塔斯环及匹配滤波单元进行了仿真验证,然后通过FPGA工程实现比较了传统数字解调设计与优化后的设计方案硬件资源使用情况,最后以优化设计方案为模型进行实现并与理论解调性能进行误码率仿真对比,验证了QPSK解调优化设计方案的有效性。The paper describes the in-depth research on important application of QPSK modulation in satel- lite system, and points out the difficulties and insufficiency faced in the field of satellite digital demodula- tion, and discusses the traditional design of digital demodulation scheme, for the purpose to improve the project implementation capability of broadband digital signal demodulation of satellite link, and based on the optimized design is proposed. Firstly, the simulation and verification are done on the optimized match - filter and costas loop. Then according to the FPGA project implementation, the comparisons are done on the hardware resource utilizations of the traditional digital demodulation scheme and the optimized design scheme. Finally, with optimized design as the model, simulation and comparison are done on demodulation performance of actual engineering implementation and theoretical demodulation, and these indicate the ef- fectiveness and practicability of the optimal design of QPSK demodulation.

关 键 词：QPSK解调 科斯塔斯环 匹配滤波 卫星链路 

分 类 号：TN918[电子电信—通信与信息系统]