散射传输存在系统频偏时DPSK性能分析  

Performance Analysis of DPSK in Troposcatter Communication with System Frequency Offset

作　　者：韩明钥[1] 张金贵[1] 张玉琴[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]冀州职教中心,河北冀州053200

出　　处：《无线电通信技术》2014年第2期31-33,共3页Radio Communications Technology

基　　金：国家部委基金资助项目

摘　　要：针对低速散射传输中归一化系统频偏增大导致相干检测失效的问题,提出了DPSK差分相干解调方式,给出了其在AWGN信道下考虑载波频偏影响时的误码公式,阐述散射传输中分集接收技术的工作原理,进而分析了散射通信中存在系统频偏时的DPSK差分解调性能,最后给出了不同归一化系统频偏时的误码计算结果,并采用蒙特卡洛仿真方法进行了相应的性能仿真,验证了误码结果的正确性,为低速散射传输的系统设计及工程研制提供了参考。To solve the problem that coherence detection is invalid due to the large normalized channel fading and carrier offset,a DPSK approach is proposed. The formula of bit error rate with carrier offset in AWGN is given. The principle of diversity combining is illustrated. And the performance of DPSK with system offset in Rayleigh channel is analyzed. Finally, the performance curves are presented numerically,which is verified correctly by Monte Carlo simulation method. The result given in this paper can provide the reference for the design and manufacture of low speed troposcatter.

关 键 词：DPSK 散射 系统频偏 性能分析 

分 类 号：TN914[电子电信—通信与信息系统]