基于曼彻斯特码的抗大多普勒调制解调方法  

The Method of Anti-Doppler Modulation and Demodulation Based on Manchester Code

作　　者：唐秋菊[1] 王肇赢 刘莹[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所 [2]中国人民解放军96819部队

出　　处：《无线电工程》2017年第5期37-39,105,共4页Radio Engineering

基　　金：通信网信息传输与分发技术重点实验室基金资助项目(EX156410046)

摘　　要：针对硬件平台资源和频带受限的超视距低速通信系统在大多普勒信道条件下难以实现信号的有效解调问题,提出了一种基于曼彻斯特软译码的抗大多普勒频移的调制解调方法,该方法通过将曼彻斯特编码与差分解调联合设计,有效地降低了大多普勒频移对解调性能的影响,且工程实现较为简单。仿真及测试结果表明,在大多普勒信道条件下采用该方法时解调性能可得到明显改善。Aiming at the problems of anti-Doppler demodulation suitable for the BLOS channel under the hardware resource and bandwidth constrained environment in the low bit rate communication systems, a method of anti-Doppler demodulation based on Manchester code is proposed.This paper takes Manchester code and differential demodulation into consideration to design the seheme jointly,so that it can reduce the impact of large Doppler shift upon demodulation performance effectively.Also this method is relatively simple.The results of simulation and the experiment validate that the demodulation performanee can be improved greatly compared with the method without Manchester code.

关 键 词：曼彻斯特编码 软译码 差分解调 多普勒频移 超视距 

分 类 号：TN924[电子电信—通信与信息系统]