欢迎访问《电讯技术》编辑部网站！

首页 期刊简介编委会征稿启事出版道德声明审稿流程读者订阅论文查重联系我们English

引用本文：

吴团锋,徐友云,归琳,等.Turbo编码GMSK信号的多普勒频移捕获与跟踪[J].电讯技术，2011，51（8）： - . [点击复制]
WU Tuan-feng,XU You-yun,GUI Lin,et al.Doppler Frequency Shift Acquisition and Tracking for Turbo Coded GMSK Signals[J].，2011，51（8）： - . [点击复制]

本文已被：浏览 1892次下载 1744次	码上扫一扫！
Turbo编码GMSK信号的多普勒频移捕获与跟踪
吴团锋,徐友云,归琳,马文峰
0 字体:加大+\|默认\|缩小-
(上海交通大学无线通信技术研究所，上海 200240;解放军理工大学通信工程学院，南京 210007)

摘要:

提出了Turbo编码GMSK信号的多普勒频移捕获和跟踪方案。该方案首先采用AR模型进行多普勒频移的初始捕获，其次采用基于FFT 的联合帧同步和频偏估计算法捕获剩余频差，最后利用判决反馈PLL跟踪多普勒频移的变化。仿真结果表明：该算法在低信噪比时可快速捕获超过符号速率的多普勒频移，并能以很小的误差跟踪多普勒频移的变化，此时解调器误码率性能恶化量较小。

关键词: 卫星移动通信 GMSK Turbo码多普勒频移 AR模型判决反馈PLL环

DOI：

基金项目:国家自然科学基金资助项目(60625103,60902018)；上海市数字媒体处理与传输重点实验室资助项目

Doppler Frequency Shift Acquisition and Tracking for Turbo Coded GMSK Signals

WU Tuan-feng,XU You-yun,GUI Lin,MA Wen-feng

(Institute of Wireless Communications Technology, Shanghai Jiaotong University ,Shanghai 200240,China;Institute of Communications Engineering,PLA Unive rsity of Science and Technology,Nanjing 210007,China)

Abstract:

A new algorithm of Doppler frequency shift acquisition and tracking for Turbo coded GMSK signals is presented. The signal is captured by AR model and F FT based frame synchronization algorithm. The decision-feedback PLL is employed to track Doppler frequency shift. Simulation results show that the algorithm can capture and track the signal with the frequency shift larger than the symbol ra te under low Eb/N0, while the amount of demodulation bit error r ate(BER) performance degradation is small.

Key words: satellite mobile communication GMSK Turbo code Doppler frequency shift AR model decision feedback PL L