瑞利平衰落信道中跳频GMSK信号的接收  

A GMSK Receiver for Frequency-hopped System in Rayleigh Flat-fading Channel

作　　者：张力[1] 李式巨[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《电路与系统学报》2004年第2期27-30,117,共5页Journal of Circuits and Systems

摘　　要：本文提出一种瑞利平坦衰落信道中跳频方式下接收GMSK信号的方案,该方案不需要前导字之类的冗余数据来提取同步信息,具有前馈的结构,因此避免了假锁。仿真结果表明每跳要传输80比特以上,才能够完成位定时与载波同步并实时解调。本方案适合于用软件无线电实现。A scheme for receiving GMSK signal in frequency-hopped system is presented. Its performance under the Rayleigh flat-fading channel is investigated through computer simulation. The proposed algorithm is non-data aided. Therefore, it doesn't need preamble or pilot to achieve synchronization. It has a feed forward structure to guarantee free of hung-up. It is required that the length of each hop is at least 80 symbols to achieve effective timing error and frequency offset estimation as to demodulate the signal without any delay. The proposed scheme is suitable for software radio implementation.

关 键 词：跳频通信 GMSK 高斯最小频移键控 非相干解调 

分 类 号：TN911.22[电子电信—通信与信息系统]