一种新型高性能跳频跟踪方法  

A New Frequency Hopping Sequence Tracking Method with High Performance

作　　者：田茂[1] 王可[1] 傅胜奇[2] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072 [2]烟台大学光电信息科学技术学院,山东烟台361005

出　　处：《武汉大学学报（理学版）》2015年第5期477-482,共6页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(41374159)

摘　　要：针对相位敏感性条件下,跳频系统跟踪精度低和稳定性差的问题,基于滞回比较器和高速数字采样器,提出了一种边沿捕获的跳频跟踪方法,利用边沿捕获模块对经过滞回比较器预处理后的信号的时间相位进行测量,并将结果处理后反馈至本振控制完成跳频跟踪.仿真结果表明,当Eb/N0大于6.5 d B时,同步误差时间的均方差在40 ns以内,归一化误差为0.32%,同步概率大于99.9%.本文方法精度和同步稳定性均优于传统的锁相环法.A new frequency hopping tracking method using hysteresis comparator and high speed digital sampler is proposed in this paper to solve the problem of the low tracking accuracy and poor stability of frequency hopping system under condition of phase sensitive. Edge-capture module measures time phase deviation of the signal which is the pretreatment by hysteretic comparator,and feeds back results to the vibration control to complete frequency hopping tracking. The simulation shows that when Eb/ N0 is more than 6. 5 d B,the mean square of time synchronization error within 40 ns,while normalized error equals 0. 32%,and the synchronization probability is over 99. 9%. The performance of edge-capture method presented in this paper is better than phase-locked loop method.

关 键 词：跳频 抗噪性能 同步概率 跳频跟踪 

分 类 号：TN914.41[电子电信—通信与信息系统]