一种高速跳频信号跳时钟恢复方法  

A Method of Hopping Clock Recovery for High-speed FH Signals

作　　者：屈超[1] 

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

出　　处：《无线电通信技术》2013年第4期67-69,共3页Radio Communications Technology

摘　　要：针对非合作环境下高速跳频信号的特点,提出了一种跳时钟恢复方法,为对抗中的跟踪干扰提供了前提条件。该方法在处理中使用了高速采样并行处理、频域检测估计信号载频、多相正交下变频抽取滤波、双滑窗检测能量跳变与锁相跟踪等方法,算法结构简单,便于在FPGA上实现。结合仿真详细描述了信号检测和跳时钟恢复的工作原理,对算法中的关键技术进行了分析,经过实际验证表明本方法稳定可靠。Aiming at the characteristics of high-speed FH signals in uncooperative environment,a method of hopping clock recovery is presented in this paper,which provides the precondition for following-jamming.Many algorithms are used in the processing： highspeed sampling data parallel processing,carrier frequency estimating on frequency domain,quadrature down-conversion and decimation filter on polyphase structure,hopping energy detecting by double sliding windows algorithm and phase-locked loops.The structure of method is simple and easy to realize on FPGA.The principle of signal detection and hopping clock recovery is described in detail with simulation and the key technology of algorithm is analyzed in the paper.The practical experiment results show that this method is stable and fiable.

关 键 词：跳频 FFT 信号检测 跟踪 

分 类 号：TN975[电子电信—信号与信息处理]