基于自混频的多跳频信号跳周期估计  

Hop duration estimation method based on self-mixing of multiple frequency-hopping signals

作　　者：程曙晖 王斌[1] 

机构地区：[1]信息工程大学信息系统工程学院,河南郑州450002

出　　处：《太赫兹科学与电子信息学报》2014年第4期518-526,共9页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(61201381)

摘　　要：针对跳频信号参数估计方法大多难以适应多跳频信号同时存在,且没有考虑信道衰落及定频干扰等复杂电磁环境的影响,提出一种基于延时自混频的多跳频信号跳周期估计方法。该方法通过延时自混频方式构造辅助信号,提取辅助信号的直流分量,进而得到随延迟时间变化的能量曲线,最后通过拐点检测的相关方法得到各跳频信号的跳周期,同时分析了在定频干扰和多径衰落下算法的有效性。仿真实验表明,该方法运算复杂度低,跳周期估计精确度高,鲁棒性较强,可用于估计多跳频信号的跳周期,适合实际工程应用。Most-of-previous-parameter-estimation-methods-of-frequency-hopping-signal-with-a-single-channel-do-not-adapt-to-multiple-signals,and-they-do-not-take-some-influence-factors-like-multipath-fading-and-fixed-frequency-interference-into-account.-A-hop-duration-estimation-method-based-on-delay-self-mixing-is-proposed.-First,auxiliary-signal-by-delay-self-mixing-is-structured,then-the-DC(Direct-Current)-component-is-extracted,and-a-curve-changing-with-the-delay-time-is-obtained.-The-hop-duration-can-be-estimated-by-extracting-the-inflections.-The-effectiveness-of-the-proposed-method-is-analyzed-under-the-multipath-fading-and-fixed-frequency-interference.-Simulation-results-show-that-the-proposed-algorithm-is-featured-with-low-computation-complexity-and-high-accuracy-in-estimating-the-hop-duration,-which-is-robust-to-deal-with-multiple-hopping-signals-and-is-suitable-to-practical-applications.

关 键 词：跳频信号 自混频 跳周期 拐点检测 

分 类 号：TN914.41[电子电信—通信与信息系统]