太赫兹科学与电子信息学报
太赫玆科學與電子信息學報
태혁자과학여전자신식학보
Information and Electronic Engineering
2014年
4期
518-526
,共9页
跳频信号%自混频%跳周期%拐点检测
跳頻信號%自混頻%跳週期%枴點檢測
도빈신호%자혼빈%도주기%괴점검측
frequency hopping signal%self-mixing%hop duration%inflections extracting
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。
針對跳頻信號參數估計方法大多難以適應多跳頻信號同時存在,且沒有攷慮信道衰落及定頻榦擾等複雜電磁環境的影響,提齣一種基于延時自混頻的多跳頻信號跳週期估計方法。該方法通過延時自混頻方式構造輔助信號,提取輔助信號的直流分量,進而得到隨延遲時間變化的能量麯線,最後通過枴點檢測的相關方法得到各跳頻信號的跳週期,同時分析瞭在定頻榦擾和多徑衰落下算法的有效性。倣真實驗錶明,該方法運算複雜度低,跳週期估計精確度高,魯棒性較彊,可用于估計多跳頻信號的跳週期,適閤實際工程應用。
침대도빈신호삼수고계방법대다난이괄응다도빈신호동시존재,차몰유고필신도쇠락급정빈간우등복잡전자배경적영향,제출일충기우연시자혼빈적다도빈신호도주기고계방법。해방법통과연시자혼빈방식구조보조신호,제취보조신호적직류분량,진이득도수연지시간변화적능량곡선,최후통과괴점검측적상관방법득도각도빈신호적도주기,동시분석료재정빈간우화다경쇠락하산법적유효성。방진실험표명,해방법운산복잡도저,도주기고계정학도고,로봉성교강,가용우고계다도빈신호적도주기,괄합실제공정응용。
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.