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基于柯西分布的跳頻信號(hào)參數(shù)最大似然估計(jì)方法

金艷 李曙光 姬紅兵

金艷, 李曙光, 姬紅兵. 基于柯西分布的跳頻信號(hào)參數(shù)最大似然估計(jì)方法[J]. 電子與信息學(xué)報(bào), 2016, 38(7): 1696-1702. doi: 10.11999/JEIT151029
引用本文: 金艷, 李曙光, 姬紅兵. 基于柯西分布的跳頻信號(hào)參數(shù)最大似然估計(jì)方法[J]. 電子與信息學(xué)報(bào), 2016, 38(7): 1696-1702. doi: 10.11999/JEIT151029
JIN Yan, LI Shuguang, JI Hongbing. Maximum-likelihood Estimation for Frequency-hopping Parameters by Cauchy Distribution[J]. Journal of Electronics & Information Technology, 2016, 38(7): 1696-1702. doi: 10.11999/JEIT151029
Citation: JIN Yan, LI Shuguang, JI Hongbing. Maximum-likelihood Estimation for Frequency-hopping Parameters by Cauchy Distribution[J]. Journal of Electronics & Information Technology, 2016, 38(7): 1696-1702. doi: 10.11999/JEIT151029

基于柯西分布的跳頻信號(hào)參數(shù)最大似然估計(jì)方法

doi: 10.11999/JEIT151029
基金項(xiàng)目: 

國(guó)家自然科學(xué)基金(61201286),陜西省自然科學(xué)基金(2014JM8304),中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(K5051202013)

Maximum-likelihood Estimation for Frequency-hopping Parameters by Cauchy Distribution

Funds: 

The National Natural Science Foundation of China (61201286), The Natural Science Foundation of Shaanxi Province of China (2014JM8304), The Fundamental Research Funds for the Central Universities (K5051202013)

  • 摘要: 該文針對(duì)傳統(tǒng)的跳頻信號(hào)參數(shù)估計(jì)方法在alpha穩(wěn)定分布噪聲下性能嚴(yán)重退化的問(wèn)題,引入基于柯西分布的最大似然估計(jì)方法。將跳頻信號(hào)分解到由信號(hào)包絡(luò)參數(shù)和頻率參數(shù)構(gòu)成的2維平面,基于柯西分布建立最大似然函數(shù),在抑制alpha穩(wěn)定分布噪聲的同時(shí),直接對(duì)信號(hào)的頻率參數(shù)進(jìn)行估計(jì)。在構(gòu)建的最大似然函數(shù)基礎(chǔ)上,該方法依據(jù)跳頻信號(hào)的短時(shí)平穩(wěn)性,對(duì)信號(hào)進(jìn)行加窗,有效獲得信號(hào)的跳頻頻率及其跳變次序,進(jìn)而實(shí)現(xiàn)對(duì)信號(hào)的跳變時(shí)刻和跳頻周期等參數(shù)的估計(jì)。仿真結(jié)果表明,在alpha穩(wěn)定分布噪聲環(huán)境中,相比基于分?jǐn)?shù)低階統(tǒng)計(jì)量及基于Myriad濾波的時(shí)頻分析方法,該文所提方法提高了跳頻信號(hào)的參數(shù)估計(jì)精度,具有良好的穩(wěn)健性。
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  • 文章訪問(wèn)數(shù):  1999
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  • 被引次數(shù): 0
出版歷程
  • 收稿日期:  2015-09-10
  • 修回日期:  2016-01-29
  • 刊出日期:  2016-07-19

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