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基于空时频分析的多FH/DS信号DOA估计 被引量：5

Directions of Arrival Estimation for Multicomponent Frequency-Hopping/Direct Sequence Spread Spectrum Signals Based on Spatial Time-Frequency Analysis
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摘要 提出了一种基于空时频分析的跳频/直扩(Frequency Hopping & Direct Sequence,FH/DS)信号的波达方向(DOA,Direction of Arrival)估计方法,该方法能够在欠定条件下(传感器数目小于信号数目)实现多个FH/DS信号的精确测向。首先对每个阵元的数据进行时频变换,得到全景时频图;再在时频域提取有效hop,并根据各阵元的时频值建立每点的空时频矩阵;最后分别运用基于线性空时频方法和二次空时频方法估计每hop信号的DOA。仿真结果验证了方法的有效性。 An algorithm of DOA estimation for multicomponet FH/DS signals based on spatial time-frequency analysis is proposed, which can realize exact DOA estimation in underdetermined condition. First, a clear time-frequency representation is gained by time-frequency distribution（STFD）. Second, effective hops are selected from the time-frequency distributions, and every time-frequency-dot＇ s spatial time-frequency matrix is built. At last every hop＇ s DOA is estimated based on linear STFD method or bilinear STFD. The simulation results demonstrate that the estimation algorithm is effective and efficient.
作者 陈利虎 王永明 张尔扬
机构地区 国防科学技术大学电子科学与工程学院
出处 《信号处理》 CSCD 北大核心 2009年第8期1309-1313,共5页 Journal of Signal Processing
关键词 跳频/直扩 空时频分析 DOA估计 FH/DS spatial time-frequency analysis DOA estimation
分类号 TN911.1 [电子电信—通信与信息系统]
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参考文献8

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二级参考文献1

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共引文献7

同被引文献34

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  • 10陈利虎,张尔扬.基于数字信道化和空时频分析的多网台跳频信号DOA估计[J].通信学报,2009,30(10):68-74. 被引量：14

引证文献5

二级引证文献24

信号处理
2009年 第8期

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