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基于空时频分析的多分量跳频信号DOA估计 被引量：14

Directions of arrival estimation for multicomponent frequency-hopping 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多跳频信号波达方向(direction of arrival,DOA)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)实现多个信号的测向。首先将信号的短时傅里叶变换(short timeFourier transform,STFT)与平滑伪魏格纳-威利分布(smoothed pseudo Wigner-Ville distribution,SPWVD)组合,利用STFT的无交叉项和SPWVD的时频聚焦性性能,得到了一种切实可行、时频图清晰稳健的分布;然后在时频域提取有效跳(hop),并建立该hop的空时频矩阵,最后分别运用线性空时频、二次空时频和root-MUSIC共三种方法估计每hop信号的DOA。仿真结果验证了方法的有效性。 An algorithm of directions of arrival estimation for multicomponet frequency-hopping signals based on spatial time-frequency analysis is proposed, which can realize direction-of-arrival （DOA） estimation in underdetermined condition. First, a clear time-frequency representation is gained by short-time-Fourier-trans-form （STFT） and smoothed-pseudo-Wigner-Ville distribution （SPWVD） synthesis method, which can obtain robust results with good time-frequency concentration and suppression cross-term interference performance. Then, effective hops are selected from the time-frequency distribution, and every hop＇s spatial time-frequency matrix is built. Finally, every hop＇s DOA is estimated by three methods： linear spatial time-frequency method, bilinear spatial time-frequency method, and root-MUSIC. The simulation results demonstrate that the estimation algorithm is effective.
作者 陈利虎
机构地区 国防科学技术大学航天与材料工程学院
出处 《系统工程与电子技术》 EI CSCD 北大核心 2011年第12期2587-2592,共6页 Systems Engineering and Electronics
关键词 跳频 空时频分析 时频聚焦性 交叉项干扰 DOA估计 frequency-hopping （FH） spatial time-frequency analysis time-frequency concentration crossterm interference 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11

  • 1陈利虎,张尔扬,沈荣骏.跳频信号的时频分析[J].宇航学报,2009,30(2):740-747. 被引量：22
  • 2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
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共引文献32

同被引文献85

引证文献14

二级引证文献46

系统工程与电子技术
2011年 第12期

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