摘要
提出了基于空问聚焦的宽带信号到达角(DOA)估计算法。该算法利用对称阵子和双线性变换可将多个宽带信号聚焦至各自的瞬时频率,再通过傅立叶变换,在信号各自的瞬时频率上构造相关矩阵,由此构造MUSIC空间谱可获得信号的DOA。分析了阵元通道幅相不一致对算法的影响,并给出了基于相关矩阵Toeplitz性的校正算法。计算机仿真结果表明算法的正确性。
To estimate the direction-of-arrival （DOA） of wideband signals, the method with spatial focusing is presented. Firstly, the wideband signals are focused on the instantaneous frequency respectively with symmetric antenna and bi-linear transformation. Secondly, the correlation matrices are constructed on the signals＇ instantaneous frequency. With MUSIC spatial spectrum, the DOAs will be obtained at last. The effects of the sensor gain and phase uncertainties are discussed. A technique for calibration which is based on the Toeplization of correlation matrices under the uniform linear array is introduced. The computer simulations demonstrate the correctness of the analysis.
出处
《信号处理》
CSCD
北大核心
2006年第2期149-152,共4页
Journal of Signal Processing
基金
国防预研项目资助(41101030103)
关键词
到达角估计
空间聚焦
幅相不一致
direction-of-arrival estimation
spatial focusing
sensor gain and phase uncertainties
