CAJ | 학술논문

在多天线系统中可以利用 MUSIC 算法估计来波方向,但当在相关信源、非静态噪声功率及较低信噪比的环境下,该算法分辨特性较差.为了解决以上问题,提出一种重构矩阵算法,通过组合新的满秩协方差矩阵来构建信号子空间和噪声子空间,从而避免了相关信源协方差矩阵降秩和空间谱漏谱.仿真表明,该方法在强相关信号源和非静态噪声的情况下能检测到全部来波信号.
재다천선계통중가이이용 MUSIC 산법고계래파방향,단당재상관신원、비정태조성공솔급교저신조비적배경하,해산법분변특성교차.위료해결이상문제,제출일충중구구진산법,통과조합신적만질협방차구진래구건신호자공간화조성자공간,종이피면료상관신원협방차구진강질화공간보루보.방진표명,해방법재강상관신호원화비정태조성적정황하능검측도전부래파신호.
In a multi?antenna system,a MUSIC algorithm estimates the direction?of?arrival of coherent signals. While in the case of strong coherent sources,non?static noise and low SNR,the resolution performance of the algorithm is poor. To solve the problem,a matrix reconstruction algorithm is proposed. A new signal subspace and a noise subspace are established by combin?ing a full rank covariance matrix,which avoids the source covariance matrix related to reduced rank and space frequency spec?trum leakage. The simulation demonstrates that the proposed algorithm can detect all the incoming wave signals under the condi?tion of strong coherent sources and nonstationary noise fields.