CAJ | 학술논문

空间信源数检测是阵列信号处理的关键问题之一,常用的信源数检测算法需要计算采样协方差矩阵的特征值,该文提出一种基于改进Hung-Turner投影的多目标信源数快速检测算法,该算法根据采样协方差矩阵估计误差的渐进分布特性确定一个判断门限,利用该门限实现GS正交化次数的自动确定,从而完成对信源数的检测.该算法无需对采样协方差矩阵的特征值分解运算,计算复杂度低,检测性能好,计算机仿真证明了算法的正确性和有效性.
공간신원수검측시진렬신호처리적관건문제지일,상용적신원수검측산법수요계산채양협방차구진적특정치,해문제출일충기우개진Hung-Turner투영적다목표신원수쾌속검측산법,해산법근거채양협방차구진고계오차적점진분포특성학정일개판단문한,이용해문한실현GS정교화차수적자동학정,종이완성대신원수적검측.해산법무수대채양협방차구진적특정치분해운산,계산복잡도저,검측성능호,계산궤방진증명료산법적정학성화유효성.
Detection of the number of spatial signals is one of the key issues in array signal processing community. Most of the existing methods for detection of the number of signal sources require the eigenvalues of the sample covariance matrix. In this paper, a Fast Detection Method via Modified Hung-Turner Projection (FDM-MHTP) is proposed to dectect the number of multiple emitters, where a threshold is derived exploiting the asymptotic distribution properties of the estimation errors of the sample covariance matrix. The threshold is utilized to detect the number of signal sources in conjunction with performing Gram-Schmidt(GS) orthogonalization. Without eigenvalue decomposition, the algorithm has good detection performance and low computation complexity. Computer simulation shows the correctness and efficiency of the algorithm.