摘要
针对低信噪比下信号源个数估计问题,改进基于特征向量与阵列流形正交性的这种目前信号源个数估计效果很好的算法。该改进主要在于引入一个更能去噪的门限准则,结合原来的盲波束形成方法,最后得到一种基于阵列信号处理的信号源个数估计算法。仿真结果证实在低信噪比下,文中所提方法在等功率信号入射时比原方法有效,而且在不等功率信号入射时效果也比原方法好。
A modified method for estimating the signal source number at low SNR is proposed, which based on the orthogonal ability between eigenvectors and steering vectors. This method mainly brings a better criterion to eliminate noise, and with the conventional method of bind beam forming, the proposed modified method is get for estimating the number of sources based on array signal process. The result of simulation based on MATLAB shows that not only under equal power signals but also under not equal power signals, the modified method has better performances than original method, especially at low SNR.
出处
《电子信息对抗技术》
2009年第1期13-16,共4页
Electronic Information Warfare Technology
关键词
信号源个数估计
低信噪比
不等功率信号
阵列信号处理
estimation of signal source number
low SNR
not equal power signals
array signal process
