摘要
在基于特征值分解的MUSIC算法的基础上,从另一个角度出发,通过特殊的天线阵列模型,重构一个Toeplitz矩阵,使其秩只与信号的波达方向有关,而不受信号相关性的影响,从而达到去相关的目的,并对信号子空间和噪声子空间作出正确的估计;同时从理论上推导出天线距离大于信号源载频波长的一半时产生多值模糊的原因,并给出了多值之间的数学关系公式。仿真结果验证了该方法的有效性。
On the basis of the MUSIC algorithm, this paper reconstructs a Toeplitz matrix using a special antenna array model, so that its rank is only related to the DOA of the signals and is not affected by the coherency between the signals, therefore the signals subspace and the noise subspace can be estimated properly. The cause of blur of multiple value when the distance of antenna is longer than half the wavelength of carrier frequency is deduced in theory, and the mathematical formula between multiple values is given. The computer simulation shows that the method is effective.
出处
《电子科技》
2007年第9期37-40,共4页
Electronic Science and Technology
