Beamforming in the presence of correlated arrivals using structured correlation matrix
Beamforming in the presence of correlated arrivals using structured correlation matrix
复制标题
使用结构化相关矩阵在存在相关到达的情况下进行波束形成
DOI：
10.1109/29.45613
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
L. Godara
中科院分区：
文献类型：
--
作者：
L. Godara
推导了相关到达时两个天线阵处理器输出端信噪比的表达式，研究了相关幅度和相位、阵元数、干扰源电平方向和非相关噪声电平对输出信噪比的影响。考虑的两个过程是最佳的元素空间处理器（ESP）和最佳的postbeamformer干扰消除器（PIC）。PIC通过形成两个波束并调整一个波束的权重来处理信号，而ESP则对来自所有元件的信号进行加权并调整所有权重。提出了一种对相关源进行去相关的方法，并推导出了该技术对等间距单元线阵列的去相关效果的解析表达式。数值例子。>
Expressions are derived for the SNR (signal-to-noise-ratio) at the output of two antenna array processors in the presence of correlated arrivals, and the effect on the output SNR of the magnitude and the phase of the correlation, the number of elements in the array, the direction of the level of the interference source, and the level of the uncorrelated noise is investigated. The two processes considered are the optimal element space processor (ESP) and the optimal postbeamformer interference canceller (PIC). The PIC processes the signal by forming two beams and adjusting the weights of one beam, in contrast to the ESP where the signals from all the elements are weighted and all the weights are adjusted. A method is proposed for decorrelating the correlated sources, and an analytical expression is derived to show the decorrelation effect of the proposed technique for a line array of equispaced elements. Numerical examples are included. >