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阵列单元取向对DOA估计的影响
王杰
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【摘要】针对以往DOA估计算法中智能天线系统的阵列单元模型多采用全向振子的情况，分析了当天线单元存在方向性时对MUSIC算法估计信号到达角的影响，并在进行阵元互耦校正后，讨论了影响MUSIC算法分辨率的一些因素，通过计算机仿真结果的比较表明单元取向、阵列方向性、信噪比对到达角分辨率有较大的影响。
关 键 词 智能天线; 信号到达角; 分辨率; MUSIC算法
Many DOA estimation algorithms, reported in the past literature, are presented and used with the problem that the elements of smart antenna arrays are usually of no direction. The paper analyzes the influence to DOA estimation by MUSIC algorithm when the antenna elements have direction. The effect of mutual coupling is calibrated and some factors that influence the DOA resolution are analyzed. The simulation results are compared and the conclusion is reached that element direction, the direction of array and SNR have great effect on DOA resolution.
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