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中文摘要：
阵列信号处理中,当阵元间距〈1/2波长时方向估计会出现模糊。文中提出一种基于最小二乘虚拟阵元的方向估计解模糊方法,该方法根据实际已知阵元的接收数据,运用最小二乘法估计出相邻阵元间虚拟阵元上的接收数据,在实际孔径不变的情况下使阵元间距减小,从而实现了方向估计的解模糊。同时,文中还对此方法在解模糊时的虚拟阵元数进行了分析。仿真实验结果表明了该方法的有效性。
英文摘要：
In array signal processing, the estimated direction gets fuzzy if the element spacing is greater than half the wavelength. This paper presents a fuzzy solution algorithm based on least squares virtual array, which uses the least squares method to estimate the received data of virtual elements between the adjacent elements based on the known receiving data of actual elements, and to reduce the spacing without change the number of array elements, thus achieving the fuzzy solution of the estimated direction. Simulation results also show the effectiveness of the method. The number of virtual element in fuzzy solution is also analyzed. Simulation results verify the feasibility of this new algorithm.
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