针对平面阵测向中存在的相位模糊问题,提出一种基于平行基线的干涉仪测向算法。该算法利用平行基线中短基线相位差可能的模糊数获得长基线的一系列可能相位差,通过相关运算实现解模糊,并利用最小二乘解确定最终的入射信号方向。算法中引入的平行基线有效降低了解模糊运算量,而最小二乘解则提高了算法测向精度。计算机仿真结果验证了算法解相位模糊的正确性和测向的高效性。

An interferometer direction finding algorithm based on parallel baselines is proposed for the DOA estimation of plane array with phase ambiguity. A series of possible phase difference of the long baselines are obtained through the ambiguity values of phase difference corresponding to the short baselines in parallel baselines. The ambiguity of measured phase difference is solved by correlation and the DOA is finally given by the Least Square (LS) method. The parallel baselines introduced in the algorithm significantly reduce the computation while the LS increase the accuracy of DOA estimation. Computer simulation verifies the correctness and effectiveness of proposed algorithm in both solving phase ambiguity and direction estimation.

中央高校基本业务费项目;国家自然科学基金项目