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建立了均匀圆阵测向系统模型,在其基础上利用模式空间变换方法将均匀圆阵转化为虚拟均匀线阵,使得ESPRIT算法得以应用,从而实现二维无源测向。为验证算法的可行性及可靠性,搭建了七元均匀圆阵实测系统。实验结果表明,该算法所用时间较短,且测向结果较为稳定,可应用于均匀圆阵无源测向系统。
The uniform circular array direction finding system model is established. Based on the model, a uniform circular array is transformed into a virtual uniform linear array by using the mode space transformation method, so that the ESPRIT algorithm can be applied to realize the two-dimensional passive direction finding. In order to verify the feasibility and reliability of the algorithm, a seven-element uniform circular array measurement system was set up. The experimental results show that the proposed algorithm has a short time and the results of the DF are stable and can be applied to a uniform circular array passive DF system.