基于合成虚拟阵列的脉冲多普勒引信高分辨DOA 估计方法

A DOA method based on synthetic virtual array is proposed to achieve a high direction-of-arrival(DOA) resolution forpulse Doppler(PD) fuze. Taking advantage of the motion characteristics of PD fuze, a largervirtual aperture array can be formed by combining the target echoes data at different moments. In order to solve the problem of high computational complexity caused by the non-uniformity of synthetic virtual array, the synthetic virtual array is decomposed into original subarray and moving subarray. After DBF processing, the wave beams of two subarrays is used to replace the wave beam the synthetic virtual array, which not only obtains the high angle resolution, but also reduces the complexity of direct DBF operation of synthetic virtual array. The simulated and experimental results show that the proposed method can be used to improvethe DOA resolution of PD fuze under the condition of fewer array elements.