相控阵雷达反演口径分布中的运动补偿

目标的径向运动对时序Ｗａｌｓｈ－Ｈａｄａｍａｒｄ相位权重反演相控阵雷达的口径幅相分布会产生影响，这一影响可以通过运动补偿的方法消除。运动补偿方法需要先测出目标的多普勒频率，由于目标运动对相控阵天线输出信号的影响是使该输出信号的相位产生偏移。这个偏移可以由多普勒频率计算得到，从而可以求解出经过运动补偿后的口径分布。多普勒频率的测频精度愈高，反演口径分布的误差愈小。数值仿真表明，１Ｈｚ的测频精度已足以

Motion compensation for aperture distribution reconstruction of phased array antenna

Azimuth super resolution for phased array radar can be achieved by reconstructing the complex distribution on the antenna aperture. Because of the time sequence of the Walsh Hadamard phase weighting, the movement of the radar targets will affect the reconstructed complex distribution. A motion compensation method is presented,in this paper. The method requires the measurement of the number of the targets and their corresponding Doppler frequencies. The phase shifts of the outputs of the phased array antenna may be obtained from the Doppler frequencies. With these phase shifts, the complex distribution involves the motion compensation may be found out. The higher accuracy of measuring the Doppler frequencies, the less error of the aperture distribution. It is seen that the accuracy of 1Hz is enough for the requirement of the aperture distribution reconstruction.