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针对窄带观测高速自旋目标的逆合成孔径雷达成像,考虑径向运动未精确补偿情况下,利用回波时频特性对自旋目标的运动参数进行高精度估计,并提出了相干单距离Doppler干涉高分辨率二维成像方法.该算法利用相干积分的方法对目标的二维时频谱密度函数进行重构得到目标的二维分布,较原来的算法在分辨率方面有较大改进,在低信噪比条件下同样适用.仿真验证了算法的有效性和参数估计的高精度.
Aiming at narrowband observation of high speed spin target in synthetic aperture radar (SAR) imaging, considering the radial motion not accurately compensated, using the time-frequency characteristics of the echo to estimate the motion parameters of the spin target with high accuracy, and the coherent single-range Doppler interference High resolution two-dimensional imaging method.The algorithm uses the method of coherent integration to reconstruct the two-dimensional time-frequency spectral density function of the target to obtain the two-dimensional distribution of the target, compared with the original algorithm has greatly improved in resolution, The same applies when the noise ratio is in good condition.The simulation results show the effectiveness of the algorithm and the high precision of the parameter estimation.