在应用子空间技术进行多通道合成孔径雷达(SAR)宽带噪声干扰抑制时,需要补偿不同方位时刻由雷达与干扰源相对方位变化所引起的空域导向矢量的变化,从而使噪声干扰在不同通道间具有强的相关性。通过分析噪声干扰和地面杂波子空间特征值的不同之处,说明了利用子空间技术进行宽带噪声干扰抑制的可行性,并进一步分析了空域导向矢量补偿误差对宽带噪声干扰抑制的影响,最后给出了干扰抑制滤波器。此分析对于SAR成像具有重要的现实意义和实用价值。

When using subspace technique to suppress broadband noise of multi-channel synthetic aperture radar (SAR), it is necessary to compensate the change of airspace guidance vector caused by the change of relative azimuth between radar and interference source at different time points. After the multi-channel phase error caused by the virtual process of synthetic aperture is compensated, the differences between the wide-band noise interference and the echo subspace feature values of the multi-channel SAR are analyzed, the influence of the compensation error of the space guidance vector on the interference suppression of the wide-band noise is further analyzed, and finally the interference suppression filter is given. This analysis is meaningful and useful to SAR imaging.

TN972