关键词: 合成孔径雷达, 杂波, 通道均衡, 地面动目标检测, 定位

Abstract: For an airborne multi-channel SAR-GMTI system and its real data, a novel channel equalization method is presented, on the basis of which a technique for moving target detection(MTD) and location is proposed. This method first realizes circuits calibration by utilizing the leaking signals, and then implements fast and slow time calibration and compensates the channel differences via iteration after range compression, after which MTD is realized by clutter cancellation and imaging and target parameters are obtained by estimating the moving target doppler shift. The channel equalization method needs no priori knowledge about the parameters of antenna and the plane’s movement, and avoids image registration and auto adaptive clutter cancellation method. Thus it requires less computation and it is easy to realize. The experimental result of real data proves that the method can achieve a clutter cancellation ratio of more than 20dB, and that it has a good detection ＆ location performance.

Key words: synthetic aperture radar, clutter, channel equalization, ground moving target indication, location