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针对一发三收模式下星载SAR-GMTI系统利用相位中心偏置天线(DPCA)方法进行杂波抑制时,系统误差和平台运动误差引起的杂波残留问题,提出了一种基于误差补偿的运动目标检测和定位新方法。分析了误差存在的原因,并以消除剩余杂波为目的详细推导出了相应的补偿因子,在此基础上对经过误差补偿后的数据采用DPCA方法进行杂波抑制,最后通过相位干涉处理进行动目标定位。仿真结果验证了算法的有效性。
Aiming at the problem of clutter residual caused by clutter suppression, system error and platform motion error in spaceborne SAR-GMTI system with one-to-three receiving and three receiving modes, an error compensation based A new method of moving target detection and location. The reason of the existence of the error is analyzed, and the corresponding compensation factor is deduced for the purpose of eliminating the residual clutter. On the basis of this, the DPCA method is used to suppress the clutter after the error compensated data, and finally the phase interference is used to deal with the clutter target setting. Simulation results verify the effectiveness of the algorithm.