中文摘要：

受等效相位中心误差的影响,多输入多输出合成孔径雷达（MIMO-SAR）方位成像结果存在＂假峰＂而导致成像质量下降.基于MIMO-SAR回波模型,本文推导了等效相位中心误差的解析表达式,并定量研究其对方位成像质量的影响.分析指出周期性的二阶相位误差是等效相位中心误差的决定因素,补偿该项误差能有效克服＂假峰＂的影响.理论分析和数值试验验证了本文分析和补偿方法的有效性.

英文摘要：

Due to the equivalent phase center error,the imaging quality of the Multiple-Input Multiple-Output synthetic aperture radar（MIMO-SAR） may be degraded with a series of ＂spurious peaks＂ in the cross-range direction.Based on a proposed model of MIMO-SAR,this paper derives the analytic expressions for the equivalent phase center error,and its influence on the imaging quality is studied.It is shown that the periodical quadratic phase error is a key factor in the equivalent phase center error,and its compensation may effectively overcome the ＂spurious peaks＂. Finally, both theoretical analysis and the numerical experiments are provided to demonstrate the effectiveness of the proposed analysis and compensation methods.