中文摘要：

干涉SAR模拟器是构建单航过InSAR系统地面半实物仿真系统的重要地检设备，模拟器通道幅相非理想特性会影响对干涉性能的准确评估．研究了基于实时滤波校正模拟器通道幅相特性的方法：采用相关加窗处理从闭环数据中提取通道幅相特性，提出了复Remez算法和遗传算法相结合的方法设计复FIR滤波器系数，采用FPGA实现高数据率数据的实时滤波．通过实时校正将模拟器通道间幅相一致性误差峰峰值从1dB／10度量级提高至0．1dB／1度水平，半实物试验验证了本文实时校正方法的有效性．

英文摘要：

inSAR signal simulator is an important equipment in the hardware-in-loop simulation of distributed SAR,the non- ideal channel characteristic of which will affect the evaluation accuracy. The correction of channel amplitude and phase characteristic based on the real-time filtering is studied. A novel correlation and windowing method is used to extract the channel characteristic in the loop data. A method based on the complex Remez algorithm and the genetic algorithm is used to design the complex FIR coeffi- cients.Finally,a FPGA technique is used to implement the complex FIR filter. The channel mismatch peak-peak value of the simula- tor is corrected from t dB/10 degree to 0.1 dB/1 degree. The hardware-in-loop simulation validates the proposed real-time correc- tion approach.