摘要
针对调频连续波合成孔径雷达系统误差提取和校正困难的问题,提出了一种基于数字接收机的调频连续波合成孔径雷达系统方案。分析了去调频接收模式下调频连续波合成孔径雷达的回波特性,研究了系统误差对回波信号的影响,推导了在数字时域对回波信号进行正交解调、去调频接收处理以及系统误差提取的实现过程。数字接收处理的方法可以简单有效地提取系统的幅相误差,并进行校正。最后,通过实验仿真证明了该方法的有效性和正确性。
To slove the calibration of problem of system errors in frequency modulated continous wave（FMCW） SAR, a system scheme based on the digital receiver for FMCW SAR is proposed. The characteristics of radar echoes on de-chirped receiving mode for FMCW SAR are analyzed, and the impact of system errors in FMCW SAR is investigated, then the realization process of quadrature demodulation and de-chirping for radar echoes in digital time domain is formulated. With the digital signal processing method, the system errors can be calibrated easily and effectively. Finally, the performance of the method is demonstrated by the simulation.
出处
《数据采集与处理》
CSCD
北大核心
2009年第B10期69-73,共5页
Journal of Data Acquisition and Processing
关键词
合成孔径雷达
调频连续波
正交解调
去调频
synthetic aperture radar（SAR）
frequency modulated continuous wave（FMCW）
quadrature demodulation
de-chirp
