Self-Calibration of Channel Errors for Bistatic HF Surface Wave SIAR
双基地高频地波SIAR通道幅相误差的自校准方法

To calibrate the channel errors with gain and phase uncertainty for bistatic HF surface wave Synthesis Impulse and Aperture Radar (SIAR), a self-calibration approach for evaluating the gain-phase errors is presented in this paper. The impact of channel errors on spatial-temporal super-resolution is firstly analyzed. Using the direct wave of high Signal-to-Noise Ratio (SNR), the method conducts the estimation of the gain-phase matrix prior to that of range and angle, instead of the conventional joint-estimation. So the method has a small amount of computation and is easy to be implemented. Some influential factors are discussed as well in the paper. The numerical simulations show the validity of the proposed method.