双基地高频地波SIAR通道幅相误差的自校准方法

刘春波; 陈伯孝; 陈多芳; 张守宏

doi:10.3724/SP.J.1146.2007.01659

双基地高频地波SIAR通道幅相误差的自校准方法

doi: 10.3724/SP.J.1146.2007.01659

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出版历程
- 收稿日期: 2007-10-23
- 修回日期: 2008-04-08
- 刊出日期: 2009-03-19

Self-Calibration of Channel Errors for Bistatic HF Surface Wave SIAR

摘要

摘要: 该文针对多载频阵列发射、单天线接收的双基地高频地波SIAR，分析了通道幅相误差对空时二维超分辨的影响，研究了发射通道幅相误差的自校准方法。该方法利用直达波信号，将传统自校正算法中误差参数与目标参数的联合估计，转化为先估计误差参数再超分辨估计目标参数的级联处理，大大降低了计算量和时间损耗，操作简单且易于实现。该文对影响误差参数估计的因素及因应措施也作了讨论。计算机仿真验证了所提方法的有效性。
- 双基高频地波雷达;通道校准;幅相误差;空时超分辨
Abstract: 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.

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