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高频地波雷达(HFSWR)使用多重信号分类算法MUSIC算法估计信号源的到达角时,接收通道幅相特性的不一致会使MUSIC算法的分辨性能下降,甚至完全失效。文中针对单极子/交叉环天线提出一种基于海洋回波的相位校正方法:首先,预选出一阶谱区的大信噪比谱点;然后,结合天线三通道相位中心一致的特性进行有效谱点的筛选;最后,利用有效谱点的相位差均值估计出相位误差。将该方法应用于北部湾海域收集的实测数据处理中,验证了方法的有效性。
High Frequency Ground Wave Radar (HFSWR) When the multiple signal classification algorithm MUSIC algorithm is used to estimate the arrival angle of the signal source, the inconsistency of the amplitude and phase characteristics of the receive channel will reduce the resolution performance of the MUSIC algorithm or even completely disable it. In this paper, a phase correction method based on oceanic echo is proposed for monopole / cross-loop antenna. Firstly, a large signal-to-noise spectrum point of the first order spectral region is preselected. Then, in accordance with the consistent characteristics of the phase center of the three channels of the antenna, Finally, the phase error is estimated based on the mean phase difference of the effective spectral points. Applying this method to the measured data collected in Beibu Gulf waters, the validity of the method is verified.