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针对河流探测的超高频雷达系统,提出了一种利用河流回波信号校准阵列通道的算法.单站超高频雷达垂直于河道方向的径向流速为0m/s,其回波信号对应多普勒谱图的布拉格频点处,利用该频点可以对通道进行校准.这里研究了利用布拉格频率处的回波谱对超高频雷达系统进行通道校准的方法,实测数据处理结果表明,该方法对空间谱估计性能的改善十分明显,大幅提高了信号到达角估计的准确性.
Aiming at the ultrahigh-frequency radar system of river exploration, an algorithm to calibrate array channel by using river echo signals is proposed.The radial velocity of single-station UHF radar perpendicular to the channel direction is 0m / s, and its echo signal corresponds to more PULTR spectrum at the Bragg frequency point, the frequency channel can be used to calibrate the channel.In this paper, the use of the Echogram at Bragg frequency spectrum of the UHF radar system for channel calibration method, measured data processing results show that the method The improvement of spatial spectrum estimation performance is obvious, which improves the accuracy of signal arrival angle estimation significantly.