数字波束形成中的接收通道校正技术研究

Research on Calibration Method for Receiving Channel in DBF

数字波束形成(DBF)技术是在原来模拟波束形成原理的基础上,引入数字信号处理方法之后建立的一门雷达新技术,而接收通道的幅相一致性即接收通道校正是影响波束形成性能的重要因素。介绍了通道均衡的原理和算法以及工程实现方法,并结合实例讨论了一种在工程实现中的接收通道校正方法,此方法只利用测试信号而不借助于远场信号来实现接收通道的校正,从而使得应用了数字波束形成技术的雷达降低了使用和操作上的复杂程度,具有极高的实用价值。

DBF technology is a new radar technology based on the principle of analog beam forming and ditigal signal processing method. The equalization of amplitude and phase in receiving channels is a very important factor that influence the performance of DBF. The principle of channel equalization,its algorithm and implementing method is described in this paper. With engineering illustrations, an implementing method of receiving channel calibration is discussed. This method uses testing signal instead of far field signal to complete receiving channel calibration. So the radar based on the technology of DBF is not only easy to use, but also has very high practical value.