论文部分内容阅读
一、引言在由一个给定口径天线接收到的信号中往往包含许多信息,最大限度地利用这些信息,是现代大多数雷达所追求的目标。这就需要使用能对口径场进行采样的阵列天线,以便对雷达接收的信号进行各种处理。目前正在对各种信号处理算法进行大量的理论研究,目的在于提高各方面的雷达性能。其中的一个特殊研究课题则是对掠海飞行导弹和飞机的跟踪问题,因为此时目标的直接回波和海面反射回波都能进入天线主波束,这样将会产生较大的高低角跟踪误差。为了减小这种误差,已经提出多种信号处理算法。例如,在1980～1981年间,空间滤波技术在一部X波段试验雷达上得到了验证。该雷达的
I. INTRODUCTION Many signals are often contained in the signals received by a given aperture antenna. To maximize the use of this information is the goal pursued by most modern radars. This requires the use of array antennas that can sample the aperture fields in order to perform various processing on the signals received by the radar. A great deal of theoretical research is being done on various signal processing algorithms with the aim of improving radar performance in all aspects. One of the special research topics is the tracking of skimming sea-guided missiles and airplanes, since both the target’s direct echoes and sea surface reflected echoes can enter the antenna’s main beam at this time, which will result in large elevation and low angle tracking errors . In order to reduce this error, a variety of signal processing algorithms have been proposed. For example, during 1980-1981, spatial filtering techniques were validated on an X-band test radar. The radar