公开(公告)号：US5047778A

公开(公告)日：1991-09-10

申请号：US596865

申请日：1990-10-11

申请人： David H. Cofield ,  John A. Moren

发明人： David H. Cofield ,  John A. Moren

IPC分类号： G01S13/34 ,  G01S13/70

CPC分类号： G01S13/34 ,  G01S13/70

摘要： A range tracking technique for producing a ground return signal in an FMCW radar system. The radar system produces an IF signal having frequencies within a range extent band, the IF signal including a ground return component having frequencies in a narrower ground return band. The range tracker includes a tracking system, a search system, and a controller. The tracking system receives the IF signal and a track control signal, and bandpass filters the IF signal to produce the ground return signal. The search system also receives the IF signal, together with a search control signal from the controller. The search system includes a second bandpass filter for bandpass filtering the IF signal to produce a band power signal. The controller receives and stores samples of the band power signal, and identifies the ground return component. The location of the ground return is used to adjust the track control signal, to keep the first passband centered on the ground return.

摘要翻译： 用于在FMCW雷达系统中产生接地返回信号的距离跟踪技术。 雷达系统产生具有范围范围频带内的频率的IF信号，该IF信号包括具有较窄接地返回频带的频率的接地返回分量。 范围跟踪器包括跟踪系统，搜索系统和控制器。 跟踪系统接收IF信号和轨道控制信号，并对IF信号进行带通滤波以产生接地返回信号。 搜索系统还接收来自控制器的搜索控制信号的IF信号。 搜索系统包括用于对IF信号进行带通滤波以产生频带功率信号的第二带通滤波器。 控制器接收并存储频带功率信号的样本，并识别接地返回分量。 接地回路的位置用于调整轨道控制信号，以保持第一个通带以地面返回为中心。