摘要
提出了一种应用于地面监视的连续波雷达,使用线性调频连续波(LFMCW)波形产生和快速傅里叶变换信号处理技术进行地面运动目标检测。由于较短线性调频时间和高重复频率,目标的径向速度对测量的差频信号影响很小,因此采用多个线性调频连续波信号在各个距离门上测量径向速度。为了解决不模糊最大径向速度,提出了一种改变线性调频持续时间的方法。最后根据发射和接收信号的频差以及接收天线,也可以计算出目标距离和方位角。
This paper presents a continuous wave radar applied to ground monitoring that uses waveform generation of linear frequency modulation continuous wave （LFMCW） and signal pro- cessing techniques of fast fourier transform for ground moving target detection. Due to the short linear frequency modulation time and high repetition frequency, the radial velocity of the target has little influence on the intermediate frequency signal, therefore, the radial velocity is measured at each distance gate by using a number of linear frequency modulation continuous wave signals. In or- der to solve the maximum unambiguous radial velocity, a method changing the duration of linear frequency modulation is proposed. Finally, the target distance and azimuth angle can be calculated according to the intermediate frequency between the transmitted signals and received signals ＆ the receiving antenna.
出处
《舰船电子对抗》
2016年第4期47-51,共5页
Shipboard Electronic Countermeasure
基金
科技成果转化项目
项目编号:YZ2015123
关键词
调频连续波
差频
多普勒频率
frequency modulation continuous wave,intermediate frequency
Doppler frequency
