一种基于分时发射技术的双线性间断调频准连续波雷达的研究  

A New Type Quasi-Continuous Radar Employed the Double Linearly Frequency Interrupted Modulation Signal

作　　者：刘高辉[1] 高勇[1] 

机构地区：[1]西安理工大学电子工程系,陕西西安710048

出　　处：《电子学报》2010年第3期695-699,共5页Acta Electronica Sinica

摘　　要：为解决常规线性调频雷达存在的距离速度耦合和近距离盲区等问题,提出一种采用大占空比双线性间断调频脉冲信号的准连续波体制雷达.该雷达在一个脉冲重复周期内分时交替发射频谱互不重叠的两个线性调频脉冲信号,接收机通过发射信号分离、Stretch处理、时域互相关、FFT、运动补偿等过程可以在一个脉冲重复周期内获得运动目标的速度估计值和距离估计值.本文首先给出了该雷达的信号模型和距离速度去耦合原理,分析了系统性能,最后讨论了尚需解决的关键问题.A new type quasi-continuous radar which take a double linearly frequency interrupted modulation signal with large operating duty as the transmitting wave is proposed in order to solve the range-velocity coupling problem in the LFM-CW radar and the short-range blind area problem in LFM pulse radar.In this quasi-continuous radar,two LFM signals whose spectrums are not overlapped are transmitted alternately in the transmitting pulse,and the estimated values of the range and the velocity can be obtained within a pulse repetition interval in the receiver by the separating the transmitted signals,Stretch processing,correlation processing,FFT and the motion compensating.In this paper,the signal model and the principle of range-velocity decoupling are firstly given.And then its performance is analyzed.Finally,some key problems to be solved are discussed in the radar.

关 键 词：准连续波雷达 STRETCH处理 距离速度去耦合 近距离盲区 

分 类 号：Q958.94[生物学—动物学]