UWS冲激雷达时域多普勒测速算法研究  

Study on Velocity-measuring Method of Moving-target by Time-domain Doppler in UWS Impulse Radar

作　　者：袁雪林[1,2] 徐哲锋[2] 张洪德[3] 张光甫[2] 袁乃昌[2] 

机构地区：[1]西北核技术研究所,西安710024 [2]国防科技大学,长沙410073 [3]重庆通信学院,重庆400035

出　　处：《信号处理》2009年第4期532-536,共5页Journal of Signal Processing

基　　金：国家高技术863项目(2007AA803506)

摘　　要：超宽谱(UWS)冲激雷达是一种新体制的无载波雷达,不能通过载波多普勒频率对目标速度进行测量,因此需要采用新的测速方式。文章首先对UWS冲激雷达时域多普勒测速原理进行了研究,并对测速精度进行分析,指出其影响因素。提高回波信号信噪比和测速精度的关键在于对动目标回波信号进行有效的相干积累,因此本文提出了回波时间预估的目标回波信号积累方法。最后,通过仿真实验表明,该方法能够很好的对回波信号进行积累,有效提高信号信噪比和测速精度。Ultra-wide Spectrum （UWS） impulse radar is a new type of radar. There isn＇ t carrier frequency in UWS impulse radar, so no Doppler frequency of carrier can be used to measure velocity of moving-target. Then, the method of time-domain Doppler velocity-measuring is pointed out, and its measurement accuracy is analyzed. To improve the SNR and measurement accuracy, coherent accumulating of echo signal is necessary, and difficult, too. In this paper, a new method, time-estimating of arrival, is put up to accu- mulate echo signals. Finally, it is shown through simulation that echo signals can be effectively accumulated by the method, then SNR and measurement accuracy is largely improved.

关 键 词：UWS冲激雷达 时域多普勒 速度测量 回波时间预估 相干积累 

分 类 号：TN95[电子电信—信号与信息处理]