线性调频连续波雷达信号处理算法研究与硬件实现

发布时间：2018-01-17 12:59

本文关键词：线性调频连续波雷达信号处理算法研究与硬件实现　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：线性调频连续波雷达发射线性调频信号,在去除距离速度耦合的情况下可以准确地测出目标的距离、速度等信息,具有多目标成像的能力,并且具有无距离盲区、高距离分辨率、低发射功率、结构简单等优点。线性调频连续波雷达的这些特点与现代社会对雷达的需要非常匹配,因此受到广泛的关注,其理论研究、关键技术和应用得到了迅速发展,取得的成效也越来越显著,被越来越广泛地应用到了军事与民用领域。目前,LFMCW雷达信号处理的研究热点主要集中在目标检测与参数估计、运动目标距离速度去耦合方法的研究等方面,所以对线性调频连续波雷达的研究具有非常重大的现实意义。本文首先对多周期锯齿线性调频连续波雷达的工作原理、测速测距以及解速度距离耦合的方法进行了分析与推导,并通过数据仿真进行了定量分析,同时对线性调频连续波雷达的信号处理流程与相关关键算法进行了分析研究。并在此基础上,设计出了DSP+FPGA的硬件处理平台,并对硬件平台各个模块的配置与功能进行了详细的分析。其次,根据线性调频连续波雷达的理论研究与硬件处理平台,对整个处理算法进行了功能测试,主要包括动目标显示模块,反异步干扰,动目标检测以及恒虚警检测等模块。通过对硬件模块的调试,以及信号处理算法的功能测试,表明了处理算法、硬件平台设计以及整个处理方案与流程,且各项指标都满足舰载导航雷达的设计要求与指标。
[Abstract]:LFM radar transmits LFM signals, which can accurately measure the distance and velocity of the target without the coupling of range and velocity, so it has the ability of multi-target imaging. And it has the advantages of no range blind area, high range resolution, low transmission power, simple structure and so on. These characteristics of linear frequency modulation continuous wave radar are very consistent with the needs of modern society. As a result, its theoretical research, key technologies and applications have been developed rapidly, and the results achieved have become more and more remarkable, and have been more and more widely used in military and civilian fields. The research focus of LFMCW radar signal processing is mainly focused on target detection and parameter estimation, distance and velocity decoupling methods of moving targets and so on. Therefore, the study of linear frequency modulation continuous wave radar has great practical significance. Firstly, the principle of multi-period sawtooth linear frequency modulation continuous wave radar is studied in this paper. The method of velocity ranging and velocity distance coupling is analyzed and deduced, and the quantitative analysis is carried out by data simulation. At the same time, the signal processing flow and related key algorithms of LFM CW radar are analyzed and studied. On this basis, the hardware processing platform of DSP FPGA is designed. And the configuration and function of each module of the hardware platform are analyzed in detail. Secondly, according to the theoretical research and hardware processing platform of the linear frequency modulation continuous wave radar, the whole processing algorithm is tested. Including moving target display module, anti-asynchronous interference, moving target detection and CFAR detection module. Through debugging the hardware module and signal processing algorithm function test, the processing algorithm is shown. The hardware platform design as well as the whole processing scheme and flow chart, and each index all satisfies the shipborne navigation radar design request and the target.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51

【共引文献】