密集信号条件下的雷达信号分选

【作者】 符锐；

【导师】 李立萍；

【作者基本信息】 电子科技大学 ， 信息获取与探测技术， 2008， 硕士

【摘要】 雷达信号分选技术作为现代信息对抗领域重要发展方向之一,对雷达侦察信号处理非常重要。已经成为现代战争中极其重要的影响因素,是国内外关注的热点,具有广泛的民用和军事价值。本文主要研究雷达信号处理中雷达信号分选技术,首先介绍了雷达信号分选的研究背景、重要性以及国内外研究现状。然后再介绍了雷达信号处理原理,其中详细叙述了几种常见的雷达信号PRI表述,包括:常规雷达信号、重频参差雷达信号、重频滑变雷达信号、重频抖动雷达信号、频率捷变雷达信号。另外叙述了雷达信号处理流程,包括雷达信号预处理流程及主处理流程。此后,系统介绍雷达对抗信号源的产生原理,重点分析了产生雷达分选信号源应该考虑的参数,包括时域参数、空域参数、频域参数、脉冲幅度以及脉冲流的密度;然后研究了雷达对抗信号源的单个脉冲流的产生、干扰信号的产生以及脉冲流的合成,最后根据脉冲流形成了脉冲描述字的整个软件过程。在接下来的部分,主要研究了雷达信号PRI分选算法以及信号分选综合分析。PRI分选算法包括:相关函数法,直方图法(CDIF法、SDIF法)、PRI变换法、平面变换法以及雷达信号分选综合分析研究,内容包括雷达分选序列检索和参差雷达的鉴别。最后研究了一种基于K-MEANS多参数聚类和动态扩展关联的算法,详细论述了其算法的原理和步骤,给出仿真的结果。通过仿真试验,本文所采用的雷达信号分选算法取得了较好的分选效果。更多还原

【Abstract】 As one of the important developments of modern radar, radar signal sorting shows great strength in radar signal processing. It will be an extremely important factor of future war and is focused at home and abroad, also has a wide range of civil and military values.This paper studies in radar signal sorting technology. The background and the importance of the research have been mentioned first, together with the research situation at home and abroad. Then we introduce the theory of radar signal processing and some radar PRI expression, including: conventional radar signals, the stagger pulse signals, jittering pulse signals and frequency agility signals. The flow of radar signal processing has been listed, including the preconditioning process and the process.Next, we describe how to generate the signals. Especially we focused on the parameters, including the time, the angles, the frequency, the amplitude and the density. Then show the details of how to generate the signal pulse, the interference pulse, the combination and the pulse description word (PDW).Whereafter, PRI sorting algorithms and the comprehensive analysis are adopted and compared. PRI sorting algorithm include: correlation function algorithm, histogram algorithm (CDIF, SDIF), the PRI transformation algorithm, the radar plane transformation algorithm, and the comprehensive analysis. The last item contains the pulse extraction and the separation method of the stagger signals.Based on the multi-parameter K-MEANS clustering algorithm and dynamic association algorithm, we introduce a new algorithm. Then list the principles, the steps, the results of the simulation. From some simulation, we can get a good result.更多还原