【作者】 岳三创；

【导师】 刘书明； 蔡兴雨；

【作者基本信息】 西安电子科技大学 ， 电子与通信工程， 2006， 硕士

【摘要】 现代雷达由于其良好的性能和灵活的处理功能,获得广泛的应用。本文紧密结合目前西安电子工程研究所研制的新型低空三坐标搜索雷达信号处理器,以原来的所里的二维低空搜索雷达为基础,增加了高度指示功能,对精确探测低空巡航导弹有着非常重要的意义。本文首先详细描述脉冲积累和恒虚警这两方面的基本理论,在脉冲积累方面:讲述脉冲积累的基本概念和它对信号检测的影响,主要讨论了脉冲积累的两种方法即视频积累和二进制积累,分析滑窗检测器导致目标分裂的原因;在恒虚警率方面主要介绍固定门限恒虚警、自适应恒虚警和非参量恒虚警。其次介绍多目标处理,主要包括相关波门的形状和尺寸、航迹相关处理、点迹的凝聚方法。在工程实现方面详细叙述了MTI、数字脉冲压缩,恒虚警处理和信号检测等方面的工作原理和实现方法,对系统所使用的软硬件进行简单介绍。最后对全文工作进行总结,并提出了下一步设想。更多还原

【Abstract】 Modern radars are widely used because of their good performance and flexible processing ability. This thesis is written based on the newly low altitude three-dimensional searching radar signal processor developed by Xi’an Electronic Engineering Research Institute, which adds the height indication function on the basis of former two-dimensional low altitude searching radar, thus it possesses very importance meaning for accurately detecting low altitude cruise missile. Firstly, two basic theories in radar field will be discussed: pulse integration and constant false alarm rate (CAFR). The basic concepts of pulse integration and its effect on the signal detection will be described for pulse integration, which mainly discuss two types of pulse integration, i.e. video integration and the binary integration, and analysis the reason why slide-window detectors could cause target splitting. The fixed threshold CFAR, self-adaptive CFAR and nonparametric CAFR are mainly introduced for CAFR. Secondly, the multi-target processing is introduced, including shape and size of correlation gate, relative processing of flight path and condensation method of plot. In this thesis, the working principle and realization of moving target indication, digital pulse compression, CFAR processing and signal detection are presented for engineering achievement, and software and hardware used in the system are also briefly introduced in this thesis. Finally, we conclude the work in the thesis and put forward the future development.更多还原