海面目标视频回波预处理方法研究  

Research into Video Echo Preprocessing Method of Sea Surface Target

作　　者：闫冯军[1] 汪永军[1] 朱德智[1] 

机构地区：[1]中国电子科技集团公司第38研究所,合肥230088

出　　处：《舰船电子对抗》2015年第6期48-51,共4页Shipboard Electronic Countermeasure

摘　　要：民用非固态船用雷达采用磁控管发射机,微波单元输出为对数视频信号。视频回波中包含了船只、岛屿、浮标和灯塔等有用信号,同时又掺杂了海浪、雨雪及同频干扰等杂波和噪声信号。为此,必须进行杂波抑制和信号检测等信号处理。主要阐述了常规信号处理技术前的视频回波预处理方法,通过综合预处理技术,最大程度地抑制了脉冲噪声,提高了检测信噪比,同时提高了目标在距离维和方位维显示的边缘饱满度,为后续的信号处理和回波显示打下了基础。通过对实际视频回波数据进行仿真分析,验证了预处理方法的有效性。本文提出的方法已成功应用于工程实现中,具有较大的实用价值。Civil shipborne radars of non-solid state adopt magnetron transmitter,and the microwave units export logarithm video signal. Video echo contains useful signals such as ships, islands, buoy and pharos, etc. , and adulterates sea clutter, rain/snow clutter, common frequency jamming and noise,therefore, signal processing of clutter restraining and signal detection must be performed. This paper mainly expatiates the video echo preproeessing method before general signal processing technology, restrains pulse noise farthest through synthetical preprocessing technology, improves noise ratio of detected signal, and raises the satiation of target edge displayed in range and azimuth dimension,which establishes the base for latter signal processing and echo display. The simulation and analysis based on actual echo data prove the validity of preprocessing method. The method proposed in this paper has been applied to engineering realization and has biggish practical value.

关 键 词：视频回波 脉冲噪声 非相参积累 

分 类 号：TN957.51[电子电信—信号与信息处理]