The Research Of Marine Navigation Radar Video Signal Processing System

With the rapid development of science and technology, Marine radar field graduallychanges into digital, intelligent direction; Development of marine navigation radar videosignal processing technology has become more and more industry leaders of all ages. Sincemarine navigation radar has developed, it has become one of the ships’ indispensablenavigation and collision avoidance equipments, which has a significant meaning to theprotection of the safe navigation of the ship. Signals radar transponder receives can bedisplayed on the computer only processed by radar video signal processing system, therefore,the radar video signal processing system plays a more critical role in the maritime radar.The main work of radar video signal processing system is to process video signals fromtransceivers, relative to other signal processing systems based on hardware and software, weuse the whole software system for processing. On this basis, the paper focuses on studying theradar video signal processing system combine unit, anti-noise, video accumulation and goalsbroadening, sweep relevant and real-time coordinate conversion modules. In unit mergemodule, this paper presents the combined interpolation method and usage rights divisionmultiplexing; In coordinate real-time conversion module, this paper presents a new approach-look-up table incremental method, to create a two-dimensional array whose indexes areazimuth and distance in polar coordinates and whose content is composed of correspondingrectangular coordinate points. This will not only increase the speed of operation, but alsoensure the accuracy of the radar display system.The test results show that each module algorithm of the radar video signal processing canincrease the speed of operation, and meet the requirements of high accuracy of the display.Using software technology to achieve radar video signal processing, which reduces productcosts, more suitable for small and medium sized radar users. Research of radar videoprocessing technology has laid a more solid foundation for the development and applicationof navigation radar.