| Simulation technique is a multi-discipline in which a model is created to research, analyze, evaluate the system or participate the process of the system. Taking advantage of modern simulation techniques and digital circuit technique, radar signal simulator, by its features as economic, flexible and repeatable, has been an essential part in radar system especially on its design, development, test, teaching and training areas.The research task aimed at Radar Simulation system for Marine Navigational Radar and VTS Project is equally significant. The research on modeling working environment of Navigational Radar and Simulation technique will serve the design of radar signal simulator, and also assist the design of radar system, the improvement of signal processing and the functional simulation. From the view on serving Engineering Applications and teaching research, this paper aims at discussing the simulating method of navigational radar echo signal and some techniques of software realization in purpose of satisfying the requirement for the design of Radar signal simulator.After analyzing the target, clutter, noise of simulating method based on Radar Video Echo Signal is devised. Based on Monte Carlo method, the features of radar clutter range, Characteristic time-correlation and Spatial-Temporal Correlation are analyzed. The result makes a great practical significance on simulating of Radar Clutter and processing of Radar Signal.Based on different simulating occasions and demands, model of sea clutter power spectrum is made and distribution feature of sea clutter is analyzed. In use of ZMNL and SIRP, the clutter simulations of correlative Rayleigh Distribution, correlative LogNormal Distribution, correlative Weibull distribution and correlative K distribution are realized in case of radar Transmitting Waveform with regular impulse. And some space correlative features related to distributed clutter are studied.According to target feature of Marine Navigational Radar, model of radar target... |
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