Programvare for modellering og simulering av radar

A program has been developed that models different radars and runs simulations in given terrain and environment alongside a target to quantify the radar performance. An object-oriented version of Matlab has been used as the programming environment. Certain restrictions apply in the first version 1.0. However, we plan to develop an even more capable toolkit that can represent a broader set of radars with respect to processing techniques, antennas, environment models etc. The programs emphasis is on numerical simulations with stochastic variables. In this first implementation attention has been aimed at an open sea scenario where sea clutter models, their statistical distribution functions and correlation characteristics have been incorporated. The computation of atmospheric propagation factors are undertaken by using the Advanced Propagation Model (APM). The report additionally describes the program technical aspects of the code which would be aid in further development of the code and as a reference guide. For each pulse the radar beam directs its energy in different directions in a rotating radar antenna model. The antenna beam pointing as a function of time and the position of the target relative to the beam drives the simulation forward. The received signal is built from contributions representing noise, clutter and backscattered energy in the direction of the antenna from the target. Statistical variations from pulse to pulse are simulated based on given Swerling target models, clutter correlation properties, clutter distribution functions and noise statistics. Detection calculations are subject to the input settings related to MTI behavior, pulse-integration, CFAR and detection thresholds. An open sea scenario is presented where parameters and results are described. At the end a comparison with results obtained by use of default radar setup in SADM (Ship Air Defence Model) shows good agreement with the given scenario description.