Control Software Design Of Satellite Navigation Signal Simulator

Satellite navigation signal by setting the carrier trajectory simulator can accuratelysimulate the satellite navigation signal carrier received under the set scene. Satellitenavigation signal performance simulator can fully test a variety of receivers, including theacquisition, tracking and measurement accuracy. Along with the rapid development of thenavigation signal simulator, the importance of the simulator control software increasinglyprominent. In this paper, a closed-loop-the-loop simulation system for satellite navigationsignal simulator application background, the overall architecture of the simulator controlsoftware, the carrier trajectory and functional development of the mathematical model, andmany carried out a detailed study.First, from the simulator control software functional design, non-functional design,architectural design, and introduces several workflow control software system. Through a setof modules framework map outlining the control software of each module functions.Then define the motion vector associated with the three common coordinate system asECEF, geodetic coordinates and launch coordinates, and deduced the transformation matrixbetween each other. The carrier trajectory in simple scenes and complex scenes wereclassified, a mathematical model for both sports scene trajectory generation and simulation inmatlab verify the correctness of the mathematical model.Visibility calculation methods and parameters studied satellite ephemeris proposedcalculation method to extrapolate the satellite orbit position, and navigation satellites use twofitting and interpolation algorithm, obtained the position and speed of visible stars. And theclock、almanac、ephemeris error parameters and some synthetic navigation message.Finally, during the simulation of the satellite signal error model, and for the nexttrajectory complex scenes made rockets navigation signal simulation, the actual navigationsignals generated by the contrast control software tracks data received by the receiver, theresults showed that the satellite navigation signal simulator control software to meet theclosed loop-the-loop simulation system for satellite navigation signals.