Implement Method of GPS Signal Simulator′s Radio Module
Qinglong Bao · Modern Electronics Technique · 2007
For the purpose of testing the performance of GPS(Global Positioning System) receivers,a GPS signal simulator is needed which can simulate real GPS signals under all kinds of conditions.Functions of high performance GPS signal simulators in foreign countries are excellent but the key techniques are kept secret to our country and GPS signal simulators are expensive in the market.Thus,it′s very important for the construction of national defense to develop a GPS signal simulator by ourselves.This paper introduces a better implement method of a GPS signal simulator′s radio module.This method realizes frequency modulation through the method of phase shift and it has the features of easy to implement,high flexibility and high performance.