Simulation And Design Of GPS Communications Interference Based On Navigation War

As the most advanced navigation and positioning system in the world nowadays, GPS is performing a revolutionary function on both martial and civilian aspects. But everything has its vulnerability, GPS has no exception, one of the vulnerability was its poor ability of anti-jamming, which has been proved in the Iraq War not long ago. We must pay attention to the vulnerability while enjoying this American high-tech. There are two purposes of my thesis: one is searching for technological measures for wining in the future battlefield; the other is offer a reference for building the navigation and positioning system of our country.The thesis introduce the construct of GPS at first, emphasize particularly on the structure and character of GPS signal, and analyse the feasibility of the GPS interference. Then use the Monte Carlo algorithm for simulating on the basis of MATLAB platform, through the modeling, programming, and set up different interfering signal parameters, consequently derive a result of measure criterion using bit error rate. Under the same condition, interference of Gold code is more effectual than CWs; the effect of interference is better in nearer and higher situation. Further more, on the basis of the simulation, investigates the total scheme of the interference transmitter and the technical index, as well as some circuitries, highlight using the frequency synthesizer on the unit of signal producing and interference transmitting. Finally, investigates the technology of produceing C/A code using FPGA.