Marzieh Arasteh - Faculty of Electrical EngineeringK. N. Toosi University of TechnologyTehran, Iran
Javad Kavousi
Mehrdad Ardebilipour - Faculty of Electrical EngineeringK.N. Toosi University of TechnologyTehran, Iran

The global positioning system (GPS), which is widely used in many applications around the world,consists of three basic parts which include the space segment (satellites), the control stations and thereceivers on the earth. Since the transmitted signal from the satellites has to travel a very long way toreach the earth, it’s very weak and prone to disturbance. The weakness of the received GPS signal atthe receiver, makes it to be easily blocked by the jammers with low power.In this article, we have practically transmitted three types of jammers to block the GPS signal usinguniversal software radio peripheral (USRP B۲۱۰). Then, we compared their performance in terms ofthe time to reach the unfixed state and the noise level increase. The results show that the sweepjammer compared to the barrage jammer and the spot noise jammer has the best performance fromboth points of view. It’s noise level increase in ۷۲ units in ۷.۴ seconds which outprforms the two otherjammers.

global navigation satellite system (GNSS), global navigation system (GPS), spot noisejammer, barrage jammer, sweep jammer, software defined radio (SDR)