Reducing Interference Effect on GPS Receiver by Using Multi-correlation Architecture

The use of Global Positioning System (GPS)  in highly automated systems is increasing day by day. Therefore, itssecurity of these systems is getting important more and more. The reliability of the obtained position by GPS is in danger by spoofing attacks. A spoofer transmits replicas of authentic satellite signals to force the victim receiver to misjudge the its position estimate. Numerousresearches have been focused on spoofing detection and mitigation in the GPS receivers. In this paper, mitigation of spoofing attack is suggested by using multi-correlator architecture associated with neural network. Spoofing signal is generated by mixing two signals which are produced by authentic GPS signal and its shifted. The results of the simulations which wasperformed in the software defined receiver, indicate the solution was effective in mitigating the spoofing attack. By studying three scenarios of spoofing, the proposed method was evaluated and the results show that the rate of reduction of deception error is 88.42% by using multi-correlation architecture.