A Deceptive Interference Cancellation for GNSS Receiver with Small Forwarding Delay

The retransmitted GNSS deception signal is a common deception jamming method. When the retransmission delay is less than 1.5 code chips, the correlation peaks of the deception signal and the real signal are overlapped, which makes the receiver unable to capture and track the real signal. To solve this problem, this paper studies the adaptive cancellation method of GNSS deception signal which can be used for small forwarding delay, and designs a closed-loop estimation method of deception signal amplitude, which can realize the adaptive cancellation of deception signal. The analysis and simulation results show that when the delay of forwarding is less than 1.5 chips, the method in this paper can realize the adaptive cancellation of the deception signal, so as to eliminate the influence of the deception signal on the real signal and ensure the small distortion of the real signal.