Robust Anti-jamming Algorithm Based on New Navigation Signal

Transmit/receive (T /R) time-sharing is the critical technology to guarantee precise space-time reference information for new navigation signals. It solves the co-frequency interference between the receiver and transmitter on navigation signals. The rapid development of electronic information industries has led to severe frequency band conflicts among different systems, resulting in the crucial unintended narrowband interference (NBI) to navigation receivers. Time-domain anti-jamming is one of the commonly used NBI suppression technology, which can guarantee the effectiveness and robustness of new navigation signals. The new navigation signal carries out the bidirectional measurement and communication function by the new signal structure of T /R time-sharing. The conventional navigation receiver's anti-jamming filter generally reconverges from the initial condition in every receiving interval, which causes new navigation signals to lose data owning to the repetitive convergence. This paper proposes a robust anti-jamming technology based on the new navigation signal, which utilizes the interference characteristics of persistence and stability to obtain the prior information for periodic T /R time-sharing. The results show that the robust anti-jamming technology based on T/R time-sharing navigation signals can effectively improve the data loss caused by the conventional time-domain anti-jamming technology and reduce the convergence time to the nanosecond level.