A new wideband interference suppression method for GNSS system

GNSS navigation system has a shortage—the satellite navigation signal is vulnerable to various interferences and thus leads to losses in performance of received signal. Wideband interference is common oppressive which impact on the receiver performance badly. In this paper, aiming at the linear frequency modulation (LFM) wideband interference, a new interference suppression method based on NEW-MDCFT is presented, and the model and implementation method of the suppression algorithm have been introduced. By adding the LFM jamming to the COMPASS B1 signal, the interference suppression method is simulated, and time domain performance, frequency domain performance, acquisition performance and tracking performance of the signal before and after interference suppression have been given. The results indicate that, the suppression method based on NEW-MDCFT has good LFM interference suppression performance and is able to perform good interference suppression in seriously-interfered environment.