Abstract
The navigation satellites are running at a high altitude of 20000 km from the ground, and the satellite signals arriving at the ground are very weak, such as the C/A code on the L1 band, which is only -160 dBW. In complex urban environments, especially when there is an occlusion, the signal power will be even lower. Low power causes the signal to be easily disturbed, where suppressed interference is the most common method of interference. The purpose of this paper is to experiment with the BPSK and BOC signal system to do the narrowband suppression of interference analysis and set up the actual test environment, based on the commonly used LMS algorithm for the two systems of narrowband interference performance contrast analysis, and throughout the simulation, it can be seen that the two improved algorithms can effectively suppress narrowband interference, thus improving the anti-interference performance of satellite navigation receiver.
Highlights
The GPS signal power reaching the surface of the earth is weak due to the distance between the satellite and the earth
The interference suppression technology can be divided into time domain suppression technology and frequency domain suppression technology: (1) the time domain interference suppression technology uses past interference value to estimate current interference value because of the strong correlation between the interference values and uses the estimated value to filter the current signal
(2) Transform domain narrowband interference suppression technology: the first signal transition time domain into frequency domain signal, half by frequency based on adaptive FFT notch filter technology, etc., to suppress the narrow-band interference in [10, 11] signal received at the receiver
Summary
The GPS signal power reaching the surface of the earth is weak due to the distance between the satellite and the earth. The essence of suppressing jamming is to use jammer to transmit interference signal with strong interference energy, which can make the real signal blurred or completely submerged, to cause the user terminal receiver cannot receive useful signals [6, 7]. The interference suppression technology can be divided into time domain suppression technology and frequency domain suppression technology: (1) the time domain interference suppression technology uses past interference value to estimate current interference value because of the strong correlation between the interference values and uses the estimated value to filter the current signal. The interference suppression technology can be divided into time domain suppression technology and frequency domain suppression technology: (1) the time domain interference suppression technology uses past interference value to estimate current interference value because of the strong correlation between the interference values and uses the estimated value to filter the current signal. (2) Transform domain narrowband interference suppression technology: the first signal transition time domain into frequency domain signal, half by frequency based on adaptive FFT notch filter technology, etc., to suppress the narrow-band interference in [10, 11] signal received at the receiver
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
