Analysis of the Influence of Different Interferences on Global Position System Positioning Accuracy

Abstract

GPS (global position system) are widely used in various industries, and navigation and positioning will also be used in railway transportation and other industries. Therefore, electromagnetic sensitivity research is important to the safety of the system. This study analyses the carrier-to-noise ratio of the receiver under different interferences, and analyzed the relationship between the carrier-to-noise ratio and the variance of pseudo-range. The pseudo-range point positioning model was established through MATLAB, and Monte Carlo simulation was performed to obtain the positioning deviation under different interferences. The results show that the equivalent carrier-to-noise ratio of the receiver decreases and the variance of pseudo range becomes larger, as the interference power continues to increase. Among the three types of interference, narrowband interference has a greater impact than the other two types of interference.