Analysis of GNSS interference localization techniques

When GNSS is subjected to radio frequency interference (RFI), the performance of GNSS is very easy to decline sharply or even fail to work. Reducing the system vulnerability is still a realistic demand and an important direction of development. In recent years, interference localization, as a direct elimination method of anti-interference, has been rapidly developed in means and performance, and has been increasingly paid attention to and widely used. For suppression interference sources, the principles and characteristics of interference localization techniques are summarized and analyzed in depth in this paper. The techniques are classified into three categories: propagation parameter measurement, azimuth direction finding and direct positioning. The advantages and disadvantages of these methods and their application scenarios are compared and summarized.