Detection Method of Radio Frequency Interference Using Raw Measurement of Multi-GNSS Receivers

Abstract

This paper focuses on the detection method of radio frequency interference (RFI) and the system using multi-GNSS receivers at current DGPS reference station. If the DGPS reference station is affected by radio frequency interference (RFI), it will not be able to perform the functionalities of DGNSS RSIM, as well as affect the quality of the pseudorange because the reference antenna cannot receive the GNSS signals correctly. Therefore, using multi-DGNSS receivers, it proposes the simple method for detecting the RFI at current DGNSS station, and shows the test results. First of all, this paper introduces the configuration and functionalities of DGNSS RSIM, and presents the limitation of integrity monitoring function, when the RFI occurred in the current DGNSS station. With the developed DGNSS software RSIM system interfaced with multi-GNSS receivers, it analyzes the raw measurement output of the receivers, and then proposes the detection method of the RFI, and finally, it summarizes the test results using a RFI simulation system. Based on the test result, it was able to verify the feasibility of RFI detection using the proposed method.