Abstract: | Electromagnetic interference between aviation navigation systems is an important factor affecting navigation signals and the performance of navigation systems. The center frequency of a BDS B2a signal is 1176.45 MHz with a 20.46 MHz bandwidth, which overlaps with the operating frequency of the Distance Measuring Equipment (DME) ground transponder. High power jammers such as DME pulse signals can decrease the effective carrier-to-noise ratio (C/N0,eff) and cause the loss of satellite lock. Interference on the BDS B2a signal from the DME will result in C/N0,eff degradation of the airborne receiver and increase the pseudorange tracking error of the BDS B2a signal, which will increase the integrity risk. In this paper, the link budget algorithm specified by the ICAO anti-interference test in RTCA DO-292 was used to calculate the degradation of C/N0,eff caused by DME. Combined with the location of all DME stations in China, this paper divided China into 5°×5° grid regions to evaluate the degradation of C/N0,eff caused by DME in China. The results show that the effective carrier-to-noise ratio of the receiver degrades from 33.8978 dBW to 28.0637 dBW, 29.2411 dBW, and 29.9120 dBW under different receiver conditions; the pseudorange tracking error increases by up to 0.3911 m, and the average increase in the protection level is 0.88 m. |
Published in: |
Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023) September 11 - 15, 2023 Hyatt Regency Denver Denver, Colorado |
Pages: | 1890 - 1904 |
Cite this article: | Liu, Yuan, Fang, Kun, Dan, Zhiqiang, Zhu, Yanbo, Wang, Zhipeng, "Research on the Impact of DME on the Integrity of BDS B2a Signal," Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, Colorado, September 2023, pp. 1890-1904. https://doi.org/10.33012/2023.19305 |
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