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http://dx.doi.org/10.6109/jkiice.2012.16.7.1344

Analysis of Radio Interference for Korean NDGPS Reference Station using Medium Frequency Band  

Kim, Young-Wan (군산대학교 전파공학과)
Jee, Seok-Keun (군산대학교 전파공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.16, no.7, 2012 , pp. 1344-1349 More about this Journal
Abstract
The Korean DGPS station transmits the 200 bps GPS enhancement signal using the MSK modulation in frequency range of 283.5 kHz to 325 kHz. The land-based stations of 6 sites provide the service area of 80 km with the output power of 500 W. The ocean-based stations of 11 sites provide the output power of 300 W, which provide the DGPS service to 185 kM. Some places are serviced from two or three DGPS stations. The interferences among the DGPS stations using the high power can be occurred. Also, the performances of the user terminasl in dual service area can be degraded. In this paper, the protection ratios for the DGPS service are defined. Using the MF wave propagation model, the interferences among the DGPS stations and the adjacent wireless ground stations are analyzed. Also, the performances of DGPS user terminals are analyzed in the viewpoint of interference.
Keywords
GPS augmentation system; DGPS interference; DGPS interference protection ratio;
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