Interference to GPS Receivers from Mobile Satellite Emissions

Rudolph M. Kalafus

Abstract:	The expansion of satellite communications into mobile telephone services has resulted in a search for available frequency bands that support data and voice communi-cations. Unfortunately for GPS, the L1 frequency of 1575.42 MHz is located in a prime location for such services. Satellite to earth transmissions fall in the 1526- 1559 MHz communications band, while earth to satellite transmissions are now allocated in the band 1610-1660 MHz. With most desirable frequency bands already allocated, the GPS and GLONASS frequencies are coming under increasing pressure from the mobile satellite proponents seeking spectrum. In late 1997 only a last-ditch effort by GPS interests prevented these concerns from being allowed to immediately “share” the lower part of the satellite navigation band.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	827 - 832
Cite this article:	Kalafus, Rudolph M., "Interference to GPS Receivers from Mobile Satellite Emissions," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 827-832.
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