# Signal design and system operation of $Globalstar^{TM}$ versus IS-95 CDMA – similarities and differences

Schiff, Leonard and Chockalingam, A (2000) Signal design and system operation of $Globalstar^{TM}$ versus IS-95 CDMA – similarities and differences. In: Wireless Networks, 6 (1). pp. 47-57.

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## Abstract

The $Globalstar^{TM}$ system provides telephone and data services to and from mobile and fixed users in the area between $\pm 70$ degrees latitude. Connection between user terminals and the PSTN is established through fixed terrestrial gateways via a constellation of low earth orbiting (LEO) satellites. Globalstar uses an extension of the IS-95 CDMA standard that is used in terrestrial digital cellular systems. The LEO satellite link is sufficiently different from the terrestrial cellular link that certain departures from IS-95 were needed both in signal design as well as in system operation. This paper describes some of the similarities and differences of Globalstar air interface versus IS-95.

Item Type: Journal Article Publisher Copyright of this article belongs to Springer. Division of Electrical Sciences > Electrical Communication Engineering 16 Oct 2008 10:28 19 Sep 2010 04:50 http://eprints.iisc.ernet.in/id/eprint/15961