Patent Number: 6,311,128

Title: Combined navigation and mobile communication satellite architecture

Abstract: A navigation and mobile communication satellite system including a Geo-Mobile (GEM) satellite (14) and a plurality of Global Position System (GPS) satellites (50). The GEM satellite (14) is in operative communication with at least one ground segment (12) and at least one user segment (16), and includes a GEM processor for providing communication services to the user segments (16). The GPS network is also in operative communication with at least one of the user segments (16) and at least one of the ground segments (12). The GPS network provides navigation data to the user segment (16). Each of the ground segments (12) include a gateway station (28) for receiving the navigation data and uplinking the navigation data to the GEM satellite (14) such that the navigation data is rebroadcast to the user segments (16) at a higher power than from the GPS network alone. In this manner, the GEM system provides a navigation signal at a much higher power than the present GPS system. This signal is of sufficient strength to overcome the effects of a lower power signal jammer, which may be effective against the weaker GPS signal.

Inventors: Prum; Samuel (Fullerton, CA), Bazak, Jr.; Henry V. (Palos Verdes Estates, CA), Montalvo; Armando (Woodland Hills, CA), Bennett; Pauline C. (Los Angeles, CA), Busche; Gregory C. (Manhattan Beach, CA)

Assignee: Hughes Electronics Corporation

International Classification: G01C 21/28 (20060101); G01S 1/00 (20060101); G01S 5/14 (20060101); G01C 021/00 (); G01S 013/00 (); G06G 007/00 (); G06G 017/00 (); G06G 019/00 ()

Expiration Date: 10/30/2018