Method of identifying antenna beams for transmission of ring ale

Details Method of identifying antenna beams for transmission of ring ale Method of identifying antenna beams for transmission of ring ale

1997-07-31

2000-06-06

Kuntz, Curtis A.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455 133, 455 383, H04B 7185, H04B 700

Patent

active

060729864

ABSTRACT:
In a global satellite communication system (10) that provides antenna beams that move with respect to Earth's surface, gateways (22) send ring alerts directed to subscriber units (26) based on a list of antenna beams. The list of antenna beams is determined by a dot product between a subscriber unit's basis vector and antenna beam vectors. Ring alerts are transmitted in antenna beams when the dot product exceeds a predetermined threshold. Subscriber units listen for ring alerts in the same antenna beams of the list by calculating the list the same way the gateway calculates the list.

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patent: 5732387 (1998-03-01), Armbruster et al.
patent: 5809396 (1998-09-01), Armbruster et al.

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