Transceiver having steerable antenna and associated method

Details Transceiver having steerable antenna and associated method Transceiver having steerable antenna and associated method

1995-02-27

1996-09-24

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

455 133, 455 25, 455 332, H04B 7195

Patent

active

055598064

ABSTRACT:
An earth station transceiver (210) is provided for communicating with at least one satellite (110, 120) in orbit. The earth station transceiver (210) has an antenna with an array of antenna elements (220, 230) and steering circuitry (240) for steering an antenna pattern created by the array of antenna elements. A position of a beam (310-330) from a satellite can be represented by a beam number. The antenna pattern can be determined without taking signal quality measurements when the beam is at an extreme elevation angle as represented by the beam number. Signal quality measurements can alternatively be made during a time slot or frame to choose an antenna pattern instead of choosing an antenna pattern based on satellite beam number when the beam is not at an extreme elevation angle. Signal quality measurements using the same antenna pattern are made to perform an intra-site handoff. Signal quality measurements using all antenna patterns are made to perform an intersite handoff.

REFERENCES:
patent: 3340531 (1967-09-01), Kefalas et al.
patent: 4977616 (1990-12-01), Linder et al.
patent: 5095535 (1992-03-01), Freeburg
patent: 5157407 (1992-10-01), Omiya
patent: 5194873 (1993-03-01), Sickles, II
patent: 5239541 (1993-08-01), Murai
patent: 5303240 (1994-04-01), Borras et al.
patent: 5408237 (1995-04-01), Patterson et al.
patent: 5432780 (1995-07-01), Smith et al.

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