WO2005117288A3 - Satellite communications systems and methods using radiotelephone location-based beamforming - Google Patents

Satellite communications systems and methods using radiotelephone location-based beamforming Download PDF

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Publication number
WO2005117288A3
WO2005117288A3 PCT/US2005/017297 US2005017297W WO2005117288A3 WO 2005117288 A3 WO2005117288 A3 WO 2005117288A3 US 2005017297 W US2005017297 W US 2005017297W WO 2005117288 A3 WO2005117288 A3 WO 2005117288A3
Authority
WO
WIPO (PCT)
Prior art keywords
methods
satellite communications
communications systems
based beamforming
satellite
Prior art date
Application number
PCT/US2005/017297
Other languages
French (fr)
Other versions
WO2005117288A2 (en
Inventor
Peter D Karabinis
Santanu Dutta
Original Assignee
Mobile Satellite Ventures Lp
Churan Gary G
Peter D Karabinis
Santanu Dutta
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mobile Satellite Ventures Lp, Churan Gary G, Peter D Karabinis, Santanu Dutta filed Critical Mobile Satellite Ventures Lp
Priority to EP05751928A priority Critical patent/EP1747622B1/en
Priority to DK05751928.2T priority patent/DK1747622T3/en
Priority to DE602005022182T priority patent/DE602005022182D1/en
Priority to BRPI0511172-2A priority patent/BRPI0511172A/en
Priority to AT05751928T priority patent/ATE473561T1/en
Publication of WO2005117288A2 publication Critical patent/WO2005117288A2/en
Publication of WO2005117288A3 publication Critical patent/WO2005117288A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18515—Transmission equipment in satellites or space-based relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/2041—Spot beam multiple access

Abstract

A processor for use in a satellite communications system includes a selector that is configured to select a subset of a plurality of spatially diverse satellite signals based upon a location of a radioterminal. The processor further includes a signal processor that is configured to detect a return-link transmission from the radioterminal responsive to the selected subset of the spatially diverse satellite signals. The respective spatially diverse satellite signals may include respective signals corresponding to respective antenna elements of a satellite. The selector and the signal processor may be ground based.
PCT/US2005/017297 2004-05-18 2005-05-17 Satellite communications systems and methods using radiotelephone location-based beamforming WO2005117288A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP05751928A EP1747622B1 (en) 2004-05-18 2005-05-17 Satellite communications systems and methods using radiotelephone location-based beamforming
DK05751928.2T DK1747622T3 (en) 2004-05-18 2005-05-17 Satellite communication systems and methods using radiotelephone location-determined radiation
DE602005022182T DE602005022182D1 (en) 2004-05-18 2005-05-17 SATELLITE COMMUNICATION SYSTEMS AND METHOD FOR THE USE OF LOCALLY DEVICED RADIO PHONE JET FORMING
BRPI0511172-2A BRPI0511172A (en) 2004-05-18 2005-05-17 processor for use of a satellite communications system, satellite communications system and method, beam former, and beam forming method
AT05751928T ATE473561T1 (en) 2004-05-18 2005-05-17 SATELLITE COMMUNICATION SYSTEMS AND METHOD FOR USING LOCATION-DEPENDENT RADIO TELEPHONE BEAMFORMING

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US57216404P 2004-05-18 2004-05-18
US60/572,164 2004-05-18
US11/126,799 2005-05-11
US11/126,799 US8265549B2 (en) 2004-05-18 2005-05-11 Satellite communications systems and methods using radiotelephone

Publications (2)

Publication Number Publication Date
WO2005117288A2 WO2005117288A2 (en) 2005-12-08
WO2005117288A3 true WO2005117288A3 (en) 2006-01-26

Family

ID=34970513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/017297 WO2005117288A2 (en) 2004-05-18 2005-05-17 Satellite communications systems and methods using radiotelephone location-based beamforming

Country Status (9)

Country Link
US (2) US8265549B2 (en)
EP (2) EP2271003B1 (en)
AT (1) ATE473561T1 (en)
BR (1) BRPI0511172A (en)
DE (1) DE602005022182D1 (en)
DK (1) DK1747622T3 (en)
ES (1) ES2346549T3 (en)
PT (1) PT1747622E (en)
WO (1) WO2005117288A2 (en)

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