CA2250430A1 - Method and system for reducing interbeam interference and multipath fading in bent-pipe satellite communications systems - Google Patents

Method and system for reducing interbeam interference and multipath fading in bent-pipe satellite communications systems

Info

Publication number
CA2250430A1
CA2250430A1 CA002250430A CA2250430A CA2250430A1 CA 2250430 A1 CA2250430 A1 CA 2250430A1 CA 002250430 A CA002250430 A CA 002250430A CA 2250430 A CA2250430 A CA 2250430A CA 2250430 A1 CA2250430 A1 CA 2250430A1
Authority
CA
Canada
Prior art keywords
code
transmitter
group
groups
communications
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002250430A
Other languages
French (fr)
Other versions
CA2250430C (en
Inventor
Matthew J. Sherman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Publication of CA2250430A1 publication Critical patent/CA2250430A1/en
Application granted granted Critical
Publication of CA2250430C publication Critical patent/CA2250430C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H04B7/18513—Transmission in a satellite or space-based system

Abstract

A method and system of forming and processing communication links in a satellitecommunications system. The satellite communications system includes a plurality of groups of transmitters, a satellite and a plurality of destination receivers. Each transmitter is associated with only one transmitter group and transmits a communications signal. Each respective communications signal is a CDMA signal having a predetermined code that is associated with a transmitter. Each respective predetermined code is selected from a code set assigned to the group of transmitters with which the transmitter is grouped. Each code set is different from code sets associated with the transmitters of other selected transmitter groups so that the code sets are arranged in a code set pattern that is repeated for selected groups of transmitters. The satellite receives the communications signals and groups together each received communications signal having a same predetermined code set. The code sets of selected uplink communications signals in a group of received communications signals are fully or partially despread, filtered, and respread so that the group of communications signals contains communications signals from only one code set.
Each group of communications signals is then transmitted to a different destination receiver, or groups on different code sets to the same destination receiver.
CA002250430A 1997-10-17 1998-10-13 Method and system for reducing interbeam interference and multipath fading in bent-pipe satellite communications systems Expired - Fee Related CA2250430C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/953,600 1997-10-17
US08/953,600 US5966371A (en) 1997-10-17 1997-10-17 Method and system for reducing interbeam interference and multipath fading in bent-pipe satellite communications systems

Publications (2)

Publication Number Publication Date
CA2250430A1 true CA2250430A1 (en) 1999-04-17
CA2250430C CA2250430C (en) 2002-01-22

Family

ID=25494238

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002250430A Expired - Fee Related CA2250430C (en) 1997-10-17 1998-10-13 Method and system for reducing interbeam interference and multipath fading in bent-pipe satellite communications systems

Country Status (5)

Country Link
US (1) US5966371A (en)
EP (1) EP0910178A3 (en)
JP (1) JP4459319B2 (en)
CN (1) CN1215262A (en)
CA (1) CA2250430C (en)

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Also Published As

Publication number Publication date
JPH11225104A (en) 1999-08-17
CA2250430C (en) 2002-01-22
EP0910178A2 (en) 1999-04-21
JP4459319B2 (en) 2010-04-28
CN1215262A (en) 1999-04-28
EP0910178A3 (en) 2001-07-11
US5966371A (en) 1999-10-12

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