CA2197261A1 - Symbol Switching of CDMA Channels - Google Patents

Symbol Switching of CDMA Channels

Info

Publication number
CA2197261A1
CA2197261A1 CA2197261A CA2197261A CA2197261A1 CA 2197261 A1 CA2197261 A1 CA 2197261A1 CA 2197261 A CA2197261 A CA 2197261A CA 2197261 A CA2197261 A CA 2197261A CA 2197261 A1 CA2197261 A1 CA 2197261A1
Authority
CA
Canada
Prior art keywords
switch
cdma channels
symbol switching
channels
level
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
CA2197261A
Other languages
French (fr)
Other versions
CA2197261C (en
Inventor
Richard Henry Erving
Diakoumis Parissis Gerakoulis
Robert Raymond Ii Miller
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 CA2197261A1 publication Critical patent/CA2197261A1/en
Application granted granted Critical
Publication of CA2197261C publication Critical patent/CA2197261C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • 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
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Abstract

A digital switch included within a satellite, processes uplink beams and the included traffic channels at a symbol level instead at a bit level. In this system the switch performs as a repeater on the per user basis and as a switch at the beam level. Individual user signals (i.e., channels) are separated from the uplink beam and recombined into the appropriate downlink beam.
CA002197261A 1996-05-06 1997-02-11 Symbol switching of cdma channels Expired - Lifetime CA2197261C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/643,720 US5805579A (en) 1996-05-06 1996-05-06 Symbol switching of CDMA channels
US643,720 1996-05-06

Publications (2)

Publication Number Publication Date
CA2197261A1 true CA2197261A1 (en) 1997-11-07
CA2197261C CA2197261C (en) 2000-03-14

Family

ID=24582007

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002197261A Expired - Lifetime CA2197261C (en) 1996-05-06 1997-02-11 Symbol switching of cdma channels

Country Status (6)

Country Link
US (1) US5805579A (en)
EP (1) EP0806846A3 (en)
JP (1) JPH1070521A (en)
KR (1) KR100488629B1 (en)
AU (1) AU738832B2 (en)
CA (1) CA2197261C (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5995497A (en) * 1996-04-23 1999-11-30 At&T Corp. Method and apparatus for switching code division multiple access modulated beams in a satellite
US6049566A (en) * 1997-07-24 2000-04-11 Trw Inc. High efficiency signaling with minimum spacecraft hardware
US6980531B1 (en) 1998-12-02 2005-12-27 At&T Corp. Multiple access spread spectrum switching methodology
US6707802B1 (en) 1999-12-22 2004-03-16 At&T Corp. Method and apparatus for code division switching of communication signals by trunk coding
US7099624B1 (en) * 1999-12-22 2006-08-29 At&T Corp Method for code division switching of communication signals by trunk coding in a satellite communication system
GB2362279B (en) * 2000-05-12 2004-12-29 Global Silicon Ltd Radio receiver
US7009958B1 (en) 2000-05-19 2006-03-07 At&T Corp. Unified encoding process for generalized multiple access
EP1199828A3 (en) * 2000-10-20 2003-01-22 TRW Inc. High efficiency signaling with selective coding and interleaving
US20040202137A1 (en) * 2001-01-26 2004-10-14 Gerakoulis Diakoumis Parissis Method for CDMA to packet-switching interface code division switching in a terrestrial wireless system
US6912211B2 (en) 2001-01-26 2005-06-28 At&T Corp. CDMA to packet-switching interface for code division switching in a terrestrial wireless system
US7356010B2 (en) * 2002-12-02 2008-04-08 Ntt Docomo Inc. Point coordinator control passing scheme using a scheduling information parameter set for an IEEE 802.11 wireless local area network
KR100579127B1 (en) 2003-11-19 2006-05-12 한국전자통신연구원 Satellite transponder switch control apparatus and method for multibeam communication
EP2645597B2 (en) 2006-09-26 2024-03-06 ViaSat, Inc. Improved spot beam satellite systems
US8107875B2 (en) * 2006-09-26 2012-01-31 Viasat, Inc. Placement of gateways near service beams
US8538323B2 (en) 2006-09-26 2013-09-17 Viasat, Inc. Satellite architecture
AU2016302616B2 (en) * 2015-07-31 2020-06-25 Viasat, Inc. Flexible capacity satellite constellation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491947A (en) * 1983-05-31 1985-01-01 At&T Bell Laboratories Technique for dynamic scheduling of integrated circuit- and packet-switching in a multi-beam SS/TDMA system
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5239545A (en) * 1990-11-05 1993-08-24 Motorola, Inc. Channel access control in a communication system
CA2108459A1 (en) * 1991-05-29 1992-11-30 Russell J. Fang Fully meshed cdma network for personal communications terminals
GB9209027D0 (en) * 1992-04-25 1992-06-17 British Aerospace Multi purpose digital signal regenerative processing apparatus
US5365590A (en) * 1993-04-19 1994-11-15 Ericsson Ge Mobile Communications Inc. System for providing access to digitally encoded communications in a distributed switching network
US5604920A (en) * 1993-04-21 1997-02-18 Motorola, Inc. Satellite cellular telephone and data communication system
US5424862A (en) * 1994-04-28 1995-06-13 Glynn; Thomas W. High capacity communications satellite
US5506848A (en) * 1994-06-22 1996-04-09 At&T Corp. Demand assignment system and method for mobile users in a community of interest
US5602833A (en) * 1994-12-19 1997-02-11 Qualcomm Incorporated Method and apparatus for using Walsh shift keying in a spread spectrum communication system

Also Published As

Publication number Publication date
KR970078066A (en) 1997-12-12
EP0806846A2 (en) 1997-11-12
MX9703293A (en) 1997-11-29
AU738832B2 (en) 2001-09-27
EP0806846A3 (en) 1999-12-15
AU1999797A (en) 1997-11-13
CA2197261C (en) 2000-03-14
KR100488629B1 (en) 2005-08-11
US5805579A (en) 1998-09-08
JPH1070521A (en) 1998-03-10

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170213