CA2029284A1 - Relay communication system - Google Patents

Relay communication system

Info

Publication number
CA2029284A1
CA2029284A1 CA2029284A CA2029284A CA2029284A1 CA 2029284 A1 CA2029284 A1 CA 2029284A1 CA 2029284 A CA2029284 A CA 2029284A CA 2029284 A CA2029284 A CA 2029284A CA 2029284 A1 CA2029284 A1 CA 2029284A1
Authority
CA
Canada
Prior art keywords
signals
radio frequency
synchronized
power amplifier
code division
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
CA2029284A
Other languages
French (fr)
Other versions
CA2029284C (en
Inventor
Arnold L. Berman
Gilles G. Du Bellay
Marvin R. Wachs
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.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of CA2029284A1 publication Critical patent/CA2029284A1/en
Application granted granted Critical
Publication of CA2029284C publication Critical patent/CA2029284C/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
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]

Abstract

The invention is a relay communications system which uses a single reference frequency signal generator to produce a plurality of precisely frequency synchronized code division multiple access radio frequency signals. A transmitter transmits the synchronized signals to a remote satellite based retransmitter which includes a slave oscillator precisely synchronized to the reference signal generator for down-linking the multiple radio frequency signals to a common radio frequency with all of thedown-linked signals being in precise phase synchronism. The relative phase of the down-linked signals can be preserved or altered and the signals combined and amplified by a high-power amplifier operating in the saturation mode. The output from the high power amplifier is applied to a beamforming network to form an overlapping beam signal comprised of multiple code division multiple access information signals.
CA002029284A 1989-12-01 1990-11-05 Relay communication system Expired - Fee Related CA2029284C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US444,499 1989-12-01
US07/444,499 US5038341A (en) 1989-12-01 1989-12-01 Relay communication system

Publications (2)

Publication Number Publication Date
CA2029284A1 true CA2029284A1 (en) 1991-06-02
CA2029284C CA2029284C (en) 1998-07-14

Family

ID=23765168

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002029284A Expired - Fee Related CA2029284C (en) 1989-12-01 1990-11-05 Relay communication system

Country Status (5)

Country Link
US (1) US5038341A (en)
EP (1) EP0430587B1 (en)
JP (1) JPH0799824B2 (en)
CA (1) CA2029284C (en)
DE (1) DE69023206T2 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI86124C (en) * 1990-11-15 1992-07-10 Telenokia Oy RADIOSAENDARMOTTAGARSYSTEM.
CA2105710A1 (en) * 1992-11-12 1994-05-13 Raymond Joseph Leopold Network of hierarchical communication systems and method therefor
US5394120A (en) * 1993-04-13 1995-02-28 Japan Radio Co., Ltd. Device for testing an amplifier
US5625871A (en) * 1994-09-30 1997-04-29 Lucent Technologies Inc. Cellular communications system with multicarrier signal processing
US5570350A (en) * 1994-09-30 1996-10-29 Lucent Technologies Inc. CDMA cellular communications with multicarrier signal processing
JP2718398B2 (en) * 1995-06-30 1998-02-25 日本電気株式会社 CDMA base station transmitter
FR2737014B1 (en) * 1995-07-17 1997-10-10 Centre Nat Etd Spatiales SYSTEM AND METHOD FOR MEASURING THE TOTAL ELECTRONIC CONTENT OF THE IONOSPHERE
US5745839A (en) * 1995-09-01 1998-04-28 Cd Radio, Inc. Satellite multiple access system with distortion cancellation and compression compensation
DE19603443C1 (en) * 1996-01-31 1997-07-10 Siemens Ag Code-modulated transmission method and a transmission system operating according to this transmission method
US6223019B1 (en) 1996-03-14 2001-04-24 Sirius Satellite Radio Inc. Efficient high latitude service area satellite mobile broadcasting systems
DE19633519A1 (en) * 1996-08-09 1998-02-12 Sylke Dipl Ing Bechstein Spread=spectrum signal transmission method
JP3311951B2 (en) 1996-12-20 2002-08-05 富士通株式会社 Code multiplex transmitter
US6826169B1 (en) 1996-12-20 2004-11-30 Fujitsu Limited Code multiplexing transmitting apparatus
US5903549A (en) * 1997-02-21 1999-05-11 Hughes Electronics Corporation Ground based beam forming utilizing synchronized code division multiplexing
US6023616A (en) * 1998-03-10 2000-02-08 Cd Radio Inc. Satellite broadcast receiver system
US6072770A (en) * 1997-03-04 2000-06-06 At&T Corporation Method and system providing unified DPSK-PSK signalling for CDMA-based satellite communications
US6072785A (en) * 1997-03-04 2000-06-06 At&T Corp Differential PSK signalling in CDMA networks
US6072769A (en) * 1997-03-04 2000-06-06 At&T Corporation Method for multitone division multiple access communications
US6148024A (en) * 1997-03-04 2000-11-14 At&T Corporation FFT-based multitone DPSK modem
US6101168A (en) * 1997-11-13 2000-08-08 Qualcomm Inc. Method and apparatus for time efficient retransmission using symbol accumulation
US20050223306A1 (en) * 2004-03-30 2005-10-06 Franca-Neto Luiz M Communications apparatus, systems, and methods
US8165171B2 (en) * 2009-03-19 2012-04-24 Raytheon Bbn Technologies Corp. Methods and systems for distributed synchronization

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232266A (en) * 1978-09-05 1980-11-04 Bell Telephone Laboratories, Incorporated Technique for sharing a plurality of transponders among a same or larger number of channels
US4494228A (en) * 1982-08-12 1985-01-15 The United States Of America As Represented By The Secretary Of The Army Orthogonal code division multiple access communications systems
DE3447107A1 (en) * 1984-12-22 1986-06-26 Philips Patentverwaltung Gmbh, 2000 Hamburg PROCESS FOR TRANSMITTING MESSAGES IN A DIGITAL RADIO TRANSMISSION SYSTEM
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters

Also Published As

Publication number Publication date
EP0430587A2 (en) 1991-06-05
EP0430587B1 (en) 1995-10-25
EP0430587A3 (en) 1992-04-08
DE69023206T2 (en) 1996-04-18
US5038341A (en) 1991-08-06
CA2029284C (en) 1998-07-14
DE69023206D1 (en) 1995-11-30
JPH03190330A (en) 1991-08-20
JPH0799824B2 (en) 1995-10-25

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 19991105