CA2015105A1 - Hybrid modulation satellite communication system - Google Patents

Hybrid modulation satellite communication system

Info

Publication number
CA2015105A1
CA2015105A1 CA2015105A CA2015105A CA2015105A1 CA 2015105 A1 CA2015105 A1 CA 2015105A1 CA 2015105 A CA2015105 A CA 2015105A CA 2015105 A CA2015105 A CA 2015105A CA 2015105 A1 CA2015105 A1 CA 2015105A1
Authority
CA
Canada
Prior art keywords
earth station
communication system
small earth
satellite communication
small
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
CA2015105A
Other languages
French (fr)
Other versions
CA2015105C (en
Inventor
Toshio Mizuno
Takuro Muratani
Yasuhiko Ito
Tatsuo Watanabe
Takashi Inoue
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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
Priority claimed from JP9993689A external-priority patent/JPH02280423A/en
Priority claimed from JP1192690A external-priority patent/JPH03217138A/en
Application filed by Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Publication of CA2015105A1 publication Critical patent/CA2015105A1/en
Application granted granted Critical
Publication of CA2015105C publication Critical patent/CA2015105C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • 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
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18532—Arrangements for managing transmission, i.e. for transporting data or a signalling message

Abstract

In a satellite communication system including a plural small earth stations (3-8), a relay earth station (2) and a satellite (1), information transmission is undertaken by primary modulation of carrier wave, and transmission of operation status of each small earth station (3-8) is carried out by secondary modulation of said carrier wave. Primary modulation may be BPSK or multiphase PSK (MPSK), and secondary modulation may be PSK, ASK or FSK. Said operation status may be receive signal quality in each small earth station, and the relay earth station (2) may adjust transmit power to said small earth station such that the receive signal quality at small earth stations satisfies desired criteria irrespective of rain attenuation.
CA002015105A 1989-04-21 1990-04-20 Hybrid modulation satellite communication system Expired - Fee Related CA2015105C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP99936/89 1989-04-21
JP9993689A JPH02280423A (en) 1989-04-21 1989-04-21 Transmission power control system using superimposing modulation
JP11926/90 1990-01-23
JP1192690A JPH03217138A (en) 1990-01-23 1990-01-23 Transmission/reception system for operation state information of earth station using superposition modulation

Publications (2)

Publication Number Publication Date
CA2015105A1 true CA2015105A1 (en) 1990-10-21
CA2015105C CA2015105C (en) 1994-07-26

Family

ID=26347456

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002015105A Expired - Fee Related CA2015105C (en) 1989-04-21 1990-04-20 Hybrid modulation satellite communication system

Country Status (3)

Country Link
US (1) US5066957A (en)
AU (1) AU619105B2 (en)
CA (1) CA2015105C (en)

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US5815525A (en) * 1991-05-13 1998-09-29 Omnipoint Corporation Multi-band, multi-mode spread-spectrum communication system
US5455960A (en) * 1992-01-16 1995-10-03 Harris Corporation Low-power access technique for certain satellite transponders
US6088590A (en) * 1993-11-01 2000-07-11 Omnipoint Corporation Method and system for mobile controlled handoff and link maintenance in spread spectrum communication
US6094575A (en) * 1993-11-01 2000-07-25 Omnipoint Corporation Communication system and method
US6005856A (en) * 1993-11-01 1999-12-21 Omnipoint Corporation Communication protocol for spread spectrum wireless communication system
US5436941A (en) * 1993-11-01 1995-07-25 Omnipoint Corporation Spread spectrum spectral density techniques
JPH07264091A (en) * 1994-03-18 1995-10-13 Toshiba Corp Communication equipment for radio card
US5535438A (en) * 1994-05-10 1996-07-09 Panasonic Technologies, Inc. Phase linear class E amplifier for a satellite communication terminal which communicates with a low earth orbiting satellite
US5659574A (en) * 1994-09-09 1997-08-19 Omnipoint Corporation Multi-bit correlation of continuous phase modulated signals
US5610940A (en) * 1994-09-09 1997-03-11 Omnipoint Corporation Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal
US5881100A (en) 1994-09-09 1999-03-09 Omnipoint Corporation Method and apparatus for coherent correlation of a spread spectrum signal
US5629956A (en) * 1994-09-09 1997-05-13 Omnipoint Corporation Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal
US5757847A (en) 1994-09-09 1998-05-26 Omnipoint Corporation Method and apparatus for decoding a phase encoded signal
US5680414A (en) * 1994-09-09 1997-10-21 Omnipoint Corporation Synchronization apparatus and method for spread spectrum receiver
US5692007A (en) * 1994-09-09 1997-11-25 Omnipoint Corporation Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation
US5627856A (en) * 1994-09-09 1997-05-06 Omnipoint Corporation Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators
US5754584A (en) 1994-09-09 1998-05-19 Omnipoint Corporation Non-coherent spread-spectrum continuous-phase modulation communication system
US5754585A (en) 1994-09-09 1998-05-19 Omnipoint Corporation Method and apparatus for serial noncoherent correlation of a spread spectrum signal
US5953370A (en) * 1994-09-09 1999-09-14 Omnipoint Corporation Apparatus for receiving and correlating a spread spectrum signal
US5963586A (en) 1994-09-09 1999-10-05 Omnipoint Corporation Method and apparatus for parallel noncoherent correlation of a spread spectrum signal
US5856998A (en) * 1994-09-09 1999-01-05 Omnipoint Corporation Method and apparatus for correlating a continuous phase modulated spread spectrum signal
US5832028A (en) * 1994-09-09 1998-11-03 Omnipoint Corporation Method and apparatus for coherent serial correlation of a spread spectrum signal
US5648982A (en) * 1994-09-09 1997-07-15 Omnipoint Corporation Spread spectrum transmitter
US5784403A (en) * 1995-02-03 1998-07-21 Omnipoint Corporation Spread spectrum correlation using saw device
US5832022A (en) * 1995-06-02 1998-11-03 Omnipoint Corporation Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals
US5892774A (en) * 1996-12-12 1999-04-06 Qualcomm Incorporated Phase shift encoded subchannel
DE19744428C1 (en) * 1997-10-08 1999-02-25 Texas Instruments Deutschland Digital data signal transmission method
US6947469B2 (en) 1999-05-07 2005-09-20 Intel Corporation Method and Apparatus for wireless spread spectrum communication with preamble processing period
US6349214B1 (en) 1999-05-21 2002-02-19 Warren L. Braun Synchronization of broadcast facilities via satellite
US6842433B2 (en) * 2001-04-24 2005-01-11 Wideray Corporation System and method for communicating information from a computerized distributor to portable computing devices
GB0401475D0 (en) * 2004-01-09 2004-02-25 Koninkl Philips Electronics Nv Method of signalling
KR102200811B1 (en) * 2014-05-09 2021-01-11 삼성전자 주식회사 Apparatus and method for demodulating of hybrid modulation symbol in a wireless communication system using hybrid modulation scheme

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1379559A (en) * 1971-11-02 1975-01-02 Int Computers Ltd Modulation circuits
US4228538A (en) * 1977-12-15 1980-10-14 Harris Corporation Real-time adaptive power control in satellite communications systems
US4455651A (en) * 1980-10-20 1984-06-19 Equatorial Communications Company Satellite communications system and apparatus
FR2494938A1 (en) * 1980-11-21 1982-05-28 Thomson Csf METHOD FOR TRANSMITTING THE OPERATING SIGNALS OF A DIGITAL RADIO BEAM, TRANSMITTER AND RECEIVER FOR IMPLEMENTING SUCH A METHOD
US4418350A (en) * 1981-03-23 1983-11-29 Hughes Aircraft Company Two-axis antenna direction control system
CA1196961A (en) * 1981-11-16 1985-11-19 Goro Oshima Earth station transmission power control system for keeping an eirp of down link signals constant irrespective of weather
US4744083A (en) * 1984-09-14 1988-05-10 Geostar Corporation Satellite-based position determining and message transfer system with monitoring of link quality
JPS6261431A (en) * 1985-09-12 1987-03-18 Kokusai Denshin Denwa Co Ltd <Kdd> Transmission power control system
US4752967A (en) * 1985-11-29 1988-06-21 Tandem Computers Incorporated Power control system for satellite communications
JPS6346824A (en) * 1986-08-14 1988-02-27 Kokusai Denshin Denwa Co Ltd <Kdd> Transmission power control system
US4876737A (en) * 1986-11-26 1989-10-24 Microdyne Corporation Satellite data transmission and receiving station

Also Published As

Publication number Publication date
US5066957A (en) 1991-11-19
CA2015105C (en) 1994-07-26
AU619105B2 (en) 1992-01-16
AU5372790A (en) 1990-10-25

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Legal Events

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EEER Examination request
MKLA Lapsed