KR950011075B1 - 단위 대역폭당 증가된 전력출력 밀도를 갖는 통신위성 시스템 - Google Patents

단위 대역폭당 증가된 전력출력 밀도를 갖는 통신위성 시스템 Download PDF

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Publication number
KR950011075B1
KR950011075B1 KR1019920004821A KR920004821A KR950011075B1 KR 950011075 B1 KR950011075 B1 KR 950011075B1 KR 1019920004821 A KR1019920004821 A KR 1019920004821A KR 920004821 A KR920004821 A KR 920004821A KR 950011075 B1 KR950011075 B1 KR 950011075B1
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KR
South Korea
Prior art keywords
signal
signals
spread spectrum
demodulator
data signal
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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.)
Expired - Fee Related
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KR1019920004821A
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English (en)
Korean (ko)
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KR920019114A (ko
Inventor
솔레이마니 모하마드
로스타미 사산
Original Assignee
휴우즈 에어크라프트 캄파니
완다 케이. 덴슨-로우
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Publication of KR920019114A publication Critical patent/KR920019114A/ko
Application granted granted Critical
Publication of KR950011075B1 publication Critical patent/KR950011075B1/ko
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • 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
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0028—Correction of carrier offset at passband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
KR1019920004821A 1991-03-26 1992-03-25 단위 대역폭당 증가된 전력출력 밀도를 갖는 통신위성 시스템 Expired - Fee Related KR950011075B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/674,746 1991-03-26
US07/674,746 US5208829A (en) 1991-03-26 1991-03-26 Communication satellite system having an increased power output density per unit of bandwidth

Publications (2)

Publication Number Publication Date
KR920019114A KR920019114A (ko) 1992-10-22
KR950011075B1 true KR950011075B1 (ko) 1995-09-27

Family

ID=24707740

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920004821A Expired - Fee Related KR950011075B1 (ko) 1991-03-26 1992-03-25 단위 대역폭당 증가된 전력출력 밀도를 갖는 통신위성 시스템

Country Status (10)

Country Link
US (1) US5208829A (https=)
EP (1) EP0505771B1 (https=)
JP (1) JPH0761038B2 (https=)
KR (1) KR950011075B1 (https=)
AU (1) AU640864B2 (https=)
BR (1) BR9201035A (https=)
CA (1) CA2055387C (https=)
DE (1) DE69213284T2 (https=)
MX (1) MX9201341A (https=)
TW (1) TW230854B (https=)

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KR100705158B1 (ko) * 2000-12-08 2007-04-09 엘지전자 주식회사 복소수 기저대역 정합필터를 갖는 ｖｓｂ 수신기

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DE4243084A1 (https=) * 1991-12-20 1993-06-24 Clarion Co Ltd
DE69325224T2 (de) * 1992-09-24 1999-11-11 Canon K.K., Tokio/Tokyo Verfahren zur Frequenzkammspreizspektrummodulation
US5533046A (en) * 1992-10-08 1996-07-02 Lund; Vanmetre Spread spectrum communication system
US5363401A (en) * 1993-02-25 1994-11-08 Harris Corporation Mechanism for extracting hybrid (fh/ds) spread spectrum signals within multi-signal type environment
US5335249A (en) * 1993-07-29 1994-08-02 Seattle Silicon Corporation Method and apparatus for spread spectrum communications
US5377226A (en) * 1993-10-19 1994-12-27 Hughes Aircraft Company Fractionally-spaced equalizer for a DS-CDMA system
US5377225A (en) * 1993-10-19 1994-12-27 Hughes Aircraft Company Multiple-access noise rejection filter for a DS-CDMA system
US5459758A (en) 1993-11-02 1995-10-17 Interdigital Technology Corporation Noise shaping technique for spread spectrum communications
KR100217715B1 (ko) * 1993-12-31 1999-09-01 윤종용 직접확산/부호분할 다중접근 시스템에서의 업-링크 접근 시스템
US5574747A (en) 1995-01-04 1996-11-12 Interdigital Technology Corporation Spread spectrum adaptive power control system and method
US5790601A (en) * 1995-02-21 1998-08-04 Hughes Electronics Low cost very small aperture satellite terminal
US5774788A (en) * 1995-03-17 1998-06-30 Hughes Electronics Remote ground terminal having an outdoor unit with a frequency-multiplier
US5845206A (en) * 1995-03-24 1998-12-01 Virtual Geosatellite Holdings, Inc. Elliptical satellite system which emulates the characteristics of geosynchronous satellites
US6795687B1 (en) 1998-04-06 2004-09-21 Virtual Geosatellite Llc Elliptical satellite system emulating characteristics of geosynchronous satellites during the apogee portion of an elliptical orbit
US5640416A (en) * 1995-06-07 1997-06-17 Comsat Corporation Digital downconverter/despreader for direct sequence spread spectrum communications system
US5712866A (en) * 1995-07-18 1998-01-27 Westinghouse Electric Corporation Small low powered digital transmitter for covert remote surveillance
US5796959A (en) * 1995-10-12 1998-08-18 Interdigital Technology Corporation Noise shaping technique for spread spectrum communications
US6029058A (en) * 1996-07-19 2000-02-22 The Board Of Trustee Of The Leland Stanford Junior University Spectrum control for direct conversion radio frequency reception
US6018553A (en) * 1996-09-18 2000-01-25 Wireless Access Multi-level mixer architecture for direct conversion of FSK signals
US5956620A (en) 1997-01-17 1999-09-21 Com Dev Limited Analog processor for digital satellites
US6021268A (en) * 1997-08-21 2000-02-01 Analytical Graphics, Inc. Method and apparatus for modeling receiver bandwidth for telecommunications analysis
US6047162A (en) 1997-09-25 2000-04-04 Com Dev Limited Regional programming in a direct broadcast satellite
US6075781A (en) * 1997-12-12 2000-06-13 Stanford Telecommunications, Inc. Flux density reduction in OCDMA satellite communication system
US6590872B1 (en) * 1997-12-12 2003-07-08 Thomson Licensing S.A. Receiver with parallel correlator for acquisition of spread spectrum digital transmission
EP1051816B1 (de) * 1997-12-31 2002-05-29 Schleifring und Apparatebau GmbH Vorrichtung zur störarmen signalübertragung
US6477200B1 (en) * 1998-11-09 2002-11-05 Broadcom Corporation Multi-pair gigabit ethernet transceiver
US6301310B1 (en) 1998-12-14 2001-10-09 Hughes Electronics Corporation Efficient implementation for systems using CEOQPSK
US6879817B1 (en) * 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6731706B1 (en) * 1999-10-29 2004-05-04 Intel Corporation Square root raised cosine symmetric filter for mobile telecommunications
US6473597B1 (en) 2000-04-12 2002-10-29 Thomas M. Johnson Method and apparatus for modeling transmitter bandwidth for telecommunications analysis
EP1316233B1 (en) * 2000-08-02 2011-10-05 ATC Technologies, LLC Coordinated frequency reuse of a terrestrial and a satellite system.
US6859652B2 (en) * 2000-08-02 2005-02-22 Mobile Satellite Ventures, Lp Integrated or autonomous system and method of satellite-terrestrial frequency reuse using signal attenuation and/or blockage, dynamic assignment of frequencies and/or hysteresis
US7792488B2 (en) 2000-12-04 2010-09-07 Atc Technologies, Llc Systems and methods for transmitting electromagnetic energy over a wireless channel having sufficiently weak measured signal strength
US7440489B2 (en) * 2001-08-07 2008-10-21 Ericsson Inc. Method and apparatus for selective demodulation and decoding of communications signals
KR100419281B1 (ko) * 2001-12-27 2004-02-18 한국전자통신연구원 위성통신 송신데이터 처리기 및 그 제어 방법
CN101383663B (zh) * 2008-10-23 2012-10-10 山东科技大学 一种透地通信系统
CN106681456A (zh) * 2016-12-06 2017-05-17 江西鑫田车业有限公司 一种cpu冷却用铝制散热器
CN108957489B (zh) * 2018-05-29 2022-04-05 中国科学院光电研究院 一种低轨卫星导航增强信号的地面测试验证系统及方法
US10491264B1 (en) * 2018-11-12 2019-11-26 Analog Devices Global Unlimited Company Combined demodulator and despreader
CN114422013B (zh) * 2021-12-23 2023-12-08 中国人民解放军63921部队 自适应抗干扰卫星通信方法、装置、系统及设备

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US4455651A (en) * 1980-10-20 1984-06-19 Equatorial Communications Company Satellite communications system and apparatus
DE3278915D1 (en) * 1981-12-31 1988-09-22 Secr Defence Brit Receivers for navigation satellite systems
GB8507903D0 (en) * 1985-03-26 1985-05-01 Tomlinson M Noise-reduction signal processing arrangement
JPS6393233A (ja) * 1986-10-08 1988-04-23 Oki Electric Ind Co Ltd スペクトル拡散通信システム
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US4759034A (en) * 1986-12-02 1988-07-19 General Research Of Electronics, Inc. Multi-step spread spectrum communication apparatus
JPS63151236A (ja) * 1986-12-16 1988-06-23 Matsushita Electric Ind Co Ltd 電力線搬送スペクトラム拡散通信装置
DE3808328C1 (https=) * 1988-03-12 1989-06-29 Standard Elektrik Lorenz Ag, 7000 Stuttgart, De
CH676179A5 (https=) * 1988-09-29 1990-12-14 Ascom Zelcom Ag
US4972430A (en) * 1989-03-06 1990-11-20 Raytheon Company Spread spectrum signal detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100705158B1 (ko) * 2000-12-08 2007-04-09 엘지전자 주식회사 복소수 기저대역 정합필터를 갖는 ｖｓｂ 수신기

Also Published As

Publication number Publication date
EP0505771A1 (en) 1992-09-30
DE69213284T2 (de) 1997-01-23
MX9201341A (es) 1992-10-01
EP0505771B1 (en) 1996-09-04
JPH0761038B2 (ja) 1995-06-28
US5208829A (en) 1993-05-04
JPH0591008A (ja) 1993-04-09
TW230854B (https=) 1994-09-21
AU1309992A (en) 1992-10-29
BR9201035A (pt) 1992-12-01
DE69213284D1 (de) 1996-10-10
CA2055387C (en) 1995-05-16
KR920019114A (ko) 1992-10-22
AU640864B2 (en) 1993-09-02

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