JP4527879B2 - Ｏｃｄｍａ衛星通信システムにおける電波密度低減 - Google Patents

Ｏｃｄｍａ衛星通信システムにおける電波密度低減 Download PDF

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Publication number
JP4527879B2
JP4527879B2 JP2000550291A JP2000550291A JP4527879B2 JP 4527879 B2 JP4527879 B2 JP 4527879B2 JP 2000550291 A JP2000550291 A JP 2000550291A JP 2000550291 A JP2000550291 A JP 2000550291A JP 4527879 B2 JP4527879 B2 JP 4527879B2
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Japan
Prior art keywords
signal
frequency
communication system
orthogonal
subcarrier
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Expired - Fee Related
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JP2000550291A
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Japanese (ja)
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JP2002516548A (ja
JP2002516548A5 (enExample
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オールソン，ジョン
ナタリ，フランシス・ディー
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Nokia of America Corp
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Stanford Telecommunications Inc
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    • 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
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
JP2000550291A 1998-05-19 1999-05-18 Ｏｃｄｍａ衛星通信システムにおける電波密度低減 Expired - Fee Related JP4527879B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/080,952 1998-05-19
US09/080,952 US6075781A (en) 1997-12-12 1998-05-19 Flux density reduction in OCDMA satellite communication system
PCT/US1999/010905 WO1999060806A1 (en) 1998-05-19 1999-05-18 Flux density reduction in ocdma satellite communication system

Publications (3)

Publication Number Publication Date
JP2002516548A JP2002516548A (ja) 2002-06-04
JP2002516548A5 JP2002516548A5 (enExample) 2010-05-27
JP4527879B2 true JP4527879B2 (ja) 2010-08-18

Family

ID=22160721

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000550291A Expired - Fee Related JP4527879B2 (ja) 1998-05-19 1999-05-18 Ｏｃｄｍａ衛星通信システムにおける電波密度低減

Country Status (7)

Country Link
US (1) US6075781A (enExample)
EP (1) EP1077006B1 (enExample)
JP (1) JP4527879B2 (enExample)
CN (1) CN1310893A (enExample)
AU (1) AU4952099A (enExample)
DE (1) DE69934883T2 (enExample)
WO (1) WO1999060806A1 (enExample)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6711121B1 (en) * 1998-10-09 2004-03-23 At&T Corp. Orthogonal code division multiplexing for twisted pair channels
CA2276971A1 (en) * 1999-07-06 2001-01-06 Wen Tong Preamble using golay sequence for access channel in cellular communications systems
US7471735B2 (en) * 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7583728B2 (en) 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7423987B2 (en) * 2001-04-27 2008-09-09 The Directv Group, Inc. Feeder link configurations to support layered modulation for digital signals
GB0320352D0 (en) * 2003-09-01 2003-10-01 Secr Defence Digital modulation waveforms for use in ranging systems
CN102088305A (zh) 2005-02-18 2011-06-08 松下电器产业株式会社 无线通信方法、中继站装置和无线发送装置
CN102664722B (zh) * 2005-09-30 2015-11-25 三菱电机株式会社 无线通信系统及无线通信方法
US9065596B2 (en) 2005-09-30 2015-06-23 Mitsubishi Electric Corporation Wireless communication system and wireless communication method
WO2008004922A1 (en) * 2006-07-07 2008-01-10 Telefonaktiebolaget Lm Ericsson (Publ) Resource scheduling in wireless communication systems using beam forming
CN101795493B (zh) * 2010-03-12 2012-12-26 清华大学 一种适用于geo卫星移动通信系统的星上处理交换系统
US10469217B2 (en) * 2018-04-06 2019-11-05 Qualcomm Incorporated Disentangled orthogonal frequency division multiplexing for navigation and positioning signals
CN117978254A (zh) * 2024-03-07 2024-05-03 北京蓝凌星通科技有限公司 基于多条幅阵列天线的低轨蓝牙卫星正交调制方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856290B2 (ja) * 1979-04-04 1983-12-14 日本電信電話株式会社 移動無線通信方式
US5208829A (en) * 1991-03-26 1993-05-04 Hughes Aircraft Company Communication satellite system having an increased power output density per unit of bandwidth
US5687166A (en) * 1992-11-24 1997-11-11 Stanford Telecommunications, Inc. Modulation system for spread spectrum CDMA communication
US5473601A (en) * 1993-10-21 1995-12-05 Hughes Aircraft Company Frequency reuse technique for a high data rate satellite communication system
US5619503A (en) * 1994-01-11 1997-04-08 Ericsson Inc. Cellular/satellite communications system with improved frequency re-use
US5649318A (en) * 1995-03-24 1997-07-15 Terrastar, Inc. Apparatus for converting an analog c-band broadcast receiver into a system for simultaneously receiving analog and digital c-band broadcast television signals
US5638361A (en) * 1995-02-08 1997-06-10 Stanford Telecommunications, Inc. Frequency hopped return link with net entry channel for a satellite personal communications system
US5623485A (en) * 1995-02-21 1997-04-22 Lucent Technologies Inc. Dual mode code division multiple access communication system and method
US5623487A (en) * 1995-05-19 1997-04-22 Stanford Telecommunications, Inc. Doubly orthogonal code and frequency division multiple access communication system
US5764630A (en) * 1996-03-25 1998-06-09 Stanford Telecommunications, Inc. Forward link carrier recovery in an OCDMA spread spectrum communication system without a pilot tone
US6134215A (en) * 1996-04-02 2000-10-17 Qualcomm Incorpoated Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel
JP3426888B2 (ja) * 1996-12-25 2003-07-14 日本電信電話株式会社 マルチビーム通信方法およびマルチビーム通信装置

Also Published As

Publication number Publication date
WO1999060806A1 (en) 1999-11-25
DE69934883D1 (de) 2007-03-08
EP1077006A4 (en) 2004-03-24
JP2002516548A (ja) 2002-06-04
US6075781A (en) 2000-06-13
DE69934883T2 (de) 2007-10-11
CN1310893A (zh) 2001-08-29
EP1077006B1 (en) 2007-01-17
AU4952099A (en) 1999-12-06
EP1077006A1 (en) 2001-02-21

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