DE69324425T2 - Einrichtung zur Messung des Träger-Rausch-Abstandes - Google Patents

Einrichtung zur Messung des Träger-Rausch-Abstandes

Info

Publication number
DE69324425T2
DE69324425T2 DE69324425T DE69324425T DE69324425T2 DE 69324425 T2 DE69324425 T2 DE 69324425T2 DE 69324425 T DE69324425 T DE 69324425T DE 69324425 T DE69324425 T DE 69324425T DE 69324425 T2 DE69324425 T2 DE 69324425T2
Authority
DE
Germany
Prior art keywords
carrier
measuring
noise ratio
noise
ratio
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.)
Expired - Lifetime
Application number
DE69324425T
Other languages
English (en)
Other versions
DE69324425D1 (de
Inventor
Itoshi Yokoyama
Masaaki Nagai
Kenichi Ishida
Kakuya Saito
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.)
Leader Electronics Corp
Original Assignee
Leader Electronics 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 Leader Electronics Corp filed Critical Leader Electronics Corp
Application granted granted Critical
Publication of DE69324425D1 publication Critical patent/DE69324425D1/de
Publication of DE69324425T2 publication Critical patent/DE69324425T2/de
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
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
DE69324425T 1992-09-18 1993-09-17 Einrichtung zur Messung des Träger-Rausch-Abstandes Expired - Lifetime DE69324425T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04250017A JP3135999B2 (ja) 1992-09-18 1992-09-18 Ｃｎ比測定装置

Publications (2)

Publication Number Publication Date
DE69324425D1 DE69324425D1 (de) 1999-05-20
DE69324425T2 true DE69324425T2 (de) 1999-08-05

Family

ID=17201611

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69324425T Expired - Lifetime DE69324425T2 (de) 1992-09-18 1993-09-17 Einrichtung zur Messung des Träger-Rausch-Abstandes

Country Status (5)

Country Link
US (1) US5450623A (de)
EP (1) EP0588662B1 (de)
JP (1) JP3135999B2 (de)
KR (1) KR100261831B1 (de)
DE (1) DE69324425T2 (de)

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Publication number Priority date Publication date Assignee Title
EP0678988B1 (de) * 1994-04-11 1999-02-03 Hewlett-Packard GmbH Rauschpegelmessungsverfahren in Gegenwart von einem Signal
US5825817A (en) * 1994-07-22 1998-10-20 Anritsu Corporation Radio wave measuring apparatus for digital communication system
ES2108620B1 (es) * 1994-12-19 1998-08-01 Instrumentacion Electronica Pr Procedimiento y aparato de medida de la relacion portadora-ruido en un canal de televison.
FR2731571A1 (fr) * 1995-03-08 1996-09-13 Philips Electronique Lab Systeme de communication muni de moyens pour tester un canal de transmission et procede de test
GB9526250D0 (en) * 1995-12-21 1996-02-21 Smith Myers Communications Ltd Channel operation monitoring in cellular communications networks
JPH10336262A (ja) * 1997-05-28 1998-12-18 Ikegami Tsushinki Co Ltd ディジタル信号の伝送品質測定回路
GB2327176B (en) * 1997-07-08 2002-04-24 Ericsson Telefon Ab L M Signal quality measurement
US5950110A (en) * 1997-08-06 1999-09-07 Interactive Techanologies, Inc. Jamming detection in a wireless security system
CA2230589C (en) * 1998-02-25 2004-02-10 Wen Tong Determining sir in a communications system
JP3560465B2 (ja) * 1998-03-17 2004-09-02 富士通株式会社 双方向通信システム及び上り通信雑音レベル判定方法
WO2000019643A1 (en) * 1998-09-28 2000-04-06 Motorola Inc. A terminal unit and a method for locating a terminal unit
US6397041B1 (en) * 1999-12-22 2002-05-28 Radio Propagation Services, Inc. Broadcast monitoring and control system
US7184473B2 (en) * 2001-04-27 2007-02-27 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7184489B2 (en) * 2001-04-27 2007-02-27 The Directv Group, Inc. Optimization technique for layered modulation
US7822154B2 (en) 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7209524B2 (en) 2001-04-27 2007-04-24 The Directv Group, Inc. Layered modulation for digital signals
US8005035B2 (en) 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
US7245671B1 (en) 2001-04-27 2007-07-17 The Directv Group, Inc. Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers
US7483505B2 (en) 2001-04-27 2009-01-27 The Directv Group, Inc. Unblind equalizer architecture for digital communication systems
US7583728B2 (en) 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7173981B1 (en) 2001-04-27 2007-02-06 The Directv Group, Inc. Dual layer signal processing in a layered modulation digital signal system
US7778365B2 (en) 2001-04-27 2010-08-17 The Directv Group, Inc. Satellite TWTA on-line non-linearity measurement
WO2004040403A2 (en) 2001-04-27 2004-05-13 The Directv Group, Inc. Lower complexity layered modulation signal processor
US7471735B2 (en) 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US7423987B2 (en) 2001-04-27 2008-09-09 The Directv Group, Inc. Feeder link configurations to support layered modulation for digital signals
US7502430B2 (en) 2001-04-27 2009-03-10 The Directv Group, Inc. Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US7639759B2 (en) 2001-04-27 2009-12-29 The Directv Group, Inc. Carrier to noise ratio estimations from a received signal
US7151807B2 (en) 2001-04-27 2006-12-19 The Directv Group, Inc. Fast acquisition of timing and carrier frequency from received signal
JP2003070056A (ja) * 2001-08-28 2003-03-07 Ntt Docomo Inc 通信チャネル設定方法、通信制御装置及び無線通信システム
AU2003280499A1 (en) 2002-07-01 2004-01-19 The Directv Group, Inc. Improving hierarchical 8psk performance
WO2004006455A1 (en) 2002-07-03 2004-01-15 The Directv Group, Inc. Method and apparatus for layered modulation
CA2392326A1 (en) * 2002-07-03 2004-01-03 Newtrax Technologies Inc. Monitoring system and method
KR100877996B1 (ko) * 2002-07-27 2009-01-12 엘아이지넥스원 주식회사 스펙트럼 분석기의 씨에이티브이 씨/엔 비율 측정방법
US6925301B2 (en) * 2002-08-19 2005-08-02 Tektronix, Inc. Remote estimation of amplifier functionality
CA2503532C (en) 2002-10-25 2011-03-01 The Directv Group, Inc. Estimating the operating point on a nonlinear traveling wave tube amplifier
US7474710B2 (en) 2002-10-25 2009-01-06 The Directv Group, Inc. Amplitude and phase matching for layered modulation reception
US7529312B2 (en) 2002-10-25 2009-05-05 The Directv Group, Inc. Layered modulation for terrestrial ATSC applications
US7463676B2 (en) 2002-10-25 2008-12-09 The Directv Group, Inc. On-line phase noise measurement for layered modulation
ES2357568T3 (es) * 2002-10-25 2011-04-27 The Directv Group, Inc. Método y aparato para adaptar los requisitos de potencia de la portadora de acuerdo con la disponibilidad en sistema de modulación en capas.
JP2005006245A (ja) * 2003-06-16 2005-01-06 Hitachi Ltd ネットワーク監視システム、再生端末または監視端末
US7502429B2 (en) 2003-10-10 2009-03-10 The Directv Group, Inc. Equalization for traveling wave tube amplifier nonlinearity measurements
US7912427B2 (en) * 2007-02-19 2011-03-22 The Directv Group, Inc. Single-wire multiswitch and channelized RF cable test meter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125809A (en) * 1977-11-09 1978-11-14 The United States Of America As Represented By The Secretary Of The Navy Digital C/kT meter
US4685065A (en) * 1985-05-23 1987-08-04 Comsonics, Inc. Portable sampling spectrum analyzer
JPS61274495A (ja) * 1985-05-29 1986-12-04 Nippon Hoso Kyokai <Nhk> Ｃｎ比測定方法および装置
JP3013408B2 (ja) * 1990-08-17 2000-02-28 ソニー株式会社 受信装置

Also Published As

Publication number Publication date
EP0588662A1 (de) 1994-03-23
JPH06102299A (ja) 1994-04-15
JP3135999B2 (ja) 2001-02-19
EP0588662B1 (de) 1999-04-14
DE69324425D1 (de) 1999-05-20
KR100261831B1 (ko) 2000-07-15
US5450623A (en) 1995-09-12
KR940008289A (ko) 1994-04-29

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Legal Events

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8364 No opposition during term of opposition