DE3765947D1 - Beeinflussungsfreier analysator zur erfassung von kanalstoerungen. - Google Patents

Beeinflussungsfreier analysator zur erfassung von kanalstoerungen.

Info

Publication number
DE3765947D1
DE3765947D1 DE8787300040T DE3765947T DE3765947D1 DE 3765947 D1 DE3765947 D1 DE 3765947D1 DE 8787300040 T DE8787300040 T DE 8787300040T DE 3765947 T DE3765947 T DE 3765947T DE 3765947 D1 DE3765947 D1 DE 3765947D1
Authority
DE
Germany
Prior art keywords
influency
analyzer
detecting channel
channel faults
faults
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 - Fee Related
Application number
DE8787300040T
Other languages
English (en)
Inventor
William Gordon Rhind
Norman George Carder
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.)
Hewlett Packard Ltd
Original Assignee
Hewlett Packard Ltd
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 GB868601210A external-priority patent/GB8601210D0/en
Application filed by Hewlett Packard Ltd filed Critical Hewlett Packard Ltd
Application granted granted Critical
Publication of DE3765947D1 publication Critical patent/DE3765947D1/de
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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3872—Compensation for phase rotation in the demodulated signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE8787300040T 1986-01-18 1987-01-06 Beeinflussungsfreier analysator zur erfassung von kanalstoerungen. Expired - Fee Related DE3765947D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868601210A GB8601210D0 (en) 1986-01-18 1986-01-18 Analyser
GB868605576A GB8605576D0 (en) 1986-01-18 1986-03-06 Analyser

Publications (1)

Publication Number Publication Date
DE3765947D1 true DE3765947D1 (de) 1990-12-13

Family

ID=26290246

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787300040T Expired - Fee Related DE3765947D1 (de) 1986-01-18 1987-01-06 Beeinflussungsfreier analysator zur erfassung von kanalstoerungen.

Country Status (3)

Country Link
US (1) US4985900A (de)
EP (3) EP0366160A1 (de)
DE (1) DE3765947D1 (de)

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CA2128609C (en) * 1992-01-29 1997-11-25 Mickey Cleveland Rushing Modem including an equalizer for amplitude jitter
US5282225A (en) * 1992-02-04 1994-01-25 Northeastern University Adaptive blind channel equalizer system
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US5299257A (en) * 1992-02-21 1994-03-29 At&T Bell Laboratories Subscriber initiated non-intrusive network-based analysis of facsimile transmissions
JP2965781B2 (ja) * 1992-03-17 1999-10-18 富士通株式会社 Ｆｄｍモデムのアイ・パターン表示方法
DE69332139T2 (de) * 1992-04-24 2003-03-27 Oki Electric Ind Co Ltd Empfänger für digitale Nachrichtensysteme
JP3205111B2 (ja) * 1993-02-18 2001-09-04 富士通株式会社 変復調装置
JPH06343085A (ja) * 1993-04-07 1994-12-13 Hitachi Ltd 信号復調復号装置および信号復調復号方法
US5440582A (en) * 1993-05-28 1995-08-08 Motorola, Inc. Method and apparatus for determining signal usability
JP2570967B2 (ja) * 1993-07-08 1997-01-16 日本電気株式会社 Ｃｄｍａ受信機
FR2714782B1 (fr) * 1993-12-30 1996-02-02 Alcatel Telspace Estimateur en bande de base de la caractéristique amplitude/fréquence d'un signal à pluralités de phases.
CA2180100C (en) * 1994-01-12 2006-04-11 Bhavesh Bhalchandra Bhatt Higher order digital phase loop filter
US5481563A (en) * 1994-03-14 1996-01-02 Network Systems Corporation Jitter measurement using a statistically locked loop
US5778028A (en) * 1994-06-13 1998-07-07 Zenith Electronics Corporation DC removal circuit for digital signal
FR2721778B1 (fr) * 1994-06-23 1996-09-06 France Telecom Procédé d'estimation d'une erreur de phase résiduelle sur les échantillons d'un signal numérique démodulé, et procédé de correction correspondant.
JP3421452B2 (ja) * 1994-12-07 2003-06-30 富士通株式会社 非線形歪補償装置
US5751766A (en) * 1995-04-27 1998-05-12 Applied Signal Technology, Inc. Non-invasive digital communications test system
US6233274B1 (en) 1995-04-27 2001-05-15 Wavetek Wandel Goltermann Non-invasive digital cable test system
US6246715B1 (en) 1998-06-26 2001-06-12 Samsung Electronics Co., Ltd. Data transmitter and receiver of a DS-CDMA communication system
US5799037A (en) * 1996-02-16 1998-08-25 David Sarnoff Research Center Inc. Receiver capable of demodulating multiple digital modulation formats
US5872815A (en) * 1996-02-16 1999-02-16 Sarnoff Corporation Apparatus for generating timing signals for a digital television signal receiver
US6005640A (en) * 1996-09-27 1999-12-21 Sarnoff Corporation Multiple modulation format television signal receiver system
US5963594A (en) * 1996-12-31 1999-10-05 Lucent Technologies Inc. Vector tracking filter
US6075815A (en) * 1997-09-17 2000-06-13 Nortel Networks Corporation Symbol-energy-to-noise-density estimation in a QPSK modulated communication system
FR2773427B1 (fr) * 1998-01-08 2000-02-04 Alsthom Cge Alcatel Procede de securisation de transmissions d'information realisees par l'intermediaire d'un reseau de telecommunications ouvert
US5991339A (en) * 1998-01-16 1999-11-23 Intel Corporation Adaptive equalization using a minimum- jitter criterion
US6246717B1 (en) * 1998-11-03 2001-06-12 Tektronix, Inc. Measurement test set and method for in-service measurements of phase noise
US6775334B1 (en) * 1998-11-03 2004-08-10 Broadcom Corporation Equalization and decision-directed loops with trellis demodulation in high definition TV
US6275523B1 (en) * 1998-11-03 2001-08-14 Textronic, Inc. In-service measurement of transmitter nonlinearities
US6493320B1 (en) * 1999-02-12 2002-12-10 Fujitsu Limited Automatic initialization and tuning across a high speed, plesiochronous, parallel link
US6636993B1 (en) * 1999-02-12 2003-10-21 Fujitsu Limited System and method for automatic deskew across a high speed, parallel interconnection
US6249180B1 (en) * 1999-09-08 2001-06-19 Atmel Corporation Phase noise and additive noise estimation in a QAM demodulator
US6961369B1 (en) 1999-11-09 2005-11-01 Aware, Inc. System and method for scrambling the phase of the carriers in a multicarrier communications system
US7149259B1 (en) 1999-11-23 2006-12-12 Thomson Licensing Center of gravity control for hierarchical QAM transmission systems
BR0015783B1 (pt) * 1999-11-23 2015-03-03 Thomson Licensing Sa Controle de centro de gravidade para sistemas de transmissão qam hierárquicos
US6661849B1 (en) * 2000-03-28 2003-12-09 Advanced Micro Devices, Inc. Multiple payload slicer system with prenormalization integer values
US6442217B1 (en) * 2000-05-22 2002-08-27 Sicom, Inc. Digital communication receiver with digital, IF, I-Q balancer
US7106792B2 (en) 2001-06-04 2006-09-12 Qualcomm, Inc. Method and apparatus for estimating the signal to interference-plus-noise ratio of a wireless channel
US7228146B2 (en) 2001-06-26 2007-06-05 Nxp B.V. Estimating Eb/Nt in a CDMA system using power control bits
JP2003046587A (ja) * 2001-08-03 2003-02-14 Nec Corp 復調器
US20030103582A1 (en) * 2001-12-04 2003-06-05 Linsky Stuart T. Selective reed-solomon error correction decoders in digital communication systems
US6980255B2 (en) * 2002-02-13 2005-12-27 Zenith Electronics Corporation VSB modulator symbol clock processing to reduce jitter/phase noise and sampling artifacts
US7688887B2 (en) * 2003-09-02 2010-03-30 Gennum Corporation Precision adaptive equalizer
US7085561B1 (en) 2004-05-03 2006-08-01 Itt Manufacturing Enterprises, Inc. Embedded channel analysis for RF data modem
US7639736B2 (en) 2004-05-21 2009-12-29 Rambus Inc. Adaptive receive-side equalization
US7623797B2 (en) * 2004-07-14 2009-11-24 Fundacion Tarpuy Compensating impairments of optical channel using adaptive equalization
EP2375662B1 (de) 2005-01-20 2018-09-26 Rambus Inc. Hochgeschwindigkeitssignalsysteme mit anpassbarer präemphase und entzerrung
US7715472B2 (en) * 2005-10-25 2010-05-11 Broadcom Corporation Equalizer architecture for data communication
US7639737B2 (en) 2006-04-27 2009-12-29 Rambus Inc. Adaptive equalization using correlation of edge samples with data patterns
EP2498463A3 (de) 2007-01-08 2013-09-11 Rambus Inc. Adaptiver zeitkontinuierlicher Leitungsentzerrer zur Korrektur der Intersymbolinterferenz des ersten Nachläufers
US8233568B2 (en) * 2008-09-05 2012-07-31 Rajendra Kumar Adaptive receiver for high-order modulated signals over fading channels
DE102010015706A1 (de) * 2009-11-20 2011-06-01 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zum Ermitteln von Amplituden- und Phasenstörungen in einem Messsignal
TWI433480B (zh) * 2011-07-19 2014-04-01 Raydium Semiconductor Corp 可調適等化器及其運作方法
US8879669B2 (en) 2011-08-04 2014-11-04 Jds Uniphase Corporation Monitoring QAM impairments in digital communications
DE102013213657A1 (de) 2013-07-12 2015-01-15 Rohde & Schwarz Gmbh & Co. Kg Verfahren und Vorrichtung zur Messung des Amplituden- und/oder Phasenrauschens eines Signals
US9160382B2 (en) 2013-10-08 2015-10-13 Blackberry Limited Phase noise mitigation for wireless communications
CN105897629A (zh) * 2016-06-15 2016-08-24 晶晨半导体(上海)有限公司 一种信号判决器及信号判决方法
EP3324542B1 (de) * 2016-11-18 2019-10-23 Nxp B.V. Adaptiver filter mit verwaltbarer ressourcenteilung
EP3324543B1 (de) 2016-11-18 2020-01-08 Nxp B.V. Adaptives filter und verfahren zum betrieb eines adaptiven filters

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US273970A (en) * 1883-03-13 Sand-paper machine
US3727134A (en) * 1971-03-29 1973-04-10 Collins Radio Co Auto equalizer apparatus
US4381546A (en) * 1979-03-02 1983-04-26 Paradyne Corporation System for the quantitative measurement of impairments in the communication channel of a quadrature amplitude modulation data communication system
US4273970A (en) * 1979-12-28 1981-06-16 Bell Telephone Laboratories, Incorporated Intermodulation distortion test
JPS59194540A (ja) * 1983-04-19 1984-11-05 Nec Corp 自動適応型等化器
JPS59211313A (ja) * 1983-05-17 1984-11-30 Toshiba Corp 自動等化器
US4555790A (en) * 1983-06-30 1985-11-26 Betts William L Digital modem having a monitor for signal-to-noise ratio
CA1246707A (en) * 1984-02-20 1988-12-13 Botaro Hirosaki Apparatus for cancelling periodic carrier phase jitters

Also Published As

Publication number Publication date
EP0366159A1 (de) 1990-05-02
US4985900A (en) 1991-01-15
EP0233679A1 (de) 1987-08-26
EP0233679B1 (de) 1990-11-07
EP0366160A1 (de) 1990-05-02

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Legal Events

Date Code Title Description
8328 Change in the person/name/address of the agent

Free format text: SCHOPPE, F., DIPL.-ING.UNIV., PAT.-ANW., 8023 PULLACH

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee