ZA903332B - Multi-carrier high speed modem - Google Patents

Multi-carrier high speed modem

Info

Publication number
ZA903332B
ZA903332B ZA903332A ZA903332A ZA903332B ZA 903332 B ZA903332 B ZA 903332B ZA 903332 A ZA903332 A ZA 903332A ZA 903332 A ZA903332 A ZA 903332A ZA 903332 B ZA903332 B ZA 903332B
Authority
ZA
South Africa
Prior art keywords
high speed
speed modem
carrier high
carrier
modem
Prior art date
Application number
ZA903332A
Other languages
English (en)
Inventor
W Kurt Dobson
Kurt Dobson W
Donald L Chaffee
L Chaffee Donald
Original Assignee
Intelligent Modem 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 Intelligent Modem Corp filed Critical Intelligent Modem Corp
Publication of ZA903332B publication Critical patent/ZA903332B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
ZA903332A 1989-05-02 1990-05-02 Multi-carrier high speed modem ZA903332B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/346,069 US4943980A (en) 1989-05-02 1989-05-02 Multi-carrier high speed modem

Publications (1)

Publication Number Publication Date
ZA903332B true ZA903332B (en) 1991-02-27

Family

ID=23357801

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA903332A ZA903332B (en) 1989-05-02 1990-05-02 Multi-carrier high speed modem

Country Status (9)

Country Link
US (1) US4943980A (xx)
EP (1) EP0396049A3 (xx)
JP (1) JPH0364145A (xx)
KR (1) KR900019426A (xx)
CN (1) CN1056197A (xx)
AU (1) AU5450890A (xx)
BR (1) BR9002023A (xx)
CA (1) CA2014354A1 (xx)
ZA (1) ZA903332B (xx)

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407673B1 (en) * 1989-07-12 1994-05-11 International Business Machines Corporation Process of synchronizing a receiving modem after a training on data
GB9123376D0 (en) * 1991-11-04 1991-12-18 British Broadcasting Corp Coding method for broadcast transmissions
DE4243787C1 (de) * 1992-12-23 1994-05-26 Grundig Emv Verfahren und Vorrichtung zur Beseitigung des Frequenzversatzes in Empfangssignalen eines digitalen Übertragungssystems
EP0617531A1 (en) * 1993-03-25 1994-09-28 Matsushita Electric Industrial Co., Ltd. Multiresolution transmission system
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
GB2296407B (en) * 1994-12-22 1999-10-06 Roke Manor Research Frequency hopped cellular mobile radio systems
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
US5521908A (en) * 1995-04-20 1996-05-28 Tellabs Operations Inc. Method and apparatus for providing reduced complexity echo cancellation in a multicarrier communication system
US6002722A (en) * 1996-05-09 1999-12-14 Texas Instruments Incorporated Multimode digital modem
US5809069A (en) * 1996-07-19 1998-09-15 Texas Instruments Incorporated Frequency-domain carrierless AM-PM demodulator
JPH1065588A (ja) * 1996-08-23 1998-03-06 Sony Corp 振幅・位相補正回路、受信装置及び送信装置
DE69717285T2 (de) * 1996-09-02 2003-09-04 St Microelectronics Nv Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme
ATE227911T1 (de) * 1996-09-02 2002-11-15 St Microelectronics Nv Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme
US20030026282A1 (en) * 1998-01-16 2003-02-06 Aware, Inc. Splitterless multicarrier modem
JPH11136180A (ja) * 1997-10-31 1999-05-21 Sony Corp データ通信方法、送信装置及びセルラー無線通信システム
US6169744B1 (en) 1998-01-07 2001-01-02 3Com Corporation Method and protocol for a medium access control layer for local area networks with multiple-priority traffic
US6891887B1 (en) 1998-05-27 2005-05-10 3Com Corporation Multi-carrier LAN adapter device using interpolative equalizer
US6704317B1 (en) 1998-05-27 2004-03-09 3Com Corporation Multi-carrier LAN modem server
US6507585B1 (en) 1998-05-27 2003-01-14 3Com Corporation Multi-carrier LAN adapter device using frequency domain equalizer
US6603811B1 (en) 1998-05-29 2003-08-05 3Com Corporation Low complexity frequency domain equalizer having fast re-lock
US6377683B1 (en) 1998-05-29 2002-04-23 3Com Corporation Low complexity frequency domain echo canceller for DMT transceivers
US6502138B2 (en) * 1998-09-25 2002-12-31 Intel Corporation Modem with code execution adapted to symbol rate
US6560276B1 (en) * 1998-09-25 2003-05-06 Intel Corporation Synchronization techniques using an interpolation filter
US6374312B1 (en) * 1998-09-25 2002-04-16 Intel Corporation System for dedicating a host processor to running one of a plurality of modem programs and dedicating a DSP to running another one of the modem programs
US6490628B2 (en) * 1998-09-25 2002-12-03 Intel Corporation Modem using a digital signal processor and a signal based command set
US6711206B1 (en) 1998-09-25 2004-03-23 Intel Corporation Modem using a digital signal processor and separate transmit and receive sequencers
US6661848B1 (en) 1998-09-25 2003-12-09 Intel Corporation Integrated audio and modem device
US6711205B1 (en) 1998-09-25 2004-03-23 Intel Corporation Tone detector for use in a modem
US6625208B2 (en) * 1998-09-25 2003-09-23 Intel Corporation Modem using batch processing of signal samples
US6667986B1 (en) 1998-10-01 2003-12-23 Utstarcom Incorporated System and method for providing high-speed data access using a distributed modem
US6452987B1 (en) * 1998-11-25 2002-09-17 Lucent Technologies Inc. Fast start-up in discrete multi-tone (DMT) based communications system
US6553518B1 (en) 1999-03-08 2003-04-22 International Business Machines Corporation Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations
US6661847B1 (en) 1999-05-20 2003-12-09 International Business Machines Corporation Systems methods and computer program products for generating and optimizing signal constellations
US6674856B1 (en) * 1999-09-23 2004-01-06 Agere Systems Inc. Placement of a transmit predistortion filter with respect to a data access arrangement
US6826157B1 (en) 1999-10-29 2004-11-30 International Business Machines Corporation Systems, methods, and computer program products for controlling data rate reductions in a communication device by using a plurality of filters to detect short-term bursts of errors and long-term sustainable errors
US6792040B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Modems having a dual power mode capability and methods of operating same
US6792004B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of robbed-bit signaling based on proximity
US6754258B1 (en) 1999-10-29 2004-06-22 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns
US6611563B1 (en) 1999-10-29 2003-08-26 International Business Machines Corporation Systems, methods and computer program products for data mode refinement of modem constellation points
US6505222B1 (en) 1999-10-29 2003-01-07 International Business Machines Corporation Systems methods and computer program products for controlling undesirable bias in an equalizer
US6662322B1 (en) 1999-10-29 2003-12-09 International Business Machines Corporation Systems, methods, and computer program products for controlling the error rate in a communication device by adjusting the distance between signal constellation points
US6823004B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Methods, systems and computer program products for monitoring performance of a modem during a connection
US6823017B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Systems, methods and computer program products for filtering glitches from measured values in a sequence of code points
US6967995B1 (en) 1999-10-29 2005-11-22 International Business Machines Corporation Methods, systems and computer program products for carrier drop detection using a variable threshold
US6839382B1 (en) 1999-10-29 2005-01-04 International Business Machines Corporation System, methods and computer program products for identifying digital impairments in modem signals using signature analysis and signal level comparison analysis
US6816545B1 (en) 1999-10-29 2004-11-09 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modems based on clusters and/or skips in pulse code modulation signal levels
US6765955B1 (en) 1999-10-29 2004-07-20 International Business Machines Corporation Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise
US6650657B1 (en) 1999-10-29 2003-11-18 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modem signals
DE10015257A1 (de) * 2000-03-28 2001-10-04 Rohde & Schwarz Verfahren zum Übertragen von OFDM-Signalen
US6731695B2 (en) * 2001-03-27 2004-05-04 Aware, Inc. Systems and methods for implementing receiver transparent Q-mode
US20060203927A1 (en) * 2001-03-27 2006-09-14 Aware, Inc. Systems and methods for implementing receiver transparent Q-mode
US7075999B2 (en) 2002-04-19 2006-07-11 Texas Instruments Incorporated Multicarrier modulation with data dependent frequency-domain redundancy
EP1713221B1 (de) * 2005-04-12 2007-09-26 Nokia Siemens Networks Gmbh & Co. Kg Verfahren zur Reduzierung einer Intersymbol-Interferenzenergie
CN101083504B (zh) * 2007-07-23 2011-09-07 沖电气（新加坡）技术中心 解调装置及其解调方法
CN108023850B (zh) * 2017-11-17 2021-01-08 深圳市锐能微科技有限公司 一种无线通信方法及装置
CN108461087B (zh) * 2018-02-07 2020-06-30 河南芯盾网安科技发展有限公司 数字信号穿过声码器的装置及方法
US10841145B1 (en) * 2019-06-17 2020-11-17 Envistacom, Llc Multi-rotational waveform utilizing a plurality of transmission waveforms and transmission paths

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206320A (en) * 1978-08-21 1980-06-03 University Of Illinois Foundation High speed modem suitable for operating with a switched network
US4381428A (en) * 1981-05-11 1983-04-26 The United States Of America As Represented By The Secretary Of The Navy Adaptive quantizer for acoustic binary information transmission
US4495620A (en) * 1982-08-05 1985-01-22 At&T Bell Laboratories Transmitting data on the phase of speech
US4734920A (en) * 1984-10-10 1988-03-29 Paradyne Corporation High speed modem for multiple communication circuits
US4679227A (en) * 1985-05-20 1987-07-07 Telebit Corporation Ensemble modem structure for imperfect transmission media

Also Published As

Publication number Publication date
BR9002023A (pt) 1991-08-13
KR900019426A (ko) 1990-12-24
CA2014354A1 (en) 1990-11-02
AU5450890A (en) 1990-11-08
EP0396049A2 (en) 1990-11-07
US4943980A (en) 1990-07-24
CN1056197A (zh) 1991-11-13
EP0396049A3 (en) 1992-09-16
JPH0364145A (ja) 1991-03-19

Similar Documents

Publication Publication Date Title
ZA903332B (en) Multi-carrier high speed modem
GB8717217D0 (en) Modem
EP0440190A3 (en) Modem having speed notifying means
GB9013569D0 (en) Variable speed transaxle
GB2234846B (en) High speed searching
EP0417390A3 (en) Gmsk narrowband modem
HK1006585A1 (en) Rotary vee engine
EP0235728A3 (en) Block copolymers having polysiloxane segments
EP0436396A3 (en) Speed indicator
GB8925868D0 (en) Oscillatory rotating engine
IL91273A0 (en) High speed boat
GB2191583B (en) Speed reduction indicator
GB8927920D0 (en) Variable speed transaxle
GB8803083D0 (en) Tachometer
EP0405937A3 (en) Speed change device
GB8613113D0 (en) Counter rotating engine
GB8907984D0 (en) Rotary engine
GB8910680D0 (en) Rotary engine
GB2197541B (en) Modem
EP0507946A4 (en) High speed operation system
KR890006827Y1 (en) High speed electroplating device
AU104921S (en) Speed restriction hump
GB8628702D0 (en) Speed change mechanisms
GB8624158D0 (en) High speed knitting machine
AU107502S (en) Speed indicator