CA2173530A1 - Modulation and Demodulation Method, Modulator and Demodulator - Google Patents

Modulation and Demodulation Method, Modulator and Demodulator

Info

Publication number
CA2173530A1
CA2173530A1 CA2173530A CA2173530A CA2173530A1 CA 2173530 A1 CA2173530 A1 CA 2173530A1 CA 2173530 A CA2173530 A CA 2173530A CA 2173530 A CA2173530 A CA 2173530A CA 2173530 A1 CA2173530 A1 CA 2173530A1
Authority
CA
Canada
Prior art keywords
signal
amplitude
modulating
amplitude ratio
transmitted
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.)
Granted
Application number
CA2173530A
Other languages
French (fr)
Other versions
CA2173530C (en
Inventor
Yoshifumi Suzuki
Tadashi Shirato
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of CA2173530A1 publication Critical patent/CA2173530A1/en
Application granted granted Critical
Publication of CA2173530C publication Critical patent/CA2173530C/en
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
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • 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
    • H04L27/389—Demodulator circuits; Receiver circuits with separate demodulation for the phase and amplitude components

Abstract

A modulation and demodulation method for communication between a transmitting side and a receiving side includes a step of at the transmitting side, producing a modulating signal, an amplitude ratio of a current instantaneous amplitude of the modulating signal and an instantaneous amplitude at n symbols previously in time (n is a natural number) of the modulating signal being set to correspond to a code to be transmitted, a step of at the transmitting side, modulating a carrier with a radio frequency or an intermediate frequency by the modulating signal to provide and transmit a modulated signal, a step of at the receiving side, receiving the transmitted modulated signal to provide a received signal, and a step of at the receiving side, deciding the transmitted code from an amplitude ratio of an instantaneous amplitude of a signal point in a signal space and an instantaneous amplitude of the signal point in the signal space n symbols previously in time with respect to the received signal. A first amplitude ratio value equal to or smaller than 1 and a second amplitude ratio value equal to or greater than 1 are prepared. The amplitude ratio is selected one of the first and second amplitude values so as to prevent the modulating signal from converging to zero and from diverging.
CA002173530A 1995-04-11 1996-04-04 Modulation and demodulation method, modulator and demodulator Expired - Fee Related CA2173530C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP109179/1995 1995-04-11
JP10917995 1995-04-11
JP205138/1995 1995-07-20
JP20513895A JP3455934B2 (en) 1995-04-11 1995-07-20 Modulator

Publications (2)

Publication Number Publication Date
CA2173530A1 true CA2173530A1 (en) 1996-10-12
CA2173530C CA2173530C (en) 1999-12-28

Family

ID=26448959

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002173530A Expired - Fee Related CA2173530C (en) 1995-04-11 1996-04-04 Modulation and demodulation method, modulator and demodulator

Country Status (5)

Country Link
US (1) US5818875A (en)
EP (1) EP0738064B1 (en)
JP (1) JP3455934B2 (en)
CA (1) CA2173530C (en)
DE (1) DE69628692T2 (en)

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WO1998035477A1 (en) * 1997-02-05 1998-08-13 Symbionics Ltd. Demodulation with separate branches for phase and amplitude
JP3033708B2 (en) * 1997-04-21 2000-04-17 埼玉日本電気株式会社 Peak clipping circuit and quadrature modulation transmitter having the peak clipping circuit
JP2000201132A (en) * 1998-11-06 2000-07-18 Matsushita Electric Ind Co Ltd Transmitter-receiver
EP1017201A1 (en) 1998-12-29 2000-07-05 Alcatel QAM receiver with separate detection of phase and amplitude
US6389080B1 (en) * 1999-03-06 2002-05-14 Lockheed Martin Corp. Random phase shift keying
US6198779B1 (en) * 1999-05-05 2001-03-06 Motorola Method and apparatus for adaptively classifying a multi-level signal
WO2001011844A1 (en) * 1999-08-06 2001-02-15 Mitsubishi Denki Kabushiki Kaisha Orthogonal demodulator and method for orthogonal demodulation
US6934344B2 (en) * 2000-03-27 2005-08-23 Interdigital Technology Corporation Digital automatic gain control
US7424039B2 (en) * 2003-03-28 2008-09-09 Nortel Networks Limited Method and apparatus for processing multiple common frequency signals through a single cable
US7782827B2 (en) * 2003-03-28 2010-08-24 Nortel Networks Limited Method and apparatus for processing multiple common frequency signals through a single cable using circulators
US8494071B2 (en) * 2003-12-08 2013-07-23 Kabushiki Kaisha Kenwood Device and method for correcting a data error in communication path
JP4220365B2 (en) * 2003-12-08 2009-02-04 株式会社ケンウッド Transmitting apparatus, receiving apparatus, data transmitting method, and data receiving method
JP4388366B2 (en) * 2003-12-26 2009-12-24 株式会社ケンウッド Transmission device, reception device, data transmission method, data reception method, and program
US7729726B2 (en) 2004-03-26 2010-06-01 Nortel Networks Limited Feeder cable reduction
US8135086B1 (en) 2004-08-09 2012-03-13 Rockstar Bidco, LP Cable reduction
JP4542405B2 (en) * 2004-09-30 2010-09-15 株式会社ケンウッド Baseband signal generation apparatus, baseband signal generation method, and program
TWI280017B (en) * 2005-10-03 2007-04-21 Ind Tech Res Inst Communication system with demodulation of two-level differential amplitude-shift-keying signals and method thereof
CN1946072B (en) * 2005-10-08 2010-05-12 财团法人工业技术研究院 Communication system with two bit differentical type amplitude shift modulation and demodulation
US8452333B2 (en) * 2005-12-12 2013-05-28 Apple Inc. Feeder cable reduction
JP5153673B2 (en) * 2009-02-09 2013-02-27 三菱電機株式会社 Optical communication receiver
JP6074712B2 (en) * 2012-04-03 2017-02-08 パナソニックＩｐマネジメント株式会社 Video data transmitter and receiver
US9009503B2 (en) 2012-07-05 2015-04-14 International Business Machines Corporation Branch circuit determination without external synchronization
EP2926109B1 (en) * 2012-12-03 2020-02-05 Dockon AG In medium communication system using log detector amplifier
KR102332682B1 (en) * 2013-03-15 2021-12-02 도콘 아게 Frequency selective logarithmic amplifier with intrinsic frequency demodulation capability
EP2797225B1 (en) * 2013-04-24 2018-01-10 Analog Devices Global Method of and apparatus for demodulating an amplitude modulated signal
US11082014B2 (en) 2013-09-12 2021-08-03 Dockon Ag Advanced amplifier system for ultra-wide band RF communication
US11183974B2 (en) * 2013-09-12 2021-11-23 Dockon Ag Logarithmic detector amplifier system in open-loop configuration for use as high sensitivity selective receiver without frequency conversion
KR102226416B1 (en) * 2013-09-12 2021-03-11 도콘 아게 Logarithmic detector amplifier system for use as high sensitivity selective receiver without frequency conversion
CN114401176B (en) * 2021-12-31 2023-05-09 北京升哲科技有限公司 Signal arrival detection method and device, electronic equipment and storage medium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413108B1 (en) * 1989-06-21 1995-04-26 Nec Corporation Method of detecting a particular signal sequence which reduces the effects of multipath transmission
US5335359A (en) * 1990-05-31 1994-08-02 Nec Corporation Diversity receiver using matched filter and decision feedback equalizer
JP3342877B2 (en) * 1991-05-27 2002-11-11 株式会社東芝 Digital wireless communication device and its modulation circuit
JPH0744473B2 (en) * 1993-02-02 1995-05-15 日本電気株式会社 Demodulation system
US5535244A (en) * 1993-06-07 1996-07-09 Matsushita Electric Industrial Co., Ltd. Digital modulating/demodulating apparatus and a digital demodulating apparatus
JPH06350657A (en) * 1993-06-07 1994-12-22 Matsushita Electric Ind Co Ltd Digital modulation demodulation device

Also Published As

Publication number Publication date
EP0738064A3 (en) 1998-03-18
JP3455934B2 (en) 2003-10-14
CA2173530C (en) 1999-12-28
EP0738064A2 (en) 1996-10-16
US5818875A (en) 1998-10-06
DE69628692D1 (en) 2003-07-24
JPH08340365A (en) 1996-12-24
DE69628692T2 (en) 2003-12-18
EP0738064B1 (en) 2003-06-18

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Legal Events

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