NO914514L - Kvadratur-modulasjonskrets - Google Patents

Kvadratur-modulasjonskrets

Info

Publication number
NO914514L
NO914514L NO91914514A NO914514A NO914514L NO 914514 L NO914514 L NO 914514L NO 91914514 A NO91914514 A NO 91914514A NO 914514 A NO914514 A NO 914514A NO 914514 L NO914514 L NO 914514L
Authority
NO
Norway
Prior art keywords
modulation circuit
quadrature modulation
quadrature
phase channel
symmetry
Prior art date
Application number
NO91914514A
Other languages
English (en)
Other versions
NO914514D0 (no
Inventor
Yasushi Iwane
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of NO914514D0 publication Critical patent/NO914514D0/no
Publication of NO914514L publication Critical patent/NO914514L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2017—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation
    • 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
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
    • H04L25/03859—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping shaping using look up tables for partial waveforms

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

En kvadraturmodulasjonskrets omfatter et lavpassfilter som opererer ved en tidsdelings- prosess for i-fasekanalen og kvadraturfase- kanalen, og reduserer behovet for adressedata ved å benytte bolgeformens amplitudesymmetri og/eller bolgeformens symmetri på tidsaksen. Nødvendig kapasitet av ROM reduseres med halvde- len eller mer, og konfigurasjonen av kvadratur- modulasjonskretsen forenkles.
NO91914514A 1991-01-11 1991-11-18 Kvadratur-modulasjonskrets NO914514L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3012645A JP2968350B2 (ja) 1991-01-11 1991-01-11 直交変調回路

Publications (2)

Publication Number Publication Date
NO914514D0 NO914514D0 (no) 1991-11-18
NO914514L true NO914514L (no) 1992-07-13

Family

ID=11811105

Family Applications (1)

Application Number Title Priority Date Filing Date
NO91914514A NO914514L (no) 1991-01-11 1991-11-18 Kvadratur-modulasjonskrets

Country Status (5)

Country Link
US (1) US5285479A (no)
EP (2) EP0494696B1 (no)
JP (1) JP2968350B2 (no)
DE (2) DE69233017T2 (no)
NO (1) NO914514L (no)

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US5487089A (en) * 1992-02-17 1996-01-23 Matsushita Electric Industrial Co., Ltd. Nyquist filter for digital modulation
US5420887A (en) * 1992-03-26 1995-05-30 Pacific Communication Sciences Programmable digital modulator and methods of modulating digital data
US5530722A (en) * 1992-10-27 1996-06-25 Ericsson Ge Mobile Communications Inc. Quadrature modulator with integrated distributed RC filters
DE69324789T2 (de) * 1993-01-29 1999-09-16 St Microelectronics Srl Verfahren zur Filterung digitaler Signale mit hoher Auslösung und entsprechendem Aufbau digitaler Filter
KR0165277B1 (ko) * 1993-02-27 1999-03-20 김광호 디지탈신호 자기 기록 재생장치
JPH06315039A (ja) * 1993-04-30 1994-11-08 Toshiba Corp π／４シフトＤＱＰＳＫ変調器
EP1331778B1 (en) * 1993-06-25 2005-06-01 Matsushita Electric Industrial Co., Ltd. Waveform shaping method and equipment
US5541961A (en) * 1994-08-15 1996-07-30 At&T Corp. Digitally controlled high resolution hybrid phase synthesizer
US5523726A (en) * 1994-10-13 1996-06-04 Westinghouse Electric Corporation Digital quadriphase-shift keying modulator
US5764693A (en) * 1994-11-14 1998-06-09 Research In Motion Limited Wireless radio modem with minimal inter-device RF interference
US5619531A (en) * 1994-11-14 1997-04-08 Research In Motion Limited Wireless radio modem with minimal interdevice RF interference
JP3454623B2 (ja) * 1995-11-28 2003-10-06 三洋電機株式会社 π／４シフトＱＰＳＫ直交変調装置
US6320914B1 (en) * 1996-12-18 2001-11-20 Ericsson Inc. Spectrally efficient modulation using overlapped GMSK
KR100237380B1 (ko) * 1997-06-16 2000-01-15 이계철 고속 롬 기반 나이퀴스트 유한 임펄스 응답 필터
US6459742B1 (en) 1997-08-04 2002-10-01 Eads Defence And Security Networks Digital modulation process and modulator implementing the process
FR2767002B1 (fr) * 1997-08-04 1999-10-08 Matra Communication Procede de modulation numerique, et modulateur mettant en oeuvre un tel procede
US6757826B1 (en) 1998-04-14 2004-06-29 Citicorp Development Center, Inc. Digital graphic signature system
US6359936B1 (en) * 1998-10-30 2002-03-19 Winbond Electronics Corp. Modulator employing a memory reduction circuit
US7542520B1 (en) * 1999-12-02 2009-06-02 Qualcomm Incorporated Apparatus and method for implementing a low complexity digital modulator
EP1324624A4 (en) * 2000-08-31 2007-11-07 Huawei Tech Co Ltd METHOD AND DEVICES FOR 8PSK MODULATION
GB2368244A (en) * 2000-10-10 2002-04-24 Seiko Epson Corp Signal processor with look-up table for modulating data
JP3703083B2 (ja) * 2001-01-10 2005-10-05 松下電器産業株式会社 波形発生装置
US7103108B1 (en) * 2001-05-17 2006-09-05 Cypress Semiconductor Corp. Digital signal processor transceiver
US7065157B2 (en) * 2003-03-11 2006-06-20 Qualcomm Inc. GMSK modulation techniques
DE102005053723A1 (de) * 2005-11-10 2007-05-24 Rohde & Schwarz Gmbh & Co. Kg Schaltung zur Signalaufbereitung mit gemeinsamen Oszillator
US7916808B2 (en) * 2005-12-23 2011-03-29 Texas Instruments Incorporated 8PSK modulator
CN103190076A (zh) 2010-08-30 2013-07-03 物理设备有限责任公司 可调谐滤波器设备和方法
US9042857B2 (en) 2010-08-30 2015-05-26 Physical Devices, Llc Methods, systems, and non-transitory computer readable media for wideband frequency and bandwidth tunable filtering
US8520774B1 (en) * 2010-12-23 2013-08-27 Arris Enterprises, Inc. Generation of radio frequency outputs
WO2013130818A1 (en) 2012-02-28 2013-09-06 Physical Devices Llc Methods, systems, and computer readable media for mitigation of in-band interference of global positioning system (gps) signals
US20150244431A1 (en) 2014-02-21 2015-08-27 Physical Devices, Llc Devices and methods for diversity signal enhancement and cosite cancellation

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US3971996A (en) * 1973-01-18 1976-07-27 Hycom Incorporated Phase tracking network
NL178640C (nl) * 1976-07-12 1986-04-16 Philips Nv Digitale signaalbewerkingsinrichting.
DE2913669C2 (de) * 1979-04-05 1981-12-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Erzeugen von Modem-Sendesignalen mit Quadratur-Amplituden-Modulation QAM
US4613976A (en) * 1984-05-02 1986-09-23 British Columbia Telephone Company Constant envelope offset QPSK modulator
JPS60254909A (ja) * 1984-05-31 1985-12-16 Nippon Precision Saakitsutsu Kk デイジタルフイルタ
NL8402318A (nl) * 1984-07-23 1986-02-17 Philips Nv Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen.
WO1986003356A1 (en) * 1984-11-22 1986-06-05 Devon County Council Data modem system
JP2510490B2 (ja) * 1985-04-10 1996-06-26 株式会社日立製作所 デイジタル変調器
JPH0642683B2 (ja) * 1986-09-20 1994-06-01 富士通株式会社 デイジタル位相変調回路
JP2595961B2 (ja) * 1987-04-03 1997-04-02 日本電気株式会社 デイジタル変復調システム
IE69762B1 (en) * 1988-11-30 1996-10-02 Motorola Inc Digital gmsk modulator with non-integer bit interval handling
US5091705A (en) * 1989-04-07 1992-02-25 Sharp Kabushiki Kaisha Fm modulator
JPH02295260A (ja) * 1989-05-10 1990-12-06 Toshiba Corp 変調器
US4953184A (en) * 1989-06-01 1990-08-28 Motorola, Inc. Complex bandpass digital filter
US5140613A (en) * 1990-05-25 1992-08-18 Hewlett-Packard Company Baseband modulation system with improved ROM-based digital filter
KR950003666B1 (ko) * 1990-12-31 1995-04-17 삼성전자 주식회사 지엠에스케이신호복조방법 및 그 장치

Also Published As

Publication number Publication date
US5285479A (en) 1994-02-08
DE69233017D1 (de) 2003-05-22
NO914514D0 (no) 1991-11-18
EP0494696B1 (en) 1999-04-07
EP0776110A3 (en) 1997-07-30
EP0494696A2 (en) 1992-07-15
EP0494696A3 (en) 1993-05-12
DE69233017T2 (de) 2004-03-25
DE69228839D1 (de) 1999-05-12
JPH04239245A (ja) 1992-08-27
EP0776110A2 (en) 1997-05-28
EP0776110B1 (en) 2003-04-16
JP2968350B2 (ja) 1999-10-25
DE69228839T2 (de) 1999-11-25

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