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AU2001264014A1 - Digital modulation synthesizer - Google Patents

Digital modulation synthesizer

Info

Publication number
AU2001264014A1
AU2001264014A1 AU2001264014A AU6401401A AU2001264014A1 AU 2001264014 A1 AU2001264014 A1 AU 2001264014A1 AU 2001264014 A AU2001264014 A AU 2001264014A AU 6401401 A AU6401401 A AU 6401401A AU 2001264014 A1 AU2001264014 A1 AU 2001264014A1
Authority
AU
Australia
Prior art keywords
frequency modulation
accentuation
filter
pll
accentuated
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.)
Abandoned
Application number
AU2001264014A
Inventor
Corinne Brun
Guillaume Vilcocq
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.)
Nortel Networks France SAS
Original Assignee
Matra Nortel Communications SAS
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 Matra Nortel Communications SAS filed Critical Matra Nortel Communications SAS
Publication of AU2001264014A1 publication Critical patent/AU2001264014A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0991—Modifications of modulator for regulating the mean frequency using a phase locked loop including calibration means or calibration methods
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0925—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop applying frequency modulation at the divider in the feedback loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0933—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop using fractional frequency division in the feedback loop of the phase locked loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
    • H03L7/1976—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division using a phase accumulator for controlling the counter or frequency divider
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Transmitters (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Holo Graphy (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention concerns a digital modulation synthesizer for generating an output frequency or phase modulated radiofrequency signal (SOUT), comprising a pre-accentuation filter (18) receiving a frequency modulation digital signal (Fmod) in input to produce a pre-accentuated frequency modulation signal (F'mod), a modulator Sigma-Delta (15) having an input receiving the pre-accentuated frequency modulation signal (F'mod), and an output delivering a pre-accentuated and scrambled frequency modulation signal (Sc), a phase locked loop (PLL) with variable radio frequency divider (14) in the feedback path, the filtering by the phase locked loop (PLL) enabling to filter the quantizing distortion introduced by the modulator Sigma-Delta (15) and the pre-accentuation filter (18) applying a pre-accentuation to the frequency modulation signal (Fmod) enabling to compensate the effect of said filtering on the modulation inside a usful band, means for automatic calibration of the pre-accentuation filter (18) enabling further to adjust the pre-accentuation filter (18) function to that of the PLL.
AU2001264014A 2000-05-31 2001-05-23 Digital modulation synthesizer Abandoned AU2001264014A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0007059A FR2809890B1 (en) 2000-05-31 2000-05-31 DIGITAL MODULATION SYNTHESIZER
FR0007059 2000-05-31
PCT/FR2001/001606 WO2001093415A1 (en) 2000-05-31 2001-05-23 Digital modulation synthesizer

Publications (1)

Publication Number Publication Date
AU2001264014A1 true AU2001264014A1 (en) 2001-12-11

Family

ID=8850887

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001264014A Abandoned AU2001264014A1 (en) 2000-05-31 2001-05-23 Digital modulation synthesizer

Country Status (7)

Country Link
US (1) US20040041638A1 (en)
EP (1) EP1290783B1 (en)
AT (1) ATE261207T1 (en)
AU (1) AU2001264014A1 (en)
DE (1) DE60102237D1 (en)
FR (1) FR2809890B1 (en)
WO (1) WO2001093415A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7388939B2 (en) * 2001-10-31 2008-06-17 Sirf Technology, Inc. Fractional-R frequency synthesizer
US7190747B2 (en) * 2002-03-25 2007-03-13 Bae Systems Information And Electronic Systems Integration Inc. Frequency mismatch compensation for multiuser detection
DE10243382A1 (en) * 2002-06-27 2004-04-08 Infineon Technologies Ag Circuit arrangement with phase locked loop and transceiver with the circuit arrangement
US7430265B2 (en) 2002-06-27 2008-09-30 Infineon Technologies Ag Circuit arrangement provided with a phase-locked loop and transmitter-receiver with said circuit arrangement
JP4282998B2 (en) * 2003-01-08 2009-06-24 パナソニック株式会社 Modulator and correction method thereof
US7912145B2 (en) * 2003-12-15 2011-03-22 Marvell World Trade Ltd. Filter for a modulator and methods thereof
US20050215216A1 (en) * 2004-03-25 2005-09-29 Ess Technology, Inc. Sigma delta modulator loop configured to compensate amplifier noise affecting signals in the AM radio frequency band
US7477686B2 (en) * 2004-09-01 2009-01-13 Intel Corporation Apparatus and method of adaptive filter
US20080232443A1 (en) * 2007-03-23 2008-09-25 Tai-Yuan Yu Signal generating apparatus
US7382201B1 (en) * 2007-03-23 2008-06-03 Mediatek Inc. Signal generating apparatus and method thereof
US7991102B2 (en) * 2007-09-20 2011-08-02 Mediatek Inc. Signal generating apparatus and method thereof
US8081936B2 (en) * 2009-01-22 2011-12-20 Mediatek Inc. Method for tuning a digital compensation filter within a transmitter, and associated digital compensation filter and associated calibration circuit
CN102545886B (en) * 2010-12-23 2014-02-05 博通集成电路（上海）有限公司 Gaussian frequency shift keying (GFSK) modulator, GFSK modulation method and transmitter
TWI524705B (en) * 2013-05-15 2016-03-01 瑞昱半導體股份有限公司 Calibration method and calibration apparatus for communication system
CN115425969B (en) * 2022-09-14 2023-09-08 深圳市华智芯联科技有限公司 Method and device for designing compensation filter of phase-locked loop and computer equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6008703A (en) * 1997-01-31 1999-12-28 Massachusetts Institute Of Technology Digital compensation for wideband modulation of a phase locked loop frequency synthesizer
US6047029A (en) * 1997-09-16 2000-04-04 Telefonaktiebolaget Lm Ericsson Post-filtered delta sigma for controlling a phase locked loop modulator
US5952895A (en) * 1998-02-23 1999-09-14 Tropian, Inc. Direct digital synthesis of precise, stable angle modulated RF signal
EP0961412B1 (en) * 1998-05-29 2004-10-06 Motorola Semiconducteurs S.A. Frequency synthesiser

Also Published As

Publication number Publication date
FR2809890A1 (en) 2001-12-07
EP1290783A1 (en) 2003-03-12
WO2001093415A1 (en) 2001-12-06
FR2809890B1 (en) 2002-08-16
US20040041638A1 (en) 2004-03-04
ATE261207T1 (en) 2004-03-15
EP1290783B1 (en) 2004-03-03
DE60102237D1 (en) 2004-04-08

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