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BR9812224A - Sintetizador de frequência, modulador de fase contìnua, e, processo para sintetizar um sinal tendo uma frequência. - Google Patents

Sintetizador de frequência, modulador de fase contìnua, e, processo para sintetizar um sinal tendo uma frequência.

Info

Publication number
BR9812224A
BR9812224A BR9812224-0A BR9812224A BR9812224A BR 9812224 A BR9812224 A BR 9812224A BR 9812224 A BR9812224 A BR 9812224A BR 9812224 A BR9812224 A BR 9812224A
Authority
BR
Brazil
Prior art keywords
frequency
modulator
signal
sym
filter
Prior art date
Application number
BR9812224-0A
Other languages
English (en)
Inventor
Paul Wilkinson Dent
Kjell Berthold Gustafsson
Hakan Bengt Eriksson
Original Assignee
Telefonaktiebolaget Lm Eicsson
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 Telefonaktiebolaget Lm Eicsson filed Critical Telefonaktiebolaget Lm Eicsson
Publication of BR9812224A publication Critical patent/BR9812224A/pt

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • H04L27/18—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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"SINTETIZADOR DE FREQUêNCIA, MODULADOR DE FASE CONTìNUA, E, PROCESSO PARA SINTETIZAR UM SINAL TENDO UMA FREQUêNCIA" Um sintetizador de frequência tem um laço travado em fase, um modulador <30><sym> e um filtro. O laço travado em fase inclui um divisor de frequência que controla a frequência do sinal de saída do laço travado em fase. A saída do modulador <30><sym> é alimentada através do filtro e a saída do filtro é usada para controlar um fator de divisão no divisor de frequência. Compensação pode ser realizada na entrada para o modulador <30><sym> a fim de compensar a filtragem realizada entre o modulador <30><sym> e o divisor de frequência. O filtro pode ser usado para reduzir ruído de quantização em uma entrada para o divisor de frequência, e por esse meio reduz ruído de fase em uma saída do laço travado em fase.
BR9812224-0A 1997-09-16 1998-09-11 Sintetizador de frequência, modulador de fase contìnua, e, processo para sintetizar um sinal tendo uma frequência. BR9812224A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/931,430 US6047029A (en) 1997-09-16 1997-09-16 Post-filtered delta sigma for controlling a phase locked loop modulator
PCT/SE1998/001623 WO1999014859A1 (en) 1997-09-16 1998-09-11 A post-filtered δς for controlling a phase locked loop m odulator

Publications (1)

Publication Number Publication Date
BR9812224A true BR9812224A (pt) 2000-07-18

Family

ID=25460777

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9812224-0A BR9812224A (pt) 1997-09-16 1998-09-11 Sintetizador de frequência, modulador de fase contìnua, e, processo para sintetizar um sinal tendo uma frequência.

Country Status (10)

Country Link
US (1) US6047029A (pt)
EP (1) EP1048110B1 (pt)
JP (1) JP4246380B2 (pt)
KR (1) KR100532899B1 (pt)
CN (1) CN1278970A (pt)
AU (1) AU746796B2 (pt)
BR (1) BR9812224A (pt)
EE (1) EE200000134A (pt)
MY (1) MY116771A (pt)
WO (1) WO1999014859A1 (pt)

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Also Published As

Publication number Publication date
EE200000134A (et) 2001-02-15
AU746796B2 (en) 2002-05-02
EP1048110B1 (en) 2003-11-26
KR20010024037A (ko) 2001-03-26
US6047029A (en) 2000-04-04
MY116771A (en) 2004-03-31
CN1278970A (zh) 2001-01-03
JP2001517013A (ja) 2001-10-02
AU9101898A (en) 1999-04-05
KR100532899B1 (ko) 2005-12-05
WO1999014859A1 (en) 1999-03-25
EP1048110A1 (en) 2000-11-02
JP4246380B2 (ja) 2009-04-02

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