MX9705998A - Modulador digital con compensacion. - Google Patents

Modulador digital con compensacion.

Info

Publication number
MX9705998A
MX9705998A MX9705998A MX9705998A MX9705998A MX 9705998 A MX9705998 A MX 9705998A MX 9705998 A MX9705998 A MX 9705998A MX 9705998 A MX9705998 A MX 9705998A MX 9705998 A MX9705998 A MX 9705998A
Authority
MX
Mexico
Prior art keywords
compensation
encoder
digital
correlater
sent
Prior art date
Application number
MX9705998A
Other languages
English (en)
Other versions
MXPA97005998A (es
Inventor
Louis J Vannatta
William P Alberth Jr
Terrie L Frane
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of MXPA97005998A publication Critical patent/MXPA97005998A/es
Publication of MX9705998A publication Critical patent/MX9705998A/es

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
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)

Abstract

En un modulador digital con compensacion, se envían a un codificador (720) una corriente de bits digital proveniente de un microfono (705), de un codificador de voz (706), y un codificador de canal (707), el cual traduce los bits a impulsos digitales I/Q con manipulacion por desplazamiento de fase. Un correlacionador de símbolo (730) indica cuando las secuencias de símbolo de fase objetivo predeterminadas que contribuye a una alta proporcion de energía pico-a-promedio, entran al codificador. Si se encuentra una secuencia de símbolo objetivo, el correlacionador dirige los amplificadores de compensacion o los filtros de compensacion (734, 737) de las señales I/Q. A continuacion, los filtros conformadores de impulso I/Q (764, 765) de los impulsos I/Q filtran los impulsos I/Q de acuerdo a las especificaciones del sistema de comunicacion. Las señales filtradas I/Q se envían entonces a un modulador de cuadratura (790) para la modulacion de RF. La compensacion de las secuencias de símbolo objetivo reducen el impacto negativo que tienen en la proporcion de energía pico-a-promedio e incrementar la eficiencia del amplificador de energía (795) el cual extiende la vida de la batería de un dispositivo de comunicacion (700).
MX9705998A 1996-08-08 1997-08-06 Modulador digital con compensacion. MX9705998A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/694,004 US5930299A (en) 1996-08-08 1996-08-08 Digital modulator with compensation and method therefor
US08694004 1996-08-08

Publications (2)

Publication Number Publication Date
MXPA97005998A MXPA97005998A (es) 1998-02-01
MX9705998A true MX9705998A (es) 1998-02-28

Family

ID=24787039

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9705998A MX9705998A (es) 1996-08-08 1997-08-06 Modulador digital con compensacion.

Country Status (4)

Country Link
US (2) US5930299A (es)
JP (1) JP4097746B2 (es)
CN (1) CN1099181C (es)
MX (1) MX9705998A (es)

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Also Published As

Publication number Publication date
US6421379B1 (en) 2002-07-16
CN1175836A (zh) 1998-03-11
JP4097746B2 (ja) 2008-06-11
JPH1093448A (ja) 1998-04-10
CN1099181C (zh) 2003-01-15
US5930299A (en) 1999-07-27

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MM Annulment or lapse due to non-payment of fees