MX9708290A - Recuperacion de fase portadora en un receptor tdm/tdma. - Google Patents

Recuperacion de fase portadora en un receptor tdm/tdma.

Info

Publication number
MX9708290A
MX9708290A MX9708290A MX9708290A MX9708290A MX 9708290 A MX9708290 A MX 9708290A MX 9708290 A MX9708290 A MX 9708290A MX 9708290 A MX9708290 A MX 9708290A MX 9708290 A MX9708290 A MX 9708290A
Authority
MX
Mexico
Prior art keywords
data packet
adaptive filter
tdm
time slot
filtering
Prior art date
Application number
MX9708290A
Other languages
English (en)
Other versions
MXPA97008290A (es
Inventor
Paul William Rudkin
Original Assignee
Ionica Internat Ltd
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 Ionica Internat Ltd filed Critical Ionica Internat Ltd
Publication of MX9708290A publication Critical patent/MX9708290A/es
Publication of MXPA97008290A publication Critical patent/MXPA97008290A/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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03656—Initialisation
    • H04L2025/03668—Initialisation to the value at the end of a previous adaptation period
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042—Detectors therefor, e.g. correlators, state machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

Un desmodulador para un receptor de mensajes de datos digitales enviados en ranuras de tiempo predeterminado dentro de cuadros de tiempo de duracion fija incluye un filtro adaptativo operativo en cada paquete de datos recibidos para determinar valores de bit digitales y para adaptar los coeficientes de filtro. Los valores de coeficiente de filtro después de la filtracion de un paquete de datos en una ranura de tiempo, son utilizados como valores iniciales en la filtracion adaptativa del siguiente paquete de datos recibidos en la ranura de tiempo correspondiente del siguiente cuadro.
MXPA/A/1997/008290A 1995-04-28 1997-10-27 Recuperacion de fase portadora en un receptor tdm/tdma MXPA97008290A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9508661.7A GB9508661D0 (en) 1995-04-28 1995-04-28 Adaptive filter
GB9508661.7 1995-04-28

Publications (2)

Publication Number Publication Date
MX9708290A true MX9708290A (es) 1998-06-28
MXPA97008290A MXPA97008290A (es) 1998-10-30

Family

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Also Published As

Publication number Publication date
GB9508661D0 (en) 1995-06-14
JPH11504178A (ja) 1999-04-06
WO1996034481A3 (en) 1996-11-28
IL118017A0 (en) 1996-08-04
CN1183192A (zh) 1998-05-27
ZA963272B (en) 1997-10-24
EP0823169A2 (en) 1998-02-11
AU5342196A (en) 1996-11-18
BR9604991A (pt) 1999-06-01
WO1996034481A2 (en) 1996-10-31

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