AR025612A1 - METHOD AND PROVISION IN A TELECOMMUNICATIONS SYSTEM - Google Patents

METHOD AND PROVISION IN A TELECOMMUNICATIONS SYSTEM

Info

Publication number
AR025612A1
AR025612A1 ARP000104726A ARP000104726A AR025612A1 AR 025612 A1 AR025612 A1 AR 025612A1 AR P000104726 A ARP000104726 A AR P000104726A AR P000104726 A ARP000104726 A AR P000104726A AR 025612 A1 AR025612 A1 AR 025612A1
Authority
AR
Argentina
Prior art keywords
samples
demodulator
receiver
reducing
signal
Prior art date
Application number
ARP000104726A
Other languages
Spanish (es)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of AR025612A1 publication Critical patent/AR025612A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H04B1/0014—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0039—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

La presente invencion se relaciona con un sistema de comunicacion de Acceso Multiple por Division de Codigo (CDMA), más particularmente a una disposicion ya un método en un receptor (10) para simplificar y mejorar el procesamiento de senal en undes modulador (11) del receptor (10) por medio de la reduccion delalcance dinámico de larga duracion de las senales recibidas, y de esta manera, reducir la cantidad de bits que se necesitan para la codificacion de dichassenales. Esto se logramediante me dios de procesamiento de senal (16) en las trayectorias de entrada de senal enfrente del desmodulador (11), dichos medios(16), que incluyen por lo menos una unidad digital de control de ganancia automático (161) mejorada, la cual integralas muestras de senal que ingresan a unnivel de potencia constante y comun, y que incluye una unidad de cuantificador subsiguiente (162), la cual transforma las muestras de senal integradas amuestras que utilizan una cantidad reducida de bits.Debido a esto, el ancho de banda de transmision en la unidad receptora es reducido y el procesamiento desenal en el desmodulador es menos complejo.The present invention relates to a Multiple Access by Code Division (CDMA) communication system, more particularly to an arrangement and method in a receiver (10) to simplify and improve signal processing in modulator units (11) of the receiver (10) by means of reducing the long-term dynamic range of the received signals, and thus, reducing the amount of bits needed for the coding of said signals. This is achieved by means of signal processing (16) in the signal input paths in front of the demodulator (11), said means (16), which include at least one improved digital automatic gain control unit (161), which integrates signal samples that enter at a constant and common power level, and that includes a subsequent quantifier unit (162), which transforms the integrated signal samples to samples that use a reduced amount of bits. Transmission bandwidth in the receiving unit is reduced and the desalting processing in the demodulator is less complex.

ARP000104726A 1999-09-10 2000-09-08 METHOD AND PROVISION IN A TELECOMMUNICATIONS SYSTEM AR025612A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9903235A SE9903235L (en) 1999-09-10 1999-09-10 Method and apparatus of a telecommunication system

Publications (1)

Publication Number Publication Date
AR025612A1 true AR025612A1 (en) 2002-12-04

Family

ID=20416947

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP000104726A AR025612A1 (en) 1999-09-10 2000-09-08 METHOD AND PROVISION IN A TELECOMMUNICATIONS SYSTEM

Country Status (7)

Country Link
JP (1) JP4488332B2 (en)
AR (1) AR025612A1 (en)
AU (1) AU7464100A (en)
GB (1) GB2374216B (en)
SE (1) SE9903235L (en)
TW (1) TW507429B (en)
WO (1) WO2001020807A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100934352B1 (en) 2005-01-18 2009-12-30 가부시키가이샤 엔티티 도코모 A method of controlling a mobile communication terminal and a plurality of receivers mounted in the mobile communication terminal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5299226A (en) * 1990-11-16 1994-03-29 Interdigital Technology Corporation Adaptive power control for a spread spectrum communications system and method
US5566201A (en) * 1994-09-27 1996-10-15 Nokia Mobile Phones Ltd. Digital AGC for a CDMA radiotelephone
US5574747A (en) * 1995-01-04 1996-11-12 Interdigital Technology Corporation Spread spectrum adaptive power control system and method
JPH08335928A (en) * 1995-06-07 1996-12-17 Oki Electric Ind Co Ltd Receiver
DE69717128T2 (en) * 1996-09-02 2003-07-10 St Microelectronics Nv IMPROVEMENTS TO OR WITH REGARD TO MULTI-CARRIER TRANSFER SYSTEMS
JP2970550B2 (en) * 1996-09-13 1999-11-02 日本電気株式会社 Batch demultiplexer
JPH10112682A (en) * 1996-10-03 1998-04-28 Canon Inc Radio communication system and transmission power control method and base station therefor

Also Published As

Publication number Publication date
TW507429B (en) 2002-10-21
GB2374216B (en) 2004-04-14
GB0204011D0 (en) 2002-04-03
WO2001020807A1 (en) 2001-03-22
JP2003509949A (en) 2003-03-11
SE9903235L (en) 2001-03-11
AU7464100A (en) 2001-04-17
GB2374216A (en) 2002-10-09
JP4488332B2 (en) 2010-06-23
SE9903235D0 (en) 1999-09-10

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