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1. WO1996038926 - BASEBAND PROCESSING FOR CELLULAR MODEMS IMPLEMENTED BY DSP

Publication Number WO/1996/038926
Publication Date 05.12.1996
International Application No. PCT/CA1996/000341
International Filing Date 29.05.1996
Chapter 2 Demand Filed 23.12.1996
IPC
H04B 1/64 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
62for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
64Volume compression or expansion arrangements
CPC
H04B 1/64
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details 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
62for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
64Volume compression or expansion arrangements
Applicants
  • SIERRA WIRELESS, INC. [CA]/[CA]
Inventors
  • DUTKIEWICZ, Marek, Karol
Agents
  • GRAY, Brian
  • SIGNORE, Robert
Priority Data
08/454,04130.05.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BASEBAND PROCESSING FOR CELLULAR MODEMS IMPLEMENTED BY DSP
(FR) TRAITEMENT DE BANDE DE BASE POUR MODEMS CELLULAIRES MIS EN OEUVRE PAR TRAITEMENT NUMERIQUE DU SIGNAL
Abstract
(EN)
An integrated cellular switched modem for enhanced cellular data communication by implementing in DSP or Software all baseband processing normally carried out in a cellular radio transceiver within the processor of the single integrated wireless modem. Adjustments are made to EIA/TIA standards for pre-emphasis, de-emphasis, and companding functions implemented by DSP in order to optimize communication for data.
(FR)
Modem à commutation cellulaire intégré destiné à la transmission cellulaire de données améliorée. On met en oeuvre par traitement numérique du signal ou au moyen d'un logiciel tout le traitement de bande de base normalement opéré dans un émetteur-récepteur radio cellulaire dans le processeur du modem radio intégré. Des adaptations aux normes EIA-TIA sont opérées pour les fonctions de pré-accentuation, de désaccentuation et de compression-extension mises en oeuvre par traitement numérique du signal en vue d'optimiser la transmission des données.
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