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1. WO2000039940 - CODE TRACKING LOOP FOR A SPREAD-SPECTRUM RECEIVER

Publication Number WO/2000/039940
Publication Date 06.07.2000
International Application No. PCT/GB1999/004396
International Filing Date 23.12.1999
Chapter 2 Demand Filed 18.07.2000
IPC
H04B 1/707 2011.01
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
69Spread spectrum techniques
707using direct sequence modulation
CPC
H04B 1/7085
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
69Spread spectrum techniques
707using direct sequence modulation
7073Synchronisation aspects
7085using a code tracking loop, e.g. a delay-locked loop
H04J 13/0022
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
13Code division multiplex systems
0007Code type
0022PN, e.g. Kronecker
Applicants
  • CADENCE DESIGN SYSTEMS INC. [US/US]; San Jose Corporate Headquarters San Jose River Oaks Campus 555 River Oaks Parkway San Jose, CA 95134, US (AllExceptUS)
  • LUXFORD, Gregory, Vincent [GB/GB]; GB (UsOnly)
Inventors
  • LUXFORD, Gregory, Vincent; GB
Agents
  • BUTCHER, Ian, James ; A.A. Thornton & Co. 235 Hign Holborn London WC1V 7LE, GB
Priority Data
9828602.423.12.1998GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CODE TRACKING LOOP FOR A SPREAD-SPECTRUM RECEIVER
(FR) BOUCLE DE POURSUITE GENERATRICE DE CODES POUR RECEPTEUR A SPECTRE ETALE
Abstract
(EN)
Circuitry for direct-sequence spread-spectrum receiver function to synchronise a locally generated code sequence with a received signal by generating the local code at a fixed rate while applying a variable delay to the received signal to achieve synchronisation. This arrangement simplifies the means generating the local code as it can simply run at a fixed rate.
(FR)
L'invention se rapporte à un ensemble de circuits destiné à un récepteur à spectre dispersé avec séquences continues, qui est conçu pour synchroniser une séquence de codes générés localement avec un signal reçu. Pour ce faire, ledit ensemble de circuits génère le code local à un débit fixe tout en appliquant un retard variable au signal reçu de manière à établir la synchronisation. Cet agencement simplifie l'unité générant le code local du fait que ladite unité peut fonctionner simplement à un débit fixe.
Also published as
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