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1. WO2000022746 - A CDMA RECEIVER THAT SHARES A TRACKING DEVICE AMONG MULTIPLE RAKE BRANCHES

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Publication Number WO/2000/022746
Publication Date 20.04.2000
International Application No. PCT/SE1999/001844
International Filing Date 12.10.1999
Chapter 2 Demand Filed 19.04.2000
IPC
H04B 1/7085 2011.1
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
7073Synchronisation aspects
7085using a code tracking loop, e.g. a delay-locked loop
H04B 1/7115 2011.1
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
7097Interference-related aspects
711the interference being multi-path interference
7115Constructive combining of multi-path signals, i.e. RAKE receivers
H04B 1/7113 2011.1
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
7097Interference-related aspects
711the interference being multi-path interference
7113Determination of path profile
H04B 1/7117 2011.1
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
7097Interference-related aspects
711the interference being multi-path interference
7115Constructive combining of multi-path signals, i.e. RAKE receivers
7117Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
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
H04B 1/7113
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
7097Interference-related aspects
711the interference being multi-path interference
7113Determination of path profile
H04B 1/7115
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
7097Interference-related aspects
711the interference being multi-path interference
7115Constructive combining of multi-path signals, i.e. RAKE receivers
H04B 1/7117
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
7097Interference-related aspects
711the interference being multi-path interference
7115Constructive combining of multi-path signals, i.e. RAKE receivers
7117Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (publ) [SE]/[SE]
Inventors
  • KLANG, Göran
  • KONRADSSON, Per
Agents
  • ERICSSON RADIO SYSTEMS AB
  • MILDH, Christer
Priority Data
09/169,94313.10.1998US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A CDMA RECEIVER THAT SHARES A TRACKING DEVICE AMONG MULTIPLE RAKE BRANCHES
(FR) RECEPTEUR CDMA QUI PARTAGE UN DISPOSITIF DE POURSUITE AVEC PLUSIEURS DERIVATIONS RAKE
front page image
Abstract
(EN) A CDMA receiver includes a plurality of RAKE branches for despreading the received CDMA signals over a corresponding plurality of paths and a single tracking device that is shared among the plurality of the RAKE branches for tracking the delays of the received CDMA signal over a corresponding path. Similarly, a method for tracking a CDMA signal correlates the received signal with local PN code using a plurality of RAKE branches and tracks the received signal using a single tracking device that is shared among the plurality of the RAKE branches.
(FR) L'invention porte sur un récepteur CDMA comprenant une pluralité de dérivations RAKE permettant de désétaler les signaux CDMA reçus sur une pluralité de voies correspondantes, et un dispositif de poursuite unique qui est partagé entre la pluralité de dérivations RAKE de façon à suivre les retards des signaux CDMA reçus sur une voie correspondante. De manière similaire, l'invention porte sur un procédé de poursuite d'un signal CDMA qui met en corrélation le signal reçu avec des codes pseudo-aléatoires locaux utilisant une pluralité de dérivations RAKE, et qui suit le signal reçu à l'aide du dispositif de poursuite unique qui est partagé entre la pluralité de dérivations RAKE.
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