WO2002052743A3 - Apparatus and methods for finger delay selection in rake receivers - Google Patents

Apparatus and methods for finger delay selection in rake receivers Download PDF

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Publication number
WO2002052743A3
WO2002052743A3 PCT/US2001/049268 US0149268W WO02052743A3 WO 2002052743 A3 WO2002052743 A3 WO 2002052743A3 US 0149268 W US0149268 W US 0149268W WO 02052743 A3 WO02052743 A3 WO 02052743A3
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WO
WIPO (PCT)
Prior art keywords
methods
spread spectrum
time
spectrum signal
delay selection
Prior art date
Application number
PCT/US2001/049268
Other languages
French (fr)
Other versions
WO2002052743A9 (en
WO2002052743A2 (en
Inventor
Yi-Pin Eric Wang
Gregory Edward Bottomley
Kenzo Urabe
Original Assignee
Ericsson Inc
Yi-Pin Eric Wang
Gregory Edward Bottomley
Kenzo Urabe
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 Inc, Yi-Pin Eric Wang, Gregory Edward Bottomley, Kenzo Urabe filed Critical Ericsson Inc
Priority to EP01988345A priority Critical patent/EP1344327B1/en
Publication of WO2002052743A2 publication Critical patent/WO2002052743A2/en
Publication of WO2002052743A3 publication Critical patent/WO2002052743A3/en
Publication of WO2002052743A9 publication Critical patent/WO2002052743A9/en

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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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709727—GRAKE type RAKE receivers

Abstract

Methods of recovering information encoded in a spread spectrum signal transmitted according to a spreading sequence in a communications medium are provided in which a spread spectrum signal is received from the communications medium and correlated with a spreading sequence to produce a plurality of time-offset correlations. Some of these time-offset correlations may be designed to cancel out known interfering signals. A subset of the plurality of time-offsets may then be selected, and corresponding traffic correlations may then be combined using a weighted combination to estimate information encoded in the transmitted spread spectrum signal. Receivers for implementing these methods are also provided.
PCT/US2001/049268 2000-12-22 2001-12-18 Apparatus and methods for finger delay selection in rake receivers WO2002052743A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01988345A EP1344327B1 (en) 2000-12-22 2001-12-18 Apparatus and methods for finger delay selection in rake receivers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US25743900P 2000-12-22 2000-12-22
US60/257,439 2000-12-22
US09/845,950 US6922434B2 (en) 1999-10-19 2001-04-30 Apparatus and methods for finger delay selection in RAKE receivers
US09/845,950 2001-04-30

Publications (3)

Publication Number Publication Date
WO2002052743A2 WO2002052743A2 (en) 2002-07-04
WO2002052743A3 true WO2002052743A3 (en) 2003-01-16
WO2002052743A9 WO2002052743A9 (en) 2004-08-05

Family

ID=26945960

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/049268 WO2002052743A2 (en) 2000-12-22 2001-12-18 Apparatus and methods for finger delay selection in rake receivers

Country Status (3)

Country Link
US (1) US6922434B2 (en)
EP (1) EP1344327B1 (en)
WO (1) WO2002052743A2 (en)

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Also Published As

Publication number Publication date
US20010028677A1 (en) 2001-10-11
WO2002052743A9 (en) 2004-08-05
US6922434B2 (en) 2005-07-26
EP1344327A2 (en) 2003-09-17
WO2002052743A2 (en) 2002-07-04
EP1344327B1 (en) 2012-11-21

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