TW200718047A - Selecting delay values for a rake receiver - Google Patents

Selecting delay values for a rake receiver

Info

Publication number
TW200718047A
TW200718047A TW095132434A TW95132434A TW200718047A TW 200718047 A TW200718047 A TW 200718047A TW 095132434 A TW095132434 A TW 095132434A TW 95132434 A TW95132434 A TW 95132434A TW 200718047 A TW200718047 A TW 200718047A
Authority
TW
Taiwan
Prior art keywords
delay values
delay
rake
values
magnitudes
Prior art date
Application number
TW095132434A
Other languages
Chinese (zh)
Inventor
Elias Jonsson
Marten Myrehed
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
Priority claimed from EP05388069A external-priority patent/EP1760901B1/en
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of TW200718047A publication Critical patent/TW200718047A/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
    • H04B1/69—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
    • H04B1/7113—Determination of path profile
    • 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
    • H04B2201/70702—Intercell-related aspects
    • 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
    • H04B2201/70707—Efficiency-related aspects
    • 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

Multipath components of transmitted data symbols are received with individ-ual delays and processed by a RAKE having a number of fingers. A delay profile (31) indicating magnitudes for a first number of delay values is pro-vided. Estimated magnitudes for a second number of delay values located between the first number of delay values are calculated by interpolation, and a combined delay profile (32) is provided by combining the magnitudes for the first and second number of delay values. Delay values for peaks in the combined delay profile are determined, and a number of peak delay values (P1, P2, P) comprising the largest peak are selected from the combined delay profile. At least some of the selected peak delay values are provided to the RAKE and assigned to the fingers. This allows a reduction of current con-sumption and dye area, while still providing delay values with sufficient reso-lution for the RAKE.
TW095132434A 2005-09-01 2006-09-01 Selecting delay values for a rake receiver TW200718047A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05388069A EP1760901B1 (en) 2005-09-01 2005-09-01 Method and apparatus for selecting delay values for a RAKE receiver
US71903705P 2005-09-21 2005-09-21

Publications (1)

Publication Number Publication Date
TW200718047A true TW200718047A (en) 2007-05-01

Family

ID=37758530

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095132434A TW200718047A (en) 2005-09-01 2006-09-01 Selecting delay values for a rake receiver

Country Status (3)

Country Link
KR (1) KR20080039537A (en)
TW (1) TW200718047A (en)
WO (1) WO2007025749A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9225386B2 (en) 2007-11-20 2015-12-29 Sony Corporation Method for placement of fingers with G-Rake advanced receiver
WO2009104057A1 (en) * 2008-02-22 2009-08-27 Freescale Semiconductor, Inc. Processor for use as a path searcher of a spread spectrum receiver and a method of operation of the processor
CN113660011B (en) * 2021-08-17 2023-08-22 中铁二院工程集团有限责任公司 Diversity receiving method and system for vacuum pipeline maglev train-ground wireless communication

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6731622B1 (en) * 1998-05-01 2004-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Multipath propagation delay determining means using periodically inserted pilot symbols
US20040042411A1 (en) * 2002-08-30 2004-03-04 Erik Dahlback Method and apparatus for controlling the rate of path searching in a communications system
KR100769493B1 (en) * 2003-03-13 2007-10-24 인터디지탈 테크날러지 코포레이션 Wireless communication method and system for assigning multi-paths to rake receiver fingers

Also Published As

Publication number Publication date
KR20080039537A (en) 2008-05-07
WO2007025749A3 (en) 2007-05-03
WO2007025749A2 (en) 2007-03-08

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