WO2004105264A3 - System for equalisation using pilot cancellation - Google Patents

System for equalisation using pilot cancellation Download PDF

Info

Publication number
WO2004105264A3
WO2004105264A3 PCT/CA2004/000757 CA2004000757W WO2004105264A3 WO 2004105264 A3 WO2004105264 A3 WO 2004105264A3 CA 2004000757 W CA2004000757 W CA 2004000757W WO 2004105264 A3 WO2004105264 A3 WO 2004105264A3
Authority
WO
WIPO (PCT)
Prior art keywords
transmitted
receiver
data
parameters
filter
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CA2004/000757
Other languages
French (fr)
Other versions
WO2004105264A2 (en
Inventor
Daniel Massicotte
Adel-Omar Dahmane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Axiocom Inc
Original Assignee
Axiocom Inc
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 Axiocom Inc filed Critical Axiocom Inc
Priority to EP04734198A priority Critical patent/EP1632037A2/en
Priority to US10/558,095 priority patent/US20060233289A1/en
Publication of WO2004105264A2 publication Critical patent/WO2004105264A2/en
Publication of WO2004105264A3 publication Critical patent/WO2004105264A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • 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
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • 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
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

An adaptive procedure that optimizes the parameters of a receiver filter such as a Multiuser Detection (MUD) applied to Direct-Sequence Code Division Multiple Access (DS-CDMA) is disclosed. This procedure takes into account the constraints imposed by the absence of training data sequences sent by the transmitter and required to adapt the filter parameters at the receiver. The adaptation consists in using two distinct data sequences transmitted through the same channel; one data sequence is transmitted as payload data and a second data sequence is transmitted as training data used to adapt the filter parameters at the receiver. Parameters of the receiver filter are adapted in presence of varying channels at the same time as the data information sequences are transmitted. The adaptation is realized following a mixed adaptation procedure based on a direct (without channel identification) and indirect (with channel identification) scheme. The invention is described for UMTS (Universal Mobile Telecommunications System) application in cellular communications system.
PCT/CA2004/000757 2003-05-23 2004-05-21 System for equalisation using pilot cancellation Ceased WO2004105264A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04734198A EP1632037A2 (en) 2003-05-23 2004-05-21 Mixed direct-indirect daptation procedure applied to receiver filter
US10/558,095 US20060233289A1 (en) 2004-05-21 2004-05-21 Mixed direct-indirect adaptation procedure applied to receiver filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47278903P 2003-05-23 2003-05-23
US60/472,789 2003-05-23

Publications (2)

Publication Number Publication Date
WO2004105264A2 WO2004105264A2 (en) 2004-12-02
WO2004105264A3 true WO2004105264A3 (en) 2005-09-22

Family

ID=33476977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2004/000757 Ceased WO2004105264A2 (en) 2003-05-23 2004-05-21 System for equalisation using pilot cancellation

Country Status (3)

Country Link
EP (1) EP1632037A2 (en)
CN (1) CN1806395A (en)
WO (1) WO2004105264A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7508864B2 (en) * 2005-02-14 2009-03-24 Intel Corporation Apparatus and method of canceling interference
US8995592B2 (en) * 2012-05-10 2015-03-31 Futurewei Technologies, Inc. Signaling to support advanced wireless receivers and related devices and methods

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998043362A2 (en) * 1997-03-26 1998-10-01 D.S.P.C. Technologies Ltd. Method and apparatus for reducing spread-spectrum noise

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998043362A2 (en) * 1997-03-26 1998-10-01 D.S.P.C. Technologies Ltd. Method and apparatus for reducing spread-spectrum noise

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BHASHYAM S ET AL: "Multiuser channel estimation for long code CDMA systems", IEEE, vol. 2, 23 September 2000 (2000-09-23), pages 664 - 669, XP010532328 *

Also Published As

Publication number Publication date
EP1632037A2 (en) 2006-03-08
WO2004105264A2 (en) 2004-12-02
CN1806395A (en) 2006-07-19

Similar Documents

Publication Publication Date Title
WO2003026145A3 (en) Apparatus and method for intersymbol interference compensation in spread spectrum communications systems
CA2139234A1 (en) Use of diversity transmission to relax adjacent channel requirements in mobile telephone systems
WO2005101839A3 (en) Shifted channel characteristics for mitigating co-channel interference
AU3602500A (en) Forward error correction on multiplexed cdma channels enabling high performance coding
WO2002060082A3 (en) Simplified block linear equalizer with block space time transmit diversity
EP1931074A3 (en) Adaptive threshold for HS-SCCH part 1 decoding
WO2002087275A3 (en) Method and apparatus for estimating the position of a terminal based on identification codes for transmission sources
ATE442712T1 (en) MULTI-CHANNEL TRANSMISSION AND RECEPTION WITH BLOCK CODING IN A COMMUNICATION SYSTEM
CA2176401A1 (en) A high-data-rate wireless local-area network
NO20032435D0 (en) Simple blockchain time transmitter diversity using multiple spread codes
EP2282438A3 (en) Pilot transmission schemes for wireless multi-carrier communication systems
IL111449A0 (en) Method and apparatus for variable rate signal transmission in a spread spectrum communication system using coset coding
WO2003079577A3 (en) Method and apparatus for reducing inter-channel interference in a wireless communication system
SE0300443D0 (en) Method and system of channel adaptation
WO2001041318A3 (en) Method and apparatus for spreading modulation in spread spectrum communications systems
WO2004100589A3 (en) Data transmission method
KR100523182B1 (en) Modified block space time transmit diversity encoder
EP1404034A3 (en) Method for transmitting an information representative of the number of spreading codes allocated to the mobile stations in communication with a base station
WO2006115459A3 (en) Joint detector in a code division multiple access radio receiver
EP1658687A4 (en) Transmission method of downlink control signal for mimo system
TW572497U (en) User equipment transmit processing using receiver functions
WO2004100393A3 (en) Method for control of the transmission power of a transmitting station in a radio communication system, transmitting station, receiving station and radio communication system
SE0200311D0 (en) Method and system of channel resource allocation
WO2005114888A8 (en) Emission for cdma communications szstems on the mimo channel
EP1737139A3 (en) Multiple channel joint decoding at mobile handset

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2006233289

Country of ref document: US

Ref document number: 10558095

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 20048168933

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2004734198

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2004734198

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 10558095

Country of ref document: US