WO2002043269A3 - Method and apparatus for improving channel estimates using space-time coding - Google Patents

Method and apparatus for improving channel estimates using space-time coding Download PDF

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Publication number
WO2002043269A3
WO2002043269A3 PCT/EP2001/013723 EP0113723W WO0243269A3 WO 2002043269 A3 WO2002043269 A3 WO 2002043269A3 EP 0113723 W EP0113723 W EP 0113723W WO 0243269 A3 WO0243269 A3 WO 0243269A3
Authority
WO
WIPO (PCT)
Prior art keywords
branch
space
offset
channel estimates
data
Prior art date
Application number
PCT/EP2001/013723
Other languages
French (fr)
Other versions
WO2002043269A2 (en
Inventor
Bengt Lindoff
Original Assignee
Ericsson Telefon Ab L M
Bengt Lindoff
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 Telefon Ab L M, Bengt Lindoff filed Critical Ericsson Telefon Ab L M
Priority to AU2002224891A priority Critical patent/AU2002224891A1/en
Publication of WO2002043269A2 publication Critical patent/WO2002043269A2/en
Publication of WO2002043269A3 publication Critical patent/WO2002043269A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals

Abstract

A method and apparatus for space-time coding transmitted signals is disclosed. The system has a first and second branch in the transmitter. Data is divided between the first and second branch. The data in the second branch is transformed to obtain time diversity. The data is multiplexed with training sequences in both the first and second branch. The signals in the first and second branch are mapped into complex valued symbols. The complex valued symbols in the first and second branch are offset by a first and a second modulation offset, wherein the second modulation offset is different from the first modulation offset. The signals in each branch are then filtered, modulated and transmitted. The use of different modulation offsets in the first and second branches permits even the same training sequence to be used in both branches, while still obtaining acceptable channel estimates for both channels.
PCT/EP2001/013723 2000-11-27 2001-11-26 Method and apparatus for improving channel estimates using space-time coding WO2002043269A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002224891A AU2002224891A1 (en) 2000-11-27 2001-11-26 Method and apparatus for improving channel estimates using space-time coding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72177600A 2000-11-27 2000-11-27
US09/721,776 2000-11-27

Publications (2)

Publication Number Publication Date
WO2002043269A2 WO2002043269A2 (en) 2002-05-30
WO2002043269A3 true WO2002043269A3 (en) 2003-02-27

Family

ID=24899262

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/013723 WO2002043269A2 (en) 2000-11-27 2001-11-26 Method and apparatus for improving channel estimates using space-time coding

Country Status (2)

Country Link
AU (1) AU2002224891A1 (en)
WO (1) WO2002043269A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101294283B1 (en) 2011-12-19 2013-08-07 전자부품연구원 Method for estimating channel based on cross correlation of ofdm system and device thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000049730A1 (en) * 1999-02-16 2000-08-24 Mitsubishi Denki Kabushiki Kaisha Radio communication system, transmitter and receiver
US6115427A (en) * 1996-04-26 2000-09-05 At&T Corp. Method and apparatus for data transmission using multiple transmit antennas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6115427A (en) * 1996-04-26 2000-09-05 At&T Corp. Method and apparatus for data transmission using multiple transmit antennas
WO2000049730A1 (en) * 1999-02-16 2000-08-24 Mitsubishi Denki Kabushiki Kaisha Radio communication system, transmitter and receiver
EP1073214A1 (en) * 1999-02-16 2001-01-31 Mitsubishi Denki Kabushiki Kaisha Radio communication system, transmitter and receiver

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
LINDSKOG E ET AL: "TIME-REVERSAL SPACE-TIME BLOCK CODING AND TRANSMIT DELAY DIVERSITY SEPARATE AND COMBINED", CONFERENCE RECORD OF THE 34TH. ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS, & COMPUTERS. PACIFIC GROVE, CA, OCT. 29 - NOV. 1, 2000, ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS, NEW YORK, NY: IEEE, US, vol. 1 OF 2. CONF. 34, 29 October 2000 (2000-10-29), pages 572 - 577, XP001048562, ISBN: 0-7803-6515-1 *
NAGUIB A F ET AL: "Space-time coded modulation for high data rate wireless communications", GLOBAL TELECOMMUNICATIONS CONFERENCE, 1997. GLOBECOM '97., IEEE PHOENIX, AZ, USA 3-8 NOV. 1997, NEW YORK, NY, USA,IEEE, US, 3 November 1997 (1997-11-03), pages 102 - 109, XP010254629, ISBN: 0-7803-4198-8 *
STIRLING-GALLACHER R A ET AL: "Improving performance of coherent coded OFDM systems using space time transmit diversity", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 37, no. 7, 29 March 2001 (2001-03-29), pages 457 - 458, XP006016414, ISSN: 0013-5194 *

Also Published As

Publication number Publication date
WO2002043269A2 (en) 2002-05-30
AU2002224891A1 (en) 2002-06-03

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