NO20071261L - Fremgangsmate og system for linktilpasning i et ortogonalfrekvensdeltmultiplekset (OFDM) tradlost kommunikasjonssystem - Google Patents

Fremgangsmate og system for linktilpasning i et ortogonalfrekvensdeltmultiplekset (OFDM) tradlost kommunikasjonssystem

Info

Publication number
NO20071261L
NO20071261L NO20071261A NO20071261A NO20071261L NO 20071261 L NO20071261 L NO 20071261L NO 20071261 A NO20071261 A NO 20071261A NO 20071261 A NO20071261 A NO 20071261A NO 20071261 L NO20071261 L NO 20071261L
Authority
NO
Norway
Prior art keywords
ofdm
orthogonal frequency
wireless communication
communication system
fitting method
Prior art date
Application number
NO20071261A
Other languages
English (en)
Inventor
Robert Lind Olesen
Guodong Zhang
Chang-Soo Koo
Yuejin Huang
Yingming Tsai
Original Assignee
Interdigital Tech Corp
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 Interdigital Tech Corp filed Critical Interdigital Tech Corp
Publication of NO20071261L publication Critical patent/NO20071261L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

En fremgangsmåte og et system for linktilpasning i et trådløst ortogonalfrekvensdeltmultiplekset (OFDM) kommunikasjonssystem blir beskrevet. Samtlige delkanaler blir delt i flere grupper. En kanalkvalitetsindikator (CQI) genereres for hver gruppe basert på kanalkvalitetsstatus i hver gruppe, og kommunikasjonsparameter justeres i samsvar med denne CQI.
NO20071261A 2004-08-11 2007-03-08 Fremgangsmate og system for linktilpasning i et ortogonalfrekvensdeltmultiplekset (OFDM) tradlost kommunikasjonssystem NO20071261L (no)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US60074104P 2004-08-11 2004-08-11
US11/123,738 US20060034244A1 (en) 2004-08-11 2005-05-06 Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system
PCT/US2005/026670 WO2006020400A2 (en) 2004-08-11 2005-07-27 Method and system for link adaptation in an orthogonal frequency division multiplexing (ofdm) wireless communication system

Publications (1)

Publication Number Publication Date
NO20071261L true NO20071261L (no) 2007-03-08

Family

ID=35799854

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20071261A NO20071261L (no) 2004-08-11 2007-03-08 Fremgangsmate og system for linktilpasning i et ortogonalfrekvensdeltmultiplekset (OFDM) tradlost kommunikasjonssystem

Country Status (12)

Country Link
US (1) US20060034244A1 (no)
EP (2) EP1779571A4 (no)
JP (1) JP2008510374A (no)
KR (2) KR20070059086A (no)
AU (2) AU2005274162B2 (no)
BR (1) BRPI0515018A (no)
CA (1) CA2576481A1 (no)
IL (1) IL181026A0 (no)
MX (1) MX2007001709A (no)
NO (1) NO20071261L (no)
TW (3) TWI305094B (no)
WO (1) WO2006020400A2 (no)

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Also Published As

Publication number Publication date
AU2008243233A1 (en) 2008-12-04
TW201004195A (en) 2010-01-16
KR20070059086A (ko) 2007-06-11
WO2006020400A3 (en) 2006-12-07
BRPI0515018A (pt) 2008-07-01
KR20070067705A (ko) 2007-06-28
AU2005274162A1 (en) 2006-02-23
US20060034244A1 (en) 2006-02-16
EP2187554A1 (en) 2010-05-19
CA2576481A1 (en) 2006-02-23
EP1779571A4 (en) 2007-12-19
MX2007001709A (es) 2007-04-16
AU2005274162B2 (en) 2008-08-14
TW200623697A (en) 2006-07-01
TW200705872A (en) 2007-02-01
IL181026A0 (en) 2007-07-04
TWI305094B (en) 2009-01-01
EP1779571A2 (en) 2007-05-02
JP2008510374A (ja) 2008-04-03
WO2006020400A2 (en) 2006-02-23

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