TR200903651A1 - OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter. - Google Patents

OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter.

Info

Publication number
TR200903651A1
TR200903651A1 TR2009/03651A TR200903651A TR200903651A1 TR 200903651 A1 TR200903651 A1 TR 200903651A1 TR 2009/03651 A TR2009/03651 A TR 2009/03651A TR 200903651 A TR200903651 A TR 200903651A TR 200903651 A1 TR200903651 A1 TR 200903651A1
Authority
TR
Turkey
Prior art keywords
transmitter
ofdm
accordance
communication
receiver operating
Prior art date
Application number
TR2009/03651A
Other languages
Turkish (tr)
Inventor
�Ah�N Co�Kun
Zeynep Kurt G�Ne�
Original Assignee
T�Rkcell �Let���M H�Zmetler� A.�.
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 T�Rkcell �Let���M H�Zmetler� A.�. filed Critical T�Rkcell �Let���M H�Zmetler� A.�.
Priority to TR2009/03651A priority Critical patent/TR200903651A1/en
Priority to SE1151055A priority patent/SE1151055A1/en
Priority to PCT/IB2010/050303 priority patent/WO2010131125A1/en
Publication of TR200903651A1 publication Critical patent/TR200903651A1/en
Priority to FI20116245A priority patent/FI20116245A/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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • 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
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/0342—QAM
    • 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
    • H04L25/022—Channel estimation of frequency response
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Small-Scale Networks (AREA)

Abstract

The present invention relates to a method, wherein channel estimation errors observed in unequal amplitude constellations in the additive noise and frequency equalization process in OFDM (Orthogonal frequency-division multiplexing) based multi-carrier systems are measured by means of a receiver and a transmitter, new constellations are generated according to the said measurements, and the errors are compensated.
TR2009/03651A 2008-12-30 2009-05-11 OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter. TR200903651A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
TR2009/03651A TR200903651A1 (en) 2008-12-30 2009-05-11 OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter.
SE1151055A SE1151055A1 (en) 2009-05-11 2010-01-25 Constellation formation for OFDM
PCT/IB2010/050303 WO2010131125A1 (en) 2009-05-11 2010-01-25 Constellation shaping for ofdm
FI20116245A FI20116245A (en) 2009-05-11 2011-12-08 Constellation Editing for OFDM

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2008/10013A TR200810013A1 (en) 2008-12-30 2008-12-30 OFDM is a method used in communication.
TR2009/03651A TR200903651A1 (en) 2008-12-30 2009-05-11 OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter.

Publications (1)

Publication Number Publication Date
TR200903651A1 true TR200903651A1 (en) 2010-07-21

Family

ID=42121400

Family Applications (2)

Application Number Title Priority Date Filing Date
TR2008/10013A TR200810013A1 (en) 2008-12-30 2008-12-30 OFDM is a method used in communication.
TR2009/03651A TR200903651A1 (en) 2008-12-30 2009-05-11 OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
TR2008/10013A TR200810013A1 (en) 2008-12-30 2008-12-30 OFDM is a method used in communication.

Country Status (4)

Country Link
FI (1) FI20115772L (en)
SE (1) SE1150722A1 (en)
TR (2) TR200810013A1 (en)
WO (1) WO2010076699A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6327314B1 (en) 1998-04-01 2001-12-04 At&T Corp. Method and apparatus for channel estimation for multicarrier systems
US7260055B2 (en) 2003-05-30 2007-08-21 Agency For Science, Technology, And Research Method for reducing channel estimation error in an OFDM system

Also Published As

Publication number Publication date
FI20115772L (en) 2011-07-29
SE1150722A1 (en) 2011-09-30
WO2010076699A1 (en) 2010-07-08
TR200810013A1 (en) 2010-07-21

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TR200903651A1 (en) OFDM is a transmitter used in communication and a receiver operating in accordance with this transmitter.