DE60326319D1 - Multi-carrier transmission with channel estimation - Google Patents

Multi-carrier transmission with channel estimation

Info

Publication number
DE60326319D1
DE60326319D1 DE60326319T DE60326319T DE60326319D1 DE 60326319 D1 DE60326319 D1 DE 60326319D1 DE 60326319 T DE60326319 T DE 60326319T DE 60326319 T DE60326319 T DE 60326319T DE 60326319 D1 DE60326319 D1 DE 60326319D1
Authority
DE
Germany
Prior art keywords
channel
amplitude
phase
multipath fading
fading channel
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.)
Expired - Lifetime
Application number
DE60326319T
Other languages
German (de)
Inventor
Jeong-Woo Jwa
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.)
KTFreetel Co Ltd
Original Assignee
KTFreetel Co Ltd
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 KTFreetel Co Ltd filed Critical KTFreetel Co Ltd
Application granted granted Critical
Publication of DE60326319D1 publication Critical patent/DE60326319D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04L27/2697—Multicarrier modulation systems in combination with other modulation techniques
    • H04L27/2698—Multicarrier modulation systems in combination with other modulation techniques double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
    • 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
    • H04L27/2627—Modulators
    • H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • H04L27/263—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators modification of IFFT/IDFT modulator for performance improvement
    • 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
    • H04L27/2649—Demodulators
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • H04L27/2651—Modification of fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators for performance improvement
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
    • 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
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03617—Time recursive algorithms
    • H04L2025/03624—Zero-forcing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Transmitters (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: A channel compensation method and wireless communication system in the orthogonal frequency division multiplexing system on the frequency-selective fading channel are provided to improve the overall error performance by reducing the possibility of error generation in a period where the amplitude of a channel is small. CONSTITUTION: A channel compensation method and wireless communication system in the orthogonal frequency division multiplexing system on the frequency-selective fading channel includes a transmitting terminal(I) and a receiving terminal(II). The transmitting terminal(I) modulates a vector for transmitting the information into an OFDM based signal by performing at least two time of Fourier transformations and transmits it through a multipath fading, and also it modulates a pilot symbol vector for predicting the amplitude and phase of the multipath fading channel into the OFDM based signal and transmits it through the multipath fading channel. The receiving terminal(II) predicts the amplitude and phase of the multipath fading channel by demodulating the pilot symbol vector received through the multipath fading channel, and it outputs the noise signal value by calculating the average value in the OFDM symbol period after the amplitude and phase of the channel are compensated by using the amplitude and phase of the predicted channel.
DE60326319T 2003-03-27 2003-12-08 Multi-carrier transmission with channel estimation Expired - Lifetime DE60326319D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20030019201 2003-03-27
KR1020030028227A KR100542114B1 (en) 2003-03-27 2003-05-02 Wireless wireless communication system based on the orthogonal frequency division multiplexing and method for channel compensation

Publications (1)

Publication Number Publication Date
DE60326319D1 true DE60326319D1 (en) 2009-04-09

Family

ID=37368937

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60326319T Expired - Lifetime DE60326319D1 (en) 2003-03-27 2003-12-08 Multi-carrier transmission with channel estimation

Country Status (3)

Country Link
KR (1) KR100542114B1 (en)
AT (1) ATE424079T1 (en)
DE (1) DE60326319D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0518434A2 (en) * 2004-11-16 2008-11-18 Samsung Electronics Co Ltd apparatus and method for processing digital signal in an ofdma wireless communication system
KR101003087B1 (en) * 2005-06-17 2010-12-21 삼성전자주식회사 Apparatus and method for transmitting and receiving of broadcasting data in a wireless communication system
EP1734714B1 (en) 2005-06-17 2012-07-18 Samsung Electronics Co., Ltd. Apparatus and method for transmitting/receiving broadcast data in a mobile communication system
CN101001136A (en) * 2006-01-13 2007-07-18 北京三星通信技术研究有限公司 Equipment and method of subcarrier mapping of circulation shifting
WO2007086364A1 (en) 2006-01-24 2007-08-02 Nec Corporation Transmission path estimation device, equalization device, and radio system
KR100781991B1 (en) * 2006-04-25 2007-12-06 한국전자통신연구원 Mobile communication system using multi-carrier and channel estimation method thereof

Also Published As

Publication number Publication date
KR100542114B1 (en) 2006-01-10
KR20040086038A (en) 2004-10-08
ATE424079T1 (en) 2009-03-15

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