Title:
COMMUNICATION DEVICE AND METHOD FOR OPERATING COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/065466
Kind Code:
A1
Abstract:
This communication device is provided with: a reception unit that receives a packet signal; a timing-identification unit (251) that identifies the symbol timing using a correlation-computation result obtained by performing a correlation computation on a short-preamble signal in the packet signal; an FFT unit (204A) that performs a fast Fourier transform on a long-preamble signal in accordance with the symbol timing; a division circuit (261) that computes subcarrier channel characteristics by dividing the output signal from the FFT unit (204A) by a known frequency-domain signal corresponding to the long-preamble signal; an IFFT unit (262) that performs an inverse fast Fourier transform on the subcarrier channel characteristics and outputs a time-domain channel impulse response; and a timing-update unit (263) that, on the basis of said channel impulse response, identifies and corrects any misalignment in the symbol timing.
Inventors:
CHEN HANDA (JP)
Application Number:
PCT/JP2012/076266
Publication Date:
May 10, 2013
Filing Date:
October 11, 2012
Export Citation:
Assignee:
MEGACHIPS CORP (JP)
International Classes:
H04J11/00
Other References:
KEN'ICHIRO YAMAZAKI ET AL.: "A Timing Synchronization Scheme Making Use of FFT Gain for OFDM", THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS B, vol. J-86-B, no. 10, 1 October 2003 (2003-10-01), pages 2097 - 2106
TAEKYU KIM ET AL.: "A New Symbol Timing and Frequency Synchronization Design for OFDM- based WLAN Systems", ADVANCED COMMUNICATION TECHNOLOGY, THE 9TH INTERNATIONAL CONFERENCE ON, vol. 3, 14 February 2007 (2007-02-14), pages 1669 - 1672, XP031085076
AMIT SHAW ET AL.: "A Novel Preamble Structure for Robust Timing Synchronization in OFDM system", TENCON 2007, IEEE REGION 10 CONFERENCE, 2 November 2007 (2007-11-02)
TAEKYU KIM ET AL.: "A New Symbol Timing and Frequency Synchronization Design for OFDM- based WLAN Systems", ADVANCED COMMUNICATION TECHNOLOGY, THE 9TH INTERNATIONAL CONFERENCE ON, vol. 3, 14 February 2007 (2007-02-14), pages 1669 - 1672, XP031085076
AMIT SHAW ET AL.: "A Novel Preamble Structure for Robust Timing Synchronization in OFDM system", TENCON 2007, IEEE REGION 10 CONFERENCE, 2 November 2007 (2007-11-02)
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
Hidetoshi Yoshitake (JP)
Hidetoshi Yoshitake (JP)
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