Title:
放送信号の時刻測定装置、この時刻測定装置を用いた送信装置及び中継装置、及び遅延時間測定装置
Document Type and Number:
Japanese Patent JP4374023
Kind Code:
B2
Abstract:
A time measuring apparatus includes window generation means for delaying the reception signal of one symbol to correlate the guard intervals before and after delaying with each other, generating an OFDM symbol timing signal based on its correlation result and generating a fast Fourier transformation (FFT) window signal necessary to FFT-process the reception signal based on the generated OFDM symbol timing signal, FFT means for FFT-processing the reception signal based on the FFT window signal, time information acquiring means for acquiring reference time information at FFT window signal generation, carrier symbol extraction means for extracting the reference carrier symbol signal from an output of the FFT means, measuring means for measuring a time difference between an OFDM symbol signal with the reference carrier symbol signal extracted at the carrier symbol extraction means belonged thereto and the FFT window signal, and computing means for computing the reception time based on the reference time information acquired at the time information acquiring means and the time difference measured by the measuring means.
Inventors:
Yasuo Takahashi
Toshihiro Ishida
Toshihiro Ishida
Application Number:
JP2006539272A
Publication Date:
December 02, 2009
Filing Date:
September 30, 2005
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H04J11/00; H04B7/15
Domestic Patent References:
| JP2004320348A | ||||
| JP4212403B2 | ||||
| JP2004104237A | ||||
| JP2004104236A | ||||
| JP2004104235A | ||||
| JP2000059325A | ||||
| JP11346196A | ||||
| JP2001189657A |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura