The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2007
Filed:
Mar. 18, 2003
Noboru Taga, Kanagawa-ken, JP;
Takashi Seki, Kanagawa-ken, JP;
Noboru Taga, Kanagawa-ken, JP;
Takashi Seki, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An apparatus for receiving an OFDM modulated signal includes: an A/D converter converting the received signal to a digital signal; a quadrature demodulator performing quadrature detection of the digital signal and converting the digital signal to a base-band signal; an FFT circuit transforming the base-band signal to a signal of a frequency domain by performing a fast Fourier transformation; an equalizer equalizing the signal of the frequency domain and obtaining demodulated data; an error correcting circuit performing error correction and decoding the demodulated data obtained by the equalizer; an interference detector detecting a receiving quality for each predetermined frequency band from the demodulated data; and a synchronous sequencer assigning weights to the base-band signal and the signal of the frequency domain based on the receiving quality data, and reproducing a timing synchronized signal and a clock pulse required for the demodulation.