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:
Jun. 07, 2011
Filed:
May. 11, 2007
Yukitoshi Sanada, Kanagawa, JP;
Hideki Yokoshima, Kanagawa, JP;
Masayoshi Abe, Tokyo, JP;
Yuya Kondo, Kanagawa, JP;
Mamiko Inamori, Kanagawa, JP;
Kazuyuki Saijo, Tokyo, JP;
Yukitoshi Sanada, Kanagawa, JP;
Hideki Yokoshima, Kanagawa, JP;
Masayoshi Abe, Tokyo, JP;
Yuya Kondo, Kanagawa, JP;
Mamiko Inamori, Kanagawa, JP;
Kazuyuki Saijo, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A wireless communication apparatus for receiving a packet formed of a signal modulated by OFDM includes the following elements. A band-pass filter extracts an OFDM signal of a desired band. A low-noise amplifier having a gain controlled according to a received-signal intensity amplifies the desired OFDM signal. A frequency converter down-converts the amplified OFDM signal into a baseband signal. An analog-digital converter converts the baseband signal into a digital signal. A first high-pass filter removes a DC offset from the baseband signal corresponding to a predetermined preamble portion of the packet. A frequency-offset estimator estimates a frequency offset from the sample signals constituting the baseband signal from which the DC offset has been removed by the first high-pass filter. A frequency-offset corrector removes the estimated frequency offset from the baseband signal. A demodulator demodulates subcarrier signals arranged in a frequency domain from the baseband signal compensated for the frequency offset.