| US 7,519,122 B2 | ||
| OFDM reception apparatus and OFDM reception method | ||
| Takaya Hayashi, Kyoto (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/570,769 PCT Filed May 09, 2005, PCT No. PCT/JP2005/008431 § 371(c)(1), (2), (4) Date Mar. 07, 2006, PCT Pub. No. WO2005/109712, PCT Pub. Date Nov. 17, 2005. |
||
| Claims priority of application No. 2004-138195 (JP), filed on May 07, 2004. | ||
| Prior Publication US 2007/0036232 A1, Feb. 15, 2007 | ||
| Int. Cl. H04K 1/10 (2006.01); H04B 1/10 (2006.01) | ||
| U.S. Cl. 375—260 [375/350] | 17 Claims |
| 1. An OFDM reception apparatus for receiving and demodulating an OFDM (Orthogonal Frequency Division Multiplexing) signal
which transmits a pilot signal whose amplitude and phase are known, the apparatus comprising:
a channel estimation section for calculating a channel response before interpolation by performing computation between a frequency-domain
OFDM signal obtained by Fourier-transforming the received OFDM signal and the pilot signal, performing interpolation with
respect to the before-interpolation channel response using a plurality of filters having different characteristics from each
other, and outputting a plurality of interpolated channel responses based on respective results of the interpolation obtained
by the plurality of filters;
an equalization section for performing waveform equalization with respect to the frequency-domain OFDM signal based on the
plurality of interpolated channel responses, and outputting a plurality of demodulated signals based on respective results
of the waveform equalization corresponding to the plurality of interpolated channel responses;
a determination section for determining one having best quality from the plurality of demodulated signals, and outputting
a result of the determination; and
a selection section for selecting and outputting one of the plurality of demodulated signals in accordance with the determination
result.
|