| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an OFDM receiver which appropriately equalizes a received OFDM signal and highly accurately restores transmission data. <P>SOLUTION: An OFDM receiver calculates SP transmission line transfer characteristics of a received SP signal and determines estimated transmission line transfer characteristics of all subcarriers by interpolating the SP transmission line transfer characteristics in a time direction and a frequency direction. The OFDM receiver calculates an equalized subcarrier complex amplitude by dividing a reception subcarrier complex amplitude by the estimated transmission line transfer characteristic. The interpolation in the frequency direction is performed by controlling a central time point of a passband (period) of a complex bandpass filter based on a delay profile. The delay profile is determined by calculating a signal point which is closest to the equalized subcarrier complex amplitude as a determination subcarrier complex amplitude in signal points which are mapped based on a modulation parameter of each subcarrier, by dividing the reception subcarrier complex amplitude by the determination subcarrier complex amplitude, and by performing an IFFT and a square operation processing. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
