| 摘要 |
PROBLEM TO BE SOLVED: To provide an OFDM demodulator and a power weighting method with which a propagation path can be compensated without using a divider in the OFDM demodulator, the number of arithmetic circuits is decreased and arithmetic accuracy and an arithmetic speed can be improved. SOLUTION: An OFDM demodulator device 200 is provided with a separation circuit 211 for separating a preamble signal a212 for propagation path estimation and an OFDM data signal a211 from a signal a203 in which secondary modulation is demodulated and a multiplication circuit 214 for applying complex multiplication to a phase conjugate signal a214 of each subcarrier in a copied preamble for propagation path estimation and a corresponding subcarrier of a payload OFDM symbol a211 and outputs the result as a signal a215 weighted with received power. With respect to a received packed demodulated from the secondary modulation by an FET operation, the phase conjugate of each subcarrier in the preamble for propagation path estimation is calculated, and the phase conjugate signal of each subcarrier in the corresponding preamble for the propagation path estimation is multiplied to each subcarrier in the payload OFDM symbol. COPYRIGHT: (C)2003,JPO
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