| 摘要 |
PROBLEM TO BE SOLVED: To provide a receiving apparatus capable of improving the C/N ratio of a received OFDM signal and the error correction capability. SOLUTION: An equalization control circuit 12 calculates transfer functions of equalization circuits 27-1, 27-2 on the basis of a characteristic of a transmission path supplied from transmission path characteristic estimate circuits 26-1, 26-2 and respectively supplies the transfer functions to the equalization circuits 27-1, 27-2, calculates a metric control value to apply weighting to a path metric on the basis of the characteristic of the transmission path and supplies the metric control value to a Viterbi decoding circuit 41. An adder circuit 13 additively composes outputs from the equalization circuits 27-1, 27-2 so that the outputs of the equalization circuits 27-1, 27-2 are composed at a maximum ratio, and the composed signal is fed to the Viterbi decoding circuit 41. The Viterbi decoding circuit 41 calculates the path metric and multiplies the metric control value with the path metric to apply weighting to the path metric by each OFDM carrier. The receiving apparatus and method are applicable to electronic apparatuses for receiving OFDM signals. COPYRIGHT: (C)2005,JPO&NCIPI
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