INVERSE SPREAD APPARATUS, PROPAGATION LINE ESTIMATE APPARATUS, RECEIVER AND INTERFERENCE SUPPRESSING APPARATUS, INVERSE SPREAD, PROPAGATION LINE ESTIMATE, RECEPTION AND INTERFERENCE SUPPRESSING METHOD, PROGRAM FOR THEM, AND RECORDING MEDIUM WITH THE PROGRAM RECORDED THEREON

摘要

PROBLEM TO BE SOLVED: To provide a receiver that needs not always operate a function corresponding to a mode (64-QAM) most sensitive to deterioration in precision in adaptive modulation communication.

SOLUTION: A controller 104 reads a demodulation method from a control signal specifying demodulation methods (QPSK, 16-QAM, 64-QAM) and controls a sampling rate in an A/D converter 111 and an inverse spreader 102, the number of pilot symbols used by a propagation path estimation block 106 and the number of pilot symbols inversely spread by the inverse spreader 102. Thus, when the demodulation method is other than the 64-QAM, the controller can set the sampling rate or the like matching the QPSK or the 16-QAM so that there is no need of operating the function corresponding to the 64-QAM at all times.

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