| 摘要 |
PROBLEM TO BE SOLVED: To flexibly cope with a plurality of modulation/demodulation schemes. SOLUTION: A modulation circuit 100 is provided with a QPSK modulation circuit 102, an 8PSK modulation circuit 103, a 64QAM modulation circuit 104, a diffusion modulation circuit 107, a first OFDM modulation circuit 110, a second OFDM modulation circuit 111, switches 101, 105, 106, 108, 109 and 112 for switching a connection relationship for each modulation circuit, and a modulation control circuit 115 for flexibly coping with a plurality of modulation schemes by switching a modulation route by controlling the respective switches. COPYRIGHT: (C)2004,JPO
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