Multi-carrier modulation apparatus and transmitter using the same
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United States of America Patent
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Jul 8, 2003
Grant Date -
N/A
app pub date -
Jun 25, 1999
filing date -
Jun 26, 1998
priority date (Note) -
Expired
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Abstract
A multi-carrier modulation apparatus to which transmultiplexers are applied. A multiplexing signal is treated as a synthesis of a plurality of multiplexed signals which are separated by a wider interval than the multiplexing frequency interval. Signals of channels 1 to M continuously frequency-multiplexed at a channel interval f.sub.B are treated as a synthetic signal of signals of channel 1 to channel 2N-1 and signals of channel 1 to channel 2N which are frequency-multiplexed at a channel interval 2f.sub.B. Individual multiplexed signals are synthesized by a plurality of transmultiplexers of less multiplexing number to make characteristics of polyphase filters required for the transmultiplexers less sharp.
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