Modulator, filter, method of controlling gain of filter, and code modulating method
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United States of America Patent
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Nov 13, 2012
Grant Date -
May 28, 2009
app pub date -
Sep 13, 2006
filing date -
Sep 28, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A modulator being made small in size, low in costs, low in power consumption, small in heat generation and spurious signals. The modulator includes multipliers (101, 102) for code-modulating received transmission data (D(n), C(n)), and outputting the modulated data, a control channel gain factor signal generator (106) for generating a gain control signal, a control channel gain factor signal generator (107), and weighting coefficient setting signal generators (108, 109) for receiving the output of the complex-number computing section (120) and controlling the gains of the raised cosine filters (110 to 113).
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