Radio communication apparatus capable of switching...

Details Radio communication apparatus capable of switching... Radio communication apparatus capable of switching...

2006-01-23

2010-06-15

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Transmitters

C375S297000, C375S298000, C375S308000

Reexamination Certificate

active

07738590

ABSTRACT:
A radio communication apparatus capable of switching modulation schemes includes a QPSK modulation signal generator configured to modulate transmission data by a QPSK modulation scheme and to output a QPSK modulation signal. A 64QAM modulation signal generator is configured to modulate transmission data by a 64QAM scheme and to output a 64QAM modulation signal. A radio processor is configured to receive, as an input, the QPSK modulation signal or the 64 QAM modulation signal and to output a transmission signal. A transmission power amplifier is configured to amplify a power of the transmission signal. The QPSK modulation signal generator and the 64QAM modulation signal generator perform gain control so as to make an average transmission power of the 64QAM modulation signal smaller than an average transmission power of the QPSK modulation signal.

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