Radio communication apparatus

A radio communication apparatus capable of switching modulation schemes, the apparatus comprising:

• a QPSK modulation signal generator configured to modulate transmission data by a QPSK modulation scheme and to output a QPSK modulation signal;
• a 16QAM modulation signal generator configured to modulate transmission data by a 16QAM scheme and to output a 16QAM modulation signal;
• a radio processor configured to receive, as input, the QPSK modulation signal or the 16QAM modulation signal and to output a transmission signal;
• and
• a transmission power amplifier configured to amplify the transmission signal,
• wherein the QPSK modulation signal generator and the 16QAM modulation signal generator perform gain control so as to make an average transmission power of the 16QAM modulation signal power smaller than an average transmission power of the QPSK modulation signal.

A radio communication apparatus capable of switching modulation schemes, the apparatus comprising:

• 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 configured to modulate transmission data by a 64QAM scheme and to output a 64QAM modulation signal;
• a radio processor configured to receive, as input, the QPSK modulation signal or the 64QAM modulation signal and to output a transmission signal;
• and
• a transmission amplifier configured to amplify the transmission signal,
• wherein the radio processor performs a 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.

A radio communication apparatus capable of switching a modulation scheme, the apparatus comprising:

• a QPSK modulation signal generator configured to modulate transmission data by a QPSK modulation scheme and to output a QPSK modulation signal;
• a 16QAM modulation signal generator configured to modulate transmission data by a 16QAM scheme and to output a 16QAM modulation signal;
• a radio processor configured to receive, as input, the QPSK modulation signal or the 16QAM modulation signal and to output a transmission signal;
• and
• a transmission amplifier configured to amplify the transmission signal,
• wherein the radio processor performs a gain control so as to make an average transmission power of the 16QAM modulation signal smaller than an average transmission power of the QPSK modulation signal.