| 摘要 |
A radio communication apparatus comprises an analog I/Q signal generator, a digital demodulator, and an interference wave suppression control block. The interference wave suppression block detects a gain difference between an in-phase component and a double quadrature component, based on an input and output signals of a low pass filter in the digital demodulator and the output of the double quadrature mixer, and controls a reference voltage of an A/D converter in the digital demodulator. Therefore, it is possible to reduce the gain difference of the in-phase component and the quadrature component, and to effectively eliminate an interference wave mixed in a base band signal. Furthermore, a radio communication apparatus according to the present invention comprises an antenna input block, a reception block, a transmission block, and an in/out block. Because a frequency when sending data is equal to the frequency when receiving data, it is possible to quickly change transmission and reception. Accordingly, it is possible to effectively use time-slots and transfer data at high speed.
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