| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless reception device which can perform quadrature detection with a simple configuration as much as possible. <P>SOLUTION: The device includes a phase change circuit 48 which changes a phase of a reception signal by ninety degrees in a first circuit state, sends it to a reception mixer 50, and sends the reception signal to the reception mixer 50 without changing the phase of it in a second circuit state, a reception control unit 64 which performs a process of the reception signal in a first communication of which the phase change circuit 48 is set to the first circuit state, and performs a process of the reception signal in a second communication of which the phase change circuit 48 is set to the second circuit state to a signal equivalent to the first communication, and a signal process unit 66 which performs a signal process according to the output of the reception mixer 50 for each of the first communication and the second communication. Accordingly, the quadrature detection can be optimally performed with the configuration including the single mixer 50. <P>COPYRIGHT: (C)2009,JPO&INPIT |
