| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately correct a phase error and an amplitude error between I and Q signals, thereby suppressing an image noise effectively. <P>SOLUTION: The receiver includes an IF signal generating portion 10 for generating an intermediate frequency signal, and an amplitude error correcting portion 15 for setting a gain of an amplitude correcting portion 12 to eliminate the amplitude error between a signal processed by a first signal processing system for an I signal and a signal processed by a second signal processing system for a Q signal when the intermediate frequency signal generated by the IF signal generating portion 10 is selected by switches 7I and 7Q, by correcting the amplitude error using the intermediate frequency signal generated by the IF signal generating portion 10 in place of an intermediate frequency signal generated by processing an actual received signal, it is possible to accurately detect the amplitude error without being affected by a phase error by using a signal which does not include a phase error caused by variations in elements of mixers 4I and 4Q and a 90 DEG phase shifter 6 themselves. <P>COPYRIGHT: (C)2009,JPO&INPIT |
