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发明公开
CN101431343A 接收器 无效 - 撤回 转让

接收器
摘要：
一种接收器，能够准确地校正I信号和Q信号的相位误差及振幅误差，有效地抑制镜像噪声。包括：IF信号生成部(10)，生成中间频率信号；振幅误差校正处理部(15)，当切换器(7I)和(7Q)选择IF信号生成部(10)所生成的中间频率信号时，设定振幅校正部(12)的增益，使得消除用于I信号的第一信号处理系统所处理的信号及用于Q信号的第二信号处理系统所处理的信号的振幅误差。取代处理实际的接收信号而生成的中间频率信号，使用IF信号生成部(10)所生成的中间频率信号执行振幅误差的校正，使用不包含由于混频器(4I)和(4Q)及90°移相器(6)自身的元件偏差而造成的相位误差的信号，能够不受相位误差的影响而准确地检测振幅误差。
摘要（英）：

There are provided 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 an 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 an 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 an influence of a phase error by using a signal which does not include a phase error caused by a variation in elements of mixers 4I and 4Q and a 90 DEG phase shifter 6 themselves.

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