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1. 发明申请

US20020037702A1 Transmitting and receiving apparatus 失效
标题翻译：发射和接收设备
公开(公告)号：US20020037702A1
公开(公告)日：2002-03-28
申请号：US09968773
申请日：2001-10-03
申请人： Mitsubishi Denki Kabushiki Kaisha
发明人： Hiroaki Nagano , Kazuhiro Mori , Kenji Itoh
IPC分类号： H04B001/40
CPC分类号： H03D7/163 , H03L7/23 , H04B1/00 , H04B1/403 , H04B1/406
摘要： A reception carrier wave, of which a frequency fL0 agrees with a frequency fRX of a reception wave, is generated, a first transmission carrier wave, of which a frequency fL1 is equivalent to twice of a difference value between the reception frequency and a frequency fTX of a transmission wave, is generated, and a second transmission carrier wave of which a frequency fL2 is equivalent to a difference value between the frequency fL0 and the frequency fL1, is generated. The reception carrier wave mixed with the reception wave to produce a reception signal. The frequency of the first transmission carrier wave is halved, and the first transmission carrier wave is mixed with a transmission signal to produce a modulated wave. The second transmission carrier wave is mixed with the modulated wave to produce a transmission wave. Therefore, because either the frequency of the first transmission carrier wave or the frequency of the second transmission carrier wave does not agree with each of the frequency of the modulated wave and the frequency fTX, the degradation of the modulation precision on a transmission side can be prevented. Also, because the frequency of the first transmission carrier wave is halved, the interference of the first transmission carrier wave with the transmission signal band can be reduced.
摘要翻译：产生频率fL0与接收波的频率fRX一致的接收载波，其频率fL1等于接收频率和频率fTX之间的差值的两倍的第一传输载波并且产生频率fL2等于频率fL0和频率fL1之间的差值的第二传输载波。接收载波与接收波混合以产生接收信号。第一传输载波的频率减半，并且第一传输载波与传输信号混合以产生调制波。第二传输载波与调制波混合以产生传输波。因此，由于第一发送载波的频率或第二发送载波的频率与调制波的频率和频率fTX不一致，所以发送侧的调制精度的劣化可以是防止了此外，由于第一传输载波的频率减半，所以可以减少第一传输载波与传输信号频带的干扰。

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