发明名称 RADIO TRANSMITTER AND RECEIVER
摘要 <P>PROBLEM TO BE SOLVED: To provide a radio transmitter and receiver capable of detecting a free channel by accurately detecting the signal level of a reception signal. <P>SOLUTION: When a free channel is detected, a control unit 1 varies the frequency of a local oscillation signal oscillated by a local oscillator 3 to detect the level of a signal detected by a mixer 10. Consequently, the output signal of the mixer 10 is not affected by self-mixing of homodyne reception, so the signal level of the reception signal is accurately detected to accurately detect the free channel. <P>COPYRIGHT: (C)2008,JPO&INPIT
申请公布号 JP2007306241(A) 申请公布日期 2007.11.22
申请号 JP20060131767 申请日期 2006.05.10
申请人 MITSUBISHI ELECTRIC CORP 发明人 ANDO NOBUHIKO;HAYASHI RYOJI
分类号 H04B1/59 主分类号 H04B1/59
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