发明名称 |
RADIO RECEIVING APPARATUS AND RADIO COMMUNICATION SYSTEM |
摘要 |
High-quality reception of a radio signal is controlled by increasing the cut-off frequency and preventing suppression of the low-frequency component. A radio signal amplifying means (11) amplifies the received radio signal to generate an amplified signal. A frequency converting means (20) converts the radio signal from the radio frequency to an intermediate frequency by mixing a local oscillation signal and the amplified signal to generate an intermediate frequency signal. A frequency shift control means (31) shifts the frequency of the intermediate frequency signal to the higher side of the frequency band. A frequency inversion control means (32) inverts the low-frequency side of the intermediate frequency signal to the higher side of the frequency band and the high-frequency side to the lower side of the frequency band. An AC coupling means (40) is provided on the output side of a frequency control means (30). A radio signal demodulation means (50) demodulates the output signal from the AC coupling means (40).
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申请公布号 |
WO0182492(A1) |
申请公布日期 |
2001.11.01 |
申请号 |
WO2000JP02754 |
申请日期 |
2000.04.26 |
申请人 |
FUJITSU LIMITED;YOKOTA, YASUHIRO |
发明人 |
YOKOTA, YASUHIRO |
分类号 |
H03D3/00;H04B1/28;(IPC1-7):H04B1/30 |
主分类号 |
H03D3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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