发明名称 |
Modulation-demodulation apparatus and wireless communication apparatus |
摘要 |
A modulation-demodulation apparatus of a relatively simple arrangement is able to prevent a bad influence caused due to interference between two local oscillators and a portable wireless communication apparatus uses this modulation-demodulation apparatus. In a modulation-demodulation apparatus using a local oscillator (105) for use in direct conversion type of a receiving system and a local oscillator (104) for use with a transmitting system, a ratio (C/D) between a reception frequency and an oscillation frequency of the reception local oscillator (105) and a ratio (A/B) between a transmission frequency and an oscillation frequency of the transmission local oscillator are made different from each other. <IMAGE> |
申请公布号 |
EP1361667(A1) |
申请公布日期 |
2003.11.12 |
申请号 |
EP20030252742 |
申请日期 |
2003.04.30 |
申请人 |
SONY ERICSSON MOBILE COMMUNICATIONS JAPAN, INC.;ASAHI KASEI MICROSYSTEMS CO., LTD. |
发明人 |
KASAHARA, M.;MIYA, S.;NAKAYAMA, K. |
分类号 |
H04L27/18;H04B1/40;H04L27/34 |
主分类号 |
H04L27/18 |
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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