发明名称 |
Method and arrangement for transmitting and receiving RF signals through various radio interfaces of communication systems |
摘要 |
A method and an arrangement for transmitting and receiving RF signals, associated with different radio interfaces of communication systems, employ a direct conversion based transceiver which substantially comprises one receive signal branch and one transmit signal branch. Mixing frequencies of the different systems are generated by a single common synthesizer by use of an output frequency divider in combination with the synthesizer, and by use of filtering corresponding to a system channel bandwidth by means of a controllable low-pass filter operating at baseband frequency.
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申请公布号 |
US7415247(B1) |
申请公布日期 |
2008.08.19 |
申请号 |
US19990856746 |
申请日期 |
1999.11.25 |
申请人 |
NOKIA CORPORATION |
发明人 |
VAEISAENEN RISTO;KALTIOKALLIO KIM |
分类号 |
H04B1/04;H04B1/40;H04B1/00;H04B1/16;H04B1/30;H04B7/26 |
主分类号 |
H04B1/04 |
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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