发明名称 |
Transceiver bandwidth extension using double mixing |
摘要 |
A radio transceiver system uses a single variable local oscillator frequency source which is used in mixing both before and after a band-pass filter. This causes a reduction in band-pass filter bandwidths. In an all-band transceiver for PCS for example the effect of this reduced bandwidth requirement is to increase the spacing between the transmit bands and the receive bands and thereby enable a reduction in transmission noise interfering with the reception bands.
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申请公布号 |
US6115363(A) |
申请公布日期 |
2000.09.05 |
申请号 |
US19970802692 |
申请日期 |
1997.02.19 |
申请人 |
NORTEL NETWORKS CORPORATION |
发明人 |
OBERHAMMER, WOLFGANG;ROWLAND, ANDY |
分类号 |
H03D7/16;H04B1/04;H04B1/26;(IPC1-7):H04B7/00 |
主分类号 |
H03D7/16 |
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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