发明名称 |
UP-CONVERSION HOMODYNE RECEIVER FOR CABLE TELEVISION CONVERTER WITH FREQUENCY OFFSET TO AVOID ADJACENT CHANNEL INTERFERENCE |
摘要 |
A carrier is received containing a plurality of signals within a first frequency band, for example television signals within the cable television band. The signals are upconverted to a second frequency band above the first band wherein a selected one of the upconverted signals will reside at an intermediate frequency within the second band. The selected upconverted signal is input to a homodyne detector operating at or near intermediate frequency. In-phase and quadrature signals output from the homodyne detector are digitally processed to recover a baseband signal. <IMAGE> |
申请公布号 |
AU621272(B2) |
申请公布日期 |
1992.03.05 |
申请号 |
AU19900066867 |
申请日期 |
1990.11.22 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
DANIEL MARZ |
分类号 |
H04B1/10;H04B1/26;H04B1/30;H04N7/10;H04N7/16 |
主分类号 |
H04B1/10 |
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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