发明授权
US08499328B2 Agile distortion and noise cancellation across multiple channels and ports in a CATV upconverter/modulator
有权
CATV上变频器/调制器中多个通道和端口的敏捷失真和噪声消除
- 专利标题： Agile distortion and noise cancellation across multiple channels and ports in a CATV upconverter/modulator
- 专利标题（中）： CATV上变频器/调制器中多个通道和端口的敏捷失真和噪声消除
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申请号： US13016169申请日： 2011-01-28
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公开(公告)号： US08499328B2公开(公告)日： 2013-07-30
- 发明人: Colin Howlett , Gerald Harron , Michael Jaspar
- 申请人： Colin Howlett , Gerald Harron , Michael Jaspar
- 申请人地址： CA Victoria, BC
- 专利权人： Vecima Networks Inc.
- 当前专利权人： Vecima Networks Inc.
- 当前专利权人地址： CA Victoria, BC
- 代理机构： Ade & Company Inc.
- 代理商 Adrian D. Battison
- 主分类号： H04N7/16
- IPC分类号： H04N7/16
摘要：
A distortion-cancellation method for analog CATV or QAM transmission over cable is provided wherein a single feedback path from the output of a multiple-channel multiple-port upconverter/modulator is down-converted and used to reduce or cancel undesirable noise components including LO leakage, spurious, and modulated noise. The method allows for real-time monitoring, tuning, or control of the CATV/QAM output and of interfering signals and aging effects as compared to a desired performance metric.
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