发明申请
- 专利标题: OFFSET DIRECT CONVERSION RECEIVER
- 专利标题(中): 偏移直接转换接收器
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申请号: US12276449申请日: 2008-11-24
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公开(公告)号: US20100130156A1公开(公告)日: 2010-05-27
- 发明人: Hang Jin , John Grabner
- 申请人: Hang Jin , John Grabner
- 申请人地址: US CA San Jose
- 专利权人: CISCO TECHNOLOGY, INC.
- 当前专利权人: CISCO TECHNOLOGY, INC.
- 当前专利权人地址: US CA San Jose
- 主分类号: H04B1/10
- IPC分类号: H04B1/10
摘要:
An offset direct conversion receiver apparatus and corresponding receiving method are provided. A received wireless signal is directly downconverted and demodulated to a baseband offset frequency that is offset from zero frequency to produce an in-phase (I) baseband offset signal centered at the baseband offset frequency and a quadrature-phase (Q) baseband offset signal centered at the baseband offset frequency. The I baseband offset signal and Q baseband offset signal are bandpass filtered to produce an I bandpass signal and a Q bandpass signal, respectively. The I bandpass signal and the Q bandpass signal are downconverted from the baseband offset frequency to zero frequency to produce an I baseband receive signal and a Q baseband receive signal. A technique and logic are also provided to select the best baseband offset frequency used in an offset direct conversion receiver.
公开/授权文献
- US08249538B2 Offset direct conversion receiver 公开/授权日:2012-08-21
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