发明授权
- 专利标题: Direct conversion receiver with DC offset compensation
- 专利标题(中): 具有直流偏移补偿的直接转换接收器
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申请号: US11238644申请日: 2005-09-29
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公开(公告)号: US07409199B2公开(公告)日: 2008-08-05
- 发明人: Masatoshi Igarashi , Hiroshi Komori , Takeaki Watanabe
- 申请人: Masatoshi Igarashi , Hiroshi Komori , Takeaki Watanabe
- 申请人地址: JP Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Hamre, Schumann, Mueller & Larson, P.C.
- 优先权: JP2004-289766 20041001
- 主分类号: H04B1/10
- IPC分类号: H04B1/10
摘要:
A direct conversion receiver includes a mixer for converting an RF signal into a baseband signal, a dynamic DC offset compensator for compensating for a dynamic DC offset caused by the effect of second order nonlinear distortion of the mixer on an interfering wave that enters the input terminals of the mixer, and a static DC offset compensator for compensating for a static DC offset caused by self-mixing of a local signal and a leakage component of the local signal that appears at the input terminals of the mixer. The static DC offset compensation starts at a time t1 after a DC offset compensation operation has started. The static DC offset compensation is finished at the next time t2, and then the dynamic DC offset compensation starts. The dynamic DC offset compensation is finished at the next time t3. With this configuration, only a change in DC offset due to the dynamic DC offset is compensated after compensating for the static DC offset component. The dynamic DC offset compensator does not have an element for storing the magnitude of the static DC offset.
公开/授权文献
- US20060073803A1 Direct conversion receiver with DC offset compensation 公开/授权日:2006-04-06
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