发明授权
US08582692B1 Systems and methods for calibrating digital baseband DC offset in an OFDM receiver
有权
用于在OFDM接收机中校准数字基带DC偏移的系统和方法
- 专利标题: Systems and methods for calibrating digital baseband DC offset in an OFDM receiver
- 专利标题(中): 用于在OFDM接收机中校准数字基带DC偏移的系统和方法
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申请号: US13613212申请日: 2012-09-13
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公开(公告)号: US08582692B1公开(公告)日: 2013-11-12
- 发明人: Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
- 申请人: Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
- 申请人地址: BM Hamilton
- 专利权人: Marvell International Ltd.
- 当前专利权人: Marvell International Ltd.
- 当前专利权人地址: BM Hamilton
- 主分类号: H04L25/06
- IPC分类号: H04L25/06
摘要:
In accordance with the teachings described herein, systems and methods are provided for calibrating DC offset in a receiver. A DC calibration circuit may be used that is configured to remove DC offset from a digital multi-carrier modulated (MCM) signal that includes a sequence of MCM symbols. The DC calibration circuit may include an accumulator and a compensator. The accumulator may be used to determine an estimated DC offset of a current MCM symbol in the sequence of MCM symbols. The compensator may be used to remove the estimated DC offset from a next MCM symbol in the sequence of MCM symbols. The accumulator may also be used to receive a plurality of digital samples that comprise the current MCM symbol and to determine the estimated DC offset by calculating an average of the plurality of digital samples.