Invention Grant
US08781042B1 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
- Patent Title: Systems and methods for calibrating digital baseband DC offset in an OFDM receiver
- Patent Title (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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Application No.: US14050893Application Date: 2013-10-10
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Publication No.: US08781042B1Publication Date: 2014-07-15
- Inventor: Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
- Applicant: Marvell International Ltd.
- Applicant Address: BM Hamilton
- Assignee: Marvell International Ltd.
- Current Assignee: Marvell International Ltd.
- Current Assignee Address: BM Hamilton
- Main IPC: H03D1/04
- IPC: H03D1/04

Abstract:
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 receive 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.
Information query
IPC分类: