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1. 发明授权

US08582692B1 Systems and methods for calibrating digital baseband DC offset in an OFDM receiver 有权
标题翻译：用于在OFDM接收机中校准数字基带DC偏移的系统和方法
公开(公告)号：US08582692B1
公开(公告)日：2013-11-12
申请号：US13613212
申请日：2012-09-13
申请人： Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
发明人： Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
IPC分类号： H04L25/06
CPC分类号： H04L27/2647 , 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.
摘要翻译：根据本文所述的教导，提供了用于校准接收机中的DC偏移的系统和方法。可以使用DC校准电路，其被配置为从包括MCM符号序列的数字多载波调制（MCM）信号中去除DC偏移。 DC校准电路可以包括蓄电池和补偿器。可以使用累加器来确定MCM符号序列中的当前MCM符号的估计DC偏移。补偿器可以用于从MCM符号序列中的下一个MCM符号中去除估计的DC偏移。累加器还可以用于接收包括当前MCM符号的多个数字样本，并且通过计算多个数字样本的平均值来确定估计的DC偏移。

2. 发明授权

US08279955B1 Systems and methods for calibrating digital baseband DC offset in an OFDM receiver 有权
标题翻译：用于在OFDM接收机中校准数字基带DC偏移的系统和方法
公开(公告)号：US08279955B1
公开(公告)日：2012-10-02
申请号：US12353391
申请日：2009-01-14
申请人： Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
发明人： Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
IPC分类号： H04K1/10
CPC分类号： H04L27/2647 , 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 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.
摘要翻译：根据本文所述的教导，提供了用于校准接收机中的DC偏移的系统和方法。可以使用DC校准电路，其被配置为接收包括MCM符号序列的数字多载波调制（MCM）信号。 DC校准电路可以包括蓄电池和补偿器。可以使用累加器来确定MCM符号序列中的当前MCM符号的估计DC偏移。补偿器可以用于从MCM符号序列中的下一个MCM符号中去除估计的DC偏移。累加器还可以用于接收包括当前MCM符号的多个数字样本，并且通过计算多个数字样本的平均值来确定估计的DC偏移。

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