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1. 发明授权

US08953716B1 DC offset estimation and compensaton for wideband systems 有权
标题翻译：宽带系统的直流偏移估计和补偿
公开(公告)号：US08953716B1
公开(公告)日：2015-02-10
申请号：US13611731
申请日：2012-09-12
申请人： GuruGuha Venkatasubramanian , Balasubramanian Ramachandran
发明人： GuruGuha Venkatasubramanian , Balasubramanian Ramachandran
IPC分类号： H03K9/00
CPC分类号： H04L25/061
摘要： Systems, methods, and other embodiments associated with a DC notch gear filter are described. According to one embodiment, an apparatus includes a digital high pass filter having a cutoff frequency and a gear mechanism configured to successively change the cutoff frequency of the high pass filter based on a sequence of cutoff frequencies. The apparatus also includes a direct current (DC) estimator configured to estimate a DC offset of a digital input signal to the high pass filter based, at least in part, on an output signal of the high pass filter as a cutoff frequency is successively changed. A direct current (DC) compensator is configured to subtract the estimated DC offset from the input signal to the high pass filter.
摘要翻译：描述了与直流凹口齿轮过滤器相关联的系统，方法和其它实施例。根据一个实施例，一种装置包括具有截止频率和齿轮机构的数字高通滤波器，其被配置为基于截止频率序列连续改变高通滤波器的截止频率。该装置还包括直流（DC）估计器，其被配置为至少部分地基于高通滤波器的输出信号来估计数字输入信号对高通滤波器的DC偏移，因为截止频率被连续地改变。直流（DC）补偿器被配置为从估计的直流偏移从输入信号减去高通滤波器。

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