发明授权
- 专利标题： Tracking automatic gain control of orthogonal frequency domain multiplexing systems
- 专利标题（中）： 跟踪正交频域复用系统的自动增益控制
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申请号： US11963294申请日： 2007-12-21
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公开(公告)号： US07970066B1公开(公告)日： 2011-06-28
- 发明人: Jungwon Lee , Qing Zhao , Hui-Ling Lou
- 申请人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
- 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： H04L27/28
- IPC分类号： H04L27/28
摘要：
A system includes an input, a variable gain amplifier (VGA), and an automatic gain control (AGC) module. The input receives an input signal. The input signal includes frames of N symbols modulated using orthogonal frequency division multiplexing (OFDM), wherein a cyclic prefix (CP) precedes each of the N symbols, and wherein N is an integer greater than 1. The VGA provides a gain when amplifying the input signal. The AGC module selectively adjusts the gain of the VGA during the CP preceding M of the N symbols, wherein M is an integer greater than 1.
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