Carrier frequency offset estimation for OFDM systems with time-varying DC Offset

被引：0
|
作者：
Tao Liu
Hanzhang Li
机构：
[1] University of Science and Technology Beijing,School of Automation & Electrical Engineering
[2] China Mobile Group Shandong Co.,undefined
[3] Ltd.,undefined
来源：
EURASIP Journal on Advances in Signal Processing | / 2012卷
关键词：
Orthogonal Frequency Division Multiplex; High Pass Filter; Orthogonal Frequency Division Multiplex System; Carrier Frequency Offset; Cyclic Prefix;
D O I：
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中图分类号：
学科分类号：
摘要：
Orthogonal frequency division multiplexing (OFDM) systems with direct-conversion architecture suffer from both carrier frequency offset (CFO) and dc offset (DCO). In this paper, we study CFO estimation problem for OFDM systems with time-varying DCO (TV-DCO) caused by gain mode switch of low noise amplifier (LNA). Based on linear approximation of TV-DCO, a blind algorithm is proposed for CFO estimation by means of DCO compensation and power leakage minimization. Performance of the proposed algorithm is demonstrated by simulations.
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