长时延环境下多普勒频偏估计与补偿技术

Information Technology(2012)

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Abstract
长时延信道模型中相对多普勒频偏比一般的无线信道要大若干个数量级。典型的长时延信道有:水声信道,卫星通信信道等。水声信道中多普勒频偏不仅表现在频域上,还表现在时域上的压缩和扩展。文中对水声OFDM系统中宽带多普勒频偏提出了估计与补偿算法,可以有效消除宽带多普勒频偏的影响。
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Key words
underwater acoustic communication,wideband Doppler offset,zero-padding OFDM
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