Evaluation of frequency offset and Doppler effect in terrestrial RF and in underwater acoustic OFDM systems
Evaluation of frequency offset and Doppler effect in terrestrial RF and in underwater acoustic OFDM systems
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DOI：
10.1109/milcom.2008.4753547
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发表时间：
2008-11
期刊：
影响因子：
--
通讯作者：
S. Ahmed;H. Arslan
中科院分区：
文献类型：
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作者：
S. Ahmed;H. Arslan
在正交频分复用（OFDM）中，频率偏移和多普勒效应会导致正交性的损失，这反过来会严重降低接收机的性能。传统上，大多数文献处理OFDM子载波上的非变化多普勒效应。然而，在陆地超宽带（UWB）OFDM射频（RF）和高数据速率水声通信（UAC）中，多普勒效应在OFDM频带上变化很大。本文将通过分析和仿真来研究频偏和多普勒变化的影响，以保持正交性或补偿正交性的损失。据作者所知，这种类型的详细分析是不存在于这些领域，因此本文提供了一个有价值的贡献。
Frequency offset and Doppler effect cause loss of orthogonality in orthogonal frequency division multiplexing (OFDM), which in turn may severely degrade receiver performance. Traditionally, most of the literature dealt with non-varying Doppler effect over OFDM subcarriers. However, in terrestrial ultra-wideband (UWB) OFDM radio frequency (RF) and in high data rate underwater acoustic communication (UAC), the effect of Doppler varies considerably over OFDM band. This paper will investigate the frequency offset and the varying effect of Doppler through analysis and simulation in both domains in order to maintain orthogonality or to compensate loss of orthogonality. To the best knowledge of the authors, this type of detailed analysis is not present in these domains, and thus this paper provides a valuable contribution.