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2010
IEEE

Frequency-Domain Oversampling for Zero-Padded OFDM in Underwater Acoustic Communications

10 years 9 months ago
Frequency-Domain Oversampling for Zero-Padded OFDM in Underwater Acoustic Communications
Although time-domain oversampling of the received baseband signal is common for single-carrier transmissions, the counterpart of frequency-domain oversampling is rarely used for multicarrier transmissions. In this paper, we explore frequencydomain oversampling to improve the system performance of zero-padded OFDM transmissions over underwater acoustic channels with large Doppler spread. We use a signal design that enables separate sparse channel estimation and data detection, rendering a low complexity receiver. Based on both simulation and experimental results, we observe that the receiver with frequency-domain oversampling outperforms the conventional one considerably in channels with moderate and large Doppler spreads, and the gain increases as the Doppler spread increases. Although a raised-cosine pulse-shaping window can be used to improve the system performance relative to a rectangular window at the expense of data rate reduction, the performance gain is much less than that brou...
Zhaohui Wang, Shengli Zhou, Georgios B. Giannakis,
Added 11 Feb 2011
Updated 11 Feb 2011
Type Journal
Year 2010
Where GLOBECOM
Authors Zhaohui Wang, Shengli Zhou, Georgios B. Giannakis, Christian R. Berger, Jie Huang
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