Single Carrier Frequency Domain Equalizer for Underwater Wireless Communication
CMC '09 Proceedings of the 2009 WRI International Conference on Communications and Mobile Computing - Volume 01
Single-carrier space-time block-coded transmissions over frequency-selective fading channels
IEEE Transactions on Information Theory
Frequency domain equalization for single-carrier broadband wireless systems
IEEE Communications Magazine
Iterative Carrier Frequency Offset and Channel Estimation for Underwater Acoustic OFDM Systems
IEEE Journal on Selected Areas in Communications
Efficient Multicarrier Communication for Highly Spread Underwater Acoustic Channels
IEEE Journal on Selected Areas in Communications
Single-carrier block transmission in time reversal shortened underwater acoustic channels
Proceedings of the Eighth ACM International Conference on Underwater Networks and Systems
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Single-carrier block transmission (SCBT) has a great potential for providing higher bandwidth efficiency over frequency-selective channels with reduced computational complexity and low peak-to-average power ratio (PAPR). In this paper we propose a hybrid time-frequency domain equalization method for pseudorandom noise (PN) based single-carrier block transmissions. The proposed hybrid time-frequency domain equalizer includes two parts: a multi-channel frequency domain equalizer and a single channel adaptive time domain decision feedback equalizer (DFE). Bidirectional DFE and time-reversal diversity processing to cancel both residual post-cursor and pre-cursor intersymbol interference (ISI) is extended to hybrid time-frequency domain equalizer. Underwater acoustic communication systems with single transmitter and multiple receivers have been designed and tested in lake in 2011. At a distance of 1.8 km, the useful data rates around 1500-7000 bps were achieved with uncoded bit error rate (BER) 10--3-10--5 using the presented schemes. Experiment shows the performance can be enhanced by 1.5-3.8 dB in terms of output signal-to-noise ratio (SNR). A sea experiment was conducted with single transmitter and single receiver in 2012. At a distance of 625 m, the useful data rates around 8750 bps were achieved with uncoded bit error rates 10--2-10--3 using the presented schemes. Experiment shows the performance can be enhanced by 1.6-2 dB in terms of output SNR.