Alamouti space time coded OFDM for underwater acoustic channels

Alamouti space-time coding is investigated in conjunction with OFDM modulation for high-rate underwater acoustic communications over time varying channels. The scheme's diversity gain is exploited using a low-complexity adaptive multichannel receiver. Performance is demonstrated using experimental data transmitted in a 10 kHz bandwidth over a 1 km shallow water channel south of the Martha's Vineyard island in New England. The two-transmitter Alamouti scheme shows the expected improvement over the same-rate single-transmitter scheme.

[1]  R.F. Ormondroyd,et al.  Comparison of space-time block code and layered space-time MIMO systems for an underwater acoustic channel , 2005, Europe Oceans 2005.

[2]  P. Willett,et al.  MIMO-OFDM for High-Rate Underwater Acoustic Communications , 2009, IEEE Journal of Oceanic Engineering.

[3]  Ali H. Sayed,et al.  Efficient adaptive receivers for joint equalization and interference cancellation in multiuser space-time block-coded systems , 2003, IEEE Trans. Signal Process..

[4]  T.M. Duman,et al.  High-Rate Communication for Underwater Acoustic Channels Using Multiple Transmitters and Space–Time Coding: Receiver Structures and Experimental Results , 2007, IEEE Journal of Oceanic Engineering.

[5]  Gerhard Fettweis,et al.  Numerical performance evaluation for Alamouti space time coded OFDM under receiver impairments , 2009, IEEE Transactions on Wireless Communications.

[6]  Milica Stojanovic,et al.  MIMO OFDM over underwater acoustic channels , 2009, 2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers.

[7]  Andreas Polydoros,et al.  Inter-Frame, Fine Frequency/Phase Synchronization forSimple Space-Time-Coded OFDM Receivers , 2007, IEEE Transactions on Wireless Communications.

[8]  Robert W. Heath,et al.  Receiver designs for Alamouti coded OFDM systems in fast fading channels , 2005, IEEE Transactions on Wireless Communications.

[9]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[10]  T. Oberg,et al.  Iterative Reception for Acoustic Underwater MIMO Communications , 2006, OCEANS 2006.

[11]  Mark C. Reed,et al.  An Iterative Receiver with Channel Estimation for MIMO-OFDM Over a Time and Frequency Dispersive Fading Channel , 2007, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.