OFDM for underwater acoustic communications: Adaptive synchronization and sparse channel estimation

Author

Stojanovic, Milica

Author_Institution

Massachusetts Inst. of Technol., Cambridge, MA

fYear

2008

fDate

March 31 2008-April 4 2008

Firstpage

5288

Lastpage

5291

Abstract

A phase synchronization method, which provides non-uniform frequency offset compensation needed for wideband OFDM, is coupled with low-complexity channel estimation in the time domain. Sparsing of the channel impulse response leads to an improved performance, while adaptive synchronization supports decision-directed operation and yields low overhead. System performance is demonstrated using experimental data transmitted over a 1 km shallow water channel in the 19 kHz - 31 kHz band.

Keywords

OFDM modulation; channel estimation; communication complexity; synchronisation; transient response; underwater acoustic communication; adaptive synchronization; channel impulse response; decision-directed operation; frequency 19 kHz to 31 kHz; low-complexity channel estimation; nonuniform frequency offset compensation; phase synchronization method; sparse channel estimation; underwater acoustic communication; wideband OFDM; Channel estimation; Frequency estimation; Frequency synchronization; OFDM; Phase estimation; Time domain analysis; Transfer functions; Underwater acoustics; Underwater communication; Wideband; OFDM; Underwater acoustic communications; channel sparsing; non-uniform Doppler distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on

Conference_Location

Las Vegas, NV

ISSN

1520-6149

Print_ISBN

978-1-4244-1483-3

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2008.4518853

Filename

4518853