Title :
OFDM for underwater acoustic communications: Adaptive synchronization and sparse channel estimation
Author :
Stojanovic, Milica
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA
fDate :
March 31 2008-April 4 2008
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;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518853
