<div class="description">
<p>Direct-Sequence Spread Spectrum (DSSS) modulation is being advanced as the physical-layer basis for Seaweb undersea acoustic networking. DSSS meets the need for channel tolerance, transmission security, and multi-user access. This thesis investigates the performance of subspace-decomposition blind-equalization algorithms as alternatives to RAKE processing of DSSS signals. This approach is tailored for superior performance in time-dispersive and frequency-dispersive channels characteristic of ocean acoustic propagation. Transmitter and receiver structures are implemented in Matlab and evaluated with a statistics-based model of a doubly spread channel with additive noise. Receiver performance is examined using Monte Carlo simulation. Biterror rates versus signal-to-noise ratio are presented for various multipath assumptions, noise assumptions, and receiver synchronization assumptions.
</p>
<br>Subjects: Underwater acoustics; Acoustic communications; Underwater communications; Underwater networks; Undersea warfare; Statistics-based channel modeling; Direct-sequence spread spectrum; Blind equalization; Suspace composition; DSSS; DSCDMA; Telesonar; Seaweb</div>
<div class="fn value">
Pelekanos, Georgios N.</div>
Internet Archive identifier