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Decision Feedback Equalization for Underwater Acoustic Channels. Deepthi Chander (05407003) Pallavi Manohar (05407002). Features of Underwater Acoustic (UWA) channels. Underwater acoustic channels - severely bandlimited
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Decision Feedback Equalization for Underwater Acoustic Channels Deepthi Chander (05407003) Pallavi Manohar (05407002)
Features of Underwater Acoustic (UWA) channels • Underwater acoustic channels - severely bandlimited • High temporal and spatial variability of channel conditions and multipath propagation. • Digital transmission-severe ISI caused. • Non-Gaussian noise environments.
Simulation Set-up • Rayleigh fading for shallow water , medium-range channel • Slowly fading UWA channel (Currently, time invariant scenario) • Noise: AWGN, log-Normal • Decision Feedback Equalizer (DFE) • Adaptive algorithm: RLS
feedforward filter Input Estimated symbol Symbol decision + - - feedback filter + Adaptive Algorithm (RLS) error Training symbol Decision Feedback Equalizer
Further Work • Obtaining UWA channel model for time varying multipath: PROSIM (propagation channel simulator) Acoustic Toolbox (Ocean Acoustics Library)