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MIT Electrical Engineering and Computer Science
EECS Event |
Tuesday, October 16, 2001
4:00 PM (reception following)
Room 35-225
LIDS Colloquium
Abstract
A wide variety of digital communication systems (particularly in wireless, satellite, deep-space, and sensor networks) operate in the power-limited region where both spectral efficiency (b/s/Hz) and energy-per-bit are relatively low. The information theoretic analysis of those channels, in addition to to leading to the most efficient bandwidth utilization, reveals design insights on good signaling strategies.
The tradeoff of spectral efficiency vs energy-per information bit (normalized to the noise level) is the key measure of the capacity of channels in the power-limited regime. This talk gives an overview of our recent results on the fundamental bandwidth-power tradeoff of a general class of fading channels in the wideband regime in which the spectral efficiency is small but nonzero.