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Link-Layer Adaptation for Wireless Data
Networks
Abstract
The objective of this project is to improve the design
of link layer retransmission protocols for wireless packet data
communications. This work builds upon our past collaboratie work on
iterative (turbo) equalization for EDGE. In order to reduce the
amount of training overhead needed for the adaptive equalizer, we
have applied reduced- rank estimation techniques. These techniques
can also simplify the equalizer. We have also extended these
algorithms to space-time equalization and equalization of
multi-input/multi-output channels, which correspond to multiple
transmit and receive antennas. Simulation results show that with
limited training, the reduced-rank equalizer can offer a substantial
performance improvement relative to the conventional (full-rank)
equalizer.
Students
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