Communication Over Doubly Selective Channels: Efficient Equalization and Max-Diversity Precoding

Date Added: Dec 2009
Format: PDF

The authors consider the problem of practical communication over a Doubly Selective (DS) channel, i.e., a time and frequency selective channel. The problem is approached in two different ways: coherent communication and non-coherent communication, and for each communication scheme they propose practical and near-optimal equalizers and maximum-diversity precoders. Toward these ends, they adopt Basis Expansion (BE) modeling of the channel, which allows for an efficient and unified way of describing a DS channel in both time and frequency domain; and Tree-Search Algorithms (TSAs), which facilitate near-optimal performance with low complexity.