A Hybrid Linear/Nonlinear Approach to Channel Equalization Problems

Part of Advances in Neural Information Processing Systems 5 (NIPS 1992)

Bibtex Metadata Paper


Wei-Tsih Lee, John Pearson


Channel equalization problem is an important problem in high-speed communications. The sequences of symbols transmitted are distorted by neighboring symbols. Traditionally, the channel equalization problem is considered as a channel-inversion operation. One problem of this approach is that there is no direct correspondence between error proba(cid:173) bility and residual error produced by the channel inversion operation. In this paper, the optimal equalizer design is formulated as a classification problem. The optimal classifier can be constructed by Bayes decision rule. In general it is nonlinear. An efficient hybrid linear/nonlinear equalizer approach has been proposed to train the equalizer. The error probability of new linear/nonlinear equalizer has been shown to be bet(cid:173) ter than a linear equalizer in an experimental channel.