MIMO decision feedback equalization from an H∞ perspective

Authors:
A.T. Erdogan;B. Hassibi;T. Kailath
Affiliations:
Electr. & Electron. Eng. Dept., Koc Univ., Istanbul, Turkey;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
2004

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Abstract

We approach the multiple input multiple output (MIMO) decision feedback equalization (DFE) problem in digital communications from an H∞ estimation point of view. Using the standard (and simplifying) assumption that all previous decisions are correct, we obtain an explicit parameterization of all H∞ optimal DFEs. In particular, we show that, under the above assumption, minimum mean square error (MMSE) DFEs are H∞ optimal. The H∞ approach also suggests a method for dealing with errors in previous decisions.