In this paper, we consider optimum space-time equalizers with unknown dispersive interference, consisting of a linear equalizer that both spatially and temporally whitens the interference and noise, followed by a decision-feedback equalizer or maximum-likelihood sequence estimator. We first present a unified analysis of the optimum space-time equalizer, and then show that, for typical fading channels with a given signal-to-noise ratio (SNR), near-optimum performance can be achieved with a finite-length equalizer. Expressions are given for the required filter span as a function of the dispersion length, number of cochannel interferers, number of antennas, and SNR, which are useful in the design of practical near-optimum space-time equalizers.
|Title of host publication||Adaptive Antennas for Wireless Communications|
|Publisher||John Wiley and Sons Inc.|
|Number of pages||11|
|ISBN (Print)||0780360168, 9780780360167|
|Publication status||Published - 2009 Jan 1|
ASJC Scopus subject areas
- Physics and Astronomy(all)