On Spatio-Temporal Interference Rejection Combining with Antenna Arrays

Abstract

In this work, space-time processing for co-channel interference (CCI) reduction and intersymbol interference (ISI) equalization with antenna arrays is studied. As compared to spatial-only processing, the space-time processing proposed takes the temporal correlation of the CCI into account by modeling the noise and CCI as a Gaussian vector valued autoregressive process. This is a good approximation in interference limited scenarios and suitable for implementation with a maximum likelihood sequence estimator. For spatial-only processing, the time dispersion of the CCI may limit the performance, whereas this is not the case with space-time processing. Space-time processing provides large gains in interference rejection as compared to spatial-only processing when time dispersion increases the dimension of the subspace to which the interference is confined. 1. INTRODUCTION To meet the increasing demands on higher data rates, quality, coverage and capacity of wireless systems, the use of an..