Joint space-time interference cancellation and channel shortening
In this paper, we present a framework for the design of space-time equalizers that perform joint interference cancellation and channel shortening in multi-user multiple-input multiple-output frequency-selective channels. The space-time filter coefficients and the shortened channel vectors are jointly optimized to minimize the interference-plus-noise using training data. The receiver design is completed by using an appropriate Viterbi equalizer in the second stage for inter-symbol interference equalization. The design is adapted to two different detection schemes- independent detection and ordered successive interference cancellation. Simulation results have shown acceptable symbol error performance with both detection schemes.