BLIND MIMO PARA-UNITARY EQUALIZATION
Ludwig Rota, Lieven De Lathauwer · 2004
This paper introduces a blind MIMO space-time equalizer for convolutive mixtures. A parametrization of the equalizer is proposed when observations have been pre-whitened. Theoretical developments lead to a numerical algorithm that sweeps all pairs of delayed outputs. This algorithm involves the solution of a low degree polynomial system, whose coefficients depend on the output cumulants. Next, another algorithm is derived that aims at finding the solution in a finite number of steps. The latter algorithm may be used to initialize the former. Simulations and performance of the numerical algorithms are also included.