A practical Blind Interference Alignment scheme is devised for the broadcast channel where the users are equipped with reconfigurable antennas. The proposed scheme does not require any channel state information at the transmitter other than the signal-to-noise ratio and coherence time. By employing Blind Interference Alignment to transmit to sets of users in an orthogonal fashion, the proposed scheme aims at maximizing the sum-rate at a finite signal-to-noise ratio regime and allows to handle the supersymbol length according to the coherence time limitation. Through computer simulations, it is shown that the proposed scheme improves the sum-rate of the system considerably in comparison with the standard Blind Interference Alignment in practical scenarios.
['Maximo Morales Cespedes', 'Jorge Plata-Chaves', 'Ana Garcia Armada', 'Luc Vandendorpe']
A blind interference alignment scheme for practical channels