Blind interference alignment in the K-user MISO interference channel

We consider the K-user MISO interference channel where each transmitter has multiple antennas and each receiver has a reconfigurable antenna capable of switching among several pre-set modes. The channels in different modes are assumed to be independent. We propose an interference alignment scheme without channel information at transmitters. We show that the achievable degree of freedom of the proposed scheme outperforms that in the traditional K-user MISO interference channel without the reconfigurable antenna.