A new BIA scheme based on reconfigurable antennas

This paper considers the BIA implementation of K-user multiple-input single-output (MISO) interference channel (IC) without CSIT, in which each transmitter is equipped with Mk ≥ 3(k = 1, ..., K) antennas and each receiver has a reconfigurable antenna with Mk preset modes. Stemmed from the existing DoF-oriented BIA (D-BIA) scheme, we propose a new BIA scheme to reduce the frequency of mode switching on the reconfigurable antennas while ensuring the same DoF as D-BIA. The proposed BIA scheme is named as switching-oriented BIA (S-BIA). Theoretical analysis shows that S-BIA needs less frequency of mode switching than D-BIA. Particularly, S-BIA offers remarkable mode switching saving when the antenna number Mk ≤ 3.