Transmit Beamforming for the MISO Interference Channel With Asymmetric Link Gains
This paper proposes a transmit beamforming technique to cope with the problem of the Multiple Input Single Output Interference Channel (MISOIC). In this scenario, the achievable sum-rate is highly conditioned by the inter-user interference. Furthermore, optimizing the sum-rate is known to be a cumbersome problem. In order to deal with this problem, the authors approximate the sum-rate when the desired received signal power level is higher than the multiuser interference power level (i.e., when the Signal-to-Interference Ratio (SIR) is high).