Transmit beamforming for the MISO Interference Channel with asymmetric link gains
Document typeConference report
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This paper proposes a transmit beamforming technique to cope with the problem of the Multiple Input Single Out- put Interference Channel (MISO IC). 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 prob- lem, we 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). For that case, the sum-rate expression can be opti- mized distributively and it leads to a transmit beamformer that outperforms the existing decentralized techniques when the channel gains are asymmetric. Numerical simulations show the performance of the proposed technique which improves the existing decentralized designs for the MISO IC.
CitationVázquez, M.; Perez, A.; Lagunas, M. Transmit beamforming for the MISO Interference Channel with asymmetric link gains. A: IEEE International Conference on Acoustics, Speech, and Signal Processing. "2012 IEEE International Conference on Acoustics, Speech, and Signal Processing Proceedings, March 25-30, 2013, Kyoto Internatinal Conference Center Kyoto, Japan". Kyoto: 2012, p. 3225-3228.