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arXiv · 0908.3171

On the Optimality of Beamforming for Multi-User MISO Interference Channels with Single-User Detection

Xiaohu Shang·Biao Chen·H. Vincent Poor
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Abstract

For a multi-user interference channel with multi-antenna transmitters and single-antenna receivers, by restricting each receiver to a single-user detector, computing the largest achievable rate region amounts to solving a family of non-convex optimization problems. Recognizing the intrinsic connection between the signal power at the intended receiver and the interference power at the unintended receiver, the original family of non-convex optimization problems is converted into a new family of convex optimization problems. It is shown that, for such interference channels with each receiver implementing single-user detection, transmitter beamforming can achieve all boundary points of the achievable rate region.

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Xiaohu Shang, Biao Chen, H. Vincent Poor. 2009-08-21. On the Optimality of Beamforming for Multi-User MISO Interference Channels with Single-User Detection. https://arxiv.org/abs/0908.3171

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