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arXiv 0908.3171cs.ITmath.IT
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多用户MISO干扰信道下单用户检测波束形成的最优性研究

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

Xiaohu Shang, Biao Chen, H. Vincent Poor

摘要:

对于具有多天线发射机和单天线接收机的多用户干扰信道,通过将每个接收机限制为单用户检测器,计算最大可实现速率区域相当于解决一族非凸优化问题。识别在预期接收器处的信号功率和在非预期接收器处的干扰功率之间的内在联系,将原始的非凸优化问题族转换为新的凸优化问题族。结果表明,对于这样的干扰信道,每个接收机实现单用户检测,发射机波束成形可以实现所有的边界点的可达速率区域。

英文摘要:

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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