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CDI Rate-balancing with Per-base-station Constraints

机译:具有每个基站限制的CDI速率平衡

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We previously introduced a rate-balancing precoding technique based on channel distribution information, which significantly reduces the impact of pilot-contamination in the downlink of a massive MIMO system. We now extend the ratebalancing optimization problem for the precoders to multiple power constraints, to be able to apply the technique in a coordinated multi-point setting. For this problem, we derive an efficient and adaptive method to find a globally optimal solution based on transformation in the dual uplink. Finally, the results are compared to the optimization with a single sum-power constraint, where the beamforming vectors are simply scaled to satisfy the constraints at each base station.
机译:先前,我们基于信道分布信息引入了一种速率平衡预编码技术,该技术可显着降低大规模MIMO系统的下行链路中导频污染的影响。现在,我们将预编码器的速率平衡优化问题扩展到多个功率约束,以便能够在协调的多点设置中应用该技术。针对此问题,我们导出了一种高效且自适应的方法,以基于双上行链路中的变换来找到全局最佳解决方案。最后,将结果与具有单个总功率约束的最优化进行比较,在该约束中,简单地缩放波束形成矢量以满足每个基站的约束。

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