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On the sum capacity of the Gaussian x channel in the mixed interference regime

机译：混合干扰条件下高斯x信道的总容量

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摘要

In this paper, we analyze the Gaussian X channel in the mixed interference regime. In this regime, multiple access transmission to one of the receivers is shown to be close to optimal in terms of sum rate. Three upper bounds are derived for the sum capacity in the mixed interference regime, and the subregions where each of these bounds dominate the others are identified. The genie-aided sum capacity upper bounds derived also show that the gap between sum capacity and the sum rate of the multiple access transmission scheme is small for a significant part of the mixed interference region. For any δ > 0, the region where multiple access transmission to one of the receivers is within δ from sum capacity is determined.
机译：在本文中，我们分析了混合干扰条件下的高斯X通道。在这种情况下，就总和率而言，向接收器之一的多址传输已显示接近最佳状态。推导了混合干扰机制中总容量的三个上限，并确定了每个界限主导其他界限的子区域。得出的由遗传辅助的总和容量上限也表明，对于混合干扰区域的很大一部分，总和容量与多址传输方案的总和之间的差距很小。对于任何δ> 0，确定到多个接收器之一的多址传输在总容量的δ范围内的区域。

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