On the Generalized Degrees of Freedom of Noncoherent Interference Channel
On the Generalized Degrees of Freedom of Noncoherent Interference Channel
复制标题
非相干干扰信道的广义自由度
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
S. Diggavi
中科院分区：
文献类型：
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作者：
Joyson Sebastian;S. Diggavi
研究了具有相干时间为T符号持续时间和对称衰落统计量的块衰落非相干2用户干扰信道（IC）的广义自由度。我们证明了一种基于自然训练的方案，用于操作非相干集成电路，在几种情况下是次优的。作为一种替代方案，我们提出了一种新的非相干速率分裂方案。我们还考虑了处理干扰即噪声（TIN）方案和时分复用（TDM）方案。我们观察到，在几种情况下，基于训练的标准集成电路方案的性能优于这些方案之一：我们的结果表明，对于低平均干扰噪声比（INR）， TIN是最好的；在高INR情况下，时分复用和非相干分频具有较好的性能。我们还研究了带反馈的非相干集成电路，并提出了一种非相干速率分裂方案。同样，对于反馈情况，我们的结果表明，基于自然训练的方案可以优于其他方案。
We study the generalized degrees of freedom (gDoF) of the block-fading noncoherent 2-user interference channel (IC) with a coherence time of T symbol durations and symmetric fading statistics. We demonstrate that a natural training-based scheme, to operate the noncoherent IC, is suboptimal in several regimes. As an alternate scheme, we propose a new noncoherent rate-splitting scheme. We also consider treating interference-as-noise (TIN) scheme and a time division multiplexing (TDM) scheme. We observe that a standard training-based scheme for IC is outperformed by one of these schemes in several regimes: our results demonstrate that for low average interference-to-noise ratio (INR), TIN is best; for high INR, TDM and the noncoherent rate-splitting give better performance. We also study the noncoherent IC with feedback and propose a noncoherent rate-splitting scheme. Again for the feedback case as well, our results demonstrate that a natural training-based scheme can be outperformed by other schemes.