Network Coherence Time Matters—Aligned Image Sets and the Degrees of Freedom of Interference Networks With Finite Precision CSIT and Perfect CSIR
Network Coherence Time Matters—Aligned Image Sets and the Degrees of Freedom of Interference Networks With Finite Precision CSIT and Perfect CSIR
复制标题
网络相干性时间很重要 - 具有有限精度 CSIT 和完美 CSIR 的对齐图像集和干扰网络的自由度
DOI:
10.1109/tit.2018.2837880
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发表时间:
2018
影响因子:
2.5
通讯作者:
Jafar, Syed Ali
中科院分区:
文献类型:
--
作者:
Davoodi, Arash Gholami;Jafar, Syed Ali
This paper obtains the first degrees of freedom (DoFs) bound that is provably sensitive to network coherence time, i.e., coherence time in an interference network, where all channels experience the same coherence patterns. This is accomplished by a novel adaptation of the aligned image sets bound and settles various open problems noted previously by Naderi and Avestimehr and by Gou et al. For example, a necessary and sufficient condition is obtained for the optimality of 1/2 DoF per user in a partially connected interference network, where the channel state information at the receivers (CSIRs) is perfect, the channel state information at the transmitters (CSITs) is instantaneous but limited to finite precision, and the network coherence time is Tc=1. The surprising insight that emerges is that even with perfect CSIR and instantaneous finite precision CSIT, the network coherence time matters, i.e., it has a DoF impact.
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DOI:
--
发表时间:
2017
期刊:
Global Communications Conference
影响因子:
--
作者:
Arash Gholami Davoodi;S. Jafar
通讯作者:
S. Jafar
DOI:
--
发表时间:
2016
期刊:
International Symposium on Information Theory
影响因子:
--
作者:
Arash Gholami Davoodi;S. Jafar
通讯作者:
S. Jafar
DOI:
--
发表时间:
2017
期刊:
International Symposium on Information Theory
影响因子:
--
作者:
Arash Gholami Davoodi;S. Jafar
通讯作者:
S. Jafar
DOI:
--
发表时间:
2012
期刊:
arXiv.org
影响因子:
--
作者:
S. Jafar
通讯作者:
S. Jafar
影响因子:
2.5
作者:
Arash Gholami Davoodi;S. Jafar
通讯作者:
S. Jafar