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
复制
发表时间:
2018
影响因子:
2.5
通讯作者:
Jafar, Syed Ali
Jafar, Syed Ali
中科院分区:
计算机科学2区
文献类型:
--
作者:
Davoodi, Arash Gholami;Jafar, Syed Ali

文献摘要

参考文献

被引文献

相似文献

本文得到了第一自由度(DoF)界,该界可证明对网络相干时间敏感,即,在干扰网络中的相干时间,其中所有信道经历相同的相干模式。这是通过一种新的自适应的对齐图像集的约束和解决各种开放的问题之前所指出的Naderi和Avestimehr和Gou等人。例如,一个必要和充分的条件,获得了最优的1/2自由度每个用户在一个部分连接的干扰网络,在接收机的信道状态信息(CSIR)是完美的,发射机处的信道状态信息(CSIT)是瞬时的,但限于有限的精度,并且网络相干时间是Tc=1。令人惊讶的是,即使有完美的CSIR和瞬时有限精度CSIT,网络相干时间也很重要,即,它具有DoF影响。
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.
具有部分CSIT的对称MIMO干扰信道的对齐图像集和GDoF
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
对齐图像集的总和不等式:用于稳健 GDoF 边界的工具
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
蜂窝盲干扰对齐的要素 - 对齐频率复用、无线索引编码和干扰分集
DOI: --
发表时间: 2012
期刊: arXiv.org
影响因子: --
作者:
S. Jafar
通讯作者: S. Jafar
通道不确定性下的对齐图像集:解决有限精度 CSIT 下自由度崩溃的猜想
DOI: 10.1109/tit.2016.2586918
发表时间: 2016
影响因子: 2.5
作者:
Arash Gholami Davoodi;S. Jafar
通讯作者: S. Jafar