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arXiv 1005.0404cs.ITmath.IT
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弱交叉链路高斯干扰-中继网络的近似容量

Approximate Capacity of Gaussian Interference-Relay Networks with Weak Cross Links

Soheil Mohajer, Suhas N. Diggavi, Christina Fragouli, David N. C. Tse

摘要:

在本文中,我们研究了高斯中继干扰网络,其中中继(助手)节点是为了促进竞争的信息流在无线网络中。我们专注于一个两阶段的中继干扰网络,其中有弱的交叉链接,导致网络的行为像一个链的Z高斯信道。对于这些高斯ZZ和ZS网络,我们建立了速率区域的近似表征。利用基因辅助技术建立了容量区域的外边界,该技术产生的边界比传统的割集外边界更清晰。对于ZZ网络的内界,我们提出了一种新的干扰管理方案,称为干扰中和,这是使用结构格码实现的。该技术允许空中干扰去除,而无需发射机完全访问干扰信号。对于ZZ和ZS网络,我们建立了一个新的网络分解技术,(近似)实现的容量区域。我们使用从相应的线性确定性版本的问题的精确表征中获得的见解,以建立高斯网络的近似表征。

英文摘要:

In this paper we study a Gaussian relay-interference network, in which relay (helper) nodes are to facilitate competing information flows over a wireless network. We focus on a two-stage relay-interference network where there are weak cross-links, causing the networks to behave like a chain of Z Gaussian channels. For these Gaussian ZZ and ZS networks, we establish an approximate characterization of the rate region. The outer bounds to the capacity region are established using genie-aided techniques that yield bounds sharper than the traditional cut-set outer bounds. For the inner bound of the ZZ network, we propose a new interference management scheme, termed interference neutralization, which is implemented using structured lattice codes. This technique allows for over-the-air interference removal, without the transmitters having complete access the interfering signals. For both the ZZ and ZS networks, we establish a new network decomposition technique that (approximately) achieves the capacity region. We use insights gained from an exact characterization of the corresponding linear deterministic version of the problems, in order to establish the approximate characterization for Gaussian networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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