On Degrees of Freedom of the Cognitive MIMO Two-Interfering Multiple-Access Channels

被引：8

作者：

Ayoughi, Seyed Arvin ^{[1
]}

Nasiri-Kenari, Masoumeh ^{[1
]}

Khalaj, Babak Hossein ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Elect Engn, Tehran, Iran

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2013年 / 62卷 / 05期

关键词：

Degrees of Freedom (DoF) region; genie-aided cognitive radio (CR); interference alignment (IA); uplink channel; INTERFERENCE ALIGNMENT;

D O I：

10.1109/TVT.2012.2237529

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper characterizes the exact spatial Degrees of Freedom (DoF) region of the two-user multiple-input-multiple-output two-interfering multiple-access channels (2-IMACs), which models the uplink transmission in cellular networks, for three scenarios. The first scenario is the 2-IMAC without cognition, for which the achievability is generalized for more than two transmitters in each multiple-access channel. The two-user 2-IMACs' DoF regions are also derived for two different genie-aided cognition scenarios. Here, zero forcing by transmitters and interference alignment are studied in a network with more than two transmitters, whereas previous works dealt with two-transmitter networks. We also perform a comparative analysis on the DoF of the three scenarios.

引用

页码：2052 / 2068

页数：17

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