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
收藏
页码：2052 / 2068
页数：17
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