On Degrees of Freedom of the Cognitive MIMO Two-Interfering Multiple-Access Channels
| Autor: | Masoumeh Nasiri-Kenari, Babak Hossein Khalaj, S. A. Ayoughi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Engineering
Computer Networks and Communications business.industry Degrees of freedom MIMO Transmitter Aerospace Engineering Co-channel interference Topology Multi-user MIMO Cognitive radio Automotive Engineering Cellular network Electronic engineering Electrical and Electronic Engineering Radio resource management business Computer Science::Information Theory |
| Zdroj: | IEEE Transactions on Vehicular Technology. 62:2052-2068 |
| ISSN: | 1939-9359 0018-9545 |
| DOI: | 10.1109/tvt.2012.2237529 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|