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On degrees of freedom of the cognitive mimo two-interfering multiple-access channels

Ayoughi, S. A ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1109/TVT.2012.2237529
  3. Publisher: 2013
  4. Abstract:
  5. 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
  6. Keywords:
  7. Genie-aided cognitive radio (CR) ; Cellular network ; Comparative analysis ; Degrees of freedom (DoF) region ; Interference alignment ; Multiple access channels ; Spatial degrees ; Up-link transmissions ; Uplink channel ; Cognitive radio ; Testbeds ; Transmitters ; Mechanics
  8. Source: IEEE Transactions on Vehicular Technology ; Volume 62, Issue 5 , 2013 , Pages 2052-2068 ; 00189545 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=6401201