Joint interference cancellation and dirty paper coding for cognitive cellular networks

Mohammad Shahmohammadi, O. Ozan Koyluoglu, Tamer M.S. Khattab, Hesham El Gamal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Downlink communication in a cellular network with a cognitive (secondary) cell is considered. In our model, the base station of the cognitive cell knows the messages of the other cell non-causally. We propose a new interference cancellation technique that zero forces the intra-cell interference in the primary cell by the help of the cognitive base station. In addition, as the primary messages are known at the cognitive base station, the interference caused by the primary base station on the secondary users are canceled using dirty paper coding (DPC). Moreover, we provide an outer bound on the achievable degrees of freedom (DoF) region and show that for some special cases the proposed signaling scheme is sum DoF optimal for the considered system when the cognitive cell operates at its maximum sum DoF. The benefit of the cognitive paradigm is also established using the derived outer-bound and showing that the achieved sum DoF is strictly larger than the case when cognitive message sharing is unavailable.

Original languageEnglish (US)
Title of host publication2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
Pages1972-1976
Number of pages5
DOIs
StatePublished - Jun 23 2011
Event2011 IEEE Wireless Communications and Networking Conference, WCNC 2011 - Cancun, Mexico
Duration: Mar 28 2011Mar 31 2011

Publication series

Name2011 IEEE Wireless Communications and Networking Conference, WCNC 2011

Other

Other2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
CountryMexico
CityCancun
Period3/28/113/31/11

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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    Shahmohammadi, M., Koyluoglu, O. O., Khattab, T. M. S., & El Gamal, H. (2011). Joint interference cancellation and dirty paper coding for cognitive cellular networks. In 2011 IEEE Wireless Communications and Networking Conference, WCNC 2011 (pp. 1972-1976). [5779461] (2011 IEEE Wireless Communications and Networking Conference, WCNC 2011). https://doi.org/10.1109/WCNC.2011.5779461