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AuthorShahmohammadi, Mohammad
AuthorKoyluoglu, O. Ozan
AuthorKhattab, Tamer M. S.
AuthorEl Gamal, Hesham
Available date2022-11-01T09:01:30Z
Publication Date2011
Publication Name2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
ResourceScopus
Resource2-s2.0-79959314357
URIhttp://dx.doi.org/10.1109/WCNC.2011.5779461
URIhttp://hdl.handle.net/10576/35673
AbstractDownlink 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. 2011 IEEE.
Languageen
SubjectCellular network
Dirty paper coding
Downlink communications
Interference cancellation
Interference-cancellation technique
Intra-cell interference
Outer bounds
Primary cells
Base stations
Cells
Cellular neural networks
Radio interference
Signal processing
Wireless telecommunication systems
Wireless networks
TitleJoint interference cancellation and dirty paper coding for cognitive cellular networks
TypeConference Paper
Pagination1972-1976
dc.accessType Abstract Only


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