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- W2110460200 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." @default.
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- W2110460200 date "2011-03-01" @default.
- W2110460200 modified "2023-09-26" @default.
- W2110460200 title "Joint interference cancellation and dirty paper coding for cognitive cellular networks" @default.
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- W2110460200 doi "https://doi.org/10.1109/wcnc.2011.5779461" @default.
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