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Achievable Degrees of Freedom of the K-user MISO Broadcast Channel with Alternating CSIT via Interference Creation-Resurrection Mohamed Seif 1 , Amr El-Keyi 2 , and Mohammed Nafie 1,3 1 Wireless Intelligent Networks Center, Nile University, Egypt 2 Department of Systems and Computer Engineering, Carleton University, Canada 3 Dept. Of EECE, Cairo University, Egypt [email protected], [email protected], [email protected] Abstract System Model ICR Scheme Phase 1: Interference Creation T=1 Results Concluding Remarks VTC2016-Fall • Montréal, Canada • 18—21 September 2016 T=2 T=3 Phase 2: Interference Resurrection T=4 T=5 Fig.1: System Model Table: All synergistic CSIT patterns for the 3-user BC. Capacity Criterion Fig.2: DoF Comparison for broadcast channel between all delayed and alternating CSIT models Fig.3: DoF comparison for the K-user BC Fig. 4. Achievable DoF Region for the 3-user BC. • K-user MISO broadcast channel • Channel coefficients are generic • Global and perfect channel state information at receivers • Alternating CSIT model over the channel uses: References 1. A.Wagdy, A.Elkeyi, and M.Nafie, “On the Degrees of Freedom of SISO X-Channel with Alternating CSIT,” in Proc. IEEE ISIT, 2015. 2. M. A. Maddah-Ali and D. Tse, “Completely stale transmitter channel state information is still very useful,” IEEE Transactions on Information Theory vol. 58, no. 7, pp. 4418–4431, 2012. 3. R. Tandon, S. Jafar, S. Shamai Shitz, H. V. Poor et al. “On the synergis- tic benefits of alternating CSIT for the MISO broadcast channel,” IEEE Transactions on Information Theory vol. 59, no. 7, pp. 4106–4128,2013.
