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Interference cancellation for spectrum shared femtocell networks with macrocell information feedback

Interference cancellation for spectrum shared femtocell networks with macrocell information feedback,10.1109/ICUFN.2011.5949166,Massa Ndong,Takeo Fuji

Interference cancellation for spectrum shared femtocell networks with macrocell information feedback  
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Spectrum sharing usage in two-tier networks miti- gates spectrum scarcity and contributes in satisfying the growing demands for wireless broadband. This paper addresses the Up- link cross-tier interference problem in femtocell system resulting from a spectrum underlay access between a primary system based on a macrocell base station, i.e eNodeB (eNB), with its macrocell user equipments (MUE), and a secondary system based on a femtocell base station, i.e Home eNodeB (HeNB), with its home femtocell user equipments (HUE). We propose a resilient solution to the near-far effect issue by utilizing the interfering macrocell information feedback through infrastructure network at the HeNB for interfered signal recovery of the symbols sent by the HUE. Our proposed method is evaluated by simulation and the results show that the MUE interference can be canceled. Index Terms—Macrocell, femtocell, two-tier networks, MMSE, Interference.
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