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In order to improve the coverage and capacity of next generation cellular networks, low cost relays are deployed in the area, where users do not get required Signal to Noise Ratio (SNR) from the Base Station (BS), especially at the cell edge. In this paper, the authors analyze this interference in Relay based Orthogonal Frequency Division Multiplexing Access (OFDMA) system. They present an analytical model to characterize the interference experienced by a particular user in a reference cell from all interfering cells irrespective of the position of user. They consider the effect of path loss, shadowing and fading on interference powers from various cells. Then, they determine the Cumulative Distribution Function (CDF) of interference.
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