Outage Performance for Heterogeneous Cellular Networks with Interference Cancellation
SONG Kang① WEI Lei② JI Baofeng①③ WANG Yafang① HUANG Yongming① YANG Lüxi①
①(School of Information Science and Engineering, Southeast University, Nanjing 210096, China) ②(State Grid Nanjing Power Supply Company, Nanjing 210019, China) ③(Information Engineering College, Henan University of Science and Technology, Luoyang 471023, China)
In heterogeneous cellular networks, small cells provide for the handover of users from the macro cell and organize itself during the transmission. This paper studies the downlink outage performance of heterogeneous cellular networks with an interference cancellation scheme employed at macro base station, which aims to eliminate the cross-tier interference from macro base station to small cell users. Then, the downlink performance of heterogeneous cellular networks is investigated. Expressions of the Probability Density Function (PDF) and Cumulative Distribution Function (CDF) of the received SNRs of both macro and small cell users are derived and closed-form expressions of overall outage probability of the system are provided. Both analytical results and simulations show that the overall performance of the heterogeneous cellular networks is improved with interference cancellation.
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