Performance analysis of self-organizing heterogeneous network with interference cancellation

This paper investigates the downlink performance of a self-organizing heterogeneous network (HetNet), where small cells are allowed to adjust their system parameters and provide for the handover of users from the macro cell. An interference cancellation scheme employed at macro base station is first discussed based on the cancellation of cross-tier interference from macro base station to small cell users. Then, we derive the expressions of the probability density function (PDF) and cumulative distribution function (CDF) of the received SNRs of both macro and small cell users, and provide the closedform expressions of average bit error rate (BER) and overall outage probability of the system, which shows that the overall performance of the HetNet network is improved with interference cancellation. The numerical results finally verify the accuracy of our analysis.