Analysis of Interference Correlation in Non-Poisson Networks

Original · EN

The correlation of interference has been well quantified in Poisson networks where the interferers are independent of each other. However, there exists dependence among the base stations (BSs) in wireless networks. In view of this, we quantify the interference correlation in non-Poisson networks where the interferers are distributed as a Matern cluster process (MCP) and a second-order cluster process (SOCP). Interestingly, it is found that the correlation coefficient of interference for the Matern cluster networks, ζMCP, is equal to that for second-order cluster networks, ζSOCP. Furthermore, they are greater than their counterpart for the Poisson networks. This shows that clustering in interferers enhances the interference correlation. In addition, we show that the correlation coefficients ζMCP and ζSOCP increase as the average number of points in each cluster, c, grows, but decrease with the increase in the cluster radius, R. More importantly, we point that the effects of clustering on interference correlation can be neglected as cπ²R²→0. Finally, the analytical results are validated by simulations.