Spatial Spectrum Sharing for Heterogeneous SIMO Networks

In wireless networks for spectrum sharing among heterogeneous nodes, an issue of significant interest is the interference among coexisting systems, and understanding the essential quantities, such as interference distribution, is fundamental to the design of spatial spectrum sharing methods. This paper analyzes the performance of heterogeneously characterized nodes and investigates efficient spectrum sharing methods for single-input-multiple-output (SIMO) networks where nodes with different capabilities and requirements are spatially distributed according to homogeneous Poisson point processes (PPPs). Transmit power control strategies, such as fixed transmit power control and distance-based transmit power control, are applied, and it is demonstrated that their effects on the system performances depend on the multiple-antenna receiving methods. Furthermore, the underlay and overlay methods are considered for use as spectrum sharing methods. In addition, it is demonstrated that careful resource balancing among heterogeneous nodes contributes to minimizing the total amount of wireless resources required to meet the target outage constraints for all nodes, and the two spectrum sharing methods have the same performance in heterogeneous SIMO networks with low node densities.