| Autors: Ivanov, A. S., Tonchev, K., Koleva, P. H., Poulkov, V. K. Title: Influence of Density on Throughput Performance in Cognitive Ultra-dense Networks Keywords: 5G; Cognitive radio; Densification; Energy detection; Networ Abstract: Current advancements of Fifth Generation (5G) of mobile communications and beyond, have envisioned future networks as highly dense and coexisting in various bandwidths, providing seamless connectivity to users at any location. Thus, it is important to describe the effects and limits of densification and spectrum sharing. This article examines a less explored system model of a terrestrial cognitive radio (CR) based ultra-dense network (UDN) that operates within the range of a cellular macro base station (BS) and its users. It shares the incumbent spectrum in the interweave mode to avoid interference to the primary network, by implementing two common methods for energy detection (ED) spectrum sharing Gaussian ED and Fading ED (FED). Through extensive simulations, the critical density of the UDN s cognitive access points (CAPs), the ED efficiency, as well as the throughput gains, are determined through the measured signal-To-noise-ratio (SNR) at the CAPs and SUs. References Issue
Copyright River Publishers |
Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus
