Measurements of spectrum use in London: Exploratory data analysis and study of temporal, spatial and frequency-domain dynamics

In this paper we present results from a week long measurement campaign on spectrum use in London (UK). The measurements were conducted in order to understand the characteristics and especially the variability in spectrum use over different types of areas in a major metropolitan area. Three spectrum analyzers were used in the measurement campaign, one used for long-term measurements at a single location in a given area, with the other two used to sample spectrum use around the stationary measurement point. This measurement approach yields much more detailed information about spectrum use than the typical single-location campaigns reported in the literature. We give a detailed description of the measurement campaign, including the equipment setup and rationale for the choice of areas in which the measurements were conducted. We also present results from the first exploratory data analysis of the obtained data, and study in detail the correlation structures and dynamics in spectrum use in temporal, spatial and frequency domains.