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In this paper, we study the radio propagation characteristics in a typical forest environment in central Europe. Understanding propagation in such environment is important not just for remote monitoring and military applications, but also for vehicular networks of cars passing by the forest. We have conducted measurement campaigns covering the frequencies of 750MHz and 2170 MHz. We have also covered...
We present initial results from our ongoing on radio's spectrum measurement campaign on characterizing radio noise levels. The measurements are done at a number of diverse locations in order to study in detail the power and other characteristics of the man-made noise. We observe a significantly increased occurrence of noise compared to levels reported in the earlier literature. In some areas can even...
We report results from extensive measurements based study to understand the shadow fading correlations. We have particularly studied and analyzed common assumptions done in literature for shadow fading, which is typically modeled as a spatially correlated Gaussian random process in the logarithmic scale. We show that these assumptions, starting from the Gaussianity of the radio propagation environment,...
In this paper we describe the effects of the radio propagation model on the spatial characteristics of the radio environment. For this study we have conducted a dedicated propagation measurement campaign focusing on the three different frequency bands of 485MHz, 1700 MHz and 2600MHz in order to capture the impact of the used frequency on the radio propagation. The presented results are coming from...
Harm claim threshold policies will offer more flexibility in radio regulations. By defining bounds on the acceptable field strength over time and space, these policies will introduce quantitative measures to inter-system coexistence questions. How-ever, this requires tangible and sufficient means of proving claims of interference through spectrum measurements. In this paper we study drive test requirements...
Despite the remarkable progress in radio access technology to support the rapidly increasing wireless data demand, coverage analysis remains as one of the indispensable topics on which mobile operators still need innovations, above all, in terms of operational efficiency together with performance. Manual coverage detection and prediction is an inefficient and costly task. In this paper we show how...
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 this paper we study the problem of characterizing transmitter locations based on signal strength measurements. Instead of attempting localization of individual transmitters, we adopt a model-based approach, attempting to infer either a model or selected key statistics describing how transmitters are distributed over the region of interest. We show that such estimates can be made with much smaller...
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