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In this paper we present our results from our ongoing measurement campaign, which is targeting to provide information on the current radio noise levels. Our focus is to understand if the increasing number of users and devices with inbuilt transceivers has increased the noise levels considerably. In the literature it is almost universally assumed that the radio noise is a white Gaussian stochastic...
We study the propagation dynamics of a typical European forest by calculating and modeling shadowing fading correlations. This work relies on highly accurate propagation measurements that are able to capture the dynamics of such environment in detail. We also describe how such propagation measurements should be conducted to provide reliable results. These types of measurements are important for military,...
We study the statistical characteristics of radio environment noise, in particular focusing on spurious received power arising from adjacent channel interference, harmonics and wideband man-made interference. Unlike the majority of existing studies, our measurements enable a comprehensive study on frequencies ranging from 80MHz to 2.64 GHz instead of being focused on the properties of an application-specific...
In the recent years there has been an effort for the wireless systems to become more efficient in terms of power consumption and coverage planning. One aspect of this effort was the proposal of using spatial estimation approaches, that exploit the spatial correlation of the shadowing and received power, to improve propagation prediction. In this demonstration, we present a software tool that implements...
In this paper we present results on the time dynamics of the most used cellular bands, from the measurement campaign conducted in seven European cities. Special attention was given on acquiring comparable datasets between the different measurement locations. We provide detailed examples of how much variability there is in the measured activity and we also test the validity of common assumptions usually...
We present the results of an extensive, high spatial density measurement campaign made for investigating the shadowing correlations on two different frequency bands, namely 485MHz and 2600MHz in an urban propagation environment. In particular, we report results using different analysis procedures and tools. Our results show that the signal detector has only a small impact on the extracted data, given...
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...
We present results from the comparison of measurements between dedicated embedded spectrum sensing chip targeting low-cost and low-power applications and a high-end spectrum analyzer. We use different signal types, including actual spectrum usage measured simultaneously with the two devices. We analyze the typical problems such devices suffer from. Finally we also study how to estimate the spectrum...
We report initial results from 48 hour spectrum occupancy measurement campaign that was done in time-correlated fashion in seven different European locations. We give a description of the measurement campaign and provide results from our preliminary analysis of overall duty cycle in the frequency range 110–3000 MHz. The paper particularly focuses on traffic and duty cycle patterns in GSM 900 and GSM...
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...
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