Abstract
Our society has become fully submersed in fourth generation (4G) technologies, setting constant connectivity as the norm. Together with self-driving cars, augmented reality, and upcoming technologies, the new generation of Internet of Things (IoT) devices is pushing the development of fifth generation (5G) communication systems. In 5G architecture, increased capacity, improved data rate, and decreased latency are the objectives. In this paper, a measurement campaign is proposed; we focused on studying the propagation properties of microwaves at a center frequency of 3.5 GHz, commonly used in 5G cellular networks. Wideband measurement data were gathered at various indoor environments with different dimensions and characteristics. A ray-tracing analysis showed that the power spectrum is dominated by the line of sight component together with reflections on two sidewalls, indicating the practical applicability of our results. Two wideband parameters, root mean square delay spread and coherence bandwidth, were estimated for the considered scenarios, and we found that they are highly dependent on the physical dimension of the environment rather than on furniture present in the room. The relationship between both parameters was also investigated to provide support to network planners when obtaining the bandwidth from the delay spread, easily computed by a ray-tracing tool.
Highlights
Wireless communication systems have become one of the most interesting areas in the field of telecommunications and networking
The provided insight could be useful for complementing the scientific knowledge in the field, and for extending and generalizing the conclusions. Completing this previous research, this paper describes a measurement campaign and discusses different insights, including useful conclusions on the relationship between the most important wideband parameters: root mean square (RMS) delay spread in the time domain and coherence bandwidth in the frequency domain
Several kinds of results are provided in this paper: those directly from measurements, those from ray-tracing simulations, and the relation between wideband parameters, which represents the main contribution of this work
Summary
Wireless communication systems have become one of the most interesting areas in the field of telecommunications and networking. They support networks, having a large impact on the daily lives of billions of people. In the last few decades, wireless communication has revolutionized the way in which people work and communicate, and even how they form social relationships with each other. The speed of wireless data transfers is always being pushed beyond its limits. A good knowledge of the different band parameters regarding frequency selectivity and the time dispersion is necessary to avoid this problem. With this aim, this paper contains the results of a measurement campaign investigating different wideband characteristics
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