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In this paper, we present a new and intuitive way to show important green techniques for the future fifth generation of mobile networks such as adaptive beamforming to the general public. We use a new device called the Radio Waves Display, which is a one meter square panel composed of twenty by twenty radio frequency sensors spaced by five cm. The Electromagnetic Field strength measured by each sensor...
In this paper, a prototype of a dual-polarized array antenna is presented. This array was designed in the framework of a collaborative project on spatial modulation schemes. It will be used for the project testbed and for space-time channel measurements. This array features several novelties, including a slant uniform planar structure, a scalable design with integrated switching circuitry, a reference...
This paper presents an experimental study of the propagation channel in Indoor environment with two radio link configurations: outdoor to indoor (O2I) and indoor to indoor (I2I). The experimentation has been carried out with a MIMO set-up which allows a full 3D space-time characterization of the channel. The analysis of the measurement is based on the Power Delay Profile (PDP) and on the Directions...
The channel capacity of a MIMO telecommunication system depends on different parameters such as the signal-to-noise ratio, the space-time characteristics of the propagation channel, the antenna array geometry and the antenna pattern. However, the propagation channel remains the strongest constraint imposed on designers of new radio air interfaces. Using a MIMO channel model, computer simulations are...
Characterization of the propagation channel is the first step toward the development of accurate MIMO channel models. Unfortunately, comprehensive characterization of the UWB propagation channel requires a complex measurement setup. Usually, simpler configurations are used for space-time characterization which leads to biased statistical results. This paper presents a simple configuration which enables...
The experiment described in the following paper was performed to investigate RF propagation through different common building materials over a wide band of frequencies. The characterization is based on transmission power measurement. Results for the complex dielectric constant of each material over a frequency range of 2 to 16 GHz are presented. An internal multireflection model is used to compare...
The engineering optimisation of wireless system, such as WIFI, WIMAX, and UWB that work at many different frequencies is based on propagation modelling. So, the purpose of this paper was to model the electromagnetic properties of various building materials over a large frequency range. A measurement campaign was done at different frequencies, incidence angles and polarization in an anechoic chamber...
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