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There has been an increasing interest in the millimeter wave (mmW) frequency regime in the design of the next-generation wireless systems. The focus of this paper is on understanding mmW channel properties that have an important bearing on the feasibility of mmW systems in practice and have a significant impact on physical layer design. In this direction, simultaneous channel sounding measurements...
The past couple of years have seen an explosion in mobile data traffic as a result of the growth of mobile devices such as smartphones, tablets, and those that are capable of monitoring, record, provide, and transfer Zetta Bytes of data on a yearly basis. As a solution, researchers focus toward the frequency band above 6 GHz bands to propose a new band that can offer larger bandwidth. However, to...
The Unmanned Aerial Vehicle (UAV) is going to play an important role in fifth generation communication systems for establishing seamless coverage in various scenarios due to its low-cost and flexibility. Understanding the UAV wireless channels is the basis for its application. In this paper, a recently conducted measurement campaign for the UAV wireless propagation channel in a suburban scenario in...
This paper presents the measured radio propagation characteristics in outdoor environments for new mobile wireless system in the Jeju island at 781 MHz frequency. The propagation characteristics at 781MHz seem to be similar at 900MHz, but detailed characteristics can't be predicted without research for wireless communication system at the 781 MHz frequency. Also, there are few studies on process of...
Multiple-input multiple-output (MIMO) systems at the UHF bands is interest for wireless communication applications. When designing and evaluating such systems, knowledge of realistic propagation conditions is required. In this paper, the development of wideband MIMO channel sounder and a pilot measurement result is described for research on the multi antenna radio propagation characteristics considering...
In this paper, the results of outdoor-to-indoor multiple-input multiple-output (MIMO) channel measurements at 780 MHz are presented. The motivation for these measurements was to provide actual measurement data needed to extend the International Mobile Telecommunications -Advanced (IMT-A) channel models to the frequencies around 400 - 900 MHz. There are publications reporting measurement results for...
In this paper, the results of wideband multiple-input multiple-output (MIMO) measurements around 800 MHz in urban macro (UMa) and outdoor to indoor (O2I) scenarios are presented. The motivation for conducting the measurements was to extend the frequency range of the International Mobile Telecommunications-Advanced (IMT-A) channel model down to 700-800 MHz. The measurement campaigns on the lower frequency...
The next generation mobile communication systems tend to wideband. We present the experimental results based on the polarimetric MIMO (Multiple Input Multiple Output) channel measurement campaign at 2.53 GHz with a bandwidth of 100 MHz, performed in Shanghai. Our special interest focuses on the propagation characteristics and channel parameters in terms of path loss, channel impulse response (CIR)...
Propagation measurement campaign at 60 GHz band has been conducted in the laboratory environment for both LOS and NLOS situations. Path loss and delay spread were described as basic propagation characteristics. The parameter of path loss model with shadowing effect was also extracted. The result showed a large delay spread in the specific condition.
This paper presents results of UWB (ultra wideband) channels characterization in outdoor environments that are useful for future developing of sensoring equipments and for emergency communications. The frequency sounding technique was used in a 750 MHz band. Ten measurement campaigns were carried out on the Federal Fluminense University Campi, placed at Niteroi city, Rio de Janeiro state, Brazil,...
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