Abstract
This paper presents millimeter wave (mmWave) measurements in an indoor environment. The high demands for the future applications in the 5G system require more capacity. In the microwave band below 6 GHz, most of the available bands are occupied; hence, the microwave band above 6 GHz and mmWave band can be used for the 5G system to cover the bandwidth required for all 5G applications. In this paper, the propagation characteristics at three different bands above 6 GHz (19, 28, and 38 GHz) are investigated in an indoor corridor environment for line of sight (LOS) and non-LOS (NLOS) scenarios. Five different path loss models are studied for this environment, namely, close-in (CI) free space path loss, floating-intercept (FI), frequency attenuation (FA) path loss, alpha-beta-gamma (ABG), and close-in free space reference distance with frequency weighting (CIF) models. Important statistical properties, such as power delay profile (PDP), root mean square (RMS) delay spread, and azimuth angle spread, are obtained and compared for different bands. The results for the path loss model found that the path loss exponent (PLE) and line slope values for all models are less than the free space path loss exponent of 2. The RMS delay spread for all bands is low for the LOS scenario, and only the directed path is contributed in some spatial locations. For the NLOS scenario, the angle of arrival (AOA) is extensively investigated, and the results indicated that the channel propagation for 5G using high directional antenna should be used in the beamforming technique to receive the signal and collect all multipath components from different angles in a particular mobile location.
Highlights
The ever-growing data rate demand as well as the shortage of current frequency resources are the main challenges for the upcoming fifth generation (5G) of mobile communications [1,2,3,4]
This paper presented the channel propagation characteristics for three different frequency bands: 19 GHz, 28 GHz, and 38 GHz
These values are lower than the free space path loss exponent of 2 because of the wave-guiding effect from both wall sides of the corridor
Summary
The ever-growing data rate demand as well as the shortage of current frequency resources are the main challenges for the upcoming fifth generation (5G) of mobile communications [1,2,3,4]. In [11], the propagation characteristics of mmWaves were investigated in an indoor corridor environment for the line of sight (LOS) scenario at 6.5, 10.5, 15, 19, 28, and 38 GHz bands. The focus of ongoing research related to mmWave communications is the study of propagation characteristics, channel modeling, beamforming, and medium access control design. Characterization of an extensive indoor propagation channel is performed for three different mmWave bands above 6 GHz. The channel characteristics are investigated based on five path loss models. The power, time, and angle dispersion are analyzed for line of sight (LOS) and non-LOS (NLOS) scenarios These parameters are studied based on the root mean square delay and angle spread, excess delay, and angle of arrival (AOA).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
