Benchmark of radio propagation path loss models applied to line-of-trees at 10, 36 and 60 GHz

<span>The 60 GHz band has been selected for short-range communication systems to meet consumers’ needs for high data rates. However, this frequency is attenuated by obstacles. This study addresses the limitations of the 60 GHz band by modifying indoor environments with ring Frequency Selective Surfaces (FSSs) wallpaper, thereby increasing its utilization. The ring FSS wallpaper response at a 61.5 GHz frequency has been analyzed using both MATLAB and Computer Simulation Technology (CST) Microwave Studio (MWS) software. ‘Wireless InSite’ is also used to demonstrate enhanced wave propagation in a building modified with ring FSSs wallpaper. The demonstration is applied to Single Input Single Output (SISO) and Multiple Input Multiple Output (MIMO) systems to verify the effectiveness of FSSs on such systems’ capacity. The effectiveness of the suggested modification over delay spread has been studied for the MIMO scenario, as well as the effect of the human body on capacity. Simulation results presented here show that modifying a building using ring FSS wallpaper is an attractive scheme for significantly improving the indoor 60 GHz wireless communications band. This paper also presents and compares two large-scale indoor propagation Path Loss Models (PLMs), the Close-In (CI) free space reference distance model and the Floating Intercept (FI) model. Data obtained from ‘Wireless InSite’ over distances ranging from 4 to 14.31 m is analyzed. Results show that the CI model provides good estimation and exhibits stable behavior over frequencies and distances, with a solid physical basis and less computational complexity when compared to the FI model. </span>

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Radio Propagation and Propagation Path-Loss Models

Wireless Communications & Networking ◽

10.1016/b978-012373580-5/50037-5 ◽

2007 ◽

pp. 47-84 ◽

Cited By ~ 4

Author(s):

Vijay K. Garg

Keyword(s):

Path Loss ◽

Radio Propagation ◽

Propagation Path ◽

Loss Models

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Propagation Path Loss Modeling and Outdoor Coverage Measurements Review in Millimeter Wave Bands for 5G Cellular Communications

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v8i4.pp2254-2260 ◽

2018 ◽

Vol 8 (4) ◽

pp. 2254 ◽

Cited By ~ 1

Author(s):

Mohammed B. Majed ◽

Tharek A. Rahman ◽

Omar Abdul Aziz

Keyword(s):

Communication Networks ◽

Millimeter Wave ◽

Wide Spectrum ◽

Path Loss ◽

Separation Distance ◽

Propagation Path ◽

Delay Spread ◽

Propagation Time ◽

60 Ghz ◽

Rms Delay Spread

The global bandwidth inadequacy facing wireless carriers has motivated the exploration of the underutilized millimeter wave (mm-wave) frequency spectrum for future broadband cellular communication networks, and mmWave band is one of the promising candidates due to wide spectrum. This paper presents propagation path loss and outdoor coverage and link budget measurements for frequencies above 6 GHz (mm-wave bands) using directional horn antennas at the transmitter and omnidirectional antennas at the receiver. This work presents measurements showing the propagation time delay spread and path loss as a function of separation distance for different frequencies and antenna pointing angles for many types of real-world environments. The data presented here show that at 28 GHz, 38 GHz and 60 GHz, unobstructed Line of Site (LOS) channels obey free space propagation path loss while non-LOS (NLOS) channels have large multipath delay spreads and can utilize many different pointing angles to provide propagation links. At 60 GHz, there is more path loss and smaller delay spreads. Power delay profiles PDPs were measured at every individual pointing angle for each TX and RX location, and integrating each of the PDPs to obtain received power as a function of pointing angle. The result shows that the mean RMS delay spread varies between 7.2 ns and 74.4 ns for 60 GHz and 28 GHz respectively in NLOS scenario.

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Challenges in Channel Measurement and Modeling for RF Localization Inside the Human Body

International Journal of Embedded and Real-Time Communication Systems ◽

10.4018/jertcs.2012070102 ◽

2012 ◽

Vol 3 (3) ◽

pp. 18-37 ◽

Cited By ~ 11

Author(s):

Kaveh Pahlavan ◽

Yunxing Ye ◽

Ruijun Fu ◽

Umair Khan

Keyword(s):

Human Body ◽

Path Loss ◽

Signal Strength ◽

Radio Propagation ◽

Time Of Arrival ◽

Precise Localization ◽

Channel Measurement ◽

Modeling Techniques ◽

Endoscopy Capsule ◽

Loss Models

In this invited paper, the authors introduce an overview of the fundamentals of radio frequency (RF) channel measurement and modeling techniques needed for localization inside the human body. To address these fundamentals, the authors use capsule endoscopy as an example application. The authors first provide the results of the Cramer Rao Lower Bound (CRLB) for received signal strength (RSS) based endoscopy capsule localization, inside the human body, using existing path-loss models for radio propagation. Then challenges demanding further research are highlighted for attaining more precise localization using the time-of-arrival (TOA) based ranging techniques.

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