Measurements and Ray Tracing Simulations for Non-Line-of-Sight Millimeter-Wave Channels in a Confined Corridor Environment

Multipath propagation is one of the major sources of error in GPS measurements. In this research, a ray-tracing technique is proposed to study the frequency domain characteristics of multipath propagation. The Doppler frequency difference, also known as multipath phase rate and fading frequency, between direct (line-of-sight, LOS) and reflected (non-line-of-sight, NLOS) signals is studied as a function of satellite elevation and azimuth, as well as distance between the reflector and the static receiver. The accuracy of the method is verified with measured Doppler differences from real data collected in a downtown environment. The use of ray-tracing derived predicted Doppler differences in a receiver, as a means of alleviating the multipath induced errors in the measurement, is presented and discussed.

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Characterizing the First-Arriving Multipath Component in 5G Millimeter Wave Networks: TOA, AOA, and Non-Line-of-Sight Bias

IEEE Transactions on Wireless Communications ◽

10.1109/twc.2021.3105641 ◽

2021 ◽

pp. 1-1

Author(s):

Christopher E. OrLone ◽

Harpreet S. Dhillon ◽

R. Michael Buehrer

Keyword(s):

Millimeter Wave ◽

Line Of Sight ◽

Non Line Of Sight

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Improving Accuracy of Ray-Tracing Prediction in Non Line-of-Sight (NLOS) Urban Street Cell Environment beyond 6GHz

IEICE Transactions on Communications ◽

10.1587/transcom.2016ebp3144 ◽

2017 ◽

Vol E100.B (4) ◽

pp. 566-574

Author(s):

Nobutaka OMAKI ◽

Tetsuro IMAI ◽

Koshiro KITAO ◽

Yukihiko OKUMURA

Keyword(s):

Ray Tracing ◽

Line Of Sight ◽

Urban Street ◽

Improving Accuracy ◽

Non Line Of Sight

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Non-Line-Of-Sight Imaging by Millimeter Wave Radar

10.1109/igarss47720.2021.9553059 ◽

2021 ◽

Author(s):

Jinshan Wei ◽

Shunjun Wei ◽

Xinyuan Liu ◽

Mou Wang ◽

Jun Shi ◽

...

Keyword(s):

Millimeter Wave ◽

Line Of Sight ◽

Millimeter Wave Radar ◽

Wave Radar ◽

Non Line Of Sight

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An analytical model for millimeter wave outdoor directional non-line-of-sight channels

2017 IEEE International Conference on Communications (ICC) ◽

10.1109/icc.2017.7996790 ◽

2017 ◽

Cited By ~ 2

Author(s):

R. T. Rakesh ◽

Goutam Das ◽

Debarati Sen

Keyword(s):

Analytical Model ◽

Millimeter Wave ◽

Line Of Sight ◽

Non Line Of Sight

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Site Prediction Model for the over Rooftop Path in a Suburban Environment at Millimeter Wave

International Journal of Antennas and Propagation ◽

10.1155/2019/1371498 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12 ◽

Cited By ~ 1

Author(s):

Young Keun Yoon ◽

Kyung Won Kim ◽

Young Jun Chong

Keyword(s):

Millimeter Wave ◽

Open Space ◽

Small Town ◽

Geometrical Optic ◽

Propagation Model ◽

Line Of Sight ◽

Wave Band ◽

The Difference ◽

Non Line Of Sight ◽

Suburban Environment

This paper proposes the site-specific pathloss model for a small town in a suburban environment at millimeter wave. Also, the site general characteristics are provided in the entire measurement area of the small town. The proposed pathloss model is based on the moving measurement campaign according to the distance between a transmitter and a receiver in the candidate millimeter wave band or future five-generation service. In addition, the probability characteristics of pathloss such as the cumulative density function are shown to estimate the spreading characteristics of the wideband signal with a five-hundred-MHz bandwidth. Measurement was performed for the small town in a suburban covered with low-rise commercial restaurants or houses. Transmitting signals propagate through the over rooftop of low-rise houses of average ten meters height. Their multipath signals may be arrived at a receiving station located at the below roof of the house by reflection, diffraction, and scattered mechanism. A current propagation model for the over rooftop is based on generic or geometrical optic equations in a fully non-line-of-sight environment. But, non-line-of-sight cases in a realistic suburban environment include partly the open space between houses. Therefore, the definition of the propagation model of this sight-specific case is very important so clearly as to show the difference for the over rooftop according to the different displacements of houses in a non-line-of-sight environment. Finally, we suggest the improved propagation model of pathloss that can reflect various environments in a small town.

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