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10 - Temporal Variance: Literature Review on Human Blockage Models

Published online by Cambridge University Press:  18 August 2022

Edited by
Theodore S. Rappaport ,
Kate A. Remley ,
Camillo Gentile ,
Andreas F. Molisch  and
Alenka Zajić
Theodore S. Rappaport
Affiliation:
New York University
Kate A. Remley
Affiliation:
National Institute of Standards and Technology, Maryland
Camillo Gentile
Affiliation:
National Institute of Standards and Technology, Maryland
Andreas F. Molisch
Affiliation:
University of Southern California
Alenka Zajić
Affiliation:
Georgia Institute of Technology
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Summary

Human blockage causes temporal variations to radio channels when a mobile device is in motion and some plane waves constituting the radio channels are blocked by a human body. Even when two sides of communications are static, moving human bodies often shadow some plane waves, leading to time-varying radio channel responses. Shadowing of plane waves due to human bodies makes the shapes of the Doppler spectrum significantly different for the stationary and mobile links. The main task of modeling human blockages is therefore to choose reasonable properties of the blocking objects. This chapter covers human blockage models with different shapes and material properties of the blocking objects, with mathematical representations to estimate the shadowing losses in addition to free-space losses of a plane wave.

Keywords

Absorbing screendouble knife-edge diffraction (DKED)triple knife-edge diffraction (TKED)multiple knife-edge diffraction (MKED)conducting screenwedgecylinderelliptic cylinder
Type
Chapter
Information
Radio Propagation Measurements and Channel Modeling: Best Practices for Millimeter-Wave and Sub-Terahertz Frequencies , pp. 218 - 231
Publisher: Cambridge University Press
Print publication year: 2022

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