Path Loss Performance Analysis of Low Power IEEE 802.11af Secondary TV White Space Devices Based on Field Measurements

International Journal of Electronics and Communication Engineering

© 2024 by SSRG - IJECE Journal

Volume 11 Issue 7

Year of Publication : 2024

Authors : Alberto S. Banacia, Rosana J. Ferolin

10.14445/23488549/IJECE-V11I7P108

How to Cite?

Alberto S. Banacia, Rosana J. Ferolin, "Path Loss Performance Analysis of Low Power IEEE 802.11af Secondary TV White Space Devices Based on Field Measurements," SSRG International Journal of Electronics and Communication Engineering, vol. 11,  no. 7, pp. 77-88, 2024. Crossref, https://doi.org/10.14445/23488549/IJECE-V11I7P108

Abstract:

The IEEE 802.11af standard is a wireless local area network that operates in the television white space, requiring it to avoid inducing damaging interference to licensed users such as incumbent digital and television services. To achieve this, precise tools for estimating path loss are essential to prevent both underestimation and overestimation, which could either limit the coverage of White Space Devices (WSDs) or fail to adequately shield primary or licensed users from unwanted emissions produced by secondary WSDs. This paper examines and compares the performance of various models for path loss, including Free Space Path Loss (FSPL), relevant portions of Recommendation ITU-R P.1411-11, and the linear and logarithmic regression models, against field measurement data to identify the most suitable path loss estimation model. The findings indicate that the logarithmic regression model exhibits the Root-Mean-Square Error (RMSE) that has the best performance, with a mean estimation error of 5 dB across all experimental locations where measurements were conducted. Additionally, the study suggests that the path loss model for free space can effectively provide a conservative path loss estimate for all sites, with an average overestimation of 18 dB, thereby ensuring adequate protection for primary users against potential interference from secondary users.

Keywords:

IEEE 802.11af, Path loss, TV white space.

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