scholarly journals Path loss models based on stochastic rays

2007 ◽  
Vol 1 (3) ◽  
pp. 602 ◽  
Author(s):  
L.Q. Hu ◽  
H. Yu ◽  
Y. Chen
Keyword(s):  
Path Loss ◽  
Loss Models

scholarly journals Bounding the Practical Error of Path Loss Models

2012 ◽  
Vol 2012 ◽  
pp. 1-21 ◽  
Author(s):  
Caleb Phillips ◽  
Douglas Sicker ◽  
Dirk Grunwald
Keyword(s):  
A Priori ◽  
Path Loss ◽  
Urban Environments ◽  
Production Networks ◽  
Modeling Error ◽  
Propagation Models ◽  
Performance Accuracy ◽  
Rural And Urban ◽  
Standard Models ◽  
Loss Models

We seek to provide practical lower bounds on the prediction accuracy of path loss models. We describe and implement 30 propagation models of varying popularity that have been proposed over the last 70 years. Our analysis is performed using a large corpus of measurements collected on production networks operating in the 2.4 GHz ISM, 5.8 GHz UNII, and 900 MHz ISM bands in a diverse set of rural and urban environments. We find that the landscape of path loss models is precarious: typical best-case performance accuracy of these models is on the order of 12–15 dB root mean square error (RMSE) and in practice it can be much worse. Models that can be tuned with measurements and explicit data fitting approaches enable a reduction in RMSE to 8-9 dB. These bounds on modeling error appear to be relatively constant, even in differing environments and at differing frequencies. Based on our findings, we recommend the use of a few well-accepted and well-performing standard models in scenarios wherea prioripredictions are needed and argue for the use of well-validated, measurement-driven methods whenever possible.

scholarly journals Performance Evaluation of LR-WPAN for different Path-Loss Models

2010 ◽  
Vol 7 (10) ◽  
pp. 22-28
Author(s):  
Neeraj Choudhary ◽  
Ajay K Sharma
Keyword(s):  
Performance Evaluation ◽  
Path Loss ◽  
Loss Models

Experimental ultra wideband path loss models for implant communications

2016 ◽  
Author(s):  
C. Garcia-Pardo ◽  
A. Fornes-Leal ◽  
N. Cardona ◽  
R. Chavez-Santiago ◽  
J. Bergsland ◽  
...  
Keyword(s):  
Path Loss ◽  
Ultra Wideband ◽  
Loss Models

Empirical Path-loss Models for Automated Warehouses

2021 ◽  
Author(s):  
Ognen Ognenoski ◽  
Di Kong ◽  
Boyan Ivanov ◽  
Yu An ◽  
Adam Green
Keyword(s):  
Path Loss ◽  
Automated Warehouses ◽  
Loss Models

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

2012 ◽  
Vol 3 (3) ◽  
pp. 18-37 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document