Table of Contents
International Journal of Microwave Science and Technology
Volume 2011, Article ID 714927, 6 pages
Research Article

Microwave Attenuation and Prediction of Rain Outage for Wireless Networks in Pakistan's Tropical Region

Department of Electrical & Electronic Engineering, University of Engineering & Technology, Taxila 47050, Pakistan

Received 2 September 2010; Revised 16 December 2010; Accepted 11 January 2011

Academic Editor: Beatriz Ortega

Copyright © 2011 Uzma Siddique et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The microwave attenuation due to rainfall in tropical regions has not been very widely studied yet. In Pakistan's tropical environment, line-of-sight microwave communication links were set up and have been operated for several years to study the microwave attenuation characteristics due to tropical rainfall. In this paper the experimental results are presented, including the cumulative distributions of microwave attenuation and the relationship between specific attenuation and rainfall rate. In addition, a rain outage prediction model is proposed which not only predicts microwave radio link performance but will also be useful in calculating the link degradations due to interference issues. The main focus of this research work has been done keeping in mind the wireless networks of Pakistan. The results show that the rainfall rate, the microwave propagation characteristics, and outage predictions in Pakistan differ from the International Radio Consultative Committee predictions and ITU recommendation P530.7/8, respectively.