Propagation modelling and measurements in a populated indoor environment at 5.2 GHz
Paper
Paper/Presentation Title | Propagation modelling and measurements in a populated indoor environment at 5.2 GHz |
---|---|
Presentation Type | Paper |
Authors | Ziri-Castro, K. I. (Author), Evans, N. E. (Author) and Scanlon, W. G. (Author) |
Journal or Proceedings Title | Proceedings of the 1st IEEE International Conference on Wireless Broadband and Ultra Wideband Communications |
Number of Pages | 8 |
Year | 2006 |
ISBN | 0977520005 |
Web Address (URL) of Paper | http://auswireless.eng.uts.edu.au/index.htm |
Conference/Event | 1st IEEE International Conference on Wireless Broadband and Ultra Wideband Communications |
Event Details | 1st IEEE International Conference on Wireless Broadband and Ultra Wideband Communications Event Date 13 to end of 16 Mar 2006 Event Location Sydney, Australia |
Abstract | There are a number of significant radiowave propagation phenomena present in the populated indoor environment, including multipath fading and human body effects. The latter can be divided into shadowing and scattering caused by pedestrian movement, and antenna-body interaction with bodyworn or hand portable terminals [1]. Human occupants within indoor environments are not always stationary and their movement will lead to temporal channel variations that can strongly affect the quality of indoor wireless communication systems. Hence, populated environments remain a major challenge for wireless local area networks (WLAN) and other indoor communication systems. Therefore, it is important to develop an understanding of the potential and limitations of indoor radiowave propagation at key frequencies of interest, such as the 5.2 GHz band employed by commercial wireless LAN standards such as IEEE 802.11a and HiperLAN 2. Although several indoor wireless models have been proposed in the literature, these temporal variations have not yet been thoroughly investigated. Therefore, we have made an important contribution to the area by conducting a systematic study of the problem, including a propagation measurement campaign and statistical channel characterization of human body effects on line-of-sight indoor propagation at 5.2 GHz. Measurements were performed in the everyday environment of a 7.2 m wide University hallway to determine the statistical characteristics of the 5.2 GHz channel for a fixed, transverse line-of-sight (LOS) link perturbed by pedestrian movement. Data were acquired at hours of relatively high pedestrian activity, between 12.00 and 14.00. The location was chosen as a typical indoor wireless system environment that had sufficient channel variability to permit a valid statistical analysis. The paper compares the first and second order statistics of the empirical signals with the Gaussian-derived distributions commonly used in wireless communications. The analysis shows that, as the number of pedestrians within the measurement location increases, the Ricean K-factor that best fits the Cumulative Distribution Function (CDF) of the empirical data tends to decrease proportionally, ranging from K=7 with 1 pedestrian to K=0 with 4 pedestrians. These results are consistent with previous results obtained for controlled measurement scenarios using a fixed link at 5.2 GHz in [2], where the K factor reduced as the number of pedestrians within a controlled measurement area increased. Level crossing rate results were Rice distributed, considering a maximum Doppler frequency of 8.67 Hz. While average fade duration results were significantly higher than theoretically computed Rice and Rayleigh, due to the fades caused by pedestrians. A novel statistical model that accurately describes the 5.2 GHz channel in the considered indoor environment is proposed. For the first time, the received envelope CDF is explicitly described in terms of a quantitative measurement of pedestrian traffic within the indoor environment. The model provides an insight into the prediction of human body shadowing effects for indoor channels at 5.2 GHz. |
ANZSRC Field of Research 2020 | 400699. Communications engineering not elsewhere classified |
Public Notes | Deposited in accordance with the copyright policy of the publisher. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Copyright 2006 IEEE. Personal use of this material is permitted. This material is posted here with permission of the IEEE. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. |
Byline Affiliations | Department of Mathematics and Computing |
University of Ulster, United Kingdom | |
Queen's University Belfast, United Kingdom |
https://research.usq.edu.au/item/9y228/propagation-modelling-and-measurements-in-a-populated-indoor-environment-at-5-2-ghz
Download files
2241
total views845
total downloads0
views this month0
downloads this month