Authors: S.O. Ajose; A.L. Imoize
Addresses: Department of Electrical and Electronics Engineering, University of Lagos, Akoka-Lagos, Nigeria ' Department of Electrical and Electronics Engineering, University of Lagos, Akoka-Lagos, Nigeria
Abstract: Path loss of measured data from GSM base stations located in Lagos has been compared against predictions made by free space model, Egli model, COST 231-Hata model, COST 231 Walfisch-Ikegami model, Ericsson model, ECC-33 model and the SUI model. The SUI model performed better in the rural area with a Root-Mean-Square Error (RMSE) of 2.76 dB. The Egli, Ericsson, ECC-33 and the COST 231 Walfisch-Ikegami models predict the path loss in the areas with RMSEs higher than the acceptable range of 6 dB. The COST 231 Hata model showed the best performance in the rural, suburban and urban areas with RMSEs of 6.91 dB, 4.80 dB and 4.59 dB, respectively. This model was modified and found to predict the measured path loss in the rural, suburban and urban areas with RMSEs of 2.50 dB, 3.64 dB and 5.06 dB, respectively, which are acceptable for signal prediction.
Keywords: received power; path loss; propagation measurements; root mean square error; COST 231 Hata model; modelling; 1800 MHz; wireless networks; mobile computing; GSM base stations; Nigeria; rural areas; suburban areas; urban areas; signal prediction.
International Journal of Wireless and Mobile Computing, 2013 Vol.6 No.2, pp.165 - 174
Received: 07 Jul 2012
Accepted: 03 Oct 2012
Published online: 15 May 2013 *