Title :
Mobile radio propagation path loss studies at VHF/UHF bands in Southern India
Author :
Rao, T. Rama ; Rao, S. Vijaya Bhaskara ; Prasad, M.V.S.N. ; Sain, Mangal ; Iqbal, A. ; Lakshmi, D.R.
Author_Institution :
Dept. of Phys., S.V. Univ., Tirupati, India
fDate :
6/1/2000 12:00:00 AM
Abstract :
Field strength measurements at 200, 400 and 450 MHz (VHF/UHF band) were conducted with the field strength meter placed on board a vehicle in Southern India. Observed field strength values were converted into path losses and are compared with different path loss prediction methods like Hata (1980), Egli (1957), Blomquist-Ladell (1974), COST 231 Walfisch-Ikegami (Doble 1996), Walfisch-Bertoni (1988) and ITU-R. These path loss studies are carried out in urban, suburban and open areas in this region. The results showed that Hata´s method gave better agreement with observed values in urban, suburban and open regions; the COST 231 Walfisch-Ikegami model is also in good agreement with the observed values in urban and suburban regions, the Egli and Blomquist-Ladell methods showed moderate agreement in open regions only. The agreement of the Walfisch-Bertoni and ITU-R methods with observed values is not good
Keywords :
UHF radio propagation; VHF radio propagation; land mobile radio; 200 MHz; 400 MHz; 450 MHz; Blomquist-Ladell method; COST 231 Walfisch-Ikegami model; Egli method; Hata method; ITU-R method; UHF; VHF; field strength measurements; mobile radio propagation path loss studies; open area; path loss prediction; path losses; suburban area; urban area; Costs; Frequency estimation; Land mobile radio; Mobile communication; Narrowband; Prediction methods; Predictive models; Propagation losses; UHF measurements; UHF propagation;
Journal_Title :
Broadcasting, IEEE Transactions on
