A Statistical Model for VHF/UHF Radio Propagation over Irregular

• Main Authors: Hwang, Jsy-Sheng, 黃誌聲
• Other Authors: Jeen-Hwan Tang
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/20959885387575490682

碩士 === 國立交通大學 === 電信工程研究所 === 84 === In this research, firstly, a two-dimension ray-transmission- matrix (RTM) model,which combines a modified method of ray transmission matrix (RTM) and an equivalent terrain model, is verified by experimental data. It is proved that the RTM model works well for VHF/UHF radio propagation over both flat and irregular terrains. Secondly, an empirically based statistical model is developed to predict randomly received field strength. A lot of sampling data computed by using the RTM model is used to determine the parameters of the statistical model. The statistical model is proved to give a reasonable prediction accuracy by comparing the predicted field strength with the experimental data and extra sampling data computed by the RTM model separately.