DTMB单频网规划中电波传播模型的选取与校正

摘要

The method of selection and calibration of radio propagation model in single frequency network( SFN) planning based on DTMB is introduced in the paper. The measured data are acquired and processed based on continuous wave test theory. The received power under different wave propagation models is predicted based on ICS telecom simulation. A model suitable for the planning region is selected to have the minimum mean square error between measured data and predicted data. The model is calibrated with the least-square method under two different propagation environments of urban and suburb. The mean square error of path loss prediction is much improved after calibration, which can improve scientificity, accuracy and reliability for planning.%研究了某地区DTMB单频网规划中电波传播模型的选取和校正方法,基于连续波测试理论采集和处理实测数据,基于ICS telecom仿真对不同电波传播模型下的接收功率进行预测,以预测值和实测值之间的均方误差最小为准则选取了一种适合该规划地区的电波传播模型,并采用最小二乘法对该模型进行校正,得到两种不同传播环境下(市区、郊区)的电波传播模型.与原模型相比,校正后模型对链路损耗预测的均方误差有较大程度改善,这对提高该规划地区单频网规划的科学性、准确性和可靠性有重要的作用.