摘要
抛物型方程(PE)是目前预测复杂环境下电波传播特性的主要方法。首先对抛物型方程推导过程中伪微分算子Q的五种近似处理产生的误差进行详细分析与仿真。结果表明,Q采用Pade-(1,1)近似和Feit-fleck近似相对误差较小,处理效果更理想。然后计算自由空间中电磁波的传播衰减,其结果与经典理论计算值相吻合,验证了宽角PE算法的精度和可靠性。
Parabolic Equation(PE) is the main method to solve the radio propagation under complex environment. The five rel- ative errors which are engendered by dealing with pseudo-differential operator Q in course of parabolic equation deduction are ana- lyzed in detail. The result shows that Pade-( 1, 1 ) and Feit-Fleck approximate estimation methods are more ideal. Then the loss of radio propagation is evaluated by the 3D PE method. The evaluation result is consistent with the result of the classical method, which verifies the precision and reliability of 3D PE method.
出处
《遥测遥控》
2015年第2期21-25,共5页
Journal of Telemetry,Tracking and Command
基金
国家安全重大基础研究项目(973项目):No.613138
No:613165
国家重大科技专项:No.2012ZX03006003-004
国家自然科学基金(61372029)
关键词
抛物型方程
伪微分算子
误差分析
电波传播
Parabolic equation
Pseudo-differential operator
Error analysis
Radio propagation