超短波通信系统的物理层仿真精确建模方法研究

Research on Exact Simulation Modeling Approach for Physical Layer of Ultra-Short Communication System

在通信系统仿真设计中,物理层建模通常使用经验模型公式,无法精确地刻画仿真场景及配置的实际情况。为了提高仿真模型的有效性,针对超短波通信系统的特点以及物理层信道模型和地形因素对超短波通信的影响,本文设计了一种结合OMNET++通信模型、Simulink信道模型和WI模型的超短波通信仿真系统,通过与物理层经验模型公式进行对比实验,验证了物理层的建模精度对性能结果具有较大影响,并对性能结果影响因素进行了分析。

In the design of simulation model for communication system, the empirical formulation is usually introduced to build up the physical layer model. However, generally such empirical formulation method suffers from two drawbacks： it fails to represent the practical scene configuration, and it cannot guarantee the modeling accuracy. In the aim of improving the effectiveness of the simulation model, the modeling accuracy of the physical layer should be further enhanced. In this paper, we build a new simulation model for the uhra-short communication system and implement a simulation system by using OMNET＋＋ based on its Simulink channel model and WI model. Experimental results confirm the accuracy of the built model compared with the empirical formulation modeling method for the physical layer. Finally, we analyze the factors affecting the performance result.