Design And Research On VHF Communication Simulation System Based On HLA

Computer simulation has been widely applied to various fields such as military, communication, aircraft and sociology,which provides quite a bit convenience to science research and experiment analysis. And currently it plays an important role on studying wireless communication, especially on VHF communication. The model precision has great effects on the effectiveness of system in the simulating study. Therefore, how to build accurate and efficient model is the key part of system simulation.Research on VHF communication simulation can assess the network and support decision-making effectively. When developing VHF communication simulation systems, System-level simulation software for modeling wireless channel capacity is insufficient to meet the need for accurate simulation. Geography and other factors on the transmission of electromagnetic interference have a great impact on VHF communication due to the line of sight. In order to build accurate and efficient simulation model, the system must take into account these factors in the physical layer model of VHF communication simulation system. HLA provides a general framework of building and describing simulation application and improves the interoperability between simulation systems. It has become a widely used technical specification for Distributed Interactive Simulation. In this paper, we build a VHF communication simulation system which enhances model accuracy a lot, and implement a new system based on HLA. Experimental results confirm accuracy of the built model and validity of the Federation.The main contributions of this paper can summarized as follows.First, this paper proposes and implementes a VHF communication Simulation system framework based on HLA. The framework combines a variety of simulation models and has good interoperability and reusability. By using Simulink-based channel model and WI-based simulation model, it makes up the defects of Omnet++-based node model and models the physical layer more accurate.Second, the paper introduces major Federates combining with the Federation architecture and implements self-control mechanism to promote the Federation time. Experimental results show that the time between Federates advances orderly, so the mechanism works effectively.Finally, we verify accuracy of the model and validity of the Federation by building simulation scenarios and analyzing experimental results. As taking into account more factors, our model can obtain more accurate results. Information exchange between Federates is correct and the Federation runs effectively.