Electronic warfare refers to the military struggle between the opposing sides for the use and control of the electromagnetic spectrum, including electronic detection and anti-detection, electronic interference and anti-interference, electronic deception and anti-deception, electronic stealth and anti-stealth, electronic destruction and anti-destruction. With the rapid development of the electronic level of the army, electronic warfare has been used as a direct means of attack and defense, forming a multi-dimensional battle of “Land, sea, air, sky and electricity”. Electronic Warfare (ew) is a kind of technology that studies the electromagnetic struggle with electronic equipment or equipment. It relates to radar countermeasure, communication countermeasure, C3I countermeasure, iff and navigation countermeasure and so on. With the rapid development of electronic technology, electronic warfare (ew) has become an important form of warfare, and is opening the door of information warfare.

SIMULATION SCENARIO:
　　Simulation Technology is based on control theory, similarity principle, digital Simulation and computing technology, information technology, C3I system and EW system technology and related professional technology in its application field, with the help of computer and many kinds of special physical effect equipments, with the help of C3I system and EW system model, it is a new and comprehensive technique to study the dynamic test of real or imagined C3I system and EW system. It is also a controlled, non-destructive test that costs very little and allows for many repetitions. VR technology is a new kind of computer human-computer interaction technology, which breaks through the simple digital way of human-computer information interaction and provides the technical support for establishing friendly human-computer interface. Create a highly lifelike environment, so that people as if in the real scene, to achieve a harmonious combination of man-machine environment, and then produce immersive mysterious feeling. VR technology can be combined with military deception, that is, the virtual information (such as the virtual fleet action, interactive scene and battle plan) can be injected into the enemy’s command and control system in time during the war, which can make the enemy mistake the virtual information and make the enemy confused. The battlefield environment mainly includes topography, climate and meteorology. The use of VR technology to produce realistic battlefield environment will provide good conditions for tactical training. Because of the sudden increase in the war, warfighters can not reach the battlefield in advance to familiarize themselves with the terrain. Therefore, using VR technology to simulate the battlefield environment in the future, and let the soldiers go into the environment to experience, is undoubtedly an effective way to solve this problem. In order to improve the fidelity of battlefield environment virtual reality system, it is necessary to establish corresponding battlefield environment graphics image database. This 3D Graphics Image Library includes images of various battlefield objects (such as aircraft, missiles, naval guns, etc.) , battle scenes, battle backgrounds, electronic countermeasure and personnel of both sides in the process of battlefield environment simulation. With a three-dimensional Graphics Library, participants can realistically “Enter”The battlefield. The battlefield object and the combat scene are generally realized by the modeling software in the virtual reality system. The combat background mainly refers to the weather change, the rain, the fog, the snow and the night scene and so on surrounding environment background, this must draw support from the VR related technical means to realize. As for warfighter simulation, it can be realized by graphical modeling or image mapping or combination of the two. Distributed virtual simulation (DIS) is a technology based on network, which integrates simulation system, computer generated force and other equipment with Lan, Wan and telecommunication network. With the development of modern war, inter-service joint exercises have become extremely important. The use of DIS technology can achieve the unification of the architecture among all services, and can reduce the military scale in a real sense, and exchange the quantity reduction with the quality improvement. By adopting VR technology and conducting cooperative operation exercise in virtual environment, the effect of Engineering Support Scheme and operational capability can be evaluated, thus obtaining data similar to “Actual operation”, and accumulating exercise experience. Linking geographically dispersed simulators through DIS technology to enable various military simulators such as aircraft, missiles, ships, ground defense system artillery, radar, missiles and so on to coordinate operations, to create an environment for large-scale military exercises. VR technology will determine requirements, design, prototype, and mass-produce for weapons and equipment, simulate training for fleets, combat readiness, formulate synthetic warfare protocols, and formulate contingency plans, to Provide an integrated operational environment for almost all military activities such as post-war assessment and war history analysis, which will facilitate a smooth transition from virtual weapons and battlefields to real weapons and battlefields, the impact on various military activities will be very far-reaching, with a very wide range of military applications.

COMMUNICATION EFFECTS SERVER:
　　The communication effect server for complex electromagnetic environment is a real-time hardware-in-the-loop simulation system, which can interoperate with other simulation and simulation systems, such as virtual forces, physical and physical simulators, the transmission effects of tactical services, such as transmitting and receiving of communication equipment based on cable, microwave, short wave, ultrashort wave, satellite, data link, communication controller, tactical internet controller, switch, router and so on, transmitting through terrain, meteorology, civil, military complex electromagnetic environment, command and control, message, telephone, voice, image, video and so on are simulated, to provide close to the real complex electromagnetic environment of the battlefield communications, this makes it possible for users to construct a tactical communication environment with high precision and low cost in a short period of time on the scale of echelon of armies, divisions, Brigades, regiments, Battalions, companies, platoons, squads and individual soldiers, it provides a real-time hardware-in-the-loop simulation system for equipment development, weapon test, military training, red-blue confrontation and other capabilities. The Complex Electromagnetic Environment Communication Effects Server is based on the EXata hardware in the loop simulation engine developed by SNT for the US military, it has real interface, simulator interface, HLA interface, man-in-the-loop interface, software-in-the-loop interface and other external interface and other subsystems. As shown in Figure 1.

图1 复杂电磁环境通信效果服务器的外部接口

Hla Interface:
　　

High Level Architecture (Hla) is a software interface specification developed with the support of the US Department of Defense. The aim of HLA is to interoperate two or more software programs (usually simulation software) . Such as complex electromagnetic environment communication effect server integration HLA interface. Users can interact with the communication effect server of complex electromagnetic environment and other software programs which also have HLA interface, but it needs to be customized by developers. CGF and other federation members can send Hla Interaction to the communication effect server of the complex electromagnetic environment to activate the communication modeling inside the Communication Effect Server of the complex electromagnetic environment, the Communication Effects Server in complex electromagnetic environment will return the results of communication in real time. Users can also customize the traffic modeling inside the Communication Effect Server in complex electromagnetic environment outside of Hla interaction without affecting the external federated interaction. Figure 2 shows a CGF software, VR-Forces, based on the same runtime architecture (Mak Rti) , and a communication effect server in a complex electromagnetic environment under the same combat scenario graphical user interface. The communication effect server in complex electromagnetic environment introduces the information sharing and transmission effect in complex electromagnetic environment into the virtual military confrontation training system, it provides a more real and accurate method for the traditional battle effectiveness evaluation based on CGF, which is of great significance in the era of information warfare.

　　图2 复杂电磁环境通信效果服务器和CGF之间通过RTI HLA交互最新的信息更新

VR AND EXTERNAL COMMUNICATION EFFECTS SERVER CONFIGURATION:
　　By Default, VR-Forces are configured to use only a simple, built-in communication effects model that allows all information to be passed to their recipients. Using an External Communication Effects Model Server, we must:

　　① Enables Radio Transmitter emission for any entity type that will pass confidence through the Communication Effects Server

　　② Set the external communication effect model as the communication model available for VR-Forces

　　③ Configure external communication effects model

　　④Radio Transmitter activated. release

　　⑤ Enable External Communication Effects Model

　　⑥ Configure external communication effects model

VR-FORCES AND QUALNET:
　　If you want to use VR-Forces with Qualnet, you must configure VR-Forces to use an external communication effects server (detailed in the 2. VR-Forces configuration) . Note the following requirements: Qualnet only supports special network configurations. Refer to the detailed help documentation for Qualnet. If using MÄK RTI EXEC. We need to create a Qualnet scenario that matches the VR-Forces scenario. The Qualnet scenario is used by Qualnet as a communication, effect, and server. This can be done manually or with the Qualnet Hla Extractor tool.

Category: Integrated Environment Scenario Simulation