# A Multimode Fusion-Based Aviation Communication System
## 1 Introduction  
With the rapid development of China's civil aviation [1] and civil aircraft industry in recent years, aviation electronic equipment [2] has become an important part of modern aircraft, playing a vital role in the performance and safety of aircraft. To accomplish a normal fight, the aircraft should include all necessary communication systems for shortwave communication, ultra-shortwave communication, satellite communication [3], data links, etc. Due to the increasing number of aviation electronic equipment, the volume and total mass of communication systems are highly increased [4], and the electromagnetic interference problems [5, 6] between equipment are getting worse, each independent communication device needs to be allocated a certain space in the cabin, which exceeds the limit of cabin space burden. In this article, a new design and engineering implementation scheme for aviation multimode fusion-based communication systems is proposed to solve the challenges faced by aviation communication. These challenges include numerous communication links, inconsistent communication protocols [7], complex cabin equipment, and a limited working environment, The proposed system contains various functions, such as dedicated ad hoc network communication [8], 5G public network communication [9], BeiDou satellite communication [10], RTK high-precision positioning and navigation [11, 12], and ADS-B broadcasting communication [13]. We firstly establish the intelligent fusion platform based on the research of multiple communication links, protocols, and standards, making intelligent decision-making and execution of communication modes, providing insistent interactive information services such as location, voice, image, video, and data for the safe navigation, addressing the current shortcomings of aviation communication, such as low communication rate, long time delay, and poor interconnection capability. Secondly, we build a database, analyze data, and establish a visualization platform through multiple communication links; do the research on algorithms for aircraft trajectory prediction and abnormal behavior analysis; enhance the automation and intelligence level of aviation supervision; reduce the occurrence of flight accidents and illegal activities; and consequentlyensure the safety and economy of flight, as well as realize all-weather, all-around, all-time data transmission and remote monitoring guarantee. Information fusion technology [14; 15; 16; 17; 18; 19] is intended to combine information obtained from multiple sources into a unified description; it is a multi-level and multifaceted processing engineering that involves detecting, correlating, combining, and estimating multi-source data. With the continuous development of aviation communication technology, new application requirements and target characteristics pose new challenges to the multi-source information fusion technology of aircraft, mainly reflected in subverting traditional communication styles with networked information technology, emphasizing more on the allocation of time and space, and obtaining comprehensive situational information and resource support in the air; increasingly complex characteristics of aircraft targets originated by electromagnetic interference and environmental interference, as well as growing application demand for high-precision tracking flight and electromagnetic anti-interference; and under the condition of the breakthroughs in networked information technology, the integrated collaborative communication makes long-distance air command and control, information transmission, target guidance, and collision warning possible. The point of aviation information fusion technology is to perceive and analyze the environment in which the target is located to make correct decisions and reactions.