# A Multimode Fusion-Based Aviation Communication System
## 4 Application Testing
\\ \hline \multirow{4}{*}{Command and Remote Control} & Ad hoc Network Communication Link & Upload command data from ground control aircraft to multiple aviation multimode fusion communication terminals through ad hoc network links, and send it to the aircraft control computer for processing. \\  & & The data from the ground control aircraft command is transmitted to the aviation multimode fusion communication terminal through a public network link. This is done via a ground base station and then sent to the aircraft control computer within the base station’s coverage range for processing. \\ \cline{2-3}  & BeiDou Satellite Communication Link & Transmit the aircraft command data to the aviation multimode fusion communication terminal via the BeiDou satellite communication link, and send it to the aircraft control computer for processing. \\ \hline \multirow{4}{*}{Aviation Situational Awareness} & AdS-B Link & The aircraft’s flight control computer receives ADS-B messages in real-time from other aircraft, which are analyzed and processed to determine the current air situation. These messages are also simultaneously transmitted to the ground control center through dedicated ad hoc network links and public network links. \\ \cline{2-3}  & ADS-B messages from aircraft are transmitted simultaneously to the ground control center through dedicated ad hoc and public network links. This allows for analysis and display of the current air situation. \\ \hline \multirow{2}{*}{High-precision Positioning Navigation} & \multirow{2}{*}{RTK Link} & Providing high-precision timing, speed measurement, direction finding, and precise positioning services for aircraft. \\ \cline{2-3}  & & The aviation multimode fusion communication system is designed to integrate different communication links, such as dedicated ad hoc network communication, 5G public network communication, BeiDou satellite communication, RTK high-precision positioning and navigation, and ADS-B broadcasting. This system offers an extensive satellite-aerial-ground integrated communication network, with various functions such as image and data transmission, remote control, telemetry, high-precision positioning, and aviation situation awareness. Its capabilities make it a valuable asset in the field of aviation communication. \\ \hline \multirow{4}{*}{Data Transmission} & Ad hoc Network Communication Link & The flight status data collected by the aircraft control computer is transmitted to the ground control center via the BeiDou satellite communication link and analyzed and displayed. \\ \cline{2-3}  & BeiDou Satellite Communication Link & The flight status data collected by the aircraft control computer is transmitted to the ground control center via the BeiDou satellite communication link and analyzed and displayed. \\ \hline \multirow{4}{*}{Command and Remote Control} & Ad hoc Network Communication Link & Upload command data from ground control aircraft to multiple aviation multimode fusion communication terminals through ad hoc network links, and send it to the aircraft control computer for processing. \\  & & The data from the ground control aircraft command is transmitted to the aviation multimode fusion communication terminal through a public network link. This is done via a ground base station and then sent to the aircraft control computer within the base station’s coverage range for processing. \\ \cline{2-3}  & BeiDou Satellite Communication Link & Transmit the aircraft command data to the aviation multimode fusion communication terminal via the BeiDou satellite communication link, and send it to the aircraft control computer for processing. \\ \hline \multirow{4}{*}{Aviation Situational Awareness} & AdS-B Link & The aircraft’s flight control computer receives ADS-B messages in real-time from other aircraft, which are analyzed and processed to determine the current air situation. These messages are also simultaneously transmitted to the ground control center through dedicated ad hoc network links and public network links.