Therefore the growth of the UAV number and the need for reliable data transfer have caused question marks about frequency management, the way of data transmission. For this reason lots of research and development efforts are being handled. This document has been briefly mentioned the UAV systems and communication subsystems. | Journal of Automation and Control Engineering Vol. 4, No. 3, June 2016 Unmanned Air Vehicle System’s Data Links İsmet Çuhadar and Mahir Dursun Department of Electrical and Electronic Engineering, Gazi University, Faculty of Technology, Ankara, Turkey Email: ismetcuhadar@, mdursun@ touched on and measures to be taken like crypto are discussed. Abstract—Together with the development of technology, Unmanned Air Vehicle System (UAVS)’s usage is growing day by day. Accordingly, producing and using UAVS is a big competition among the countries. So it is very important that UAV’s have to be firm and reliable. Another important point is the data links; data transmission must be accurate and continuous. Nowadays UAVS are produced by many companies. But information security problem still continues. Therefore the growth of the UAV number and the need for reliable data transfer have caused question marks about frequency management, the way of data transmission. For this reason lots of research and development efforts are being handled. This document has been briefly mentioned the UAV systems and communication subsystems. II. UAV’S DEFINITION Generally known as drones are a kind of plane that controlled remotely. They can be used for assault as well as ISR. Besides, they serve the purpose of atmosphere monitoring, weather forecast or scientific research, pipeline tracking, path control, search and rescue operations, aerial photography, oil, gas and mineral research [9]. A. The Elements of UAVS UAV systems are formed by the four elements shown in Fig. 1. Index Terms—UAVS, data, security, frequency, data link I. INTRODUCTION The most critic subsystem in UAVS is communication. Although UAVS are produced by many companies, information/data link security problem still continues. Beside data transmission over long distances, it has big importance to send the accurate information to the right point. Another problem of the data transmission is the outside .
