International Journal of Networks and Application. Volume 1, Number 1 (2010), pp. 19--28 © International Research Publication House http://www.irphouse.com Automatic Antenna Assembly for DVB Access on the Move Sourav Dhar, R. Bera, D. Ghosh, Biswadeep Dasgupta and Bandaru Viswavikyath Faculty of Electronics and Communication Engineering Sikkim Manipal Institute of Technology, Sikkim Manipal University Majitar, Rangpo, East Sikkim 737136, India E-mail: dhar.sourav@gmail.com Abstract 4G vision is the convergence of local network, cellular and broadcast networks. An intelligent transportation system (ITS), which is a subset of information and communication technology, is an application of 4G.A software controlled intelligent antenna assembly is proposed here for access of digital video broadcasting from vehicle as a part of ITS. This is achieved by measuring the SNR and then using motors to 3-Dimensionally move the receiver parabolic dish to align with satellite. An accelerometer is used to determine the direction of motion of the vehicle on which the receiver antenna is mounted. The initial alignment of the antenna by SNR measurement provides the data for alignment retention in mobile environment. MATLAB 7.4 platform is used to develop the master control software. Comparative results are shown with and without corrective algorithm. Introduction Intelligent Transportation Systems (ITS) efforts to add remote sensing, information and communications technologies to transport infrastructure and vehicles to improve safety and reduce vehicle wear, transportation times, and fuel consumption etc. "Smart cars", to be used in ITS, must provide antennas for many different purposes, including safety, entrainment, voice communications, data communications, guidance, emergency, navigation, and locating functions [3].ITS applications can be broadly classified in two categories: safety applications and non safety application. Automatic cruise control (ACC), Driver assistance systems (DAS) and Collision avoidance and warning systems (CAWAS) are some examples of safety application. On the other hand, internet access from car, vehicle to vehicle (V2V) and vehicle to infrastructure