This research paper by American Institute of Aeronautics and Astronautics focuses on the timing synchronization of the received Orthogonal Frequency Division Multiplexing OFDM signal, for detecting reliably the start of the OFDM frame and positioning accurately the FFT window. An important category of approaches that are available in the literature, is the one where a null-symbol is used to detect the beginning of the frame. The null-symbol approach is suitable only for continuous transmissions. A different approach, is to blindly estimate the beginning of the OFDM symbol by exploiting the correlation between Cyclic-Prefix (CP) and the useful part of the symbol.
The concept of remotely controlling a vehicle was first used for military purposes by German motor-boats to ram enemy ships in World War I (WWI). A client-server application for the remote control of a wireless mobile robot is described. The application requires an onboard computer running a Java Virtual Machine (JVM) on the vehicle. The mobile robot is the client, which is controlled by the server. The server can be any desktop machine or another mobile robot. This paper shows how mobile robots can be controlled using any computer on the internet through a wireless Ethernet network.