A New Coding Scheme for Data Security in RF based Wireless Communication

Abstract

A radio-controlled (RC) aircraft is controlled remotely by a hand-held transmitter and a receiver within the craft. The working mechanism of such an arrangement designed using an AT89S51 microcontroller is reported in this chapter. The primary focus of the chapter is to describe the design of the interfacing of transceiver module with AT89S51 microcontroller and control the movement of the aircraft according to the instruction given remotely. The microcontroller reads the input given by the user and transmits the data to the receiver at the aircraft. The receiver module receives the transmitted signal and demodulates it and gives the data as serial sequence of bits at the output. The serial data are then given to the decoder which transforms the data from serial to parallel. This set of data is used to control motors and any related device. A special coding technique is used to secure the transmitted data.