Simulation of Turbo Coded OFDM System

The popularity of Orthogonal Frequency Division Multiplexing (OFDM) has been increasing rapidly in a high speed wireless communication systems. In OFDM we basically divide a wideband fading channel into a narrowband channels. OFDM is capable of neglecting or deleting the diverse ( bad) effects of multipath fading with the help of a one tap equalizer. A system is needed that can transmit information wirelessly and accurately. The technique of combining an OFDM which is suitable for high data rate transmission with a Forward Error Correction (FEC) method over a wireless channels have been done already by many engineers. In this thesis, we basically improve the working of an OFDM system by adding Turbo codes. By proper Power allocation and efficient use of coding, the performance at the high data rates improves. Simulation is to be done over two channelsAWGN and Rayleigh channels. In order to improve the performance convolution coding is used [1].