Behaviour of OFDM System using MATLAB Simulation

Orthogonal Frequency Division Multiplexing (OFDM) is mainly designed to combat the effect of multipath reception, by dividing the wideband f requency selective fading channel into many narrow flat sub - channels. OFDM offers flexibility in adaptation to time varying channel condition by adopting the parameters at each subcarrier accurately . To avoid ISI due to multipath, successive OFDM s ymbols are separated by guard band. This makes the OFDM system resistant to multi - path effects [1].The idea of using parallel data transmission by FDM was published in mid 60s [2].However, recently the attention toward OFDM h as grown rapi dly in the field of wireless an d wired communication systems. This is reflected by the adoption of this technique in applications such as digital audio/video broadcast, wireless LAN (802.11a and HiperLAN2) , broadband wireless (802.16) and xD SL [3]. In this paper design of OFDM system transmitter and receiver is introduced and Simulation is done using MATLAB