Use of Turbo Coding in OFDM System for Improving BER
In this paper, the authors deal with the concept of Turbo coded OFDM (Orthogonal Frequency Division Multiplexing) which improves the system throughput. Orthogonal frequency division multiplexing is a popular modulation method in high speed wireless transmission. It removes the detrimental effect of multipath fading by partitioning the wideband fading channel into flat narrow band channels. For this purpose simple one tap equalizer is used. In this paper, they will see how performance of an OFDM system can be improved by adding turbo codes to it. This will help to maintain the system performance under a desired bit error rate, as there were errors occurring in burst form in OFDM which eventually degrades the efficiency of the system. Moreover, they can easily overcome the major disadvantages of OFDM i.e. ISI (Inter Symbol Interference) and ICI (Inter Carrier Interference) by implementing it.