Performance Enhancement of OFDM System with ICI Reduction Technique.

orthogonal frequency-division multiplexing (OFDM) communication systems, the frequency offsets in mobile radio channels distort the orthogonality between subcarriers resulting in inter-carrier interference (ICI). In this paper, First OFDM system is modeled and simulated under different channel conditions such as AWGN and Rayleigh fading. Subsequently pulse shaping technique for ICI power reduction in OFDM systems is investigated. A number of pulse shaping functions such as Rectangular pulse shape, Sinc power pulse (SP) and Improved sinc power pulse (ISP) have been considered for ICI power reduction. The performance of each pulse shaping function is evaluated and compared with each other using the parameters such as ICI power, SIR (Signal to Interference Ratio) and BER (Bit Error Rate). It is found that ISP pulse shape outperforms to all other pulse shaping functions by the above parameters. [ABSTRACT FROM AUTHOR]