Date Added: Mar 2012
Orthogonal Frequency Division Multiplexing (OFDM) is a frequency division multiplexing scheme utilized as a digital multi carrier modulation method for high speed broadband communication systems. The disadvantages of OFDM system is its high sensitivity to carrier frequency offset which distorts the orthogonality between subcarriers resulting in Inter Carrier Interference (ICI) and Peak to Average Power Ratio (PAPR) due to non linear effects of Power Amplifier (PA). The reduction in PAPR is desirable in order to obtain power efficiency of the amplifier and to increase Bit Error Rate (BER) performance. Bandwidth limited systems often employ pulse shaping techniques for reduction of PAPR, ICI, bandwidth and minimizing the likelihood of error at the receiver.