Abstract- Studies on Performance of Pulse Shaped OFDM Signal

Studies on Performance of Pulse Shaped OFDM Signal Written by Administrator Wednesday, 16 March 2011 08:55 Last Updated Monday, 21 March 2011 07:29 The Orthogonal Frequency Division Multiplexing (OFDM) transmission system is one of the optimum versions of the multi-carrier transmission scheme. The OFDM is referred in the literature as Multi-carrier, Multi-tone and Fourier Transform based modulation scheme. The OFDM is a promising candidate for achieving high data rate transmission in mobile environment.In this paper, different power spectral density (PSD) curves of OFDM signal with various pulse shapes are presented. The final pulse shaped OFDM waveform is then analyzed for frequency domain response and the PSD in each case and it’s also an analyzed on the basis of its modulation index which equally varies with the used window function during transmission. The simulation results are presented in a tabular manner enabling to analyze and establish the superiority, at a glance, of a specific window function applied (pulse shaped). The OFDM signals with the pulse shapes, like Rectangular, Blackman, Gaussian,Hamming and Hanning are tried. The effect of some of these time waveforms on the OFDM system performance in terms of power spectral density (PSD) & modulation index has been investigated.