Effect of Pulse Shaping On Ber Performance of QAM Modulated OFDM Signal

Pulse shaping of a signal at base-band forms a more important tool in controlling and analyzing the parameters like ISI, the modulated signal envelope uniformity, the phase continuity as these parameters lead to the efficient spectral confinement of a binary signal which is a future and nowadays a major important aspect in the design of a wireless cellular communication system. In this paper, different time-limited waveform are discussed which are basically available as windows functions and comparing the performance of Rectangular, Raised cosine and BTRC and prove that the BTRC pulse is supposed to be a batter pulse shaping for OFDM in terms of obtaining better BER performance and proposed two pulse shapes which are giving better E[ρi2] in respective cases which in turn provides better BER as compared to BTRC which was considered as one of the best pulse shape.