A tremendous technological transformation during the last two decades has provided a potential growth in the area of digital communication and lot of newer applications and technologies are coming up every day. The looking to the limitations of a 3G wireless communication system, a more improvised 4G mobile system is thought off, having more transmission data rate, typically up to 1Gbps which requires lesser band-width, meaning a combination of modulation and multiplexing can be a promising solution. The OFDM has thus come out as a solution for the 4G system which can fulfill both the requirements. The performance of an OFDM system is preferably measured in terms of BER by varying the SNR. The next step is to developing two pulse shapes named as Proposed-I and Proposed-II pulse shapes with requisite theoretical background and adequately supported by simulation results. This betterment in BER performance has been observed for almost all values of roll off factors. The overall contribution of this book is the development of two pulse shapes providing better BER performance in an OFDM system (European Model with 2K Mode DVB-T Standards) with QAM as digital modulation technique.