PAPR Evaluation of 3GPP LTE Physical Layer

Abstract

Communication is one of the important aspects of life. It is very difficult to survive without communication. With the advancement in age and its growing demands, there has been rapid growth in the field of communications. Signals, which were initially sent in the analog domain, are being sent more and more in the digital domain these days. For better transmission, even single-carrier waves are being replaced by multi-carriers. Multi carrier systems like CDMA and OFDM are now a days being implemented commonly. In the OFDM system, sub-carriers are placed orthogonally so that they do not interfere with each other. Presence of guard band in this system deals with the problem of ISI. But the large Peak to Average Power Ratio of these signals is a serious limitation of these systems. In this thesis, basics of OFDMA and SC-FDMA has been studied and a no. of techniques have been surveyed for reducing the effect of PAPR in OFDM system.