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标题：PAPR Reduction Of OFDM Using An Exponential Companding Technique
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作者：G.Kranthi Kumar ; S.Lenin Kumar Reddy ; K.Santhosh Kumar M.Tech 等
期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2015
卷号：4
期号：4
页码：11182-11187
出版社：IJECS
摘要：OFDM is a bandwidth efficient multicarrier modulation where the available spectrum is divided intosubcarriers, with each subcarrier containing a low rate data stream. OFDM has gained a tremendous interestin recent years because of its robustness in the presence of severe multipath channel conditions with simpleequalization, robustness against Inter-symbol Interference (ISI), multipath fading, in addition to its highspectral efficiency. However, the Peak-to-Average Power Ratio (PAPR) is a major drawback of multicarriertransmission system such as OFDM. High PAPR increases the complexity of analog-to-digital (A/D) anddigital-to-analog (D/A) converters, and lowers the efficiency of power amplifiers. The aim of this projectwork is to investigate the OFDM scheme, and realize a fully functional system in software and analyzinghow it reduces the Peak to Average Power Ratio (PAPR). Different PAPR Reduction techniques developedfor OFDM are analyzed, based on the Computational Complexity, Bandwidth expansion and errorperformance. In this Project work, new Companding Transform Techniques is developed for PAPRreduction of OFDM system. This guarantees the improved performance in terms of BER while reducingPAPR effectively and efficiently.