Compare Between Simple OFDM and OFDM with Companding Technique for Efficient PAPR Reduction
Journal: International Journal of Science and Research (IJSR) (Vol.3, No. 7)Publication Date: 2014-07-05
Authors : Rikhee Ram; Aashish Hiradhar;
Page : 1767-1771
Keywords : Companding; OFDM; PAPR;
Abstract
Orthogonal Frequency Division Multiplexing (OFDM) has become the most widely adopted technology in wireless communication systems. OFDM is limited mainly by its high Peak-to-Average Power Ratio (PAPR). A uniformly distributed nonlinear companding scheme efficiently reduces PAPR with a low Bit Error Rate (BER). However, the uniformly distributed companding scheme cannot perform variably to satisfy the different performance requirements for the systems. Therefore, this work proposes a novel scheme that transforms the OFDM signals into a trapezium distribution. The uniformly distributed companding scheme is a special case of the proposed scheme. The general formulas of the proposed scheme are derived and the trade-off between PAPR reduction and BER performance is achieved by setting the value of a parameter. Then, the simulation results show the PAPR reduction and the BER over the AWGN and multipath channels, indicating that the proposed scheme provides a favorable trade-off between the PAPR reduction and the BER.
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Last modified: 2021-06-30 21:02:23