Low Complexity Iterative Piece-Wise Companding Transform for Reduction of PAPR in MIMO OFDM Systems

Objectives: This paper presents one of the solutions to minimize the problem of PAPR (Peak Average to Power Ratio) in OFDM systems. This work mainly focuses on introducing iterative companding approach along with the available standard reduction methods. Methods/Statistical Analysis: This paper includes Iterative Linear Transform Approach (ILST), Iterative Two Piecewise Companding Transform (ITPWC) and Iterative Piecewise Companding Transform (IPCT). A performance evaluation was performed and found that IPCT attained very low BER and PAPR in all the above mentioned approaches. Apart from this it also consumes low computations there by proving the best of its class at the earliest. Findings: BER performance of the proposed IPCT approach under different channel environment depicts that the proposed approach provides less BER against ILST and ITPWC with 3-3.5 db improvement. Application/Improvement: The developed Iterative Piecewise Companding Transform (IPCT) is more suitable for MIMO systems which make it to be widely used for 4G, WLAN and Wimax applications.