vioft2nntf2t|tblJournal|Abstract_paper|0xf4ff39501f0000004b4c010001000600 Orthogonal Frequency Division Multiplexing (OFDM) is a fascinating approach for wireless communication applications which require huge amount of data rates. However, OFDM signal suffers from its large Peak-to-Average Power Ratio (PAPR), which results in significant distortion while passing through a nonlinear device, such as a transmitter high power amplifier (HPA). Due to this high PAPR, the complexity of HPA as well as DAC also increases. For the reduction of PAPR in OFDM many techniques are available. Among them companding is an attractive low complexity technique for the OFDM signal’s PAPR reduction. Recently, a piecewise linear companding technique is recommended aiming at minimizing companding distortion. In this paper, a collective piecewise linear companding approach with Discrete Hartley Transform (DHT) method is expected to reduce peak-to-average of OFDM to a great extent. Simulation results shows that this new proposed method obtains significant PAPR reduction while maintaining improved performance in the Bit Error Rate (BER) and Power Spectral Density (PSD) compared to piecewise linear companding method.
Thammana Ajay, K. Murali Krishna
Anil Neerukonda Institute of Technology and Sciences, India
OFDM, PAPR, Discrete Hartley Transform, Companding Distortion, Piecewise Linear Companding.
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| Published By :
ICTACT
Published In :
ICTACT Journal on Communication Technology
( Volume: 7 , Issue: 2 , Pages: 1315-1320 )
Date of Publication :
June 2016
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117
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