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Effects of Nonlinearity on DFT-OFDM and DWT-OFDM Systems

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Author(s): Sivakrishna jajula1 , P.V.Ramana

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 6;
Start page: 2603;
Date: 2013;
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Keywords: OFDM is a multicarrier modulation scheme that provides strong robustness against Inter-Symbol

ABSTRACT
this paper investigates performance of Discrete Fourier Transform based Orthogonal Frequency Division Multiplexing (DFT-OFDM) and Discrete Wavelet Transform based OFDM (DWTOFDM) Systems when the signals are passed through a nonlinear High Power Amplifier (HPA). In the case of DWT-OFDM, several wavelets such as Daubechies, Symlet and Biorthogonal are evaluated. Simulation results show that DWT-OFDM is more robust against nonlinearity in comparison to DFT-OFDM.

Tango Jona
Tangokurs Rapperswil-Jona

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