An efficient technique for OFDM system using discrete wavelet transform

Authors:
W. Saad;N. El-Fishawy;S. EL-Rabaie;M. Shokair
Affiliations:
Dep of Electronic and Communication Eng., Faculty of Electronic Engineering, El-Menufiya University, Egypt;Dep of Electronic and Communication Eng., Faculty of Electronic Engineering, El-Menufiya University, Egypt;Dep of Electronic and Communication Eng., Faculty of Electronic Engineering, El-Menufiya University, Egypt;Dep of Electronic and Communication Eng., Faculty of Electronic Engineering, El-Menufiya University, Egypt
Venue:
GPC'10 Proceedings of the 5th international conference on Advances in Grid and Pervasive Computing
Year:
2010

Citing 4
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Abstract

With the rapid expand of wireless digital communications, demand for wireless systems that are reliable and have a high spectral efficiency have increased too Orthogonal Frequency Division Multiplexing (OFDM) has been recognized for its good performance to achieve high data rates Fast Fourier Transforms (FFT) has been used to produce the orthogonal sub-carriers Due to the drawbacks of OFDM-FFT based system which are the high peak-to-average ratio (PAR) and the synchronization, many works have replaced the Fourier transform part by wavelet transform In this paper, an efficient technique for the OFDM system using wavelet transform is proposed This system shows a superior performance when compared with traditional OFDM-FFT systems through an Additive White Gaussian Noise (AWGN) channel The system performance is described in Bit Error Rate (BER) as a function of Signal to Noise Ratio (SNR) and the peak-to-average ratio (PAR) Furthermore, the proposed system gives nearly a perfect reconstruction for the input signal in the presence of Gaussian noise.