DWT based FFT in Practical OFDM Systems

Author

Ooi, A.K.L. ; Drieberg, Micheal ; Jeoti, Varun

Author_Institution

Commun. Group, Univ. Teknologi PETRONAS, Perak

fYear

2006

fDate

14-17 Nov. 2006

Firstpage

1

Lastpage

4

Abstract

OFDM is a multi-carrier technique based on a very simple modulation scheme that uses IFFT and FFT at its core for transmission and reception respectively. The performance of the OFDM receiver is significantly affected in the presence of noise in the wireless channel. In this work a receiver that has built-in denoising capacity with little additional computation is proposed. lt is based on a DWT based FFT algorithm. Experiments using MATLAB are conducted to verify the feasibility of this denoising algorithm on OFDM signals. The result shows noise suppression thus supports our claim

Keywords

OFDM modulation; discrete Fourier transforms; discrete wavelet transforms; interference suppression; mathematics computing; signal denoising; wireless channels; DWT; IFFT; MATLAB; OFDM receiver; built-in denoising capacity; discrete wavelet transform; inverse fast Fourier transform; modulation scheme; multicarrier technique; noise suppression; orthogonal frequency division multiplexing; reception; transmission core; wireless channel; Discrete wavelet transforms; Electronic mail; Fast Fourier transforms; Filters; MATLAB; Modulation coding; Noise reduction; OFDM modulation; Quadrature phase shift keying; Tin; DWT based FFT; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2006. 2006 IEEE Region 10 Conference

Conference_Location

Hong Kong

Print_ISBN

1-4244-0548-3

Electronic_ISBN

1-4244-0549-1

Type

conf

DOI

10.1109/TENCON.2006.344069

Filename

4142336