Open AccessOFDM based FFT compared with OFDM based wavelet transform
Author(s) -
Wael Hussein Zayer,
Ahmed Kateeb
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/518/5/052011
Subject(s) - orthogonal frequency division multiplexing , electronic engineering , qam , computer science , wavelet transform , fast fourier transform , wavelet , harmonic wavelet transform , quadrature amplitude modulation , bit error rate , algorithm , discrete wavelet transform , mathematics , telecommunications , channel (broadcasting) , engineering , artificial intelligence
In recent year the orthogonal frequency division multiplexing widely used in wireless communication system, the conventional structure of OFDM used Inverse Fast Fourier Transform for modulation and multiplexing the data at the transmitter side and used Fast Fourier Transform at the receiver to demodulation and demultiplexing the data. In this paper, Inverse Wavelet Transform IWT used in transmitter instead of IFFT and Wavelet Transform WT in receiver side instead of FFT and compared between two methods with different noise in the AWGN channel. The performance found by bit error rate BER. Also different modulation scheme have been used (16-QAM, 32-QAM, 64-QAM and 128-QAM) and different types of wavelet filters Daubechies (Db-3, Db-5, Db-8, Db-10) and Haar filter. to compare between them and find which achieved better performance.