Performance Study of OFDM Based on In-Place Wavelet Transform

Abstract

In this paper, a proposed model based on in-place wavelet transform (IP-WT) was suggested to improve the performance of the orthogonal frequency division multiplexing (OFDM) under the additive white Gaussian noise (AWGN), and flat fading channel. The proposed model does not require additional arrays at each sweep such as in the ordered Haar wavelet transform; this ensures fast processing time with minimum memory size. The results extracted by a computer simulation and compared with the performance of the conventional model based on fast Fourier transform (FFT). As a result, it can be seen that the proposed technique has high performance improvement over the conventional OFDM system based FFT, where the bit error rate (BER) is widely reduced under these models of channels.