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Authors
Affiliations
1 Jazan University, SA
2 Helwan University, Cairo, EG
3 Menoufia University, Menou, EG
4 Menoufia University, EG
5 Dept. Electronics and Electrical Communications, Menoufia University, EG
6 Menoufia University, Menouf, EG
Source
Digital Signal Processing, Vol 5, No 12 (2013), Pagination: 393-403
Abstract
This paper presents a new implementation of Discrete Multi-Tone (DMT) systems based on the Discrete Wavelet Transform (DWT) and time-domain equalization to maximize the bit rate. The objective of the proposed DWT-DMT system is to make use of the sub-band decomposition property of the DWT to reduce the channel effects on the transmitted signals. The mathematical model of the Time-domain Equalizer (TEQ) utilized in this paper is presented. This equalizer is tested in the Fast Fourier Transform Discrete Multi-Tone (FFT-DMT) system, and in the proposed DWT-DMT system for comparison. Simulation experiments shows that the performance of the proposed DWT-DMT system with the TEQ filter bank is better than that of the FFT-DMT system with the TEQ filter bank over the eight standard Carrier Serving Area (CSA) loops. The results show that employing the TEQ filter bank in the proposed DWT-DMT system can achieve high bit rates ranging from 2.899 Mbps to 5.369 Mbps.
Keywords
DMT System, DWT, FFT, TEQ.
