Digital Signal Processing

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Wavelet Transform for Performance Enhancement of Discrete Multi-Tone Systems


Affiliations
1 Jazan University, Saudi Arabia
2 Helwan University, Cairo, Egypt
3 Menoufia University, Menou, Egypt
4 Menoufia University, Egypt
5 Dept. Electronics and Electrical Communications, Menoufia University, Egypt
6 Menoufia University, Menouf, Egypt
     

   Subscribe/Renew Journal


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.
User
Subscription Login to verify subscription
Notifications
Font Size

Abstract Views: 156

PDF Views: 8




  • Wavelet Transform for Performance Enhancement of Discrete Multi-Tone Systems

Abstract Views: 156  |  PDF Views: 8

Authors

Samir Abd Elghafar
Jazan University, Saudi Arabia
Salaheldin M. Diab
Helwan University, Cairo, Egypt
Bassiouny M. Sallam
Menoufia University, Menou, Egypt
S. El-Rabaie
Menoufia University, Egypt
Moawad I. Dessouky
Dept. Electronics and Electrical Communications, Menoufia University, Egypt
Fathi E. Abd El-Samie
Menoufia University, Menouf, Egypt

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.