New equalization approach for maximizing data rate in discrete multi tone systems

Abstract

This paper presents a new time domain equalizer (TEQ), which can be used in discrete multi-tone (DMT) systems to maximize the bit rate. The proposed TEQ is tested in the fast Fourier transform based discrete multi tone (FFT-DMT) system, and in a proposed discrete wavelet transform based discrete multi-tone (DWT-DMT) system. The objective of the proposed DW T-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 proposed TEQ is presented in the paper. Simulation experiments have been carried out to test the effect of the proposed TEQ with the FFT-DMT system and the proposed DW T-DMT system. The results of these experiments show that the performance of the DW T-DMT system with the proposed TEQ is better than the FFT-DMT system with this TEQ over the eight standard carrier serving area (CSA). The results also show that employing the proposed TEQ in the DW T-DMT system can achieve a high bit rate ranging from 2.899 Mbps to 5.369Mbps.

Performance Analysis of DWMT Transceiver for ADSL Channel with Overlap FDE in Presence of AWGN, Crosstalk and Impulse Noise

“…Few works are available in literature, which proposes various TDE and FDE techniques for wavelet based multi-carrier systems. These techniques are discussed in [9]- [12]. However, the equalization of DWMT modulation technique with less complexity and efficiency is still an open research area.…”

High Data Rate DMT SERDES Design

“…Typically this will also require some frequency domain equalization to account for remaining per sub-channel phase and gain mismatches. Examples can be found in [101,102,103,104,105].…”