التعديل DMT هو الخيار الافضل لخطوط النقل الرقمية عالية السرعة VDSL

This paper explains reasons for choosing DMT modulation versus CAP modulation as a better option for a very high speed digital subscriber line VDSL. It also illustrates the role of DMT modulation in increasing data bit-rate by increasing data bandwidth in order to make the internet a universally accessible information superhighway and support the more demanding web-based applications, being potential sources of revenue. This paper also studies the essence of both modulations and the strengths, weaknesses of each; it includes an analysis of line conditions and other practical matters which explain why DMT is a better option for VDSL system setting. Finally, this paper also includes a simulation of transmitted DMT signal over digital subscriber line with and without filter, and an implementation of FMT (Filtered MultiTone modulation) system for FMT transmitter and receiver.