| Paper: | SPCOM-P13.5 | ||
| Session: | DMT and xDSL | ||
| Time: | Friday, May 21, 15:30 - 17:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communications: Multi-Carrier, OFDM, and DMT Systems | ||
| Title: | PER TONE SHAPING FILTERS FOR DMT TRANSMITTERS | ||
| Authors: | Chun-Yang Chen; National Taiwan University | ||
| See-May Phoong; National Taiwan University | |||
| Abstract: | Discrete MultiTone (DMT) modulation has been widely adopted for wideband transmission over digital subscriber loop (DSL) channels. In the conventional DMT system, the transmitting filters are the DFT filters. DFT filters suffer from poor frequency responses. Hence the resulting transmit signal has a large spectral sidelobe and its power spectraldensity (PSD) decays at a rate of 1/f only. In this paper, wepropose a modified DMT scheme with improved transmitting filters.In the proposed system, shaping filters are applied to improve thefrequency responses of the transmitting filters. Moreover, anefficient implementation of the proposed system is derived.Experiment shows that for VDSL applications, the proposed systemhas a very satisfactory spectral efficiency. | ||
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