24 November 1995 Performance analysis of QAM-VADSL systems for FTTC networks
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Proceedings Volume 2609, Hybrid Fiber-Coax Systems; (1995) https://doi.org/10.1117/12.227272
Event: Photonics East '95, 1995, Philadelphia, PA, United States
Abstract
Digital transport capabilities to a home served by a fiber-to-the-curb network are limited by the transmission characteristics of the twisted-pair drop cable. However, advanced digital signal processing techniques can substantially increase the data transmission capability over the relatively short lengths of these metallic sections. The purpose of this study is to estimate the maximum achievable information rate versus drop cable length (between 100 to 500 meters), when very high rate asymmetric digital subscriber line (VADSL) modems, with a QAM modulation technique, are used. Different QAM constellations have been analyzed and two types of disturbances have been considered: far-end crosstalk (FEXT) and additive white Gaussian noise (AWGN). Simulation results show that FEXT is a greater impairment than AWGN, and that a 16-QAM constellation outperforms any other number.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pedro M. Crespo, Javier Garcia-Frias, "Performance analysis of QAM-VADSL systems for FTTC networks", Proc. SPIE 2609, Hybrid Fiber-Coax Systems, (24 November 1995); doi: 10.1117/12.227272; https://doi.org/10.1117/12.227272
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