Title :
Crosstalk cancellation for hybrid fiber twisted-pair systems
Author :
Schmücking, D. ; Schenk, M. ; Wörner, A.
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. Munich, Germany
Abstract :
Broadband access over the existing telephone network can be provided by the deployment of hybrid fiber twisted-pair (HFTP) systems. For HFTP the twisted-pair cable has to be modelled as a vector channel with distributed transceivers on the subscriber side. The upstream transmission capacity can be increased by FEXT cancellation based on a 2 dimensional decision feedback equalizer (2-D-DFE). The achievable gain depends on the usable upstream bandwidth as well as on the background noise and can be more than 100 % for the transmission of 27.6 Mbit/s with a 16-QAM. About 15 feedback taps are required per FEXT canceller, resulting in 19000 gates for a gate array implementation in 0.35 μm technology
Keywords :
crosstalk; decision feedback equalisers; logic arrays; optical cables; optical fibre subscriber loops; quadrature amplitude modulation; telecommunication channels; twisted pair cables; 0.35 micron; 16-QAM; 27.6 Mbit/s; 2D DFE; FEXT cancellation; HFTP; background noise; broadband access; crosstalk cancellation; decision feedback equalizer; distributed transceivers; feedback tap; gain; gate array implementation; hybrid fiber twisted-pair systems; telephone network; twisted-pair cable; upstream bandwidth; upstream transmission capacity; vector channel; Additive white noise; Crosstalk; DSL; Decision feedback equalizers; Frequency; Gaussian noise; Hybrid fiber coaxial cables; ISDN; Optical fiber cables; Transceivers;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.585974
