Title :
Wideband digital subscriber access with multidimensional block modulation and decision-feedback equalization
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
28 Nov-1 Dec 1988
Abstract :
The potential transmission performance of pair-wire subscriber lines at the rate of 800 kb/s is investigated. Block modulation schemes of one to four dimensions, at 2 bits/dimension, are considered. The multiple dimensions are multiplexed together using time division multiplexing. The environmental noise is assumed to be dominated by near-end crosstalk. Computer simulation shows that the coding gain of a multidimensional modulation scheme is fully preserved after transmission if the equalizer is long. However, the gain can be much lower, or none at all, if the equalizer is short and hence unable to whiten the decision-point noise sufficiently
Keywords :
ISDN; broadband networks; decision theory; feedback; modulation; subscriber loops; time division multiplexing; 800 kbit/s; ISDN; coding gain; computer simulation; decision-feedback equalization; decision-point noise; environmental noise; multidimensional block modulation; near-end crosstalk; pair-wire subscriber lines; time division multiplexing; wideband digital subscriber access; Computer simulation; Crosstalk; Decision feedback equalizers; Digital modulation; Filters; Frequency; Multidimensional systems; Time division multiplexing; Wideband; Working environment noise;
Conference_Titel :
Global Telecommunications Conference, 1988, and Exhibition. 'Communications for the Information Age.' Conference Record, GLOBECOM '88., IEEE
Conference_Location :
Hollywood, FL
DOI :
10.1109/GLOCOM.1988.25948
