Title :
Distance-gains by multiple-duplex transmission, coding, and shaping for HDSL
Author_Institution :
Lehrstuhl fuer Nachrichtentech., Erlangen-Nuernberg Univ., Germany
Abstract :
The maximum distance over which reliable high rate digital transmission over twisted pair lines is possible can be increased substantially by multiple-duplex transmission, channel coding, and signal shaping. Simple equations are derived to transform SNR (signal to noise ratio)-gains into distance gains. Numerical examples are given for a transmission of 2.048 Mb/s over twisted pairs with line diameters 0.4 mm and 0.6 mm (AWG 26 and AWG 22). A new signal shaping method without scrambling of data bits is proposed, by which a SNR-loss due to error multiplication in the descrambling procedure is avoided
Keywords :
channel coding; subscriber loops; twisted pair cables; 0.4 mm; 0.6 mm; 2.048 Mbit/s; HDSL; channel coding; distance gains; high rate digital transmission; multiple-duplex transmission; signal shaping; twisted pair lines; Channel coding; Copper; Crosstalk; DSL; Equations; Frequency; Optical feedback; Optical fiber networks; Optical receivers; Transforms;
Conference_Titel :
Communications, 1993. ICC '93 Geneva. Technical Program, Conference Record, IEEE International Conference on
Conference_Location :
Geneva
Print_ISBN :
0-7803-0950-2
DOI :
10.1109/ICC.1993.397594
