Title :
Dynamics limited shaping for fast digital transmission
Author :
Fischer, Robert F H ; Huber, Johannes B.
Author_Institution :
Lehrstuhl fur Nachrichtentech., Erlangen-Nurnberg Univ., Germany
Abstract :
A new combined precoding/shaping technique for fast digital transmission is proposed. Major advantages of this “dynamics shaping” are: dynamics of the signal at the input of the decision device are reduced by a great amount. Thereby, A/D-conversion, adaptive equalization, and symbol timing are rather facilitated. A trade-off between signal dynamics at the transmitter output, decision device input and the SNR-gain by noise whitening is offered. For dynamics limitation relevant in practice, gains up to 6 dB are achieved. Nevertheless, system complexity is lower than in other precoding/shaping techniques. Numerical results are presented for a HDSL application in the German Telekom subscriber network
Keywords :
adaptive equalisers; communication complexity; digital communication; encoding; interference (signal); pulse amplitude modulation; signal processing; subscriber loops; synchronisation; white noise; 6 dB; A/D-conversion; German Telekom subscriber network; HDSL application; PAM; adaptive equalization; combined precoding/shaping technique; decision device; dynamics limitation; dynamics limited shaping; fast digital transmission; gains; noise whitening; signal dynamics; symbol timing; system complexity; Adaptive equalizers; Baseband; Blind equalizers; Decision feedback equalizers; Finite impulse response filter; Intersymbol interference; Matched filters; Nonlinear filters; Signal to noise ratio; Transmitters;
Conference_Titel :
Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2486-2
DOI :
10.1109/ICC.1995.525132
