Choice of a finiteaccuracy echocancelling algorithm
Abstract
A classical gradient echocancelling algorithm and an algorithm which uses only the sign of the error are compared quantitatively in terms of residualecho (RE) level, complexity of finiteaccuracy computations, and speed of convergence. Simulation results are presented graphically and discussed. The sign algorithm is shown to have lower total complexity than the gradient algorithm and to exhibit similar RE and binarywordlength behavior when controlled forced noise is added. If its lower convergence speed is corrected for by introducing a learning phase (without forced noise) and a variableincrementation step (during the permanent phase), the lower complexity of the sign algorithm makes it superior.
 Publication:

Annales des Telecommunications
 Pub Date:
 August 1983
 Bibcode:
 1983AnTel..38..305B
 Keywords:

 Adaptive Filters;
 Digital Techniques;
 Echo Suppressors;
 Accuracy;
 Algorithms;
 Binary Digits;
 Computerized Simulation;
 Convergence;
 Communications and Radar