DocumentCode :
1985196
Title :
Nonlinear dynamics in adaptive echo cancellation
Author :
Sethares, William A. ; Mareels, Iven M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
fYear :
1989
fDate :
14-16 Aug 1989
Firstpage :
873
Abstract :
Adaptive hybrids are one way of canceling the echo path in telephone systems. A simplified model of an adaptive hybrid using two bifurcation parameters, the adaptive stepsize and the ratio of the two inputs, is illustrated. As these parameters vary, the system exhibits a wide variety of behaviors, including stable and unstable equilibrium points, stable and unstable periodic orbits, and aperiodic orbits. The underlying bifurcations include Hopf, flip, period-doubling sequences, and a degenerate global bifurcation which gives rise to some very complex dynamics
Keywords :
adaptive filters; echo suppression; telephone systems; Hopf sequences; adaptive echo cancellation; adaptive hybrid; adaptive stepsize; aperiodic orbits; bifurcation parameters; complex dynamics; degenerate global bifurcation; echo path; equilibrium points; flip sequences; period-doubling sequences; periodic orbits; telephone systems; Adaptive filters; Bifurcation; Chaos; Echo cancellers; Nonlinear equations; Orbits; Speech; Telephony; Transfer functions; Wire;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 1989., Proceedings of the 32nd Midwest Symposium on
Conference_Location :
Champaign, IL
Type :
conf
DOI :
10.1109/MWSCAS.1989.101994
Filename :
101994
Link To Document :
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