Title :
Residual noise reduction in sign algorithm
Author_Institution :
Fac. of Electr. Eng., Ljubljana Univ., Slovenia
Abstract :
The residual noise of the sign algorithm can be reduced by adding a uniformly distributed noise (dithering) to the sign algorithm input signal. In this paper, a simple equation for the residual noise reduction factor (RNRF) is derived for the case in which the noise in the sign algorithm input signal has a two-level discrete amplitude distribution. It is demonstrated that the RNRF is proportional to the ratio between the amplitude of the input noise and the adaptation step.
Keywords :
adaptive signal processing; echo suppression; iterative methods; noise; RNRF; adaptation step; amplitude; dithering; input noise; residual noise reduction factor; sign algorithm input signal; two-level discrete amplitude distribution; uniformly distributed noise; Analytical models; Echo cancellers; Echo interference; Equations; Iterative algorithms; Noise cancellation; Noise level; Noise reduction; Probability distribution; Signal to noise ratio;
Journal_Title :
Signal Processing Letters, IEEE
