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Implementation of Crosstalk-Resistant Adaptive Decorrelator using Labview

Katta Prathyusha, MSPradeep Kumar Patnaik

In this paper we designed an adaptive decorrelator which is based on two cross coupled least-mean square algorithms. This decorrelator is used to remove the crosstalk which may occur during echo in telephone networks, while two or more persons talking at the same time. This paper deals with separation of two sound (voice) signals which are mixed in real environment. This separation is done by decorrelating cross coupling transfer functions which link the two sound signals. The decorrelator is implemented using LabVIEW, since it is convenient for implementing such algorithms. Here LMS algorithm starts with weight vector zero and iteration continues till the error is minimized. This work has application in smart phones, hearing aid systems and speech recognition systems.