Design Realization and Performance Evaluation of an Acoustic Echo Cancellation (aec) in Hands-free Communications Using Recursive Adaptive Algorithm

Nowadays, in the field of communications, AEC (acoustic echo cancellation) is truly essential with respect to the quality of multimedia transmission. In this paper, we designed and developed an efficient AEC based on adaptive filters to improve quality of service in telecommunications against the phenomena of acoustic echo, which is indeed a problem in hands-free communications. The main advantage of the proposed algorithm is its capacity of tracking non-stationary signals such as acoustic echo. In this work the acoustic echo cancellation (AEC) is modeled using a digital signal processing technique especially Simulink Blocksets. The algorithm’s code is generated in Matlab Simulink programming environment. At simulation level, results of simulink implementation prove that module behavior is realistic when it comes to cancellation of echo in hands free communication using adaptive algorithm. Results obtained with our algorithm in terms of ERLE criteria are confronted to IUT-T recommendation G.168.