Echo Cancellation Using NLMS Adaptive Algorithm

-This paper presents the Cancellation of an acoustic echo. Such echo canceller is essential to control the echoes generated by the acoustic coupling between the microphone and loudspeaker in hands free telephones or teleconferencing applications. Conventional acoustic echo canceller encounters problems like slow convergence rate (especially for speech signal) and high computational complexity as the identification of the echo path requires filter with more than a thousand taps. In short the NLMS technique allows high quality acoustic echo cancellation whilst maintaining reasonable computational burden for low cost applications. This is especially the case when the acoustic echo path increases in length.