Acoustic Echo Cancellation from the Signal Using LMS Algorithm

The term Acoustic Echo Cancellation (AEC) refers to a process of removing echo from the received signal that contains one or more delayed signals (copies of the original signal). The primary step while cancelling an echo is to identify the transmitted signal which reappears with some delay. Once the echo is identified it is cancelled by subtracting from transmitted signal. Echo cancellation can be done using either echo suppressors or echo cancellers, or in some case both. But suppressors support only half duplex communication leading to the invention of echo cancellers which allows both the speakers to talk at the same time. This paper is concerned with Adaptive Acoustic Echo Cancellation Based on Least Mean Square (LMS) Algorithm. Here, we evaluate the performance of telecommunication systems like hands-free and teleconferencing systems which is affected by white noise.