1. Introduction
Acoustic echo cancellation (AEC) has received significant attention for several decades [1], [2], [3], [4]. The goal of AEC is to cancel echo caused by playback or far-end speech and transmit only the near-end speech to the far end. Though many algorithms have been proposed in literature [3], [4], it remains a challenging problem, especially in conditions with continuously changing echo-paths in low signal-to-echo ratio (SER) and signal-to-noise ratio (SNR).