An Improved Variable Step-size Affine Projection Sign Algorithm for Echo Cancellation

TL;DR

This paper introduces an enhanced variable step-size affine projection sign algorithm for echo cancellation, improving robustness to impulse interference and tracking of echo path changes through a novel energy recovery method.

Contribution

The paper presents a new VSS-APSA algorithm that improves robustness and tracking ability by incorporating near-end signal energy recovery.

Findings

Enhanced robustness to impulse interference

Improved tracking of echo path changes

Better convergence performance

Abstract

This paper proposes an improved variable step-size (VSS) algorithm for the recently introduced affine projection sign algorithm (APSA) based on the recovery of the near-end signal energy in the error signal. Simulation results demonstrate that, compared to the previous VSS for APSA, the proposed approach provides both more robustness to impulse interference and better tracking ability of echo path change.