Echo tail canceller based on AIFIR filtering.

Anis Ahmed. Abousaada
This thesis contributes a computationally efficient echo tail canceller. The proposed structure is an adaptive version of the Interpolated FIR (IFIR) filter. The results obtained with this new approach are compared to those obtained with an AFIR direct form echo canceller. The proposed system requires approximately 31% of the hardware of the AFIR echo canceller. A two-stage echo canceller utilized in the U-interface at Basic Rate Access-ISDN is investigated. The first stage (Main Echo Canceller)...
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