An adaptive for filter for echo cancelling using least squares with nonlinear optimal input design

摘要

The authors propose a new adaptive FIR filter algorithm for echo cancellation applications. The proposed algorithm differs from the conventional one by the construction of input signals in an optimal way using a nonlinear experiment design named the D-optimal experiment design. The advantages in using the proposed adaptive FIR echo canceller as an initialization process in the first phase Of each telephone call are demonstrated through simulation results. With respect to the obtained results, the D-optimal input sequence Should be adapted properly to he changes in the telephone network Topology caused by any new line connection.