Method and apparatus for rapid identification of an unknown...

Details Method and apparatus for rapid identification of an unknown... Method and apparatus for rapid identification of an unknown...

G - Physics

01

R

G01R 31/28 (2006.01) H04B 3/23 (2006.01) H04L 25/02 (2006.01)

Patent

CA 2117035

In an apparatus for identifying an unknown system based on an echo signal, which includes multiple echoes, produced in response to a transmission input signal, a plurality of adaptive filters each of which has a plurality of taps, are supplied with the transmission signal in parallel to individually identify the multiple echoes by successively modifying tap coefficients in each adaptive filter. Information is transmitted from a j-th adaptive filter to a (j+1)-th adaptive filter to identify each of the multiple echoes. Each adaptive filter monitors the number of modification times of tap coefficients or an echo return loss enhancement (ERLE). Alternatively, a step size is changed from one to another to be delivered to tap coefficient generators and to accomplish high speed convergence.

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