Method and apparatus capable of quickly identifying an unknown system even on occurrence of a plurality of dispersive portions
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United States of America Patent
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-
Oct 3, 1995
Grant Date -
N/A
app pub date -
Mar 7, 1994
filing date -
Mar 5, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an identification apparatus for identifying an unknown system in response to a transmission input signal and an echo signal which includes multiple echoes sent through the unknown system, 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 modification times of tap coefficients or 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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