Adaptive impulse noise canceler for digital subscriber lines
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United States of America Patent
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-
Apr 25, 1995
Grant Date -
N/A
app pub date -
Oct 13, 1992
filing date -
Oct 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An impulse noise canceler includes circuitry which recognizes, locates, and cancels impulse noise when it occurs in an incoming signal. Impulse noise is characterized by a shape, an amplitude, and an arrival time, any or all of which may be unknown. In one implementation, adaptive circuitry is deployed to estimate the amplitude when it is the only unknown, and a replica of the impulse noise is generated and used to cancel the impulse noise in the incoming signal. In another implementation, both the arrival time and amplitude are estimated when they are unknowns, and a replica is again generated to cancel the original impulse noise. In yet another implementation, the shape, amplitude, and arrival time are all estimated of the impulse noise to produce the replica to cancel the original impulse noise.
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