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US 2006/0217937 A1Published application
Reflectometer with echo canceller
OwnerChunming Han, Amod Dandawate +1inventors
InventorsChunming Han, Amod Dandawate, Xiao-Feng Qi
Life of this patent
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Abstract
Various embodiments are directed to a zero-echo canceling system adapted to at least partially cancel a received zero-echo by calculating an error signal as a difference between the zero-echo and a zero-echo canceling signal.
Claims20
A method of reducing a zero-echo comprising:
- combining a zero-echo canceling signal based on a transmitted pulse with a received zero-echo to reduce the received zero-echo;
- and
- calculating an error signal as a difference between the zero-echo and the zero-echo canceling signal.
An apparatus comprising:
- a zero-echo canceller to combine a zero-echo canceling signal based on a transmitted pulse with a received zero-echo to reduce the received zero-echo and to calculate an error signal as a difference between the zero-echo and the zero-echo canceling signal.
A system comprising:
- a transceiver coupled to a DSL line to be tested;
- a zero-echo canceller coupled to said transceiver, said zero-echo canceller to combine a zero-echo canceling signal based on a transmitted pulse with a received zero-echo to reduce the received zero-echo and to calculate an error signal as a difference between the zero-echo and the zero-echo canceling signal.
Dependencies are inferred from the claim text.