DSL noise cancellation
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United States of America Patent
Stats
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Nov 14, 2017
Issued Date -
N/A
app pub date -
Mar 4, 2009
filing date -
Mar 4, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus in a noise cancellation system that receives a noise reference signal via a noise reference signal input port, and performs at least one of procedures a and b set forth below for reducing noise in a DSL data signal transmitted on a DSL transmission line to which the noise cancellation system is coupled: a.i.) creating a noise free representation of a DSL synchronization symbol repeatedly occurring in the transmitted DSL data signal, and a.ii.) reducing the noise in the transmitted DSL data signal based on the noise free representation of the DSL synchronization symbol and the received noise reference signal, and b.i.) analyzing at least one of the received noise reference signal and the transmitted DSL data signal to identify one or more frequency bands in which to de-emphasize noise cancellation in the transmitted DSL data signal, and b.ii.) causing the noise cancellation system to de-emphasize noise cancellation in the identified one or more frequency bands of the transmitted DSL data signal, responsive to the analysis.
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Cited Art Landscape
Patent Citation Ranking
- 3 Citation Count
- H04L Class
- 11.47 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 14, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 14, 2029 |
