Pulse or digital communications – Testing – Signal noise
Reexamination Certificate
2011-07-12
2011-07-12
Phu, Phuong (Department: 2611)
Pulse or digital communications
Testing
Signal noise
C375S284000, C375S285000, C375S346000, C375S228000, C375S257000, C379S416000, C702S069000
Reexamination Certificate
active
07978756
ABSTRACT:
Systems and methods for monitoring impulse noise are described. At least one embodiment is a method, which comprises detecting whether impulse noise is present and in response to detecting the presence of impulse noise, performing time domain analysis to determine whether one or more impulse noise sources are present based on minimum interarrival time and maximum impulse length. The method further includes performing frequency domain analysis to estimate frequencies associated with the one or more impulse noise sources and based on the time domain analysis and frequency domain analysis, providing a total number of impulse noise sources and frequencies associated with the impulse noise sources. In this regard, the embodiments described herein provide dual-speed monitoring of impulse noise in the form of short-term and long-term monitoring. The use of dual-speed monitoring ensures that dynamic changes in the impulse noise environment are quickly addressed and also ensures better characterization of multiple impulse noise sources in order to provide better impulse noise protection.
REFERENCES:
patent: 6885730 (2005-04-01), Bremer et al.
patent: 7027405 (2006-04-01), Khadavi et al.
patent: 7031381 (2006-04-01), Betts et al.
patent: 7106833 (2006-09-01), Kerpez et al.
patent: 7263174 (2007-08-01), Schmidt et al.
patent: 7274746 (2007-09-01), Bailey et al.
patent: 7443916 (2008-10-01), Sedarat et al.
patent: 2006/0253515 (2006-11-01), Sedarat
Draft Amendment 2 to International Telecommunications Union (ITU-T), “Recommendation G.993.2, Very High Speed Digital Subscriber Line transceivers 2 (VDSL2)”, Section 11.4.2.2, pp. 15-20, 2007.
“G.gen: G.vdsl: ADSL: Impulse Noise Monitoring: Performance Requirements”, Source: Alcatel-Lucent, Document No: BF-070, Contribution to ITU-T, Bordeaux, France, Dec. 3-7, 2007.
“ADSL: G.ADSL: Virtual Noise is required for ADSL2plus”, Source: BT, Document No: RJ-043, Contribution to ITU-T, Red Bank, New Jersey, Oct. 8-12, 2007.
“ADSL: Erasure Decoding for ADSL”, Source: Conexant Systems, Inc, Document No: BF-094, Contribution to ITU-T, Bordeaux, France, Dec. 3-7, 2007.
US Statutory Invention Registration H1726, May 5, 1998, Chen.
Varshney et al, “Radar Signal detection and estimation using time-frequency distributions”, Syracuse University, NY, Oct. 1995.
Der-Jenq Liu et al, “Fundamental frequency Estimation Based on the Joint Time-Frequency analysis of harmonic Spectral Structure”, IEEE Transactions of Speech and Audio processing, vol. 9, No. 6, Sep. 2001.
Papandreou A. et al, “Detection and estimation of generalized chirps using time-frequency representations”, Signals, Systems and Computers, 1994 Conference Record of the Twenty-Eighth Asilomar Conference on vol. 1, Issue , 31 Oct. 2, Nov. 1994 pp. 50-54 vol. 1.
Day Robert A.
Duvaut Patrick
Garg Rahul
Levonas Robin
Mahadevan Amitkumar
Ikanos Communications Inc.
Phu Phuong
Thomas Kayden Horstemeyer & Risley LLP
LandOfFree
Systems and methods for monitoring impulse noise does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for monitoring impulse noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for monitoring impulse noise will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2695461