The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2004
Filed:
Oct. 29, 1999
Youssef Abdelilah, Holly Springs, NC (US);
Gordon Taylor Davis, Chapel Hill, NC (US);
Dongming Hwang, Cary, NC (US);
Malcolm Scott Ware, Raleigh, NC (US);
Hua Ye, Durham, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Methods, systems and computer program products for averaging measured levels from differing frame intervals based on a digital impairment pattern associated with the frame intervals are provided. Measured levels from frame intervals with the same digital impairment pattern may be averaged together and the measured levels replaced with the average. By averaging frame intervals based on a digital impairment pattern, the present invention may reduce the impact of noise by increasing the signal to noise ratio of the levels utilized for constellation generation. The use of the digital impairment patterns for determining which frame intervals to average may reduce the likelihood that digital impairments will corrupt the average by, for example, collapsing measured levels from one code point onto another code point. If the frame intervals have the same digital impairment pattern then it is likely that the differences in the values of the in the measured levels of the frame intervals are the result of random noise rather than digital impairments and, therefore, may be averaged together to reduce the impact of the random noise.