Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-10-30
2007-10-30
West, Jeffrey R. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S077000
Reexamination Certificate
active
11634649
ABSTRACT:
An apparatus and method to decompose measured phase jitter into a deterministic component and a random component. After filtering a time-domain measured phase jitter signal, a discrete Fourier transform is applied, followed by squaring. A density function is formed from the square of the discrete Fourier transform, from which a noise floor is estimated. The frequency-domain phase jitter is processed by zeroing out those frequency components having a magnitude equal to or less than the noise floor, and the remaining frequency components are processed by subtracting out a pseudo-random sequence having a magnitude equal to the noise floor and having a uniformly distributed phase. This processing provides an estimate of the deterministic component in the frequency domain, and an inverse discrete Fourier transform may be applied to transform into the time domain to yield an estimate of the deterministic component of the phase jitter in the time domain.
REFERENCES:
patent: 6799144 (2004-09-01), Li et al.
patent: 6832172 (2004-12-01), Ward et al.
patent: 7203610 (2007-04-01), Tabatabaei et al.
patent: 2002/0075951 (2002-06-01), Pearson
patent: 2003/0115017 (2003-06-01), Sun et al.
patent: 2005/0080574 (2005-04-01), Draving
patent: 2005/0111536 (2005-05-01), Cranford et al.
patent: 2005/0152488 (2005-07-01), Buckwalter et al.
patent: 2005/0163204 (2005-07-01), Brewer
patent: 2005/0286627 (2005-12-01), Tabatabaei
patent: 2006/0045175 (2006-03-01), Draving et al.
patent: 2006/0093027 (2006-05-01), Draving et al.
patent: 2006/0161361 (2006-07-01), Tabatabaei
patent: 2006/0251200 (2006-11-01), Miller
LandOfFree
Jitter decomposition for high speed serial interfaces does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Jitter decomposition for high speed serial interfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jitter decomposition for high speed serial interfaces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3881085