Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Patent
1993-12-23
1995-05-02
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Parameter related to the reproduction or fidelity of a...
455 673, 36472803, G01R 2700
Patent
active
054123259
ABSTRACT:
Three independent signal sources are used to statistically derive the power spectral density of the phase noise content of signals from each of them. This is accomplished by mixing each of the signals two at a time (i.e., signal one with signal two, signal one with signal three, and signal two with signal three) and capturing the resultant difference signals, such as with a waveform recorder, for example. A servo electronics loop is used to remove the carrier and any long term signal drift from the resultant difference signals. Statistical analysis is then used to compute the composite power spectral densities of the the resultant difference signals, and to solve for the individual power spectral densities of the original signals. The present system and method uses the mathematical relationships between the three sources that have similar magnitudes of phase noise, to compute the power spectral density of the noise content of signals from each source. The present system and method requires a minimum of interconnect hardware and only three inexpensive waveform recorders. Furthermore, the size, weight, and cost of producing the present phase noise test system is relatively low.
REFERENCES:
patent: 4748399 (1988-05-01), Caldwell
patent: 5053714 (1991-10-01), Durand
patent: 5172064 (1992-12-01), Walls
patent: 5179344 (1993-01-01), Najle
patent: 5180985 (1993-01-01), Zoccarato
Alkov Leonard A.
Denson-Low Wanda K.
Hughes Aircraft Company
Solis Jose M.
Wieder Kenneth A.
LandOfFree
Phase noise measurement system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Phase noise measurement system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase noise measurement system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1140188