Pulse or digital communications – Repeaters – Testing
Patent
1989-08-17
1992-05-26
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
329327, 329304, 359191, H04L 2714
Patent
active
051174405
ABSTRACT:
A system for detecting the phase of a frequency of phase modulated signal that includes digital quadrature sampling of the frequency or phase modulated signal at two times that are one quarter of a cycle of a reference signal apart, determination of the arctangent of the ratio of a first sampling of the frequency or phase modulated signal to the second sampling of the frequency or phase modulated signal, and a determination of quadrant in which the phase determination is increased by 2.pi. when the quadrant changes from the first quadrant to the fourth quadrant and decreased by 2.pi. when the quadrant changes from the fourth quadrant to the first quadrant whereby the absolute phase of the frequency or phase modulated signal can be determined using an arbitrary reference convention.
REFERENCES:
patent: 4038540 (1977-07-01), Roberts
patent: 4057759 (1977-11-01), Genova et al.
patent: 4146841 (1979-03-01), McRae
patent: 4683578 (1987-07-01), Betts et al.
patent: 4689804 (1987-08-01), Srinivasagopalan et al.
patent: 4910465 (1990-03-01), Dillman
Smith et al. "Fiber Optic Sensing for NDE and Process Control", Society for Experimental Mechanics, Inc., 1989 pp. 788-793.
Johnson John A.
Smith James A.
Albrecht John M.
Bocure Tesfaldet
Moser William R.
Safourek Benedict V.
Smith Bradley W.
LandOfFree
Digital quadrature phase detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital quadrature phase detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital quadrature phase detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-425508