Digital quadrature phase detection
Abstract
A system for detecting the phase of a frequency or 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. 6 figs.
- Inventors:
- Publication Date:
- Research Org.:
- Idaho National Engineering Lab., Idaho Falls, ID (USA)
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (USA)
- OSTI Identifier:
- 5772663
- Patent Number(s):
- PATENTS-US-A7395124
- Application Number:
- ON: DE91011625; PPN: US 7-395124
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- AC07-76ID01570
- Resource Type:
- Patent Application
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 47 OTHER INSTRUMENTATION; NONDESTRUCTIVE TESTING; INTERFEROMETRY; SIGNALS; PHASE SHIFT; COMMUNICATIONS; FIBER OPTICS; FREQUENCY CONVERTERS; FREQUENCY MODULATION; HETERODYNE RECEIVERS; INVENTIONS; ELECTRONIC EQUIPMENT; EQUIPMENT; MATERIALS TESTING; MICROWAVE EQUIPMENT; MODULATION; RADIO EQUIPMENT; TESTING; 420500* - Engineering- Materials Testing; 440800 - Miscellaneous Instrumentation- (1990-)
Citation Formats
Smith, J A, and Johnson, J A. Digital quadrature phase detection. United States: N. p., 1989.
Web.
Smith, J A, & Johnson, J A. Digital quadrature phase detection. United States.
Smith, J A, and Johnson, J A. Thu .
"Digital quadrature phase detection". United States.
@article{osti_5772663,
title = {Digital quadrature phase detection},
author = {Smith, J A and Johnson, J A},
abstractNote = {A system for detecting the phase of a frequency or 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. 6 figs.},
doi = {},
url = {https://www.osti.gov/biblio/5772663},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {8}
}