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Title: 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:
OSTI Identifier:
7273548
Patent Number(s):
US 5117440; A
Application Number:
PPN: US 7-395124
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-082931
DOE Contract Number:
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Patent File Date: 17 Aug 1989
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; SIGNALS; DIGITAL FREQUENCY ANALYSIS; DATA PROCESSING; DIGITAL CIRCUITS; RESOLUTION; ELECTRONIC CIRCUITS; FREQUENCY ANALYSIS; PROCESSING; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)

Citation Formats

Smith, J.A., and Johnson, J.A. Digital quadrature phase detection. United States: N. p., 1992. Web.
Smith, J.A., & Johnson, J.A. Digital quadrature phase detection. United States.
Smith, J.A., and Johnson, J.A. Tue . "Digital quadrature phase detection". United States. doi:.
@article{osti_7273548,
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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 26 00:00:00 EDT 1992},
month = {Tue May 26 00:00:00 EDT 1992}
}