Digital quadrature phase detection
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.
 Inventors:

 Idaho Falls, ID
 Issue Date:
 Research Org.:
 EG & G IDAHO INC
 OSTI Identifier:
 868317
 Patent Number(s):
 5117440
 Assignee:
 United States of America as represented by United States (Washington, DC)
 Patent Classifications (CPCs):

H  ELECTRICITY H04  ELECTRIC COMMUNICATION TECHNIQUE H04L  TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
 DOE Contract Number:
 AC0776ID01570
 Resource Type:
 Patent
 Country of Publication:
 United States
 Language:
 English
 Subject:
 digital; quadrature; phase; detection; detecting; frequency; modulated; signal; sampling; times; quarter; cycle; reference; apart; determination; arctangent; ratio; quadrant; increased; changes; fourth; decreased; whereby; absolute; determined; arbitrary; convention; phase modulated; quadrature phase; modulated signal; reference signal; phase modulate; digital quadrature; /375/329/359/
Citation Formats
Smith, James A, and Johnson, John A. Digital quadrature phase detection. United States: N. p., 1992.
Web.
Smith, James A, & Johnson, John A. Digital quadrature phase detection. United States.
Smith, James A, and Johnson, John A. Wed .
"Digital quadrature phase detection". United States. https://www.osti.gov/servlets/purl/868317.
@article{osti_868317,
title = {Digital quadrature phase detection},
author = {Smith, James A and Johnson, John A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}