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Title: Correction of I/Q channel errors without calibration

Abstract

A method of providing a balanced demodular output for a signal such as a Doppler radar having an analog pulsed input; includes adding a variable phase shift as a function of time to the input signal, applying the phase shifted input signal to a demodulator; and generating a baseband signal from the input signal. The baseband signal is low-pass filtered and converted to a digital output signal. By removing the variable phase shift from the digital output signal, a complex data output is formed that is representative of the output of a balanced demodulator.

Inventors:
 [1];  [1]
  1. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
874829
Patent Number(s):
6469661
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03D - DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
correction; iq; channel; errors; calibration; method; providing; balanced; demodular; output; signal; doppler; radar; analog; pulsed; input; adding; variable; phase; shift; function; time; applying; shifted; demodulator; generating; baseband; low-pass; filtered; converted; digital; removing; complex; data; formed; representative; output signal; input signal; phase shift; pass filter; /342/375/

Citation Formats

Doerry, Armin W, and Tise, Bertice L. Correction of I/Q channel errors without calibration. United States: N. p., 2002. Web.
Doerry, Armin W, & Tise, Bertice L. Correction of I/Q channel errors without calibration. United States.
Doerry, Armin W, and Tise, Bertice L. Tue . "Correction of I/Q channel errors without calibration". United States. https://www.osti.gov/servlets/purl/874829.
@article{osti_874829,
title = {Correction of I/Q channel errors without calibration},
author = {Doerry, Armin W and Tise, Bertice L},
abstractNote = {A method of providing a balanced demodular output for a signal such as a Doppler radar having an analog pulsed input; includes adding a variable phase shift as a function of time to the input signal, applying the phase shifted input signal to a demodulator; and generating a baseband signal from the input signal. The baseband signal is low-pass filtered and converted to a digital output signal. By removing the variable phase shift from the digital output signal, a complex data output is formed that is representative of the output of a balanced demodulator.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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Works referenced in this record:

The Correction of I and Q Errors in a Coherent Processor
journal, January 1981


Creating complex signal samples from a band-limited real signal
journal, May 1989