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:
-
- 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}
}
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Works referenced in this record:
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conference, January 1997
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- Radar Systems (RADAR 97)
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Creating complex signal samples from a band-limited real signal
journal, May 1989
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