Correction of I/Q channel errors without calibration

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874829

Doerry, Armin W ^[1]; Tise, Bertice L ^[1]

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1. Albuquerque, NM

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 6469661
• OSTI ID: 874829
• Country of Publication: United States
• Language: English

Related Subjects

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
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