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Digital-Difference Processing For Collision Avoidance.Digital system for automotive crash avoidance measures and displays difference in frequency between two sinusoidal input signals of slightly different frequencies. Designed for use with Doppler radars. Characterized as digital mixer coupled to frequency counter measuring difference frequency in mixer output. Technique determines target path mathematically. Used for tracking cars, missiles, bullets, baseballs, and other fast-moving objects.
Document ID
19880000161
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Shores, Paul
(NASA Lyndon B. Johnson Space Center, Houston, Tex.)
Lichtenberg, Chris
(NASA Lyndon B. Johnson Space Center, Houston, Tex.)
Kobayashi, Herbert S.
(NASA Lyndon B. Johnson Space Center, Houston, Tex.)
Cunningham, Allen R.
(NASA Lyndon B. Johnson Space Center, Houston, Tex.)
Date Acquired
August 13, 2013
Publication Date
March 1, 1988
Publication Information
Publication: NASA Tech Briefs
Volume: 12
Issue: 3
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
MSC-20865
Accession Number
88B10161
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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