A New Technique to Track Fast Moving Target by Digital Difference Signals From CW Doppler Radar

Marvin L. Rader, Herbert S. Kobayashi

Abstract:	In 1984 the Department of Transportation contacted NASA JSC for an Automotive Collision Avofdance System. Many systems were tested, including the monopulse radar. After testing, the monopulse radar was not recommended for Automotive Collisfon Avoidance use because of the following reasons : failure to work in clutter, too complex, too expensive, the data was not repeatable, could not implement an electronic scanning system,etc. However NASA JSC had been workfng with Police Type CW Doppler Radar for many years, and have three patents with many claims each. The Police Type CW Doppler will be presented because of the following reasons : highly accurate, low in cost, low power, works in clutter by filtering out stationary target and passing fast moving target, fast response, coherent detection,etc. This technique consists of three radars for tracking a target in the vertical and horizontal plane. Target center of the respective plane is indicated by a low difference so low difference in both planes indicates collision. Target above or below and right side or left side are indicated by plus or minus high differences. This technique. under the title Met hod and Apparatus for Measurfng Frequency and Phase Difference, is patented with the Patent Number 4.616.999, assfgnee United States of America as represented by NASA, the inventors are Herbert S. Kobayashi, Chrfstopher L. Lfchtenberg. Paul W. Shores (deceased), Allen R. Cunningham (deceased).
Published in:	Proceedings of the 46th Annual Meeting of The Institute of Navigation (1990) June 26 - 28, 1990 Atlantic City, NJ
Pages:	173 - 177
Cite this article:	Rader, Marvin L., Kobayashi, Herbert S., "A New Technique to Track Fast Moving Target by Digital Difference Signals From CW Doppler Radar," Proceedings of the 46th Annual Meeting of The Institute of Navigation (1990), Atlantic City, NJ, June 1990, pp. 173-177.
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