Title: System for resolving velocity ambiguity in pulse-doppler radar

Abstract: A pulse-doppler radar tracking system is disclosed employing four filter channels for tracking range, velocity, azimuth and elevation. Each channel is mechanized in a Kalman filter form by a stored program in a digital computer. The range channel estimates target range, R.sub.TPR, range rate, V.sub.TPV and acceleration a.sub.TPV from one of many received signal frequency spectra at multiples of the pulse repetition frequency (PRF). Once error in the range rate estimate, V.sub.TPR, is within a velocity corresponding to .lambda. PRF/4, the velocity channel is reinitialized in its estimate of target velocity, V.sub.TPV, with a corrected velocity computed from the less accurate but unambiguous estimate of velocity, V.sub.TPR, and the ambiguous estimate of velocity, V.sub.TPV.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Broniwitz, Laurence E. (Los Angeles, CA, US)
Landau, Mark I. (Los Angeles, CA, US)
Pearson, III, John B. (Santa Monica, CA, US)

Application Number: 418692
Filing Date: 1973-11-23
Publication_date: 1976-01-27
Assignee: Hughes Aircraft Company (Culver City, CA)
Primary Class(es): 342/80 342/67, 342/95, 342/99, 342/107
Other Classes:
US Patent Ref:

3646554	Feb, 1972	Fierston et al.	343/5.
3688313	Aug, 1972	Kern	343/9.

Other Refs:
Primary Examiner: Tubbesing, T. H.
Assistant Examiner:
Attorney: MacAllister; W. H., Adam; Walter J.