Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1973-11-23
1976-01-27
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5DP, G01S 944
Patent
active
039355721
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.
REFERENCES:
patent: 3646554 (1972-02-01), Fierston et al.
patent: 3688313 (1972-08-01), Kern
Broniwitz Laurence E.
Landau Mark I.
Pearson, III John B.
Adam Walter J.
Hughes Aircraft Company
MacAllister W. H.
Tubbesing T. H.
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