Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Patent
1991-08-08
1992-07-28
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
342159, G01S 1352
Patent
active
051344106
ABSTRACT:
A sensitivity velocity control program in a surveillance radar for distinguishing wanted moving targets from unwanted moving targets by processing radar target return data and having prestored evaluation criteria for accepting/rejecting the moving targets. The radar target return signals are processed to determine their true radial velocity and apparent radar cross section. The program evaluates these measurements based on a look-up table of preselected acceptable levels of minimum true radial velocity for each apparent radar cross section. The program declares a target acceptable when its radial velocity matches or exceeds the preselected minimum radial velocity for that radar cross section stored in a computer memory. The acceptance criteria relates to the type of target (aircraft, missile, bird, etc.) being accepted or rejected. In general, the criteria accepts large targets having low to high radial velocities. The smaller the apparent radar cross section of the target, the higher the true radial velocity must be for acceptance. The true radial velocity versus apparent radar cross section profile is intended to accept aircraft and missiles but reject birds.
REFERENCES:
patent: 4907001 (1990-03-01), Harmuth
"Radar Technology Applied to Air Traffic Control," William W. Shrader, IEE Transactions on Communications, vol. COM-21, No. 5, May 1973, pp. 591-605.
"Radar System Engineering," Louis N. Ridenour, Boston Technical Publishers, Inc., Lexington, Mass. 02173, 1964, p. 460, SEC. 12:8.
"Radar Handbook," Merrill I. Skolnik, Second Edition, McGraw-Hill Publishing Company, New York, N.Y., pp. 15.69-15.70.
Dawson Walter F.
Raytheon Company
Sharkansky Richard M.
Tubbesing T. H.
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