Communications: directive radio wave systems and devices (e.g. – With particular circuit – For pulse modulation
Patent
1997-11-12
1998-12-22
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For pulse modulation
342101, 342134, G01S 728
Patent
active
058524185
ABSTRACT:
A notched-chirp generator (20), utilizing first and second chirp generators (28, 30), a functional conversion element (40), an antichirp generator (42), a summing element (64), and a translation element (66), generates a notched-chirp signal (24). The second chirp generator (30) generates a second chirp phase signal (.phi..sub.C1), is translated by the functional conversion element (40) into an oscillating antichirp signal (A.sub.O1). The antichirp generator (42) generates an antichirp signal (A.sub.1) by scaling, weighting, and cyclically positioning the oscillating antichirp signal (A.sub.O1). The summing element (64) sums the antichirp signal (A.sub.1) with a first chirp phase signal (.phi..sub.C0), generated by the first chirp generator (28), to produce a notched-chirp phase signal (.phi..sub.N), which is converted by the translation element (66) into a notched-chirp signal (24) having a notch (26) positioned at a specific frequency (f.sub.N) determined by the antichirp signal (A.sub.1)
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Ferrell Bruce H.
Woody William C.
Gresham Lowell W.
Lockheed Martin Corporation
Meschkow Jordan M.
Sotomayor John B.
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