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AssigneeHoneywell International Inc.
InventorsJames R. Hager, Thomas W. Heidemann, Thomas R. Jicha
Estimating the term…
A method for calculating a center frequency and a bandwidth for a radar doppler filter is herein described. The center frequency and bandwidth are calculated to provide radar performance over varying terrain and aircraft altitude, pitch, and roll. The method includes receiving an antenna mounting angle, a slant range, and velocity vectors in body coordinates, calculating a range swath doppler velocity, a track and phase swath bandwidth, and a phase swath doppler velocity. The method continues by calculating a range swath center frequency based on the range swath doppler velocity, calculating a phase swath center frequency based on the phase swath doppler velocity, and calculating a level and verify swath bandwidth based upon the track and phase swath bandwidth.
A method for calculating a center frequency and a bandwidth for a radar doppler filter, the center frequency and bandwidth calculated to provide radar performance over varying terrain and aircraft altitude, pitch, and roll by keeping a doppler swath centered in an antenna beam, said method comprising:
A processor configured to:
A swath band pass filter, said filter comprising a first order filter, said filter configured to center on a doppler frequency and operate according to Eo=(A0/B0)×En−(A0/B0)×En×Z−2−(B1/B0)×Eo×Z−1(B2/B0)×Eo×Z−2, where En is an input signal, A0 is 2×Fs×Wb, B0 is (4×Fs2)+(2×Fs×Wb)+(Wl×Wu), B1 is (2×Wl×Wu)−(8×Fs2), and B2=(4×Fs2)−(2×Fs×Wb)+(Wl×Wu), and Wb=2πB, a bandwidth in radians, Wu=2π×(Fc+B/2), an upper 3 db point of said filter in radians, and Wl=2π×(Fc−B/2), a lower 3 db point of said filter in radians.
A radar signal processing circuit comprising:
A method for centering a doppler swath within an antenna beam, said method comprising:
Dependencies are inferred from the claim text.