Raytheon Company

Other

Mary Krikorian

Robert A Rosen

Kapriel V Krikorian

A process for detecting and discriminating a particular target, such as an ambulating human, amidst an environment crowded with other objects or humans having similar doppler profiles to the desired target. A method according to one embodiment includes generating an initial radar image corresponding to a received doppler profile of a target, and generating a matched filter signal corresponding to the received doppler profile. The matched filter signal is correlated with subsequently received radar images to detect and discriminate the target.

Dismount step discrimination with temporal adaptive matched filtering of doppler spectral features

A process for detecting the harmonic motion characterizing a desired target. An exemplary method includes generating a radar image of the target utilizing a pulse doppler radar. A plurality of matched filter signals are generated in the receiver, each matched filter signal corresponding to a doppler profile of harmonic acceleration for the desired target. The matched filter signals are generated by an array of matched filters, with each matched filter signal corresponding to a predetermined doppler profile. The received radar image is then correlated to the matched filter signals to detect the desired target.

Dismount harmonic acceleration matched filtering for enhanced detection and discrimination

A system and method for concurrently operating a plurality of agile beam radar modes by pulse-to-pulse interleaving groups of the radar modes. Radar modes are grouped, each radar mode being allocated a certain amount of time for operation and a suitable pulse repetition frequency to improve or optimize the duty cycle of the antenna while concurrently operating the plurality of modes. Priorities may be assigned to groups or to individual radar modes within each group. In some embodiments, TDM communications are further interleaved within the radar modes to enhance the operation of the radar antenna.

Agile beam pulse to pulse interleaved radar modes

Target detection in the presence of non stationary clutter is improved by a radar receiver on a moving platform for detecting a target using a plurality of short coherent arrays and a plurality of long coherent arrays synthesized from the short coherent arrays overlapping the target. The target is obscured by slow scale clutter and fast scale clutter in the vicinity of the target. The radar receiver has a plurality of subapertures overlapping to acquire radar returns reflected from the target during the arrays, an analog to digital converter for each of the subapertures to convert the radar returns into digital radar returns for a plurality of range bins covering the target, the slow scale clutter and the fast scale clutter; and a digital computer for performing steps of SAR image creation, further enhanced by thresholding short array magnitude data, computing a time domain component of threshold filters using the thresholded short array magnitude data then coherently subtracting the time domain component of threshold filters from the short arrays, and using the result to synthesize long coherent arrays. A Space Time Adaptive Algorithm (STAP) is applied to the long coherent arrays thus obtained to suppress slow and stationary clutter. The short coherent arrays are between 10 and 400 milliseconds long. The long coherent arrays are between 400 and 4000 milliseconds long.

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Calabasas, CA, United States of America

Mary Krikorian