Abstract: A Radar Digital Data Processor has been developed which produces I (phase) and Q (quadrature) data obtained by sampling the receiver IF of a radar with a single A/D converter. A sampling technique was developed for this application to allow operation with radars employing a noncoherent transmitter such as a magnetron. Representative field results are presented employing spectral analysis proving the viability of the sampling technique for Doppler processing.

Abstract: In a target detection communication system, apparatus and method for determining the presence of probable targets based on contacts (which can indicate the presence of a target, noise, chatter, or objects not of interest) detected within a predefined position sector or sectors over a specified number of scans. The position of each detected contact, as a contact of interest, is compared with the positions of contacts detected at previous times or scans. Velocity profiles indicate which previous contacts support the likelihood that the contact of interest represents a target having a velocity within a defined band. The likelihood, which can be represented by a quality value, may be a function of number of contacts, timing of contacts, or both the number and timing of contacts in a given velocity profile. A preselected threshold value, which is related to false alarm rate, is compared to the most likely, or highest quality, velocity profile associated with a contact of interest.

Abstract: The present invention relates to a two-dimensional radar video converter vided with an adaptive video processor using, in series, azimuth integration, mean level detection, and batch/batch correlation for target detection. The radar video converter also includes a computer interface module which selects from a plurality of threshold levels the signal thresholds to be exceeded in detecting targets in a particular radar environment. Together, the adaptive video processor and the computer interface module convert raw radar video into useful data which can be entered into a computer or used to display target detections at a convenient output.