초록 ▼

A radar detection and imaging system provides for the simultaneous imaging of the stationary objects on the earth's surface and the detection and imaging of moving targets. The radar system includes at least one transmitting aperture and a plurality of receiving apertures that are simultaneously ope

A radar detection and imaging system provides for the simultaneous imaging of the stationary objects on the earth's surface and the detection and imaging of moving targets. The radar system includes at least one transmitting aperture and a plurality of receiving apertures that are simultaneously operated in a synthetic aperture radar (SAR) mode caused by the motion of the satellite or airborne platform on which they are mounted. Each receiving aperture is connected to its own coherent receiver and the digitized signals from all receivers are processed to image both stationary clutter and moving targets. The system employs space-time adaptive processing (STAP) algorithms to better compensate for channel mismatches, better suppress stationary clutter, and to suppress mainbeam jamming. Moving target detection and estimation modules are also included and are their performance is improved as a result of the STAP algorithms. The system also employs SAR processing algorithms to create high-resolution images of stationary objects, and to image moving targets. The SAR and STAP algorithms are uniquely integrated in the radar signal processor (RSP) to provide improved performance while reducing the computational requirements, facilitating real-time implementation.

대표청구항 ▼

1. A radar system comprising:at least one transmitting antenna connected to a pulsed radio frequency generator; a plurality of receiving antennas; a plurality of receivers connected to respective ones of said receiving antennas; a plurality of signal delays, each of said receivers being operatively

1. A radar system comprising:at least one transmitting antenna connected to a pulsed radio frequency generator; a plurality of receiving antennas; a plurality of receivers connected to respective ones of said receiving antennas; a plurality of signal delays, each of said receivers being operatively connected to at least one of said signal delays to produce a plurality of delayed incoming radar signals in respective pseudochannels; a plurality of synthetic aperture radar (SAR) modules operatively connected to said receivers and said delays for operating on signals from said receivers and from said signal delays to produce a plurality of SAR-processed signals; a systems formation module coupled to outputs of said SAR modules for forming or selecting at least one grouping of said SAR-processed signals; and at least one moving target indication (MTI) module connected to said systems formation module for performing clutter suppression operations on said grouping of said SAR-processed signals.