Title :
A signal processing architecture for space-based GMTI radar
Author :
Rabideau, Daniel J. ; Kogon, Stephen M.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Abstract :
Ground moving target indicator (GMTI) radars detect and classify targets with low velocities. Placing such radars in the Earth´s orbit can provide wide area coverage with high revisit rates. However, because of the radar´s large footprint (on the ground) and high velocity, target signals must compete with extremely intense nearby clutter. Requirements on antenna aperture, bandwidth, coverage rate, and computational complexity all play significant roles in shaping the radar´s signal processing chain. This paper describes a signal processing architecture that rejects interference. By addressing issues such as aperture configuration, bandwidth-induced decorrelation, adaptive training, and degree-of-freedom requirements, a multistage space-time adaptive processing (STAP) architecture is constructed
Keywords :
computational complexity; decorrelation; interference suppression; planar antenna arrays; radar antennas; radar clutter; radar detection; radar signal processing; search radar; signal classification; space-time adaptive processing; spaceborne radar; Earth orbit; STAP architecture; adaptive training; antenna aperture; aperture configuration; bandwidth-induced decorrelation; clutter; computational complexity; coverage rate; degree-of-freedom requirements; ground moving target indicator; high revisit rates; interference rejection; low velocity object classification; low velocity object detection; multistage space-time adaptive processing; radar signal processing; signal processing architecture; space-based GMTI radar; surveillance radar; target signals; wide area coverage; Aperture antennas; Bandwidth; Computational complexity; Computer architecture; Earth; Radar antennas; Radar clutter; Radar detection; Radar signal processing; Spaceborne radar;
Conference_Titel :
Radar Conference, 1999. The Record of the 1999 IEEE
Conference_Location :
Waltham, MA
Print_ISBN :
0-7803-4977-6
DOI :
10.1109/NRC.1999.767282
