Title :
MIMO Distributed Imaging of Rotating Targets for Improved 2-D Resolution
Author :
Pastina, D. ; Santi, F. ; Bucciarelli, M.
Author_Institution :
Dipt. di Ing. dell´Inf., Univ. of Rome “La Sapienza”, Rome, Italy
Abstract :
This letter deals with the multiple-input-multiple-output distributed radar imaging of rotating targets. The distributed system is based on formation-flying platforms, which can be configured with proper cross-track and along-track displacements. The platforms carry active radar systems transmitting almost orthogonal waveforms; exploiting both monostatic and bistatic acquisitions, range and cross-range resolution improvement can be achieved, and a maximum theoretical 2-D resolution cell improvement factor can be obtained significantly greater than the number of flying platforms. The required distributed focusing technique is developed, and its effectiveness and robustness is tested against simulated data. The proposed distributed system could be suitable to the application of ship target imaging, using a reconfigurable formation of platforms, for maritime surveillance in wide sea areas.
Keywords :
MIMO radar; MIMO systems; radar imaging; MIMO distributed imaging; active radar system; along-track displacement; bistatic acquisition; cross-range resolution improvement; cross-track displacement; distributed focusing technique; distributed system; formation-flying platform; maritime surveillance; maximum theoretical 2-D resolution cell improvement factor; monostatic acquisition; multiple-input-multiple-output distributed radar imaging; orthogonal waveform; platform reconfigurable formation; rotating target; ship target imaging application; simulated data; wide sea area; Focusing; Geometry; Image resolution; MIMO; Radar imaging; Sensors; Synthetic aperture radar; Inverse synthetic aperture radar (ISAR); multiple-input–multiple-output (MIMO); multiple-input???multiple-output (MIMO); resolution; synthetic aperture radar (SAR);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2014.2331754