Moving Target Indication via Three-Antenna SAR with Simplified Fractional Fourier Transform
نویسندگان
چکیده
منابع مشابه
Moving Target Indication via Three-Antenna SAR with Simplified Fractional Fourier Transform
Ground moving target indiction (GMTI) is of great important for surveillance and reconnaissance, but it is not an easy job. One technique is the along-track interferometry (ATI) synthetic aperture radar (SAR), which was initially proposed for estimating the radial velocity of ground moving targets. However, the measured differential phase may be contaminated by overlapping stationary clutter, l...
متن کاملApplication of Fractional Fourier Transform to Moving Target Indication via Along-Track Interferometry
A relatively unknown yet powerful technique, the so-called fractional Fourier transform (FrFT), is applied to SAR along-track interferometry (SAR-ATI) in order to estimate moving target parameters. By mapping a target’s signal onto a fractional Fourier axis, the FrFT permits a constant-velocity target to be focused in the fractional Fourier domain thereby affording orders of magnitude improveme...
متن کاملSAR and Moving Target Indication
Synthetic aperture radar provides high-resolution images of the non-moving ground scene, but fails to indicate and position moving objects. A short review of the motioninduced effects occurring in SAR images will open this lecture. Like in special airborne MTI systems, the solution to the SAR MTI problem is to use an array of antennas or subapertures and several receiving channels to cancel the...
متن کاملMoving Target Indication with a Millimeter Wave Monopulse SAR
Synthetic aperture radar offers high resolution images of a static scene while moving objects are often smeared and displaced in azimuth. Ground moving target indication with a monopulse system makes it possible to correct the azimuth displacement and measure an accurate individual radial velocity component of moving targets via special processing techniques. The presented method requires the f...
متن کاملHigh Resolution Millimeter Wave SAR for Moving Target Indication
Synthetic aperture radar (SAR) is an imaging radar technique that provides mapping of static ground scenes. Some existing and forthcoming SAR systems thereby provide very high resolution in the centimeter domain. While high azimuth resolution is achieved by signal processing techniques, range resolution for a traditional frequency modulated system is solely dependent on the signal bandwidth. Fo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2011
ISSN: 1687-6180
DOI: 10.1186/1687-6180-2011-117