Space-time-frequency processing of synthetic aperture radar signals

• Published in: IEEE transactions on aerospace and electronic systems Vol. 30; no. 2; pp. 341 - 358
• Main Authors: Barbarossa, S., Farina, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.1994; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Detection, estimation, filtering, equalization, prediction; Exact sciences and technology; Filtering; Frequency estimation; Image resolution; Information, signal and communications theory; Linear antenna arrays; Object detection; Radar antennas; Radar detection; Signal and communications theory; Signal processing; Signal resolution; Signal, noise; Telecommunications and information theory; Time frequency analysis; Filtering; Noise reduction; Signal estimation; Signal processing; Performance; Target detection; Signal detection; Synthetic aperture radar
• ISSN: 0018-9251
• DOI: 10.1109/7.272259

The subject of this work is the detection and high resolution microwave imaging of objects moving on the ground and observed by an airborne radar. The proposed approach is based on a combined space-time and time-frequency processing. The space-time processing makes use of a linear array antenna and exploits the radar motion for filtering the received echoes in order to improve as much as possible the signal-to-disturbance ratio. The signal is then mapped onto the time-frequency domain, by computing its Wigner-Ville distribution, for a further filtering and for estimating its instantaneous frequency, necessary for the formation of a high resolution image of the moving object.< >