Title :
Space-time-frequency processing of synthetic aperture radar signals
Author :
Barbarossa, Sergio ; Farina, Alfonso
Author_Institution :
Rome Univ., Italy
fDate :
4/1/1994 12:00:00 AM
Abstract :
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
Keywords :
aircraft instrumentation; antenna arrays; array signal processing; echo suppression; filtering and prediction theory; linear systems; microwave imaging; parameter estimation; radar theory; remote sensing by radar; signal detection; signal processing; synthetic aperture radar; time-frequency analysis; Wigner-Ville distribution; airborne radar; echo suppression; high resolution image; high resolution microwave imaging; instantaneous frequency; linear array antenna; moving object; optimum space time filtering; radar motion; received echoes; signal detection; signal-to-disturbance ratio; simulation; space-time-frequency processing; statistical model; synthetic aperture radar signals; time varying filtering; Filtering; Frequency estimation; Image resolution; Linear antenna arrays; Object detection; Radar antennas; Radar detection; Signal processing; Signal resolution; Time frequency analysis;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
