Title :
Ultrawide-band coherent processing
Author :
Cuomo, Kevin M. ; Pion, J.E. ; Mayhan, Joseph T.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
In this paper, we develop an approach for estimating the ultrawide-band (UWB) radar signature of a target by using sparse subband measurements. First, we determine the parameters of an appropriate signal model that best fits the measured data. Next, the fitted signal model is used to interpolate between and extrapolate outside of the measurement subbands. Standard pulse-compression methods are then applied to provide superresolved range profiles of the target. The algorithm can automatically compensate for lack of mutual coherence between the radar subbands, providing the potential for UWB processing of real-world radar data collected by separate wide-band radars, because the processing preserves the phase distribution across the measured and estimated subbands, extended coherent processing can be applied to the UWB compressed radar pulses to generate superresolved radar images of the target. Applications of this approach to static test range and field data show promising results
Keywords :
extrapolation; image reconstruction; image resolution; interpolation; military radar; missiles; parameter estimation; pulse compression; radar imaging; radar resolution; UWB radar signature; coherence; extended coherent processing; extrapolation; interpolation; missiles; phase distribution; pulse-compression method; radar subbands; real-world radar data; sparse subband measurements; superresolved radar images; superresolved range profiles; ultrawide-band coherent processing; Coherence; Image coding; Phase estimation; Phase measurement; Pulse compression methods; Pulse measurements; Radar imaging; Radar measurements; Signal resolution; Ultra wideband radar;
Journal_Title :
Antennas and Propagation, IEEE Transactions on