Signal Processing for Large Bandwidth and Long Duration Waveform SAR
Multidimensional Systems and Signal Processing
Analytical Study of Bioelasticity Ultrasound Systems
IPMI '99 Proceedings of the 16th International Conference on Information Processing in Medical Imaging
Estimation of time-scaling factor for ultrasound medical images using the Hilbert transform
EURASIP Journal on Applied Signal Processing
Sampling theorems for Doppler-stretched wide-band signals
Signal Processing
ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: plenary, special, audio, underwater acoustics, VLSI, neural networks - Volume I
Theory of Waveform-Diverse Moving-Target Spotlight Synthetic-Aperture Radar
SIAM Journal on Imaging Sciences
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The problem of estimating the time delay and the Doppler stretch for wideband signals from a moving target is considered. The Cramer-Rao bound and the maximum likelihood (ML) method of estimation are derived. Due to the uncertainty of the reflection coefficient, the ML method may not be practicable. An alternative method involving the location of the peak of the wideband ambiguity function of the signal is suggested. The performance of the method is analysed, and, under high signal-to-noise ratios (SNRs), the method is asymptotically unbiased, and the variances of the estimates are closed to the Cramer-Rao bound for a large variety of signals. Optimum signals for the joint estimation of the time delay and the Doppler stretch under practical constraints are designed and, through computer simulations, their performance are shown to be superior to the commonly used signals