The maximum likelihood estimator for acoustic synthetic aperture processing
Albert H. Nuttall · IEEE Journal of Oceanic Engineering · 1992
The maximum likelihood estimator of source amplitude, bearing, and frequency for a moving towed line array of equispaced elements is discussed. A two-dimensional search in equivalent phase and frequency variables is found to yield the best estimates of the unknown parameters. Application to a physical experiment and comparison with the Cramer-Rao bound verify the unity of the approach.>