Patent ID: 6400310
Filing Date: 2002-06-04
Classification: G10L

Abstract:
A Doppler-based speed estimator comprising:a pulse-Doppler radar configured to (1) sense an object, and (2) produce an observation record representative of a backscattered signal from said sensed object; a filter bank comprising a plurality of first order filters in parallel or a plurality of second order filters in parallel, said filters being tuned with a set of filter bank poles to desired frequencies, each of said filters being configured to (1) receive said observation record, and (2) filter said observation read in accordance with a filter function defined by at least one of said filter bank poles; a covariance estimator configured to (1) receive said filtered observation records from each of said filters, and (2) determine-a set of filter covariances therefrom, a decoder configured to (1) receive said filter covariances, (2) receive said filter bank poles, and (3) determine a set of autoregressive parameters from said filter covariances and said filter bank poles, said autoregressive parameters at least partially defining the coefficients of a denominator polynomial for a transfer function from which the power frequency spectrum of said observation record is determinable; and a spectral plotter configured to (1) receive said filter parameters, (2) receive data corresponding to the coefficients of a numerator polynomial for said transfer function, and (3) determine the power frequency spectrum of said observation record from said filter paters and said numerator data, the speed of said sensed object being idefiable therefrom.