Patent ID: 7535403
Filing Date: 2009-05-19
Classification: G01S,Y02A

Abstract:
1. A method to make a high resolution spectral analysis of a received range sampled periodic radiofrequency signal, said method determining the natural frequencies of the received signals, for each distance cell, from an autoregressive identification model, said method comprising the following steps: a filtering step applying to the received signal a trellis autoregressive filtering algorithm comprising M calculation stages, said step calculating, from N signal samples of said received signal, a set of M reflection coefficients μ a step for determining an optimum set of reflection coefficients, from the sets of coefficients determined in the filtering step; a step for determining the effective order P of the identification model of the filter, from the optimum set of M coefficients μ a step for determining the natural frequencies of the identification model, these natural frequencies being the roots of a polynomial A(z