Abstract: There is provided a method and a system for estimating parameters of a multi-tone signal made up of at least one single-tone signal, wherein the method comprises: generating time samples of the multi-tone signal by using a sampler; calculating the discrete Fourier transform (DFT) frequency samples by using a processing unit; calculating an intermediate vector from the calculated discrete Fourier transform (DFT) frequency samples by using the processing unit; defining coefficients of a polynomial from the components of the intermediate vector; calculating the roots of the polynomial by using the processing unit; calculating an amplitude-related vector from at least the roots of the polynomial by using the processing unit; and calculating estimates of the parameters of the multi-tone signal from the roots of the polynomial and the amplitude-related vector.