The invention belongs to the technical field of
radar signal detection and evaluation, and particularly relates to a QFM
signal parameter evaluation method based on a four-order asymmetrical
product type kernel function. The method includes the steps of firstly, calculating the initial
signal energy, setting a circulation initial value and establishing a matrix used for storing all subsequent component parameter
estimation values; secondly, multiplying the time
delay function of the four-order asymmetrical
product type kernel function with the conjugation time
delay function of the four-order asymmetrical
product type kernel function, and conducting
phase matching and converting on phases of the four-order asymmetrical product type kernel function, wherein the
estimation values of the second parameters of the signal components can be obtained in the positions of
frequency domain peak values; thirdly, constructing a new four-order asymmetrical product type kernel function for signals with compensation conducted on the second parameter
estimation values, and conducting
fast Fourier transform to obtain a frequency-frequency change rate two-dimensional
distribution diagram, wherein third parameter estimation values and third parameter estimation values of the signal components can be obtained from the positions of the peak values; fourthly, filtering the signal components, estimated in the steps, out of the signal; fifthly, resetting cyclic variables and a signal, and calculating the ratio of the
total energy of the signal to the initial signal energy.