LFM signal parameter estimation based on Nuttall window Energy Barycenter Correction Method

LFM signal is widely used in the domain of radar, sonar and communication. Both reliability and real-time is important for parameter estimation. The Fractional Fourier Transform exists problem of large calculation and bad real-time performance. To solve the problem, we use the Energy Barycenter Correction Method based on Nuttall window, combining with the idea of descending dimension. This method accomplish the task of turning two-dimensional search into one-dimensional search and get accurate estimates of frequency modulation ratio. At last, we use the method of the Fractional Fourier Transform to estimate Initial Frequency. So the real-time performance can be ensured, and the estimation accuracy can be improved. The simulation results show the validity and accuracy of the method, and the method has certain engineering application value.