Abstract:

A new method which is known as Radon-modified discrete chirp Fourier transform (RMDCFT) is proposed to detect the space target and obtain the target’s parameters. The RMDCFT algorithm can obtain the data of the echo from the range unitslow time domain by searching the target’s motion parameters, then the corresponding transformation processing can be made. After that, the CFAR detection algorithm can be used and the target’s velocity and acceleration can also be obtained. This method can solve the range cell migration and Doppler frequency migration problems, and it is able to obtain the good estimation’s performance. This method is capable of detecting the target under the low SNR background. The performance of the proposed algorithm is verified through the numerical simulations and the mathematical derivation about the RMDCFT’s output signaltonoise ratio expression which is given.