Abstract:

According to the different Doppler frequencies, an efficient algorithm for Doppler frequencies, ranges and bearings three dimensional parameters estimation of nearfield moving targets is presented for the millimeter continuous wave array radar system. Firstly, the frequency of target echo is estimated using all phase fast Fourier transform (apFFT) method. Then the Doppler frequencies estimations are corrected using phase difference correcting spectrum method. Finally, for the phase spectrum of apFFT containing the position information of the target，the range and bearing of each target is estimated employing two dimensional multiple signal classification (2-D MUSIC) algorithm. Simulation results show the validity of the algorithm.