Abstract: To solve the problem of angle limitation of the single radar, a method for extracting three-dimensional precession characteristics of the ballistic target based on netted radar is proposed. Firstly, the linear sum signal of the scatters' radial distance is independently estimated from the time-profile signal by radar in the radar net, and the precession parameters can be extracted by the sum signal's spectral characteristics. Then to improve the precision of the estimation of parameters the above parameters are fused by the method of weighted coefficient. Lastly, making use of the relationship between the multi-view of netted radar and the micro-Doppler signal, the three-dimensional micro-motion features are obtained by solving nonlinear multivariable equation systems. Simulation results prove that the method can lead to both the high estimating precision and the three-dimensional micro-motion parameters.

Key words: netted radar, micro-Doppler, three-dimensional precession feature