Nonstationary clutter suppression for airborne conformal array radar
The essence of nonstationary clutter for airborne radar with conformal antennas array (CAA) is analyzed, and an angle-Doppler compensation method for clutter suppression is proposed. Compared with the uniform linear antennas array (LAA), the clutter angle-Doppler spectrum distribution of CAA should be described in four-dimension space, i.e., three-dimension space and time, because the elements of CAA are distributed in three-dimension space. According to this theory, the clutter nonstationarity for airborne radar with CAA is firstly analyzed and the nonstationary nature of it is given. Then an improved STAP method for airborne radar with CAA is proposed, and it compensates for the mainlobe clutter in four-dimension frequency domain. Finally, the simulation results show the effect of the novel method.
nonstationarity clutter suppression conformal antennas array (caa) space-time adaptive processing (stap)