Abstract: The auxiliary channel processing(ACP) is one of the reduced rank methods for space time processing(STAP) clutter mitigation. However, the ACP technique has an imperfection of signal self-nulling by the correlation between the clutter in the auxiliary channel and the signal in the main channel due to the limited samples in the non-homogeneous environments. Thus, a new method for clutter mitigation based on ACP for phased array airborne early warning(AEW) radar was proposed, which aims at avoiding the bad effect of the target signal in the adaptive weight training, and its detailed realization structure was also given. The new method is very robust whether the target exists training, and its detailed realization structure was also given. The new method is very robust whether the target exists or not, therefore greatly improving the target test performance. The final computation experiments also prove the effectiveness of the proposed method.

Key words: phased array ADW radar, space time adaptive processing, non-homogeneous environments, the auxiliary channel processing