Low sidelobe pattern synthesis and subspace projection

It is important to maintain low sidelobes where possible when performing adaptive beamforming or STAP in phased array radar systems in order to mitigate the effects of any inadequately suppressed interference. This paper presents a new algorithm for incorporating a low sidelobe pattern synthesis technique into subspace based beamforming methods. It is computationally efficient and also flexible as it can be used in conjunction with GSLC and direct beamforming approaches, the multi-stage Wiener filter and fast projection techniques. Simulation results demonstrate success in lowering sidelobe levels with several subspace methods in both spatial beamforming and STAP configurations.