In order to improve the monopulse angle measurement performance for the rectangular array when the mainlobe and sidelobe jammings exist,a Two-Dimensional Hierarchical Joint Adaptive Digital BeamForming(TDHJ-ADBF)method is proposed in this paper.The beamforming of TDHJ-ADBF method is divided into two stages.In the first stage,the mainlobe jamming corresponding to the angular measurement dimension is quickly estimated by the compressed multiple signal classification algorithm and pre-eliminated by a blocking matrix.Then the adaptive weights and beamforming are calculated using the joint constraint of beam direction and the linearity of monopulse response curve.The residue mainlobe jamming is further suppressed in orthogonal dimension at the second stage.Thereby both the mainlobe and sidelobe jammings are jointly suppressed,the linearity of the monopulse response curve is maintained.Simulation results demonstrate that the TDHJ-ADBF method exhibits an excellent jamming suppression capacity and a high precision of angle measurement.
关键词
自适应单脉冲/2维分级波束形成/压缩多重信号分类/主瓣干扰估计/干扰联合对抗
Key words
Adaptive monopulse/Two-dimensional hierarchical beamforming/Compressed MUltiple SIgnal Classification(C-MUSIC)/MainLobe Jamming(MLJ)estimation/Joint jamming suppression
维普
万方数据