摘要
当快拍数较少和存在系统误差时,自适应波束形成性能急剧下降,特别是当输入信噪比较大时,会出现严重的信号相消现象.文中利用时域信息提出一种新的自适应波束形成方法,理论分析表明,该方法为目标多普勒频率已知条件下最大似然估计结果.该方法能有效地克服信号相消现象,并且具有良好的波束保形能力和快速收敛特点。
A small number of samples and system errors can seriously degrade performance in adaptive arrays, particularly when the input signal to noise ratio (SNR) is large. In this paper, a new adaptive beamforming method based on using signal Doppler information is proposed. It has the advantages of eliminating the problem of signal cancellation, a good beam pattern with the properties of low sidelobe level and fast convergence, which are confirmed by computer simulations.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
1998年第5期555-559,共5页
Journal of Xidian University
基金
国家自然科学基金
国家预研基金