[关键词]
[摘要]
在自适应数字波束合成(DBF)中,快拍数直接影响了协方差矩阵估计的效果,从而影响系统的输出信干噪比(SINR).文中分析了最大似然协方差矩阵估计和空间平滑协方差矩阵估计时,不同类型DBF系统采用快拍数大小同输出SINR关系.分析结论对于系统设计中快拍数确定具有重要意义.
[Key word]
[Abstract]
In the most algorithms of adaptive DBF, the number of the snapshots used to estimate the covariance matrix decides the estimation error directly, and it also effects the SINR of the system. The relationship between the number of snapshots and SINR are present here with maximum likelihood estimation and spatial smoothing estimation algorithms, which is important for the system designer to take the fight number of snapshots.
[中图分类号]
TN911
[基金项目]
重庆市自然科学基金
