MIMO声呐目标检测性能分析

重点研究MIMO声呐的目标检测性能,为MIMO声呐布阵方式和工作模式等的选择提供理论依据。通过理论分析给出了MIMO声呐接收机工作特性(ROC)曲线的表达式,分别包括并列式和分布式MIMO声呐,同时给出了相控阵、SIMO和MISO等形式声呐的ROC表达式。通过示例比较了相同情况下并列式MIMO声呐、分布式MIMO声呐、相控阵声呐和常规多基地声呐的ROC曲线。结果表明,相同条件下相控阵声呐波束指向方向上的目标检测概率高于并列式MIMO声呐,做脉冲积累的并列式MIMO声呐可以得到与相控阵声呐相同的检测性能,低信噪比时并列式MIMO声呐和相控阵声呐的目标检测概率高于分布式MIMO声呐,高信噪比时分布式MIMO声呐可以得到较高的检测概率,采用多个发射阵元的分布式MIMO声呐性能优于使用一个发射阵元的常规多基地声呐。

Analysis of MIMO sonar target detection performance

Target detection performances of MIMO sonar are studied in this paper.They are one of the theoretic foundations of elements placement and work pattern.Receiver Expressions of Receiver Operating Characteristics(ROC)curves are given through theoretical analysis.Including collocated MIMO sonar and distributed MIMO sonar.Expressions of ROC curves such as phase array sonar,SIMO sonar and MISO sonar are also given.ROC curve comparisons of collocated MIMO sonar,distributed MIMO sonar,phase array sonar and multi-base sonar are given in the same condition.Results indicate that target detection performance of phase array sonar in the beam direction is better than collocated MIMO sonar.Collocated MIMO sonar with pulse accumulation can get the same performance as the phase array sonar.Performances of collocated MIMO sonar and phase array sonar are better than distributed MIMO sonar in low SNR condition.In high SNR condition,distributed MIMO sonar can get a better performance.Performance of distributed MIMO sonar with multiple transmitting notes is better than multi-base sonar with only one transmitting note.