1. 海军航空工程学院信息融合研究所,山东,烟台,264001
2. 西安电子科技大学雷达信号处理重点实验室,陕西,西安,710071
3. 海军航空工程学院信息融合研究所,山东,烟台,264001
4. 西安电子科技大学雷达信号处理重点实验室,陕西,西安,710071
网络出版:2017-06-25,
纸质出版:2017
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简涛, 廖桂生, 何友, 等. 非高斯杂波下基于子空间的距离扩展目标检测器[J]. 电子学报, 2017,45(6):1342-1348.
JIAN Tao, LIAO Gui-sheng, HE You, et al. Range-Spread Target Detector Based on Subspace in Non-Gaussian Clutter[J]. Acta Electronica Sinica, 2017, 45(6): 1342-1348.
简涛, 廖桂生, 何友, 等. 非高斯杂波下基于子空间的距离扩展目标检测器[J]. 电子学报, 2017,45(6):1342-1348. DOI: 10.3969/j.issn.0372-2112.2017.06.009.
JIAN Tao, LIAO Gui-sheng, HE You, et al. Range-Spread Target Detector Based on Subspace in Non-Gaussian Clutter[J]. Acta Electronica Sinica, 2017, 45(6): 1342-1348. DOI: 10.3969/j.issn.0372-2112.2017.06.009.
在辅助数据缺失的非高斯杂波背景下,采用两步法设计策略研究了距离扩展目标检测方法.首先,在杂波纹理分量已知的条件下,对待检测数据进行高斯化,利用高斯背景下杂波协方差矩阵和目标散射点幅度的合适估计,建立检验统计量.其次,利用待检测数据在信号子空间正交补上的正交投影,估计杂波纹理分量,提出了基于子空间的距离扩展目标自适应检测器,并证明了其对杂波纹理分量的恒虚警率(CFAR,Constant False Alarm Rate)特性.仿真结果表明,在典型非高斯背景下,所提检测器的CFAR特性和检测性能均优于对比检测器;另外,阵元数、目标距离单元数或杂波尖峰的增加,能不同程度改善检测性能.
In non-Gaussian clutter environment
the range-spread target detection without secondary data is addressed
by utilizing two-step design procedure.Firstly
with known clutter texture component
the data under test is transformed into the Gaussian ones.And then the test statistic is derived by using the appropriate estimates of unknown clutter covariance matrix and target scatterer amplitudes.Secondly
by orthogonally projecting the data under test onto the orthogonal complement of signal subspace
the unknown clutter texture components are estimated.Consequently
the range-spread target detector based on subspace is proposed
and its constant false alarm rate (CFAR) property is also analyzed.It is showed that
under the classical non-Gaussian background
the proposed detector outperforms the compared ones
in terms of CFAR property and detection performance.In addition
its detection performance enhances to different extents
as the number of sensors
the number of target range cells or the clutter spikiness increases.
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