简介:Aswitchingvariabilityindex(SVI)constantfalsealarmrate(CFAR)detectorisproposedforimprovingthedetectionperformanceofVI-CFARdetectorsinmultipletargetsbackgrounds.Whenthepresenceofnon-homogeneityinCFARreferencewindowsisindicatedbyaVI-CFARdetector,aswitchingCFARdetectorisintroducedtooptimizetheperformanceoftheVI-CFARdetectorinhomogeneous,multipletargetsandclutteredgebackgrounds.ThestructureandparametersselectionmethodoftheSVI-CFARdetectorispresented.ComparisonswithclassicCFARdetectorsandrecentlyproposeddetectorsarealsogiven.TheoreticalanalysisandsimulationresultsshowthatSVICFARdetectormaintainsthegoodperformanceoftheVI-CFARdetectorinhomogeneousandclutteredgebackgrounds,whilegreatlyimprovingthecapacityofanti-multitargets.
简介:WiththeconditionsofsmalldatasizeandlowSignal-to-NoiseRatio(SNR),theapplicationofHigherOrderStatistics(HOS)isrestrainednotonlybyitshighestimationvariance,butalsobyitslowestimationprecision.Therefore,amodifiedHOSbasedTimeDelayEstimation(TDE)algorithmisproposedtoovercometheseproblems.ComparingwiththeconventionalTDEalgorithms,theestimationvarianceisimprovedgreatly.Atypicalsimulationexampleiscompletedinordertotesttheperformanceofthealgorithmproposed,whichshowsthattheproposedalgorithmhasadvantagesoverthetraditionalonesinbothdetectionperformanceandcomputationefficiency.
简介:提出了一种新的恒虚警检测算法SOSGO-CFAR。该算法应用检测单元采样作为选择参考单元的依据,使用了基于转换恒虚警(S-CFAR)和排序选大恒虚警(OSGO—CFAR)的复合算法。文章给出了该算法在均匀背景中的数学分析。并在均匀背景、杂波边缘和多目标情况下,用MonteCarlo方法进行了仿真分析。结果表明,该检测器既具有均匀背景下和CA-CFAR相近的良好性能,在杂波边缘环境中,具有接近OSGO-CFAR的性能,且在多目标环境中,其性能明显好于S-CFAR。
简介:韩国开发成功“高性能热感知传感器”;法国KERMEL公司推出HEROSKIN新式面料;山东发明四种轻便实用新型消防器材。