基于短基线传感器网络的远场声源TDoA定位组合算法-论文.pdf

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1、计算机研究与发展DOI：10．7544／issn1000—1239．2014．20120407JournalofComputerResearchandDevelopment51(3)：465—478，2014基于短基线传感器网络的远场声源TDoA定位组合算法崔逊学卢松升陈云飞高浩珉易廷(陆军军官学院合肥230031)(Xxcui@tsinghua．org．cn)CombinationTDoALocalizationAlgorithmsforFar—FieldSoundSourceBasedonShortBase-LineSensorN

2、etworkCuiXunxue，LuSongsheng，ChenYunfei，GaoHaomin，andYiTing(ArmyOfficerAcademyD，PLA，Hefei230031)AbstractForthelocalizationproblemoffar—fieldsoundsource，theTDoApositioningschemeisproposedbyusingshortbase—linesensornetworkinthepaper．Usuallythereisakindoflocalizationalgorit

3、hmswhichdonotneedanestimatedinitialpoint；ontheotherhand，thereisanotherkindofalgorithmswhichdependonaninitialestimation．Inthepaperthetwokindsofmethodsarecombined。andsevera1combinationalloealizationalgorithmsaredeveloped．Themainideaisthatthefirstkindoflocalizationalgorith

4、msareappliedtofinishacoarsepositioningprocessandoutputaninitialestimationlocation，whichisinputtedastheinitialvalueofthesecondkindofalgorithmswithhighpositioningprecisiontotakeanadvantageandsupplyagapfromthem．Thecircularerrorprobabilityofcombinationallocalizationalgorith

5、msisproposedtodemonstratethefeasibilityoftheperformanceevaluationcriterion，whichisbasedonMonte—Carlomethodandasimplecaseofgeometrydeployment．Thecircularerrorprobabilityofcombinationalalgorithmsisnumericallyanalyzed，anditisconcludedthatthecombinationofsphericalinterpolat

6、ionandleastsquaredequationerrorhasanoptima1performance．Thebox—plotcharacterisexperimentedaboutthiscombinationalgorithm．Accordingtothesimulationexperimentsofdifferentdistancesandstandarddeviationofsoundrangedifference，andsomesoundsourcedataobtainedfromtheactua1fieldscene

7、，theconclusionofthepaperhasbeenverified．Keywordssensornetwork；targetlocalization；timedifferenceofarrival(TDoA)；far—fieldsoundsource；shortbase—line摘要针对远场声源定位问题，提出到达时间差(TDoA)定位的短基线传感器网络方案．通常有一类定位算法无需估计初始点，而另一类算法则依赖初始估计值，提出将这2类方法相结合，设计出几种组合定位算法．主要思想是扬长避短，由第1类定位算法实现粗定位和输出初始

8、估计位置，将其作为初始点输入给定位精度高和依赖初始值的第2类算法．提出利用蒙特卡洛法和简化的几何配置案例，计算定位算法的概率误差圆，论证了这种性能评估准则的可行性．通过对组合算法的概率误差圆进行数值分析，得出球形插值法与