基于移动通信网络无线定位技术的原理及应用(2)

重,在LS算法中增加约束项等。

基于移动通信网络无线定位技术的原理及应用

第3期　　　　　　　　　　赵军等　基于移动通信网络无线定位技术的原理及应用　　　　　　　　　　　　　　51

窝系统的定位性能,尤其是如何获得满意的定位精度进行深入地研究,因为有些应用需要较精确的定位,如定位到楼层。除了技术因素外,蜂窝电话定位技术的开发应用涉及到用户个人的行踪,还应考虑个人隐私权利的保护等方面。

参考文献

[1]ZagamiJM,PARLSA,BussgangJJ,etal.ProvidinguniversallocationservicesusingawirelessE911location

network[J].IEEECommun.Mag,1998,(4).

[2]ReedJH,etal.Anoverviewofthechallengesand

progressinmeetingtheE2911requirementforlocationservice[J].IEEECommun.Mag,1998,(4):30237.[3]DraneC,MacnaughtahM,Scottc.Positioningtelephones[J].IEEECommun.Mag,:46.

[4]GUOTi2yun,WUGuo2yang,LIJian2dong.Mobile

communication[M].Xi’an:Xi’anXidianUniversityPress,1995,9:2762280.[郭梯云,邬国扬,李建东.移动

通信[M].西安:西安电子科技大学出版社,1995,9:

2762280].

[5]LUWen2yuan,HEYing2xia,JINGNing,Technology

andapplicationofcellularphonepositioning[J].MobileCommunication,2000,(1).[陆文远,何颖霞,景宁.蜂窝

移动电话定位技术与应用[J].移动通信,2000,(1)].

作者简介:(1977-),男,华东师(。

(上接21页)变性,,因为是这一点保证了最小二乘拟合推估解的一致性。二者的根本区别是拟合推估是在无限维的Hilbert空间里进行运算,而经典的最小二乘估计是在有限维的线性空间进行运算。

最小二乘拟合推估有时可以看作是最小二乘估计和随机过程的结合,其解的统计意义表现的更为明显,这样,具有相同重要意义的解析性就被掩盖了。因此,我们从逼近论的观点来解释最小二乘拟合推估。从理论上说,核函数K(P,Q)可以任意选取;为了得到最佳解,我们选择了统计意义上的协方差函数作为核函数。然而,正如我们所讲的,选择任意一个对称、正定函数作为核函数都是合理的,因此,最小二乘拟合推估才被认为是在具有核函数的Hilbert空间里的纯解析插值,而不考虑其随机意义。实际上,在拟合推估中到底是统计解释正确还是解析解释正确,对于这个问题的回答与个人的喜好

(31)、(32)都保持不有关。但不管怎么说,解式(30)、

变,只有估计量的方差-

协方差解式式(34)、式(35)以及估计值的最佳性是完全建立在统计意义上的。

最后,有一点必须指出,那就是如果异常重力场不具备各向同性,那么这里的“最佳线性”估计值就不再是绝对的“最佳”了,“非线性”估计值可能比“线性”估计值具有更小的方差。

参考文献

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作者简介:刘念(1968-),男,陕西咸阳人,硕士,工程师,主要从事物理大地测量及测量数据处理方面的研究。

基于移动通信网络无线定位技术的原理及应用

ABSTRACTSOFTHEPRESENTISSUE

Mapping,Beijing100039,China;②ShenzhenMunicipalWirelessLocationandItsApplicationBasedonMobilePlanning&LandResourceBureau,Shenzhen518031,China)CommunicationSystemTheApplicationofGeneticAlgorithmsinInSARPhaseUnwrapping

Abstract:Phaseunwrapping(PU)puterresultsindicatethatthealgorithmworkswell

Key

words:

InSAR;

phase

unwrapping;

genetic

alogorithms

ZHAO-Zheng①,ZHANGJi-xian①,ZHANGGuo②(①ChineseAcademyofSurveyingandMapping,BeijingChina;②SchoolofInformationRSensing,WuhanUniversity,W)

Management&oftheDOM&DEMData

Abstract:Tomlostofdigitalorthomap(DOM)dataanddigitalelevationmodel(DEM)data,thispaperpresentsan.Toideaofbuildingasystembasedondatabasetechnologiesmakefulluseofthesedata,thesystemhavemanyfunctions,suchas2-DviewingofDOMwithDEMoverlapped,automaticallycreatingcontours,creatinglandscapemodelforvisualization,andcreatingtopographicmap.

Keywords:DOMDEM;landscapemodel;contour;topographicmap

JIANGXin,CHENYing(ResearchCenterofRemote

Sensing,TongjiUniversity,Shanghai200092,China)

TheTheoriticalandApplyingAnalysisof“Non-fiducialMethod”onRegionalNetworkMonitoringResearch

Abstract:“Non-fiducialmethod”istheappropriatemethodof

estimating

regionaldeformationmonitoring

network.Inthispaper,itsbasictheoryanditsadvantagesare

Abstract:Wirelesslocationinmobilecommunicationsystemisanovalandusefultechnologyinfuture3G.Thenecessity,method,architectureandcharacteristicsofmobiletelecommunicationnetwork-basedpositioningarediscussedinthispaper.Themain

technicaldifficultiesandthe

approachesofimprovinglocationaccuracyarealsoanalyzed.

Keywords:wirelesslocation;locationtechnology;mobilecommunication

ZHAOJun,LIXian-hua(TheOpeningLabofRemoteSensing&DigitalTech,EastNormalUniversity,

ShanghaiChina)

DmtheSiofVerticalCrustalithispaper,thedevelopmentsof

the

ulationtheoryofverticalcrustaldeforation,especiallythemethodsdevelopedbyChinesescholarshavebeenintroduced:forinstance,theapplicationsoftheFourierresolution,thewave

representation,theempiricalorthogonalfunction

resolutiontoanalysistheverticalcrustaldeformationfield,theverticalcrustalmovementmodelbasedonthefluxisotaticdatum

andtheCM

.Andtheiradvantagesandmodel

disadvantageshavebeenreviewed.Finally,theproblemthatneedstobefurtherstudiedandtheprospecthavebeendiscussed.

Keywords:thecrustverticalmovement;dynamicalnodel;deformationfield

ZHANGQin,①,WNAGJi-gang②,ZHAOLi-hua,FANYi-zhong③(①Dept.ofSurveying,Chang’anUniversity,Xi’an710054,China;②Dept.ofConstructionl,LianyungangChemicalCollege,Lianyungang222001,China;

③Dept.ofAstronomy,NanjingUniversity,Nanji …… 此处隐藏：4226字，全部文档内容请下载后查看。喜欢就下载吧 ……