CN1311652C - 无线时钟同步 - Google Patents
无线时钟同步 Download PDFInfo
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- CN1311652C CN1311652C CNB018037100A CN01803710A CN1311652C CN 1311652 C CN1311652 C CN 1311652C CN B018037100 A CNB018037100 A CN B018037100A CN 01803710 A CN01803710 A CN 01803710A CN 1311652 C CN1311652 C CN 1311652C
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- 238000000034 method Methods 0.000 claims abstract description 36
- 230000001360 synchronised effect Effects 0.000 claims abstract description 19
- 230000002596 correlated effect Effects 0.000 claims abstract 4
- 230000000875 corresponding effect Effects 0.000 claims 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000006870 function Effects 0.000 description 6
- 239000004744 fabric Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
描述了用于同步定位***中的接收基站的内部时钟的一种***和方法。信标站在一个已知的位置发射参考数据包。将第一到达时间和第二到达时间进行对比,以决定一个相关到达时间数据。第一到达时间是第一个接收基站接收到参考数据包的时间,第二接收时间是第二个接收基站接收到参考数据包的时间。线性多项式拟合作为相关到达时间数据,及第一与第二到达时间的函数。被计算出来。作为线性多项式拟合的函数的数据包到达第一和第二接收基站的时间被同步。
Description
相关申请参考
本申请要求2000年11月14日提交的美国临时申请序列号60/248357,以及2001年2月20日成文的美国临时申请序列号60/270254两份申请的利益,并在这里完整的引入作为参考。
发明领域
本发明涉及一种同步无线设备时钟的方法和***。特别地,本发明涉及同步用于决定移动设备的位置的无线接收基站的时钟。
发明背景
近期无线设备的增长格外惊人,同时包括能够在相互间和/或与中央地点间交换数据或语音信号的通信和计算设备。这些设备典型地是用无线电波通过专用频率或专用电磁频谱段来通信。这些无线电通信的范围是不同的,可以利用中继器、蜂窝塔、或其他设备网络节点来扩展范围。
在这些设备中某些可能是蜂窝电话,但是逐渐地这些设备开始具备多种功能,例如具有无线能力的可携带式或掌上电脑,e-mail发送和接收设备,传呼机,或双向无线电通信设备。这些设备发送的信号也可以被用于定位该设备,以及定位设备的使用者。例如,在紧急情况下蜂窝电话可以被更改用于查明呼叫者的位置。在某些情况下,信标或定位设备可以具备在危险情况下跟踪人员位置的特定功能,这些人员如救火队员或其他救援工作者。
现在已经开发出不同的定位发射无线电信号的设备的方法。例如,通过采用两个或更多定向接收器可以利用三角测量来定位发射器。然而,接收器必需相当复杂,因为他们必须能够决定一个无线电信号到达的方位,或者方向。
发明概述
本发明是一种同步定位***中接收基站的内部时钟的方法和***。一个信标站在已知的位置发射参考数据包。将第一到达时间和第二到达时间进行对比,以决定一个相关到达时间数据。第一到达时间是第一个接收基站接收到参考数据包的时间,第二接收时间是第二个接收基站接收到参考数据包的时间。计算线性多项式拟合作为相关到达时间数据以及第一与第二到达时间函数。作为线性多项式拟合的函数的数据包到达第一和第二接收基站的时间被同步。
另一方面,本发明是一种定位移动设备的方法,包括同步接收基站的内部时钟,在一对接收基站从移动设备接收数据包,在该对接收基站中每个决定数据包到达的同步时间,以及根据步到达时间使用双曲三边测量术计算出移动设备的位置。
附图简述
图1是根据本发明的一个实施例构成的一幅曲线图,展示了用于确定移动无线设备位置的双曲线的交点;
图2是根据本发明的一个是实施例构成的一幅示范性布局图,显示了无线设备的发射和接收;及
图3显示了根据本发明构成的一个同步用于定位移动设备的接收基站的时钟的方法实施例。
详细描述
本发明是同步无线设备内部时钟的一种方法和***。在很多情况下都十分需要确定一个无线设备的位置。这种能力在必须定位设备用户的紧急情况下可能是无价之宝。例如,定位一个使用蜂窝电话拨打911的呼叫者将会十分有用,即使呼叫者失去了行动能力,或是不能提供他所处的位置。在其他情况下,获悉无线设备的位置也可能非常有用,如个人数码助手(Personal Digital Assistant)可能采用IEEE 820.11,IEEE 802.11b,IEEE 802.11a,蓝牙或是任何有关于无线LAN的未来标准(合称为“802.11x网络标准”),来提供位置敏感信息给该设备。
精确定位可以发射信号的设备的关键是进行精确的时间操作。确定移动单元位置的一种方法是使用双曲三角测量术。根据这种方案,时间信息可以被映射到位置信息。需要被定位的移动设备发送出一个包,即发射包含诸如描述发射器的标识符的数据的信息。这个包被一些已知位置的接收器接收到。接收器的位置可以是固定的,或者接收器是可移动的。如果接收器是可移动的,***必须知道他们的位置。
数据包到达任何两个接收器的时间差允许一条唯一的空间双曲线的计算,移动设备沿着这条双曲线被定位。通过考虑另一对接收器上数据包的到达时间差,可以计算第二条空间双曲线,移动设备沿着这条双曲线被定位。这么定义的两条双曲线的交点确定了移动设备的实际位置,双曲三角测量术的一个重要特点就是只需要知道数据包到达每个接收基站对的相对时间,而不是到达的绝对时间,即接收到数据包的实际时间。一旦知道了数据包到达两个接收基站的相对时间,就可以确定发射移动设备的位置。
图1显示了上述方法的图形表示。一个移动设备M发射数据包,数据包能够被接收基站A、B、C接收。数据包被至少两对接收基站依次接收到。例如A、B对和B、C对。每一对都可以计算出一条定位移动设备的双曲线,如双曲线A-B和B-C。那些双曲线上的每一点都对应于一组位置坐标,如图1所示。两条双曲线的交点就定义了移动设备的位置。在这个例子中,移动设备位于X坐标轴上-33个单位和Y坐标轴上22个单位处。
在根据本发明构成的定位***中,每个接收器都位于不同的位置,运行一个独立于其他接收基站的时钟。因为时钟不能做成完全一致,尽管有着非常相似的频率,每个时钟都有区别,以及自己的随机起始时间。为了准确的确定移动设备的位置,所有接收基站的时钟必需被同步。如果接收基站位于相同的地点,或相互之间相对接近,所要求的同步可以通过线路一起传输时钟来实现。然而,如果接收基站位于室外独立的地点,那么将接收器用线路连接在一起在开支上是不可行的。
本发明的实施例提供了一种为实际上无法用线路连接在一起的接收基站同步时钟的方法和***。在一个实施例中,提供了一个固定的,已知位置的,接近接收基站的地理中心点的信标站。如图2所示,信标站10位于接收基站12、14、16、18的中心。整个***被设计用于定位移动发射设备20。尽管只显示了一个移动设备20,但是该***可以被应用于定位多于一个设备。
信标站10不停的发射参考数据包22,并被每个接收单元12-18接收到。这种参考包22可以基于802.11x网络标准生成,并由固定于网络中预先确定位置的接入点发射。每个接收单元在数据包到达时为它们打上时间标签。在信标站10位于和一对接收基站例如基站14和16等距离,以及那些接收基站的时钟完全相同的这种理想情况下,数据包在那些接收基站上的到达时间差异(TDOA)将是零,因为根据它的内部时钟,两个接收机中的每一个将在完全相同的时间接收到数据包。在实践中,如果两个时钟没有被同步,那末即使接收基站14、16和信标站10实际上是等距离的,TDOA也将不会是零。
在根据本发明同步所有接收基站时钟的过程中,从信标站10接收到的数据包计算得到的TDOA被强迫置为零。为了同步时钟所有接收基站12-18的TDOA被强迫置为零,即使信标站10可能不和所有接收基站等距。因为信标站10和接收基站12-18不会相对移动,因此TDOA的预期值是常数,而由于行TDOA强置为零所造成的不准确性并不大,并且还可能被后面根据本发明所进行的计算所弥补。
根据本发明的一个示范性实施例,两个接收站A、B间的TDOA是通过将基站B的时间标签减去基站A的时间标签来计算的,例如接收基站14和16。换句话说就是,TDOAA/B=tB-tA。在信标站10和所有接收器等距的情况下,到达时间差异将是零,即TDOAA/B=0。作为第一步,这被假设是正确的。如果任何两个接收站接收到的一系列数据包的时间标签相互关联,在使用完全同步的时钟时,接收站A的时间标签和接收站B的时间标签为坐标构成的图将是斜率为1的一条直线。例如,如果将时钟A指示的时间标签作为Y轴值,时钟B指示的时间标签作为X轴值,直线方程将是y-x=0,即y=x。
然而,正如上面所解释的,每一个接收基站12-18的时钟是独立的,这样就具有细微差别的频率和起始时间。实际的到达时间坐标图因此决不会是斜率为1的直线。而是根据等式y=mx+b所作的直线。在该等式中,m是直线的斜率,b是y轴上的截距。直线的斜率是所考虑的两个时钟的频率差的函数,而y轴截距是两个接收站的随机起始时间差的函数。根据本发明的实施例,使用一个线性多项式拟合来从数据中确定适当的斜率和y轴截距。该线性多项式拟合可以用最小二乘法来确定。
如果接收基站A和B的时钟是完全同步的,斜率m将一直等于1,截距b将一直等于零。在实践中,根据本发明的一个示范性实施例,斜率和截距将不断的重新计算和更新。在该实施例中,其中一个接收基站的时钟被用来作为参考时钟,其他所有接收基站的时钟都按照参考时钟的频率和起始时间来校准。本发明的实施例的参考时钟可以在接收基站中任意选择,因为只有数据包的相对到达时间才是重要的,而不是绝对时间。
一旦本发明中的计算斜率和y轴截距的多项式系数被确定,接收基站对的非零TDOA将被补偿。每个接收基站12-18和信标站10间的已知的距离差别被用于确定偏置,即应用于由两个接收基站组成的不同小组间的实际TDOA的修正因子,并根据已知的信标站10和接收站12-18的位置计算出预期的TDOA。
一旦根据本发明开始修正步骤,每个时钟将有三个与之相关的,用于同步时钟的数字。每个时钟有一个斜率m,由于频率偏移,m通常将是和1不同的值;一个y轴截距b,它由时钟的随机起始时间决定;一个由于每个接收基站12-18的不同距离所产生的偏置。
当移动设备20发送的数据包24被接收基站12-18中的一个接收到时,它是被接收基站的时钟打上标签的时间。时间标签还回被调整以补充内部时钟的频率偏移和随机起始时间。然后使用公式TDOAA/B=tA-tB和从移动设备20来的数据包的接收调整时间计算出接收基站对之间的TDOA。当TDOAA/B确定之后,还要加上偏置,以补偿和m及b的计算相关的非零TDOA,这在时钟同步过程中实现。在为至少两对接收基站对计算TDOA后,移动设备20的位置可以用双曲三角测量法来确定。
图3显示了描述根据本发明的实施例构成的方法的流程图,用于同步接收基站的时钟以及确定移动设备的位置。我们将参考图2中的组件来描述该方法,尽管该方法可以被应用于其他不同数目的接收基站、移动设备和信标站的配置。在步骤100中,参考数据包22从信标站10被发送出去,并被接收基站12-18接收到。正如上面所描述的,在步骤102中将为每个接收基站计算斜率m和y轴截距,并假设信标站10和每个接收基站12-18间的距离是相等的。
一旦计算出斜率和y轴截距,就要在步骤104中为每个接收基站计算偏置。如上所述,偏置是根据信标站10和接收基站12-18的已知位置来计算的。步骤100、102和104是同步步骤的一部分,用于校准接收基站的时钟,这样移动设备20的定位才能完成。在时钟被同步后,步骤106到112针对定位移动设备20。
在步骤106中一个数据包24从可移动设备20被发送出,并由至少两对接收基站接收到。在步骤108中利用前面为了同步内部时钟计算出的斜率和y轴截距,计算出多个接收基站对的TDOA。在步骤110中使用步骤104中计算出的偏置值来修正计算出的TDOA,多个接收基站对的修正TDOA值被用于计算移动设备20被定位的双曲线。如前所述,为至少两对接收基站计算出的双曲线可以被用于在步骤112中来定位移动设备20。
这里参考着由一个移动设备和四个固定接收基站构成的一个实施例描述了本发明。但是,也可以设计有额外移动设备和/或额外信标站和/或额外或更少接收基站的其他实施例。因此,在不离开后面权利要求中提出的本发明的最宽泛的内容和范围的情况下,可以对该实施例做出不同的修改和变化。因此,这里的说明和附图应该被看成是展示性的,而不是限制性的。
Claims (15)
1.一种用于同步一个***中第一对的第一和第二接收基站A、B的内部时钟的方法,其特征在于,该方法包括以下步骤:
在已知位置从信标站发射一系列参考数据包,所述已知位置邻近于第一对的第一和第二接收基站A、B的地理中心点;
假设所述信标站位于所述地理中心点;
对于所述一系列参考数据包,通过确定时间tA和tB相互参照,将第一到达时间tA和第二到达时间tB进行相关,第一到达时间tA是接收基站A接收到某个参考数据包的时间,对应的第二到达时间tB是接收基站B接收到所述某个参考数据包的时间;
计算线性多项式拟合tB=mtA+b,其中斜率m是接收基站A和B的内部时钟的频率差的函数,y轴截距b是接收基站A和B的内部时钟的不同起始时间所造成的偏移量;
使用所述信标站与接收基站A和B在距离上的已知差来确定内部时钟的偏置;
根据斜率m、偏移量b和偏置来同步接收基站A和B的内部时钟。
2.如权利要求1所述的方法,其特征在于,进一步包括以下步骤:
对第三和第四接收基站重复相关和计算步骤,以确定第三和第四接收基站的另一斜率,另一y轴截距和另一偏置;
3.如权利要求1所述的方法,其特征在于,进一步包括以下步骤:
对第三和第一接收基站A重复相关和计算步骤,以确定第一和第三接收基站的另一斜率,另一y轴截距和另一偏置;
4.如权利要求2所述的方法,其特征在于,进一步包括以下步骤:
作为移动设备发送的第一数据包的到达时间的函数,对第一和第二接收基站间及第三和第四接收基站间的到达时间差值作修正,计算第一和第二对接收基站的斜率,y轴截距和偏置,第一和第二接收基站对中的每一个包括第一、第二、第三和第四接收基站中的任意两个,第一对中包括至少一个第二对中不包括的接收基站。
5.如权利要求1所述的方法,其特征在于,进一步包括以下步骤:
重复发射、相关和计算步骤,以预先确定的速率更新接收基站的内部时钟的同步。
6.一种确定移动设备位置的方法,其特征在于,包括以下步骤:
根据权利要求1中的方法同步接收基站的内部时钟;
接收基站中的第一和第二接收基站接收从移动设备来的数据包;
在第一和第二接收基站确定数据包的同步到达时间;
计算第一和第二接收基站间的到达时间差值;及
作为同步到达时间的函数,使用双曲三角测量法,计算出移动设备的位置。
7.如权利要求6所述的方法,其特征在于,进一步包括以下步骤:
为至少第一和第二对接收基站确定相应的同步到达时间,第一和第二接收基站对中的每一个包括第一接收基站、第二接收基站、第三接收基站和第四接收基站中的任意两个,第一对中包括至少一个第二对中不包括的接收基站。
8.如权利要求6所述的方法,其特征在于,进一步包括以下步骤:
为至少第一、第二和第三对接收基站确定相应的同步到达时间,第一、第二和第三接收基站对包括第一接收基站、第二接收基站、第三接收基站、第四接收基站、第五接收基站和第六接收基站中的任意两个,第一对中包括至少一个第二和第三对中不包括的接收基站,第二对中包括至少一个第三对中不包括的接收基站。
9.如权利要求6所述的方法,其特征在于,同步步骤包括以下子步骤:
在一已知位置从信标站发射参考数据包;
将第一到达时间和第二到达时间进行对比,以决定一个相关到达时间数据。第一到达时间是第一个接收基站接收到参考数据包的时间,第二接收时间是第二个接收基站接收到参考数据包的时间;
计算一个作为相关到达时间数据,及第一与第二到达时间的函数的线性多项式拟合;及
同步参考数据包到达第一和第二接收基站的到达时间作为线性多项式拟合的函数。
10.一种用于同步移动设备定位网络的内部时钟的***,其特征在于,该***包括:
具有内部时钟的接收基站;
连接到接收基站的处理器;及
适合于发射一系列参考数据包到接收基站的信标站,信标站具有邻近于接收基站的地理中心点的已知位置,
每个接收基站被调整用于转发所述一系列参考数据包的接收时间至处理器,处理器被调整用于:
计算一对接收基站A和B的线性多项式拟合tB=mtA+b,其中tA和tB分别是接收基站A和B处的所述一系列参考数据包的接收时间,斜率m是接收基站A和B的内部时钟的频率差的函数,y轴截距b是接收基站A和B的内部时钟的不同起始时间所造成的偏移量;
使用所述信标站与接收基站A和B在距离上的已知差来确定接收基站A和B的内部时钟的偏置;
所述处理器进一步被调整用于根据斜率m、偏移量b和偏置来同步接收基站A和B的内部时钟。
11.如权利要求10所述的***,其特征在于,接收基站被成对分组,至少两对被用来定位移动设备。
12.如权利要求10所述的***,其特征在于,处理器接收第一和第二到达时间,第一到达时间是第一个接收基站接收到参考数据包的时间,第二接收时间是第二个接收基站接收到参考数据包的时间;处理器将第一到达时间和第二到达时间进行对比,以决定一个相关到达时间数据;处理器计算出作为相关到达时间数据,及第一与第二到达时间的函数的斜率和y轴截距值,假设信标站和第一及第二接收基站间距离相等;处理器从已知的信标站和第一及第二接收基站间的距离差计算出相关到达时间的偏置。
13.一种用于同步定位***中接收基站的内部时钟的方法,其特征在于,该方法包括以下步骤:
对于在所述定位***中的第一对接收基站A和B;
在已知位置从信标站发射一系列参考数据包;
假设所述信标站位于接收基站A和B的地理中心点;
对于所述一系列参考数据包,通过确定时间tA和tB相互参照,将第一到达时间tA和第二到达时间tB进行相关,第一到达时间tA是接收基站A接收到某个参考数据包的时间,对应的第二到达时间tB是接收基站B接收到所述某个参考数据包的时间;
计算线性多项式拟合tB=mtA+b,其中斜率m是接收基站A和B的内部时钟的频率差的函数,y轴截距b是接收基站A和B的内部时钟的不同起始时间所造成的偏移量;
使用所述信标站与接收基站A和B在距离上的已知差来确定内部时钟的偏置;
根据斜率m、偏移量b和偏置来同步第一对接收基站A和B的内部时钟;以及
对于所述定位***中的第二对接收基站重复上述步骤。
14.如权利要求13所述的方法,其特征在于,第一个接收基站中的一个同时被包括于第一和第二对接收基站中。
15.如权利要求13所述的方法,其特征在于,第一接收基站对包括第一接收基站和第二接收基站,第二接收基站对包括第三接收基站和第四接收基站。
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US20050032516A1 (en) * | 2002-05-24 | 2005-02-10 | Bruno Marchevsky | Method and apparatus for detecting the presence of a wireless network |
US7010298B2 (en) * | 2002-05-24 | 2006-03-07 | Chrysalis California L.L.C. | Method and apparatus for detecting the presence of a wireless network |
US6961541B2 (en) * | 2002-05-24 | 2005-11-01 | Aeroscout, Inc. | Method and apparatus for enhancing security in a wireless network using distance measurement techniques |
US7308276B2 (en) * | 2002-06-04 | 2007-12-11 | Symbol Technologies, Inc. | Method for locating mobile units based on received signal strength ratio |
US7346358B2 (en) * | 2002-06-24 | 2008-03-18 | Intel Corporation | Logical boundaries in communications networks |
US6933849B2 (en) * | 2002-07-09 | 2005-08-23 | Fred Sawyer | Method and apparatus for tracking objects and people |
US7254310B2 (en) * | 2002-07-25 | 2007-08-07 | Microsoft Corporation | Clock-slaving in a programmable video recorder |
KR100734998B1 (ko) * | 2002-08-15 | 2007-07-03 | 인터내셔널 비지네스 머신즈 코포레이션 | 무선 네트워크에서 위치 인식을 지원하기 위한 트랜스폰더서브시스템 |
US20040203870A1 (en) * | 2002-08-20 | 2004-10-14 | Daniel Aljadeff | Method and system for location finding in a wireless local area network |
US20040043797A1 (en) * | 2002-08-30 | 2004-03-04 | Shostak Robert E. | Method and apparatus for power conservation in a wireless communication system |
JP3801123B2 (ja) | 2002-09-06 | 2006-07-26 | 株式会社日立製作所 | 無線システムおよびそのサーバーならびにその基地局 |
US7289813B2 (en) * | 2002-09-12 | 2007-10-30 | Broadcom Corporation | Using signal-generated location information to identify and list available devices |
US20040203989A1 (en) * | 2002-09-12 | 2004-10-14 | Broadcom Corporation | Using location information to control transmission signal levels of wireless devices |
WO2004027445A1 (en) * | 2002-09-17 | 2004-04-01 | Broadcom Corporation | Method and system for location based configuration of a wireless access point (wap) and an access device in a hybrid wired/wireless network |
US8315211B2 (en) * | 2002-09-17 | 2012-11-20 | Broadcom Corporation | Method and system for location based configuration of a wireless access point (WAP) and an access device in a hybrid wired/wireless network |
US6963289B2 (en) * | 2002-10-18 | 2005-11-08 | Aeroscout, Ltd. | Wireless local area network (WLAN) channel radio-frequency identification (RFID) tag system and method therefor |
US7522049B2 (en) * | 2002-10-18 | 2009-04-21 | Aeroscout, Ltd. | Wireless local area network (WLAN) method and system for presence detection and location finding |
AU2003294416A1 (en) | 2002-11-27 | 2004-06-23 | Cognio, Inc | System and method for locating sources of unknown wireless radio signals |
US7212828B2 (en) * | 2002-12-31 | 2007-05-01 | International Business Machines Corporation | Monitoring changeable locations of client devices in wireless networks |
US20040203910A1 (en) * | 2002-12-31 | 2004-10-14 | International Business Machines Corporation | Spatial boundary admission control for wireless networks |
BRPI0406633A (pt) * | 2003-01-09 | 2005-12-06 | Thomson Licensing Sa | Método e aparelho para a sincronização de vìdeo digital utilizando um pacote de radiofaróis |
US7853250B2 (en) | 2003-04-03 | 2010-12-14 | Network Security Technologies, Inc. | Wireless intrusion detection system and method |
FR2857102B1 (fr) * | 2003-07-04 | 2007-06-15 | Nortel Networks Ltd | Procede de mesure de l'instant d'arrivee d'un signal radio recu, dispositif de mesure et dispositif de localisation d'une station mobile pour la mise en oeuvre du procede |
CN1830177B (zh) * | 2003-08-01 | 2012-01-25 | Nxp股份有限公司 | 用于无线设备的bss切换模块 |
US7349544B2 (en) * | 2003-09-22 | 2008-03-25 | Blueleaf Llc | Wireless perimeter security device and network using same |
JP2005130154A (ja) * | 2003-10-23 | 2005-05-19 | Hitachi Ltd | 移動体端末測位システムにおける基地局装置 |
US7218229B2 (en) * | 2003-11-07 | 2007-05-15 | Wherenet Corp | Location system and method that achieves time synchronized network performance with nodes divided into separate networks |
US7127258B2 (en) * | 2003-11-10 | 2006-10-24 | Symbol Technologies, Inc. | WLAN roaming based on location |
GB0327794D0 (en) * | 2003-11-29 | 2003-12-31 | Koninkl Philips Electronics Nv | Positioning method and apparatus |
WO2005057834A2 (en) * | 2003-12-09 | 2005-06-23 | Awarepoint Corporation | Plug-in network appliance |
US7653119B2 (en) * | 2003-12-18 | 2010-01-26 | Intel Corporation | Extending orthogonal frequency division multiplexed wireless local area networks using direct sequence spread spectrum/complementary code keying |
US7356618B2 (en) * | 2003-12-31 | 2008-04-08 | Intel Corporation | Method and system for synchronizing platform clocks in a distributed wireless platform |
US7197658B2 (en) * | 2003-12-31 | 2007-03-27 | Intel Corporation | Synchronizing samples of a multimedia stream with a system clock |
US6909399B1 (en) | 2003-12-31 | 2005-06-21 | Symbol Technologies, Inc. | Location system with calibration monitoring |
US7266713B2 (en) * | 2004-01-09 | 2007-09-04 | Intel Corporation | Apparatus and method for adaptation of time synchronization of a plurality of multimedia streams |
WO2005067686A2 (en) * | 2004-01-12 | 2005-07-28 | Andrew Corporation | Method and apparatus for synchronizing wireless location servers |
US7630323B2 (en) * | 2004-03-11 | 2009-12-08 | Symbol Technologies, Inc. | Self-configuring wireless personal area network |
US7302269B1 (en) * | 2004-03-18 | 2007-11-27 | Cisco Technology, Inc. | Radiolocation in a wireless network using time difference of arrival |
US7388857B2 (en) * | 2004-04-12 | 2008-06-17 | Samsung Electronics Co., Ltd. | Method and system for synchronizing two end terminals using beacon synchronization with multiple channels in a wireless local area network |
US7404520B2 (en) * | 2004-04-28 | 2008-07-29 | Symbol Technologies, Inc. | System and method for providing location information in transaction processing |
US7499423B1 (en) * | 2004-06-10 | 2009-03-03 | Cisco Technology, Inc. (Us) | System and method for clock distribution and synchronization and radio location |
US7221913B2 (en) * | 2004-06-23 | 2007-05-22 | Intel Corporation | Effective time-of-arrival estimation algorithm for multipath environment |
US7155238B2 (en) * | 2004-07-06 | 2006-12-26 | Katz Daniel A | Wireless location determining device |
US7619522B2 (en) * | 2004-11-17 | 2009-11-17 | Destron Fearing Corporation | Radio frequency animal tracking system |
JP4179287B2 (ja) * | 2005-01-25 | 2008-11-12 | セイコーエプソン株式会社 | 測位システム、端末装置、端末装置の制御方法及び端末装置の制御プログラム |
US7363137B2 (en) * | 2005-02-03 | 2008-04-22 | Lincoln Global, Inc. | Construction equipment discovery on a network |
US7174172B2 (en) * | 2005-02-25 | 2007-02-06 | Symbol Technologies, Inc. | System and method for asset location in wireless networks |
ES2605370T3 (es) | 2005-03-18 | 2017-03-14 | Gatekeeper Systems, Inc. | Sistema de comunicación bidireccional para rastrear localizaciones y estados de vehículos con ruedas |
US7877101B1 (en) * | 2006-12-28 | 2011-01-25 | Marvell International Ltd. | Locating a WLAN station using signal propagation delay |
US7920544B2 (en) | 2005-03-28 | 2011-04-05 | Qualcomm Incorporated | Method and apparatus for enhancing signal-to-noise ratio of position location measurements |
US20060274641A1 (en) * | 2005-04-04 | 2006-12-07 | Interdigital Technology Corporation | Method and apparatus for constant envelope orthogonal frequency division multiplexing in a wireless system |
WO2006112831A1 (en) * | 2005-04-15 | 2006-10-26 | Mitsubishi Electric Research Laboratories | Method and system for estimating time of arrival of signals using multiple different time scales |
US7710322B1 (en) | 2005-05-10 | 2010-05-04 | Multispectral Solutions, Inc. | Extensible object location system and method using multiple references |
US7606524B1 (en) * | 2005-05-20 | 2009-10-20 | Rockwell Collins, Inc. | Integrated monitoring and communications receiver architecture |
US7817604B2 (en) * | 2005-06-13 | 2010-10-19 | Telefonaktiebolaget L M Ericsson (Publ) | Shared control channel detection strategies |
US7271764B2 (en) * | 2005-06-30 | 2007-09-18 | Intel Corporation | Time of arrival estimation mechanism |
US10003685B2 (en) | 2005-07-14 | 2018-06-19 | Binj Laboratories, Inc. | Systems and methods for detecting and controlling transmission devices |
US9066194B2 (en) | 2005-07-14 | 2015-06-23 | Binj Laboratories, Inc. | System and method for detecting and controlling transmission devices |
US9037098B2 (en) * | 2007-08-30 | 2015-05-19 | Binj Laboratories, Inc. | System and method for wrist band transmitter and system thereof |
US11304123B1 (en) | 2005-07-14 | 2022-04-12 | Binj Laboratories, Inc. | Systems and methods for detecting and controlling transmission devices |
US8238936B2 (en) | 2006-07-14 | 2012-08-07 | Binj Laboratories, Inc. | Method and system for tracking and determining a location of a wireless transmission |
US8626195B2 (en) | 2005-07-14 | 2014-01-07 | Binj Laboratories, Inc. | Systems and methods for detecting and controlling transmission devices |
US10735576B1 (en) * | 2005-07-14 | 2020-08-04 | Binj Laboratories, Inc. | Systems and methods for detecting and controlling transmission devices |
US9226259B2 (en) | 2005-07-14 | 2015-12-29 | Binj Laboratories, Inc. | Systems and methods for detecting and controlling transmission devices |
US8983446B2 (en) | 2005-07-14 | 2015-03-17 | Binj Laboratories, Inc. | Systems and methods for the detection and allowance of transmission facilities |
US9936442B1 (en) | 2005-07-14 | 2018-04-03 | Binj Laboratories, Inc. | System and method for wrist band transmitter and system thereof |
US8078190B2 (en) | 2005-07-14 | 2011-12-13 | Binj Laboratories, Inc. | Systems and methods for detection of transmission facilities |
US9197993B2 (en) | 2005-07-14 | 2015-11-24 | Binj Laboratories, Inc | System and method for detecting and controlling transmission devices |
US7746939B2 (en) * | 2005-07-29 | 2010-06-29 | Itt Manufacturing Enterprises, Inc. | Methods and apparatus for encoding information in a signal by spectral notch modulation |
US7483412B2 (en) | 2005-07-29 | 2009-01-27 | Microsoft Corporation | Range extension between two wireless devices |
US8767595B2 (en) * | 2005-08-02 | 2014-07-01 | L-3 Communications Corporation | Enhanced methods of cellular environment detection when interoperating with timed interfers |
WO2007016641A2 (en) * | 2005-08-02 | 2007-02-08 | Comhouse Wireless, Lp | Methods of remotely identifying, suppressing and/or disabling wireless devices of interest |
US7706822B2 (en) * | 2005-08-24 | 2010-04-27 | Motorola, Inc. | Timing synchronization and beacon generation for mesh points operating in a wireless mesh network |
DE102005041453B4 (de) | 2005-08-31 | 2007-06-28 | Siemens Ag | Verfahren und Anordnung zur Ortung eines mobilen Endgerätes in einer Mehrzellen-Funkanordnung |
US20070074226A1 (en) * | 2005-09-28 | 2007-03-29 | Zimmer Vincent J | Systems and methods for device driver isolation |
US7653004B2 (en) * | 2005-11-30 | 2010-01-26 | Motorola, Inc. | Method and system for improving time of arrival (TOA) measurements in a wireless communication network |
JP2007187639A (ja) * | 2006-01-16 | 2007-07-26 | Fujitsu Ltd | 無線測位システム |
US9274207B2 (en) | 2006-02-01 | 2016-03-01 | Zih Corp. | System and method for determining signal source location in wireless local area network |
US7570212B2 (en) * | 2006-04-07 | 2009-08-04 | The Boeing Company | Reference beacon methods and apparatus for TDOA/FDOA geolocation |
FR2902195B1 (fr) * | 2006-06-09 | 2010-04-09 | Thales Sa | Procede de determination de l'instant d'arrivee d'un signal radioelectrique non impulsionnel et systeme de localisation geographique d'emetteurs de signaux radioelectriques non impulsionnels |
US20070296583A1 (en) * | 2006-06-21 | 2007-12-27 | Broadcom Corporation, A California Corporation | Integrated circuit assembly including RFID and components thereof |
US7812617B2 (en) * | 2006-07-07 | 2010-10-12 | Sital Technology & Hw Design 1997 Ltd. | System and method for detecting and locating faults in electronic communication bus systems |
US10103806B1 (en) * | 2017-06-05 | 2018-10-16 | Binj Laboratories, Inc. | System and method for wrist band transmitter and system thereof |
US10251149B2 (en) * | 2006-07-14 | 2019-04-02 | Binj Laboratories, Inc. | Method and system for tracking and determining a location of a wireless transmission |
US8755770B2 (en) * | 2006-08-01 | 2014-06-17 | L-3 Communications Corporation | Methods for identifying wireless devices connected to potentially threatening devices |
US7574221B2 (en) * | 2006-08-03 | 2009-08-11 | Ntt Docomo, Inc. | Method for estimating jointly time-of-arrival of signals and terminal location |
US20080045158A1 (en) * | 2006-08-15 | 2008-02-21 | Samsung Electronics Co., Ltd. | Method And System For Transmitting A Beacon Signal In A Wireless Network |
US20100226308A1 (en) * | 2006-08-15 | 2010-09-09 | Comhouse Wireless Lp | node- arbitrated media access control protocol for ad hoc broadcast networks carrying ephemeral information |
KR101387500B1 (ko) * | 2006-08-22 | 2014-04-21 | 엘지전자 주식회사 | 무선 통신 시스템에서의 제어정보 전송 및 수신 방법 |
US7970534B2 (en) | 2006-08-24 | 2011-06-28 | Blackbird Technologies, Inc. | Mobile unit and system having integrated mapping, communications and tracking |
US7826538B1 (en) * | 2006-08-31 | 2010-11-02 | Dgi Creations, Llc | Remote determination of network transmitter identity and output strength |
US7746766B2 (en) * | 2006-09-21 | 2010-06-29 | Sharp Laboratories Of America, Inc. | Systems and methods for obtaining an optimum transmission format of reference signals to maximize capacity and minimize peak to average power ratio |
US7664010B2 (en) | 2006-09-21 | 2010-02-16 | Sharp Laboratories Of America, Inc. | Systems and methods for combining reference and data signals to reduce peak to average power ratio for coherent communication systems |
US8116783B2 (en) * | 2006-09-22 | 2012-02-14 | Rockstar Bidco Lp | Method and apparatus for determining the location of a wireless client device on a wireless network |
US7852826B2 (en) * | 2006-09-29 | 2010-12-14 | Intel Corporation | Techniques to communication MAP information elements in a wireless network |
US7844280B2 (en) * | 2006-12-12 | 2010-11-30 | Trueposition, Inc. | Location of wideband OFDM transmitters with limited receiver bandwidth |
US20080130794A1 (en) * | 2006-12-04 | 2008-06-05 | Chia-Chin Chong | Method for optimum threshold selection of time-of-arrival estimators |
US11393358B2 (en) | 2007-02-07 | 2022-07-19 | Skyhawke Technologies, Llc | Coaching aid for golf |
US9295895B2 (en) | 2007-02-07 | 2016-03-29 | Skyhawker Technologies, LLC | Coaching aid for golf |
US8155662B2 (en) * | 2007-02-19 | 2012-04-10 | Microsoft Corporation | Self-configuring wireless network location system |
US7516049B2 (en) * | 2007-02-19 | 2009-04-07 | Microsoft Corporation | Wireless performance analysis system |
US9014765B2 (en) * | 2007-02-28 | 2015-04-21 | Intel Corporation | Mobile platform tracking in wireless networks |
US7391368B1 (en) | 2007-03-06 | 2008-06-24 | Cisco Technology, Inc. | Determining the time of arrival of a wireless signal |
US7843335B2 (en) | 2007-03-13 | 2010-11-30 | Blackbird Technologies, Inc. | Mobile asset tracking unit, system and method |
TWI398150B (zh) * | 2007-03-23 | 2013-06-01 | Via Tech Inc | 鄰近通信小區之同步方法和裝置 |
US8457178B2 (en) * | 2007-03-26 | 2013-06-04 | Qualcomm Incorporated | Frequency offset estimator |
US8208587B2 (en) * | 2007-04-27 | 2012-06-26 | Ntt Docomo, Inc. | Method and system for joint time-of-arrival and amplitude estimation based on a super-resolution technique |
CN100581094C (zh) * | 2007-05-24 | 2010-01-13 | 北京泛亚创知科技发展有限公司 | 一种短程无线通信网络的网络时钟同步方法 |
US7848271B2 (en) * | 2007-06-26 | 2010-12-07 | Research In Motion Limited | System and method for conserving power for a wireless device while maintaining a connection to a network |
US20090033494A1 (en) * | 2007-07-31 | 2009-02-05 | Symbol Technologies, Inc. | Vehicular mobile rf tags |
US20090036104A1 (en) * | 2007-07-31 | 2009-02-05 | Symbol Technologies, Inc. | Mobile rf tags locatable using cell phone |
CA2704264C (en) | 2007-11-02 | 2015-03-17 | Novatel Inc. | System and method for distributing accurate time and frequency over a network |
JP5383693B2 (ja) | 2007-11-13 | 2014-01-08 | ノヴァテル インコーポレイテッド | ネットワークにわたって位置を定めるためのシステム |
KR100946984B1 (ko) * | 2007-12-10 | 2010-03-10 | 한국전자통신연구원 | 위치추적 시스템 및 방법 |
JP5243786B2 (ja) * | 2007-12-28 | 2013-07-24 | サンリツオートメイション株式会社 | リモートi/oシステム及びリモートi/oシステムにおける時刻同期方法 |
US7502619B1 (en) * | 2008-01-22 | 2009-03-10 | Katz Daniel A | Location determination of low power wireless devices over a wide area |
JP2009186241A (ja) * | 2008-02-04 | 2009-08-20 | Sumitomo Electric Ind Ltd | 受信装置、測距システム、測位システム、コンピュータプログラム及び受信時点特定方法 |
US20110023079A1 (en) | 2008-03-20 | 2011-01-27 | Mark Alan Schultz | System and method for processing priority transport stream data in real time in a multi-channel broadcast multimedia system |
US8335173B2 (en) | 2008-04-11 | 2012-12-18 | Cisco Technology, Inc. | Inserting time of departure information in frames to support multi-channel location techniques |
WO2009140768A1 (en) | 2008-05-22 | 2009-11-26 | Novatel Inc. | Gnss receiver using signals of opportunity and assistance information to reduce the time to first fix |
US8090616B2 (en) | 2008-09-08 | 2012-01-03 | Proctor Jr James Arthur | Visual identification information used as confirmation in a wireless communication |
US8614975B2 (en) | 2008-09-19 | 2013-12-24 | Qualcomm Incorporated | Synchronizing a base station in a wireless communication system |
EP2169418A1 (en) * | 2008-09-26 | 2010-03-31 | France Telecom | Method and system for estimating the location of a mobile terminal |
US8073463B2 (en) * | 2008-10-06 | 2011-12-06 | Andrew, Llc | System and method of UMTS UE location using uplink dedicated physical control channel and downlink synchronization channel |
US9037155B2 (en) * | 2008-10-28 | 2015-05-19 | Sven Fischer | Time of arrival (TOA) estimation for positioning in a wireless communication network |
KR20110087210A (ko) * | 2008-11-07 | 2011-08-02 | 톰슨 라이센싱 | 멀티채널 방송 멀티미디어 시스템에서 컨텐트 스트림 필터링을 제공하기 위한 시스템 및 방법 |
US8982851B2 (en) | 2009-01-06 | 2015-03-17 | Qualcomm Incorporated | Hearability improvements for reference signals |
US8570150B1 (en) | 2009-01-07 | 2013-10-29 | Doug Bowen | Sensing system and method with integral sensor locating capability |
US8126405B2 (en) * | 2009-02-10 | 2012-02-28 | Mitsubishi Electric Research Laboratory, Inc. | Method for estimating condition of wireless channels |
CN101494874B (zh) * | 2009-03-03 | 2011-03-16 | 华为终端有限公司 | Toa估计方法及装置 |
US8577387B2 (en) * | 2009-03-17 | 2013-11-05 | Qualcomm Incorporated | Position location using multiple carriers |
WO2011016804A1 (en) * | 2009-08-05 | 2011-02-10 | Andrew Llc | System and method for hybrid location in an lte network |
JP5304526B2 (ja) * | 2009-08-11 | 2013-10-02 | 株式会社ナカヨ通信機 | ウェイクアップ電波送信機能を有する無線アクセスポイントおよび無線lan端末 |
JP5287602B2 (ja) * | 2009-08-26 | 2013-09-11 | 株式会社ナカヨ通信機 | 特定周波数監視による低待受電力型無線通信システム |
US20110050501A1 (en) * | 2009-08-31 | 2011-03-03 | Daniel Aljadeff | Location system and method with a fiber optic link |
US8526395B2 (en) * | 2009-09-04 | 2013-09-03 | L-3 Communications Corporation | Using code channel overrides to suppress CDMA wireless devices |
US8531288B1 (en) | 2009-11-09 | 2013-09-10 | Carnegie Mellon University | System and method for collaborative resource tracking |
US20110205025A1 (en) * | 2010-02-23 | 2011-08-25 | Sirit Technologies Inc. | Converting between different radio frequencies |
DE102010029349A1 (de) * | 2010-05-27 | 2011-12-01 | Robert Bosch Gmbh | Steuereinheit zum Austausch von Daten mit einer Peripherieeinheit, Peripherieeinheit, und Verfahren zum Datenaustausch |
US9091746B2 (en) | 2010-07-01 | 2015-07-28 | Qualcomm Incorporated | Determination of positions of wireless transceivers to be added to a wireless communication network |
US8605830B2 (en) * | 2010-07-30 | 2013-12-10 | National Instruments Corporation | Blind carrier/timing recovery and detection of modulation scheme |
EP2420855A1 (en) * | 2010-08-20 | 2012-02-22 | EPFL Ecole Polytechnique Fédérale de Lausanne | Location system and corresponding calibration method |
US9014172B2 (en) * | 2010-11-02 | 2015-04-21 | Diani Systems, Inc. | High resolution wireless indoor positioning system for legacy standards-based narrowband mobile radios |
US8265011B2 (en) * | 2010-11-02 | 2012-09-11 | Diani Systems, Inc. | High resolution wireless indoor positioning system for legacy standards-based narrowband mobile radios |
GB201105902D0 (en) | 2011-04-07 | 2011-05-18 | Sonitor Technologies As | Location system |
US8538373B2 (en) | 2011-05-25 | 2013-09-17 | Blackbird Technologies, Inc. | Methods and apparatus for emergency tracking |
US10135667B1 (en) * | 2011-06-08 | 2018-11-20 | Kerry L. Greer | System and method for increased indoor position tracking accuracy |
FR2980327B1 (fr) * | 2011-09-15 | 2016-07-01 | Pole Star | Dispositif et methode de collecte d'informations relatives a des points d'acces |
KR101921228B1 (ko) | 2011-09-23 | 2019-02-13 | 알엑스 네트웍스 아이엔씨. | 모바일 장치의 지오-레퍼런스 기반한 포지셔닝 |
CN102395146B (zh) * | 2011-12-09 | 2014-03-12 | 中国科学院上海微***与信息技术研究所 | 一种面向多目标点监测的无线传感网感知拓扑构建方法 |
CA2881963C (en) * | 2011-12-21 | 2017-01-03 | Otodata Wireless Network Inc. | Method and system for estimating a position of a target using a plurality of smartphones |
US9697159B2 (en) * | 2011-12-27 | 2017-07-04 | Intel Corporation | Multi-protocol I/O interconnect time synchronization |
US9282471B2 (en) * | 2012-03-21 | 2016-03-08 | Digimarc Corporation | Positioning systems for wireless networks |
US9279878B2 (en) | 2012-03-27 | 2016-03-08 | Microsoft Technology Licensing, Llc | Locating a mobile device |
US9057774B2 (en) | 2012-04-05 | 2015-06-16 | Raytheon Company | Position determination using local time difference |
KR101333949B1 (ko) | 2012-06-29 | 2013-11-27 | 이화여자대학교 산학협력단 | 위치정보행렬을 활용한 네트워크 코딩된 데이터의 근사 복호화 방법 |
EP2867691B1 (fr) * | 2012-06-29 | 2016-11-02 | Blinksight | Dispositif et procédé de localisation d'un émetteur rfid |
US10270642B2 (en) * | 2012-12-05 | 2019-04-23 | Origin Wireless, Inc. | Method, apparatus, and system for object tracking and navigation |
US8976842B1 (en) * | 2012-11-02 | 2015-03-10 | Comtech Ef Data Corp. | PN code sync detection and carrier frequency offset estimation for the direct sequence spread spectrum receiver |
US9058135B1 (en) * | 2012-11-12 | 2015-06-16 | Xilinx, Inc. | Synchronization of timers across clock domains in a digital system |
JP5949491B2 (ja) * | 2012-11-20 | 2016-07-06 | 富士ゼロックス株式会社 | 情報処理装置及びプログラム |
US9612121B2 (en) | 2012-12-06 | 2017-04-04 | Microsoft Technology Licensing, Llc | Locating position within enclosure |
EP2951608B1 (en) | 2013-01-31 | 2021-03-10 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Determining a position of a mobile communication device |
TWI509577B (zh) * | 2013-05-23 | 2015-11-21 | Pingtung Christian Hospital | 協尋系統 |
CN104378818A (zh) * | 2013-08-13 | 2015-02-25 | 中兴通讯股份有限公司 | 一种时钟同步方法及装置、基站子*** |
US9830424B2 (en) | 2013-09-18 | 2017-11-28 | Hill-Rom Services, Inc. | Bed/room/patient association systems and methods |
KR20150130845A (ko) * | 2014-05-14 | 2015-11-24 | 삼성전자주식회사 | 전자장치의 위치 측정 장치 및 방법 |
US10488505B2 (en) * | 2014-05-30 | 2019-11-26 | The Boeing Company | Positioning in indoor locations and other GPS-denied environments |
US9504003B2 (en) * | 2014-06-18 | 2016-11-22 | Broadcom Corporation | Arrival-delta position determination |
US9306727B2 (en) | 2014-07-22 | 2016-04-05 | Raytheon Company | System and method for synchronizing ground clocks |
CN104168642A (zh) * | 2014-09-04 | 2014-11-26 | 南京沃旭通讯科技有限公司 | 一种基于无线同步的tdoa一维高精度定位方法及*** |
US20160135136A1 (en) * | 2014-11-11 | 2016-05-12 | Mediatek Inc. | Joint Position Detection by Sensor Devices |
FR3030772B1 (fr) * | 2014-12-19 | 2020-11-06 | Amesys | Methode de localisation d'un emetteur de position inconnue avec des recepteurs synchronises de positions connues |
US10542507B2 (en) | 2015-03-13 | 2020-01-21 | Qualcomm Incorporated | Discovery and synchronization channels for user-tracking zones in a cellular network |
JP6443227B2 (ja) * | 2015-06-08 | 2018-12-26 | 株式会社デンソー | 通信システム |
CN105163383B (zh) * | 2015-06-30 | 2019-01-11 | 江苏鸿信***集成有限公司 | 一种基于蓝牙室内的信息推送方法 |
US10749778B2 (en) | 2015-07-28 | 2020-08-18 | Acorn Technologies, Inc. | Communication system determining time of arrival using matching pursuit |
US9848383B2 (en) * | 2015-10-16 | 2017-12-19 | Symbol Technologies, Llc | Arrangement for, and method of, conserving battery power in a Bluetooth low energy beacon |
CN108352912B (zh) * | 2015-11-09 | 2020-07-07 | 智加***公司 | 用于使多个设备同步并且基于已同步设备确定定位的方法 |
US9723588B1 (en) * | 2016-03-28 | 2017-08-01 | Google Inc. | Determining a location of a wireless transmitter |
CN106656368A (zh) * | 2017-02-13 | 2017-05-10 | 中国联合网络通信集团有限公司 | 通信***监控方法及装置 |
WO2018183038A1 (en) * | 2017-03-29 | 2018-10-04 | Becton, Dickinson And Company | Systems, apparatuses and methods for secure inductive pairing between two devices |
GB2562253B (en) | 2017-05-09 | 2021-11-03 | Imagination Tech Ltd | Efficient detection of ranging code correlation function of a GNSS signal |
CN107548028A (zh) * | 2017-08-02 | 2018-01-05 | 福州市协成智慧科技有限公司 | 一种室内人员移动轨迹计算***及方法 |
GB201713639D0 (en) * | 2017-08-24 | 2017-10-11 | Sonitor Technologies As | Position determining system |
CN107589401B (zh) * | 2017-09-05 | 2020-12-04 | 成都精位科技有限公司 | 自适应组网方法、定位***及定位基站 |
EP3692386B1 (en) * | 2017-10-07 | 2021-12-08 | The Provost, Fellows, Scholars and other Members of Board of Trinity College Dublin | System and method to enhance ranging resolution for localization of a lora sensor or device |
CN108093474B (zh) * | 2017-12-27 | 2020-09-29 | 重庆脉实智能制造有限公司 | 利用虚拟时间同步实现室内定位的方法及*** |
US11160023B2 (en) * | 2018-01-10 | 2021-10-26 | Kyocera Corporation | Transmission of wake-up signal to mobile devices at alternate carrier frequency |
US10904076B2 (en) * | 2018-05-30 | 2021-01-26 | International Business Machines Corporation | Directing functioning of an object based on its association to another object in an environment |
KR102546646B1 (ko) * | 2018-08-28 | 2023-06-23 | 매그나칩 반도체 유한회사 | 오실레이터 주파수 컨트롤러를 포함하는 디스플레이 구동 ic |
EP3668197B1 (en) | 2018-12-12 | 2021-11-03 | Rohde & Schwarz GmbH & Co. KG | Method and radio for setting the transmission power of a radio transmission |
US11019567B2 (en) * | 2019-02-26 | 2021-05-25 | Chadra Laboratories Llc | Multi-interface transponder device-altering power modes |
US11911325B2 (en) | 2019-02-26 | 2024-02-27 | Hill-Rom Services, Inc. | Bed interface for manual location |
US11259058B2 (en) * | 2019-03-25 | 2022-02-22 | Apple Inc. | Use of rendered media to assess delays in media distribution systems |
JP7275940B2 (ja) * | 2019-07-08 | 2023-05-18 | オムロン株式会社 | 制御プログラムおよび方法 |
JP7238647B2 (ja) * | 2019-07-08 | 2023-03-14 | オムロン株式会社 | 信号処理装置 |
CN110519686B (zh) * | 2019-08-28 | 2021-03-30 | 中国联合网络通信集团有限公司 | 预设地点识别方法、装置、设备及计算机可读存储介质 |
US11622234B2 (en) | 2019-09-13 | 2023-04-04 | Troverlo, Inc. | Passive asset tracking using observations of Wi-Fi access points |
US11917488B2 (en) | 2019-09-13 | 2024-02-27 | Troverlo, Inc. | Passive asset tracking using observations of pseudo Wi-Fi access points |
US11589187B2 (en) | 2019-09-13 | 2023-02-21 | Troverlo, Inc. | Passive sensor tracking using observations of Wi-Fi access points |
US10915137B1 (en) | 2019-10-11 | 2021-02-09 | Scientific Innovations, Inc. | Estimation of clock synchronization errors using time difference of arrival |
CN116830688A (zh) * | 2020-12-08 | 2023-09-29 | 诺基亚技术有限公司 | 用于定位的频率参考调整补偿 |
CN112867145B (zh) * | 2021-01-08 | 2021-12-07 | 腾讯科技(深圳)有限公司 | 基站定位方法、装置、计算机设备和存储介质 |
US11831943B2 (en) * | 2021-10-26 | 2023-11-28 | Apple Inc. | Synchronized playback of media content |
US11785285B1 (en) * | 2022-05-20 | 2023-10-10 | Lenbrook Industries Limited | Audio video receiver (AVR) architecture |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5917449A (en) * | 1995-06-07 | 1999-06-29 | Sanconix Inc. | Enhanced position calculation |
Family Cites Families (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3714573A (en) * | 1970-05-06 | 1973-01-30 | Hazeltine Corp | Spread-spectrum position monitoring system |
AT330845B (de) * | 1971-07-28 | 1976-07-26 | Siemens Ag | Verfahren zur standortbestimmung von fahrzeugen |
US4799062A (en) * | 1987-04-27 | 1989-01-17 | Axonn Corporation | Radio position determination method and apparatus |
US5150310A (en) * | 1989-08-30 | 1992-09-22 | Consolve, Inc. | Method and apparatus for position detection |
DE4006245A1 (de) * | 1990-02-28 | 1991-08-29 | Bayer Ag | Weiche polyamide und ihre verwendung |
US5119104A (en) * | 1990-05-04 | 1992-06-02 | Heller Alan C | Location system adapted for use in multipath environments |
US5216429A (en) * | 1991-04-17 | 1993-06-01 | Ricoh Company, Ltd. | Position measuring system using pseudo-noise signal transmission and reception |
US5365516A (en) | 1991-08-16 | 1994-11-15 | Pinpoint Communications, Inc. | Communication system and method for determining the location of a transponder unit |
US5596330A (en) * | 1992-10-15 | 1997-01-21 | Nexus Telecommunication Systems Ltd. | Differential ranging for a frequency-hopped remote position determination system |
US5469409A (en) * | 1994-03-14 | 1995-11-21 | Motorola, Inc. | Method for clock calibration in a position determination system |
US5742635A (en) * | 1994-05-05 | 1998-04-21 | Sanconix, Inc. | Enhanced time of arrival method |
US5512908A (en) * | 1994-07-08 | 1996-04-30 | Lockheed Sanders, Inc. | Apparatus and method for locating cellular telephones |
US5525081A (en) | 1994-07-20 | 1996-06-11 | Pinpoint Corporation | Transducer system for trolling motor |
US5508708A (en) * | 1995-05-08 | 1996-04-16 | Motorola, Inc. | Method and apparatus for location finding in a CDMA system |
US5588005A (en) | 1995-06-07 | 1996-12-24 | General Electric Company | Protocol and mechanism for primary and mutter mode communication for asset tracking |
US5719584A (en) * | 1996-09-03 | 1998-02-17 | Harris Corporation | System and method for determining the geolocation of a transmitter |
AU4338597A (en) * | 1996-09-09 | 1998-03-26 | Dennis Jay Dupray | Location of a mobile station using a plurality of commercial wireless infrastructures |
US5890068A (en) * | 1996-10-03 | 1999-03-30 | Cell-Loc Inc. | Wireless location system |
JP3147306B2 (ja) | 1996-10-17 | 2001-03-19 | ピンポイント コーポレイション | 物品追跡システム |
CA2218805A1 (en) * | 1996-12-31 | 1998-06-30 | R. Anthony Shober | Passenger, baggage, and cargo reconciliation system |
US5917440A (en) | 1996-12-31 | 1999-06-29 | Lucent Technologies Inc. | Implementing transmission zeroes in narrowband sigma-delta A/D converters |
US5920287A (en) * | 1997-01-21 | 1999-07-06 | Widata Corporation | Radio location system for precisely tracking objects by RF transceiver tags which randomly and repetitively emit wideband identification signals |
AU738573B2 (en) | 1997-05-09 | 2001-09-20 | Nokia Technologies Oy | A method for determining timing differences between radio transmitters and a radio network incorporating the same |
US6459704B1 (en) * | 1997-08-12 | 2002-10-01 | Spectrum Tracking Systems, Inc. | Method and system for radio-location determination |
US6268723B1 (en) | 1997-09-26 | 2001-07-31 | Wherenet Corporation | Magnetic field emission and differential receiver coil configuration for discriminating response magnetic field from transponder tag |
US6414634B1 (en) * | 1997-12-04 | 2002-07-02 | Lucent Technologies Inc. | Detecting the geographical location of wireless units |
AU2475299A (en) * | 1998-01-30 | 1999-08-16 | Widata Corporation | Radio location system including transceiver tags |
US6201499B1 (en) * | 1998-02-03 | 2001-03-13 | Consair Communications | Time difference of arrival measurement system |
WO1999057826A1 (en) * | 1998-05-04 | 1999-11-11 | Nokia Networks Oy | Method of synchronisation of a base station network |
EP1090371A1 (en) | 1998-06-24 | 2001-04-11 | Pinpoint Corporation | Dual mode tracking system |
JP3097078B2 (ja) * | 1998-07-21 | 2000-10-10 | 日本電気株式会社 | 無線パケット通信装置 |
US6330452B1 (en) * | 1998-08-06 | 2001-12-11 | Cell-Loc Inc. | Network-based wireless location system to position AMPs (FDMA) cellular telephones, part I |
US6463307B1 (en) * | 1998-08-14 | 2002-10-08 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for power saving in a mobile terminal with established connections |
WO2000011590A1 (en) | 1998-08-21 | 2000-03-02 | Pinpoint Corporation | Method and apparatus for transmitting data in a tracking system |
JP2000071987A (ja) * | 1998-08-28 | 2000-03-07 | Yokogawa Denshikiki Co Ltd | データキャリアシステムによる鉄道保安装置 |
WO2000014561A1 (en) | 1998-09-03 | 2000-03-16 | Wherenet, Inc. | Network for multi-lateration with circularly polarized antenna |
WO2000023956A1 (en) | 1998-10-22 | 2000-04-27 | University Of Maryland | Method and system for providing location dependent and personal identification information to a public safety answering point |
US6574244B1 (en) * | 1998-11-04 | 2003-06-03 | Trimble Navigation Limited | Determining time stamps in a data acquisition system |
US6308428B1 (en) | 1998-12-22 | 2001-10-30 | Pinpoint Laser Systems | Laser alignment system |
US6184829B1 (en) * | 1999-01-08 | 2001-02-06 | Trueposition, Inc. | Calibration for wireless location system |
WO2000046771A1 (en) | 1999-02-04 | 2000-08-10 | Pinpoint Corporation | Technique for filtering signals in a local positioning system |
US6317082B1 (en) | 1999-02-12 | 2001-11-13 | Wherenet Corp | Wireless call tag based material replenishment system |
WO2000048016A1 (en) | 1999-02-12 | 2000-08-17 | Wherenet, Inc. | Wireless call tag based material replenishment system |
WO2000052498A1 (en) | 1999-03-03 | 2000-09-08 | Pinpoint Corporation | Method and apparatus combining a tracking system and a wireless communication system |
JP3338793B2 (ja) * | 1999-04-23 | 2002-10-28 | エヌイーシーモバイリング株式会社 | 携帯無線端末位置情報表示方法 |
US6510186B1 (en) * | 1999-05-28 | 2003-01-21 | Nortel Networks Limited | Signal time of arrival estimation method and system |
WO2001006401A1 (en) | 1999-07-15 | 2001-01-25 | Pinpoint Corporation | Method and apparatus for mobile tag reading |
WO2001007928A1 (en) | 1999-07-27 | 2001-02-01 | Wherenet Corporation | Rgv (reader geometry visualization) tool |
US6456239B1 (en) | 1999-08-25 | 2002-09-24 | Rf Technologies, Inc. | Method and apparatus for locating mobile tags |
AU2298801A (en) | 1999-10-21 | 2001-04-30 | Pinpoint Corporation | Method and apparatus for low cost asset location |
US6347095B1 (en) | 1999-11-15 | 2002-02-12 | Pango Networks, Inc. | System, devices and methods for use in proximity-based networking |
WO2001050299A2 (en) | 1999-12-29 | 2001-07-12 | Pango Systems B.V. | System and method for incremental disclosure of personal information to content providers |
US20010030625A1 (en) * | 2000-01-12 | 2001-10-18 | Doles Daniel T. | Local clock-referenced DTOA geolocation system with wireless infrastructure |
AU2001238410A1 (en) | 2000-02-17 | 2001-08-27 | Pinpoint Corporation | Method and apparatus for integrating wireless communication and asset location |
AU2001243483A1 (en) | 2000-03-07 | 2001-09-17 | Wherenet Corp | Ultra-sensitive magnetic field receiver capable of operating in high noise environments |
EP1279128A4 (en) | 2000-03-07 | 2003-10-29 | Wherenet Corp | OPERATIONS AND BUSINESS PROCESSES CARRIED OUT THROUGH A WIRELESS GEOGRAPHICAL LOCATION SYSTEM INFRASTRUCTURE |
US6859485B2 (en) | 2000-03-07 | 2005-02-22 | Wherenet Corporation | Geolocation system with controllable tags enabled by wireless communications to the tags |
AU2001251022A1 (en) | 2000-03-27 | 2001-10-08 | Wherenet Corp | Use of rotating magnetic field to enhance communication with rf burst-transmitting tags of object location system |
DE10015041C2 (de) | 2000-03-27 | 2002-08-01 | Siemens Ag | Verfahren zur Signalisierung des Beginns eines logischen Kanals in einem gemeinsam genutzten physikalischen Übertragungskanal eines Funk-Kommunikationssystems und Vorrichtung zur Durchführung des Verfahrens |
US7310670B1 (en) | 2000-04-25 | 2007-12-18 | Thomson Licensing S.A. | Multi-channel power line exchange protocol |
US6593885B2 (en) | 2000-04-27 | 2003-07-15 | Wherenet Corp | Low cost DTOA location processing system based on multiple readers-to-single processor architecture |
-
2001
- 2001-11-14 CA CA2419796A patent/CA2419796C/en not_active Expired - Fee Related
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-
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-
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5917449A (en) * | 1995-06-07 | 1999-06-29 | Sanconix Inc. | Enhanced position calculation |
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