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1. 发明申请

US20080095131A1 METHOD AND SYSTEM FOR SYNCHRONIZATION OFFSET REDUCTION IN A TDOA LOCATION SYSTEM 有权
标题翻译：用于在TDOA位置系统中同步减少的方法和系统
公开(公告)号：US20080095131A1
公开(公告)日：2008-04-24
申请号：US11552211
申请日：2006-10-24
申请人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
发明人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
IPC分类号： H04B7/216
CPC分类号： H04B7/2681 , H04W56/0075
摘要： A method for reducing synchronization offset errors in a TDOA location finding wireless system, comprising: receiving transmissions from at least one sync unit at multiple location transceivers, wherein the multiple location transceivers are synchronized from the sync unit; determining actual times-of-arrival of the received transmissions in response to receiving transmissions; performing a wireless distance measurement between the transceivers and the at least one sync unit, the wireless distance measurement performed by the transceivers in response to the received transmissions from the at least one sync unit; computing an actual propagation time between the sync unit to the transceivers; computing differences between the actual propagation time and theoretical propagation time determined in conformity with the predetermined locations; estimating synchronization offset error of the transceivers in conformity with the computed differences; and correcting the synchronization offset error.
摘要翻译：一种用于减少TDOA定位无线系统中的同步偏移误差的方法，包括：从多个位置收发器处的至少一个同步单元接收传输，其中所述多位置收发器从所述同步单元同步; 响应于接收到的传输确定所接收的传输的实际到达时间; 在所述收发器和所述至少一个同步单元之间执行无线距离测量，响应于来自所述至少一个同步单元的接收到的传输，由所述收发器执行的所述无线距离测量; 计算同步单元到收发器之间的实际传播时间; 计算根据预定位置确定的实际传播时间和理论传播时间之间的差异; 根据计算出的差异估计收发器的同步偏移误差; 并校正同步偏移误差。

2. 发明申请

US20080186231A1 DUAL BANDWIDTH TIME DIFFERENCE OF ARRIVAL (TDOA) SYSTEM 有权
标题翻译：双波段时差（TDOA）系统
公开(公告)号：US20080186231A1
公开(公告)日：2008-08-07
申请号：US12025184
申请日：2008-02-04
申请人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi , Adi Shamir
发明人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi , Adi Shamir
IPC分类号： G01S1/20
CPC分类号： G01S5/06 , G01S5/0257
摘要： A wireless location system has at least one wireless tag to be located by the wireless location system, wherein the at least one wireless tag transmits two wireless signals having a known time relationship and having different bandwidths. A plurality of receivers is provided wherein a first receiver receives and processes a first of the two wireless signals and estimates a time to arrive (TOA) of the first wireless signal, and a second receiver receives and processes a second of the two wireless signals and estimates a TOA of the second wireless signal at the second transceiver. The plurality of receivers is time synchronized based on a common timing signal. A location server is coupled to each of the plurality of receivers. The location server receives the TOA of the first wireless signal from the first receiver and the TOA of the second wireless signal from the second receiver. The location server calculating a TDOA of the two wireless signals and estimates a position of the at least one wireless tag based on the TDOA
摘要翻译：无线定位系统具有由无线定位系统定位的至少一个无线标签，其中至少一个无线标签发送具有已知时间关系且具有不同带宽的两个无线信号。提供了多个接收机，其中第一接收机接收并处理两个无线信号中的第一个并且估计第一无线信号的到达时间（TOA），并且第二接收机接收并处理两个无线信号中的第二个，估计在第二收发器处的第二无线信号的TOA。多个接收机基于公共定时信号进行时间同步。位置服务器耦合到多个接收器中的每一个。位置服务器从第一接收机接收第一无线信号的TOA和来自第二接收机的第二无线信号的TOA。所述定位服务器计算所述两个无线信号的TDOA并且基于所述TDOA估计所述至少一个无线标签的位置

3. 发明授权

US08576829B2 Multi-channel TDOA system 有权
标题翻译：多通道TDOA系统
公开(公告)号：US08576829B2
公开(公告)日：2013-11-05
申请号：US11835553
申请日：2007-08-08
申请人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
发明人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
IPC分类号： H04J3/06
CPC分类号： H04W64/00 , G01S5/021 , G01S5/06 , H04W4/12 , H04W56/00 , H04W84/12
摘要： A wireless network has at least one wireless unit which transmits messages in multiple channels. The messages are synchronously transmitted using a transmit clock signal. The at least one wireless unit starting transmission of the messages at intervals consisting of at least one of one or multiple periods of the transmit clock signal. A plurality of location receivers are used for receiving the messages at different channels transmitted by the wireless units within the wireless network and determining a time of arrival for the received messages. At least one master unit is used for receiving the time of arrival from each of the location units. The location of the wireless unit is to be determined on the Time Difference Of Arrival (TDOA) of the transmitted messages at the location units.
摘要翻译：无线网络具有至少一个在多个信道中发送消息的无线单元。消息使用发送时钟信号同步发送。所述至少一个无线单元以由所述发送时钟信号的一个或多个周期中的至少一个构成的间隔开始所述消息的发送。多个位置接收机用于在由无线网络内的无线单元发送的不同信道上接收消息，并确定接收的消息的到达时间。至少一个主单元用于从每个位置单元接收到达时间。无线单元的位置将根据位置单位发送的消息的到达时间差（TDOA）来确定。

4. 发明申请

US20080037512A1 MULTI-CHANNEL TDOA SYSTEM 有权
标题翻译：多通道TDOA系统
公开(公告)号：US20080037512A1
公开(公告)日：2008-02-14
申请号：US11835553
申请日：2007-08-08
申请人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
发明人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
IPC分类号： H04J3/06
CPC分类号： H04W64/00 , G01S5/021 , G01S5/06 , H04W4/12 , H04W56/00 , H04W84/12
摘要： A wireless network has at least one wireless unit which transmits messages in multiple channels. The messages are synchronously transmitted using a transmit clock signal. The at least one wireless unit starting transmission of the messages at intervals consisting of at least one of one or multiple periods of the transmit clock signal. A plurality of location receivers are used for receiving the messages at different channels transmitted by the wireless units within the wireless network and determining a time of arrival for the received messages. At least one master unit is used for receiving the time of arrival from each of the location units. The location of the wireless unit is to be determined on the Time Difference Of Arrival (TDOA) of the transmitted messages at the location units.
摘要翻译：无线网络具有至少一个在多个信道中发送消息的无线单元。消息使用发送时钟信号同步发送。所述至少一个无线单元以由所述发送时钟信号的一个或多个周期中的至少一个构成的间隔开始所述消息的发送。多个位置接收机用于在由无线网络内的无线单元发送的不同信道上接收消息，并确定接收的消息的到达时间。至少一个主单元用于从每个位置单元接收到达时间。无线单元的位置将根据位置单位发送的消息的到达时间差（TDOA）来确定。

5. 发明授权

US08208939B2 Dual bandwidth time difference of arrival (TDOA) system 有权
标题翻译：双带宽到达时差（TDOA）系统
公开(公告)号：US08208939B2
公开(公告)日：2012-06-26
申请号：US12025184
申请日：2008-02-04
申请人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi , Adi Shamir
发明人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi , Adi Shamir
IPC分类号： H04W24/00
CPC分类号： G01S5/06 , G01S5/0257
摘要： A wireless location system has at least one wireless tag to be located by the wireless location system, wherein the at least one wireless tag transmits two wireless signals having a known time relationship and having different bandwidths. A plurality of receivers is provided wherein a first receiver receives and processes a first of the two wireless signals and estimates a time to arrive (TOA) of the first wireless signal, and a second receiver receives and processes a second of the two wireless signals and estimates a TOA of the second wireless signal at the second transceiver. The plurality of receivers is time synchronized based on a common timing signal. A location server is coupled to each of the plurality of receivers. The location server receives the TOA of the first wireless signal from the first receiver and the TOA of the second wireless signal from the second receiver. The location server calculating a TDOA of the two wireless signals and estimates a position of the at least one wireless tag based on the TDOA.
摘要翻译：无线定位系统具有由无线定位系统定位的至少一个无线标签，其中至少一个无线标签发送具有已知时间关系且具有不同带宽的两个无线信号。提供了多个接收机，其中第一接收机接收并处理两个无线信号中的第一个并且估计第一无线信号的到达时间（TOA），并且第二接收机接收并处理两个无线信号中的第二个，估计在第二收发器处的第二无线信号的TOA。多个接收机基于公共定时信号进行时间同步。位置服务器耦合到多个接收器中的每一个。位置服务器从第一接收机接收第一无线信号的TOA和来自第二接收机的第二无线信号的TOA。所述定位服务器计算所述两个无线信号的TDOA并且基于所述TDOA估计所述至少一个无线标签的位置。

6. 发明授权

US07729707B2 Method and system for synchronization offset reduction in a TDOA location system 有权
标题翻译： TDOA定位系统同步偏移减少的方法和系统
公开(公告)号：US07729707B2
公开(公告)日：2010-06-01
申请号：US11552211
申请日：2006-10-24
申请人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
发明人： Daniel Aljadeff , Reuven Amsalem , Amir Lavi
IPC分类号： H04W24/00
CPC分类号： H04B7/2681 , H04W56/0075
摘要： A method for reducing synchronization offset errors in a TDOA location finding wireless system, comprising: receiving transmissions from at least one sync unit at multiple location transceivers, wherein the multiple location transceivers are synchronized from the sync unit; determining actual times-of-arrival of the received transmissions in response to receiving transmissions; performing a wireless distance measurement between the transceivers and the at least one sync unit, the wireless distance measurement performed by the transceivers in response to the received transmissions from the at least one sync unit; computing an actual propagation time between the sync unit to the transceivers; computing differences between the actual propagation time and theoretical propagation time determined in conformity with the predetermined locations; estimating synchronization offset error of the transceivers in conformity with the computed differences; and correcting the synchronization offset error.
摘要翻译：一种用于减少TDOA定位无线系统中的同步偏移误差的方法，包括：从多个位置收发器处的至少一个同步单元接收传输，其中所述多位置收发器从所述同步单元同步; 响应于接收到的传输确定所接收的传输的实际到达时间; 在所述收发器和所述至少一个同步单元之间执行无线距离测量，响应于来自所述至少一个同步单元的接收到的传输，由所述收发器执行的所述无线距离测量; 计算同步单元到收发器之间的实际传播时间; 计算根据预定位置确定的实际传播时间和理论传播时间之间的差异; 根据计算出的差异估计收发器的同步偏移误差; 并校正同步偏移误差。

7. 发明申请

US20070046460A1 ENHANCED AREA SEPARATION IN WIRELESS LOCATION SYSTEMS AND METHOD 有权
标题翻译：无线定位系统和方法中的增强区域分离
公开(公告)号：US20070046460A1
公开(公告)日：2007-03-01
申请号：US11466540
申请日：2006-08-23
申请人： Daniel Aljadeff , Reuven Amsalem , Gabi Daniely , Jonathan Chashper
发明人： Daniel Aljadeff , Reuven Amsalem , Gabi Daniely , Jonathan Chashper
IPC分类号： H04Q7/00
CPC分类号： H04W64/00 , H04L67/18 , H04W4/02
摘要： A system and method for tracking and locating wireless tags by a wireless location system in limited and well defined areas that provides for differentiation between the well defined areas comprises transmitting identifying area information by short range transmitters, at least one short range transmitter positioned in the proximity of an entry and exit point of each well defined area. The wireless tags receive the identifying area information when in coverage range of one of the short range transmitters. The wireless tags will transmit the identifying information in the tag message. The transmission will include the last identifying information received and accepted by the wireless tag. A plurality of location receivers and/or access points are installed in or in the proximity of the well defined areas for locating the wireless tags.
摘要翻译：用于通过无线定位系统在有限和明确定义的区域中跟踪和定位无线标签的系统和方法，其提供在良好定义的区域之间的区分包括通过短距离发射机发送识别区域信息，至少一个位于邻近的短距离发射机每个井定义区域的入口点和出口点。当在短距离发射机之一的覆盖范围内时，无线标签接收识别区域信息。无线标签将在标签消息中传送识别信息。传输将包括由无线标签接收和接收的最后识别信息。多个位置接收器和/或接入点安装在定义明确的区域中或附近，用于定位无线标签。

8. 发明申请

US20090273465A1 ROOM SEPARATION IN A WLAN BASED RTLS AND METHOD THEREFOR 审中-公开
标题翻译：基于WLAN的RTLS中的房间分离及其方法
公开(公告)号：US20090273465A1
公开(公告)日：2009-11-05
申请号：US12114505
申请日：2008-05-02
申请人： Adi Shamir , Daniel Aljadeff , Reuven Amsalem
发明人： Adi Shamir , Daniel Aljadeff , Reuven Amsalem
IPC分类号： H04Q7/00
CPC分类号： G01S5/0263 , G01S1/725 , H04W84/02
摘要： A wireless location system for tracking and locating a wireless tag in a structure having defined areas that provides for differentiation between the defined areas has at least one ultrasonic transmitter positioned in each of the defined areas for transmitting an ultrasonic signal having area identification and/or transmitter ID information. A plurality of wireless tags are provided wherein each wireless tag transmits a last area identifying and/or transmitter ID information received and accepted by the wireless tag in a tag message. A plurality of location receivers is installed in the structure for receiving the tag message and for reporting the received message from the tag along with optional measured parameters to a common server. The common server determines the location of each wireless tags in the structure using the defined area or transmitter ID as reported by each wireless tag.
摘要翻译：一种无线定位系统，用于跟踪和定位具有限定区域的结构中的无线标签，所述定义区域提供限定区域之间的区分，所述无线标签具有定位在每个所定义区域中的至少一个超声波发射器，用于发射具有区域识别和/或发射机身份信息。提供了多个无线标签，其中每个无线标签在标签消息中发送由无线标签接收和接收的最后区域标识和/或发射机ID信息。在用于接收标签消息的结构中安装多个位置接收器，并且用于将标签中接收到的消息与可选的测量参数一起报告给公共服务器。公共服务器使用由每个无线标签报告的定义的区域或发射机ID来确定结构中的每个无线标签的位置。

9. 发明授权

US07295115B2 Radio-frequency identification (RFID) tag employing unique reception window and method therefor 有权
标题翻译：采用独特接收窗口的射频识别（RFID）标签及其方法
公开(公告)号：US07295115B2
公开(公告)日：2007-11-13
申请号：US11059047
申请日：2005-02-16
申请人： Daniel Aljadeff , Reuven Amsalem
发明人： Daniel Aljadeff , Reuven Amsalem
IPC分类号： G08B13/14
CPC分类号： G06K19/0717 , G01S5/06 , G01S13/765 , G01S13/878 , G06K19/0705 , G06K19/0723 , G06K19/07345
摘要： A radio-frequency identification (RFID) tag employing a unique reception window and method for operating the tag system provides low-power operation for enhanced tag battery life, while providing addressable tags that can receive commands and data from the system, which can be a wireless local area network (WLAN) incorporating location finding for locating the tags. Interference with other tags and other transmitters is prevented by either using a sniffer circuit to determine that no network transmission is in progress, or by using a special non-interfering coding sequence. A receiver within the tag is operated for a predetermined period of time after a periodic transmission is made from the tag, and an address decoder determines if the tag is being addressed. The receiver can receive data and/or commands after being addressed and is shutdown if the window time elapses, the tag is not addressed, or at the completion of data/command transfer.
摘要翻译：使用独特的接收窗口的射频识别（RFID）标签和用于操作标签系统的方法提供低功率操作以增强标签电池寿命，同时提供可接收的标签，其可以从系统接收命令和数据，其可以是无线局域网（WLAN），包含用于定位标签的位置查找。通过使用嗅探器电路来确定没有网络传输正在进行中或通过使用特殊的非干扰编码序列来防止与其他标签和其他发射机的干扰。在从标签进行周期性传输之后，标签内的接收机操作预定的时间段，并且地址解码器确定标签是否被寻址。接收器可以在寻址之后接收数据和/或命令，并且如果窗口时间过去，标签未被寻址，或者在完成数据/命令传送时被关闭。

10. 发明授权

US06963289B2 Wireless local area network (WLAN) channel radio-frequency identification (RFID) tag system and method therefor 有权
标题翻译：无线局域网（WLAN）信道射频识别（RFID）标签系统及其方法
公开(公告)号：US06963289B2
公开(公告)日：2005-11-08
申请号：US10274698
申请日：2002-10-18
申请人： Daniel Aljadeff , Yair Granot , Shalom Tsruya , Reuven Amsalem
发明人： Daniel Aljadeff , Yair Granot , Shalom Tsruya , Reuven Amsalem
IPC分类号： G01S5/06 , G01S13/76 , G01S13/87 , G08B5/22 , G01S13/08 , H04Q5/22
CPC分类号： G01S5/06 , G01S13/765 , G01S13/878
摘要： A wireless local area network (WLAN) radio-frequency identification (RFID) tag system provides location finding in a wireless local area network (WLAN), using a WLAN channel. Interference with the WLAN is prevented by either using a sniffer circuit to determine that no network transmission is in progress, using a modified coding sequence or preamble to cause standard WLAN receivers to ignore the RFID tag transmissions, or transmitting a message using a standard WLAN signal addressed to an address not corresponding to a unit within the WLAN. Location units (LUs) and a master unit (MU) within the WLAN receive the RFID tag transmissions and can determine the location of a tag by triangulation based on differences between the signals received at the location units from the tag. The master unit receives the signal information from the location units and computes the location of the tag. Time-difference-of-Arrival (TDOA), received signal strength indication (RSSI) or other triangulation techniques may be used.
摘要翻译：无线局域网（WLAN）射频识别（RFID）标签系统使用WLAN信道在无线局域网（WLAN）中提供定位。通过使用嗅探器电路来确定没有网络传输正在进行中，使用修改的编码序列或前导码来防止WLAN的干扰，以使标准WLAN接收机忽略RFID标签传输，或者使用标准WLAN信号发送消息寻址到不对应于WLAN内的单元的地址。 WLAN内的位置单元（LU）和主单元（MU）接收RFID标签传输，并且可以基于在标签的位置单元处接收的信号之间的差异通过三角测量来确定标签的位置。主单元从位置单元接收信号信息并计算标签的位置。可以使用到达时差（TDOA），接收信号强度指示（RSSI）或其他三角测量技术。

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