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公开(公告)号：US10585159B2
公开(公告)日：2020-03-10
申请号：US15893474
申请日：2018-02-09
申请人： Mojix, Inc.
摘要： Systems and methods for locating one or more radio frequency identification (RFID) tags are provided. A phase difference of received information signals of illuminated RFID tags is utilized to locate the RFID tags. One or more exciters transmit interrogation signals to illuminate the RFID tags in which the exciters may have a plurality of antenna selectively configured to transmit through two or more antennas and to receive on one antenna. Multiple reads of the same RFID tag can also be performed to generate a probability model of the location of the RFID tag. An enhanced particle filter is applied to probability model to determine the exact location of the RFID.
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公开(公告)号：US20190242968A1
公开(公告)日：2019-08-08
申请号：US16210755
申请日：2018-12-05
申请人： Mojix, Inc.
发明人： Ramin Sadr
CPC分类号： G01S5/0263 , G01S5/0036 , G01S5/021 , G01S13/74 , G01S13/867 , G01S13/878 , G01S19/42 , G01S2013/468 , G06Q10/047 , G06Q50/28
摘要： Several embodiments of the invention provide for a system and processes for joint entity and object tracking using RFID and a detection network. The use of RFID and a detection network allows for the efficient detection, tracking, and recording of an entity path. Various embodiments of the invention allow the system to track the paths of entities through a space and to monitor the entities' interactions with objects in the space. In addition to tracking entities' paths, the system of some embodiments associates each entity with various objects that each entity interacts with, and uses targeted reads of the associated objects to distinguish and verify the paths associated with each entity. The paths and interactions of the entities with objects in the space are then recorded and analyzed to provide insight about the different entities and about their interactions within the space.
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公开(公告)号：US20190102582A1
公开(公告)日：2019-04-04
申请号：US15965755
申请日：2018-04-27
申请人： Mojix, Inc.
发明人： Ramin Sadr
摘要： A multi-protocol, multi-band array antenna system may be used in Radio Frequency Identification (RFID) system reader and sensory networks. The antenna array may include array elements with an integrated low noise amplifier. The system may employ digital beam forming techniques for transmission and steering of a beam to a specific sensor tag or group of tags in a cell. The receive beam forming network is optimized for detecting signals from each sensor tag. Narrow and wideband interferences may be excised by an interference nulling algorithm. Space division multiplexing may be used by the antenna system to enhance system processing capacity.
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4.发明授权公开(公告)号：US10127412B2
公开(公告)日：2018-11-13
申请号：US15479233
申请日：2017-04-04
申请人： Mojix, Inc.
发明人： Ramin Sadr
摘要： Systems and methods for location estimation and tracking for passive RFID and wireless sensor networks in accordance with embodiments of the invention are disclosed. In one embodiment, a process for obtaining location information using an RFID reader system includes transmitting a combined interrogation and ranging signal from a plurality of antennas, where the ranging signal is a pseudorandom signal, receiving a backscattered return signal from an RFID tag at one or more receive antennas, extracting an information signal from the return signal and decoding the information signal to obtain RFID tag data, extracting a received ranging signal from the return signal, and estimating a range to the RFID tag based upon correlation between the ranging signal and the received ranging signal.
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公开(公告)号：US20180268176A1
公开(公告)日：2018-09-20
申请号：US15808792
申请日：2017-11-09
申请人： Mojix, Inc.
发明人： Ramin Sadr
CPC分类号： G06K7/10019 , G06K7/10366 , H03M13/098 , H03M13/2957 , H03M13/3905 , H03M13/6331 , H04B1/16 , H04L1/0045 , H04L27/0014
摘要： Systems and methods for decoding data transmitted by RFID tags are disclosed. One embodiment of the invention includes an analyzer and equalizer configured to filter an input signal, an estimation block configured to obtain a baseband representation of the modulated data signal by mixing the filtered input signal with the carrier wave, and a coherent detector configured to perform phase and timing recovery on the modulated data signal in the presence of noise and to determine a sequence of data symbols.
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公开(公告)号：US10009196B2
公开(公告)日：2018-06-26
申请号：US15460070
申请日：2017-03-15
申请人： Mojix, Inc.
发明人： Dariush Divsalar , Ramin Sadr
CPC分类号： H04L25/03171
摘要： Multiple symbol noncoherent soft output detectors in accordance with embodiments of the invention are disclosed. In a number of embodiments, the multiple symbol noncoherent soft output detector uses soft metrics based on the Log Likelihood Ratio (LLR) of each symbol to provide information concerning the reliability of each detected symbol. One embodiment of the invention includes a receiver configured to receive and sample a phase modulated input signal, and a multiple symbol noncoherent soft output detector configured to receive the sampled input signal and to generate a soft metric indicative of the reliability of a detected symbol based upon observations over multiple symbols.
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公开(公告)号：US09983299B2
公开(公告)日：2018-05-29
申请号：US14796727
申请日：2015-07-10
申请人： Mojix, Inc.
CPC分类号： G01S11/02 , G01S13/00 , G01S13/75 , G01S2013/0245 , G06K7/10099 , G06K7/10356 , G06K7/10366
摘要： RFID systems for locating RFID tags utilizing phased array antennas and compressed sensing processing techniques in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, an RFID system includes at least one exciter that includes at least one transmit antenna, a phased antenna array that includes a plurality of receive antennas, and an RFID receiver system configured to communicate with the at least one exciter and connected to the phased antenna array, where the RFID receiver system is configured to locate an RFID tag by performing reads of the RFD tag at multiple frequencies, generating a measurement matrix, and determining a line of sight (LOS) distance between the activated RFID tag and each of the plurality of receive antennas by eliminating bases from the measurement matrix.
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8.发明申请公开(公告)号：US20170286730A1
公开(公告)日：2017-10-05
申请号：US15479233
申请日：2017-04-04
申请人： Mojix, Inc.
发明人： Ramin Sadr
CPC分类号： G06K7/10099 , G01S1/02 , G01S5/14 , G01S5/145 , G01S5/30 , G06K7/10128 , H04Q2209/75
摘要： Systems and methods for location estimation and tracking for passive RFID and wireless sensor networks in accordance with embodiments of the invention are disclosed. In one embodiment, a process for obtaining location information using an RFID reader system includes transmitting a combined interrogation and ranging signal from a plurality of antennas, where the ranging signal is a pseudorandom signal, receiving a backscattered return signal from an RFID tag at one or more receive antennas, extracting an information signal from the return signal and decoding the information signal to obtain RFID tag data, extracting a received ranging signal from the return signal, and estimating a range to the RFID tag based upon correlation between the ranging signal and the received ranging signal.
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公开(公告)号：US09647797B2
公开(公告)日：2017-05-09
申请号：US15060393
申请日：2016-03-03
申请人： Mojix, Inc.
发明人： Ramin Sadr , Dariush Divsalar
CPC分类号： H04L1/0054 , H04L25/03171 , H04L25/067 , H04L27/0012 , H04L27/233
摘要： Systems and methods for detecting collisions in radio frequency tags in accordance with embodiments of the invention are disclosed. In one embodiment, a receiver system includes a receiver configured to receive and sample a phase modulated input signal, and a multiple symbol noncoherent soft output detector configured to receive the sampled input signal and to generate a soft metric indicative of the reliability of a detected symbol based upon observations over multiple symbols, a collision detector configured to calculate a decision metric from a set of soft metrics generated by the multiple symbol noncoherent soft output detector and detect a collision when the decision metric satisfies a predetermined criterion.
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公开(公告)号：US20150316643A1
公开(公告)日：2015-11-05
申请号：US14796727
申请日：2015-07-10
申请人： Mojix, Inc.
CPC分类号： G01S11/02 , G01S13/00 , G01S13/75 , G01S2013/0245 , G06K7/10099 , G06K7/10356 , G06K7/10366
摘要： RFID systems for locating RFID tags utilizing phased array antennas and compressed sensing processing techniques in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, an RFID system includes at least one exciter that includes at least one transmit antenna, a phased antenna array that includes a plurality of receive antennas, and an RFID receiver system configured to communicate with the at least one exciter and connected to the phased antenna array, where the RFID receiver system is configured to locate an RFID tag by performing reads of the RFD tag at multiple frequencies, generating a measurement matrix, and determining a line of sight (LOS) distance between the activated RFID tag and each of the plurality of receive antennas by eliminating bases from the measurement matrix.
摘要翻译： 公开了用于定位利用相控阵天线的RFID标签的RFID系统和根据本发明的实施例的压缩感测处理技术。 在本发明的一个实施例中，RFID系统包括至少一个激励器，其包括至少一个发射天线，包括多个接收天线的相控天线阵列，以及配置成与所述至少一个激励器通信的RFID接收器系统，以及 连接到相控天线阵列，其中RFID接收器系统被配置为通过以多个频率执行RFD标签的读取来定位RFID标签，生成测量矩阵，以及确定激活的RFID标签之间的视线（LOS）距离 以及通过从所述测量矩阵中消除基座来确定所述多个接收天线中的每一个。
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