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公开(公告)号：US09262912B2
公开(公告)日：2016-02-16
申请号：US12072423
申请日：2008-02-25
CPC分类号： G08C21/00 , G01S5/02 , G01S5/0252 , G01S11/02 , G01S13/756 , G01S13/876
摘要： Methods and systems for localizing an asset using the modulated backscatter from an asset tag and one or more marker tags are described. The system includes the reader, a location module and one or more marker tags. The location estimates for the asset tag are based partially on a prior knowledge of the location of each of the one or more marker tags. The location for each marker tag may be stored in a database. The location module determines a location estimate for the asset tag using the estimated parameters of the modulated backscatter signals received from one or more marker tags and from the asset tag. Using the known locations of the marker tags, a location estimate of the asset tag can be determined. The location estimate may be a relative location, an absolute location, and/or may be a zone including the marker tags. A mobile reader using the marker tags can localize asset tags throughout a large area and may, for example, take an inventory of assets throughout the large area.
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公开(公告)号：US20100156610A1
公开(公告)日：2010-06-24
申请号：US12548993
申请日：2009-08-27
申请人： Ben J. Wild , Upamanyu Madhow , Kannan Ramchandran
发明人： Ben J. Wild , Upamanyu Madhow , Kannan Ramchandran
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008
摘要： A backscatter tag system including a tag having tag circuitry and a reader for transmitting a command signal to the tag includes an energizer node for transmitting an energy signal to the tag to energize the tag and provide energy for operating the tag circuitry and for emitting a backscatter signal by the tag. The energizer node includes an energizer receiver for receiving the command signal from the reader to provide a received command signal and an energizer transmitter for transmitting the received command signal from the reader to the tag. The energizer node transmits both the energy signal and the received command signal to the tag. The energizer transmitter can transmit a sinusoidal signal, a frequency hopping signal, a spread spectrum signal, or a frequency shifted signal to the tag. The backscatter tag circuitry can include a processor.
摘要翻译： 包括具有标签电路的标签和用于向标签发送命令信号的读取器的反向散射标签系统包括用于将能量信号发送到标签的激励器节点，以激励标签并提供用于操作标签电路的能量并且用于发射反向散射 信号由标签。 激励器节点包括用于从读取器接收命令信号以提供接收到的命令信号的激发器接收器和用于将接收到的命令信号从读取器发送到标签的激励器发射器。 激励器节点将能量信号和接收到的命令信号都发送到标签。 激发器发射器可以向标签传输正弦信号，跳频信号，扩频信号或频移信号。 反向散射标签电路可以包括处理器。
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3.发明申请公开(公告)号：US20100060424A1
公开(公告)日：2010-03-11
申请号：US12406629
申请日：2009-03-18
CPC分类号： H04B1/707 , G01S13/751 , G06K7/0008 , G06K7/10297 , G06K19/0723 , G06K19/0724 , H04B2201/70715
摘要： One or more readers transmit radio frequency (RF) beacons to be electronically reflected by tags. Data transmitted via modulated backscatter from radio frequency identification (RFID) tags is encoded so as to permit reliable demodulation of simultaneous transmissions from multiple tags. This includes the use of spreading sequences as in direct sequence spread spectrum, where the spreading sequences may be a function of the tag ID, or may be randomly chosen. Backscattered signals from multiple tags may be detected using well-known receiver techniques for code division multiple access (CDMA) systems. Readers may be equipped with transmit and/or receive antenna arrays. A receive antenna array permits a reader to estimate directions of arrival for received signals, as well as to enhance range by performing receive beamforming.
摘要翻译： 一个或多个读取器传送射频（RF）信标以由标签电子反射。 通过来自射频识别（RFID）标签的调制反向散射发送的数据被编码，以允许来自多个标签的同时传输的可靠解调。 这包括在直接序列扩频中使用扩展序列，其中扩展序列可以是标签ID的函数，或者可以是随机选择的。 可以使用用于码分多址（CDMA）系统的公知接收机技术来检测来自多个标签的后向散射信号。 读取器可以配备发送和/或接收天线阵列。 接收天线阵列允许读取器估计接收信号的到达方向，以及通过执行接收波束形成来增强距离。
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公开(公告)号：US10451712B1
公开(公告)日：2019-10-22
申请号：US16298791
申请日：2019-03-11
摘要： Systems and methods for labeling radar tracks for machine learning are disclosed. According to some aspects, a machine accesses data from radar unit(s), the data from the radar unit(s) comprising radar tracks, each radar track comprising one or more of the following: Doppler and micro-Doppler measurement(s), range measurement(s), and angle measurement(s). The machine accesses data from computer vision device(s), the data from the computer vision device(s) comprising image(s), the data from the computer vision device(s) being associated with a common geographic region and a common time period with the data from the radar unit(s). The machine labels, using an image recognition module, objects in the image(s). The machine determines, based on the common geographic region and the common time period, that labeled object(s) in the image(s) map to radar track(s). The machine labels the radar track(s) based on labels of the labeled objects.
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5.发明授权公开(公告)号：US08988197B2
公开(公告)日：2015-03-24
申请号：US12548993
申请日：2009-08-27
申请人： Ben J. Wild , Upamanyu Madhow , Kannan Ramchandran
发明人： Ben J. Wild , Upamanyu Madhow , Kannan Ramchandran
IPC分类号： G08B13/14 , G08B13/181 , G06K13/06 , H04B3/36 , G06K7/00
CPC分类号： G06K7/0008
摘要： A backscatter tag system including a tag having tag circuitry and a reader for transmitting a command signal to the tag includes an energizer node for transmitting an energy signal to the tag to energize the tag and provide energy for operating the tag circuitry and for emitting a backscatter signal by the tag. The energizer node includes an energizer receiver for receiving the command signal from the reader to provide a received command signal and an energizer transmitter for transmitting the received command signal from the reader to the tag. The energizer node transmits both the energy signal and the received command signal to the tag. The energizer transmitter can transmit a sinusoidal signal, a frequency hopping signal, a spread spectrum signal, or a frequency shifted signal to the tag. The backscatter tag circuitry can include a processor.
摘要翻译： 包括具有标签电路的标签和用于向标签发送命令信号的读取器的反向散射标签系统包括用于将能量信号发送到标签的激励器节点，以激励标签并提供用于操作标签电路的能量并且用于发射反向散射 信号由标签。 激励器节点包括用于从读取器接收命令信号以提供接收到的命令信号的激发器接收器和用于将接收到的命令信号从读取器发送到标签的激励器发射器。 激励器节点将能量信号和接收到的命令信号都发送到标签。 激发器发射器可以向标签传输正弦信号，跳频信号，扩频信号或频移信号。 反向散射标签电路可以包括处理器。
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6.发明授权公开(公告)号：US07136353B2
公开(公告)日：2006-11-14
申请号：US10150858
申请日：2002-05-17
CPC分类号： H04L47/10 , H04L12/5692 , H04L47/20 , H04L47/2408
摘要： Improved quality of service management for multiple connections between a sender and a receiver may be achieved by allocating a host-level transmission rate among the multiple connections based on a ratio of a weight associated with each connection and a sum of the weights associated the connections. Data packets associated with the connections may then be selectively transmitted to the receiver such that data packets having a highest difference between the allocated transmission rate and an actual transmission rate are transmitted first. The data packets transmitted to the sender may also be clocked using a transmission timer having period corresponding to the host-level transmission rate.
摘要翻译： 可以通过基于与每个连接相关联的权重的比率和与该连接相关联的权重的总和来分配多个连接中的主机级传输速率来实现提高发送者和接收者之间的多个连接的服务质量管理。 然后可以将与连接相关联的数据分组选择性地发送到接收机，使得首先发送所分配的传输速率和实际传输速率之间具有最高差异的数据分组。 发送到发送方的数据分组也可以使用具有对应于主机级传输速率的周期的传输定时器来计时。
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7.发明授权公开(公告)号：US06175588B1
公开(公告)日：2001-01-16
申请号：US09001248
申请日：1997-12-30
申请人： Yevgeny Visotsky , Colin D. Frank , Upamanyu Madhow , Rahul Singh
发明人： Yevgeny Visotsky , Colin D. Frank , Upamanyu Madhow , Rahul Singh
IPC分类号： H04B1500
CPC分类号： H04L25/03038 , H04B1/707 , H04L2025/03375 , H04L2025/03477
摘要： A communication device such as a mobile station (410) for a spread spectrum communication system includes a receiver (100) having an adaptive equalizer (104) which suppresses interference on a received spread spectrum signal to produce an equalized signal (126). A pilot channel demodulator (110) demodulates the equalized signal to produce an estimate of the pilot channel (140). A summer (112) compares the pilot channel estimate and a predetermined data pattern to produce an error signal (124). A traffic channel demodulator (108) demodulates the equalized signal to produce one or more traffic channels.
摘要翻译： 诸如用于扩展频谱通信系统的移动站（410）的通信设备包括具有自适应均衡器（104）的接收机（100），其抑制对接收的扩频信号的干扰以产生均衡的信号（126）。 导频信道解调器（110）解调均衡信号以产生导频信道（140）的估计。 加法器（112）比较导频信道估计和预定数据模式以产生误差信号（124）。 业务信道解调器（108）解调均衡信号以产生一个或多个业务信道。
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8.发明授权Communication device and method for interference suppression in a DS-CDMA system 失效用于DS-CDMA系统中的干扰抑制的通信设备和方法公开(公告)号：US06175587B1
公开(公告)日：2001-01-16
申请号：US09000985
申请日：1997-12-30
IPC分类号： H04L2730
CPC分类号： H04B1/7107 , H04B1/707 , H04B1/71072 , H04B1/7115
摘要： Method and apparatus for completely suppressing interference vectors in a DS-CDMA communication system (100). Receiver circuits (122, 124, 126, 128) are assigned (404, 406) to multipath from sectors both in soft handoff and not in soft handoff with the receiver. For each receiver circuit, a set of traffic channels present on the sector's signal is determined (410). For each receiver circuit, the interference is ranked (412) according to predetermined interference criteria. A set of interference vectors is selected (414) from the ranked lists of interference and an orthogonal projection is computed (416) of the receiver's desired code or Walsh code relative to the selected set of interference vectors. The receiver circuit then uses the orthogonal projection in its correlator to despread (418) received data.
摘要翻译： 一种用于完全抑制DS-CDMA通信系统（100）中的干扰矢量的方法和装置。 分配接收机电路（122,124,126,128）以从软切换而不是与接收机的软切换中的扇区多径。 对于每个接收器电路，确定扇区信号上存在的一组业务信道（410）。 对于每个接收机电路，根据预定的干扰标准对干扰进行排序（412）。 从排列的干扰列表中选择一组干扰矢量（414），并且相对于所选择的干扰矢量组来计算（416）接收机期望码或沃尔什码的正交投影。 接收机电路然后在其相关器中使用正交投影来解扩（418）接收的数据。
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公开(公告)号：US5343496A
公开(公告)日：1994-08-30
申请号：US127384
申请日：1993-09-24
申请人： Michael L. Honig , Upamanyu Madhow
发明人： Michael L. Honig , Upamanyu Madhow
IPC分类号： H03H21/00 , H03H17/00 , H04B1/12 , H04B1/7103 , H04B3/06 , H04B7/005 , H04L27/30 , H04B1/10 , H04L1/00
CPC分类号： H04B1/7103 , H04B1/123
摘要： Circuitry and concomitant methodology for demodulating Direct-Sequence, Spread-Spectrum Code-Division Multiple-Access (DS/SS CDMA) channel signal using multiple samples per transmitted symbol and a minimum mean squared error criterion to suppress interference. In one embodiment, a bank of cyclically shifted filters determined with reference to the conventional matched filter for CDMA is used to demodulate the channel signal. In another embodiment, a bank of sub-filters determined with reference to the conventional matched filter for CDMA is employed to demodulate the channel signal. In yet another embodiment, the output of a conventional matched filter is oversampled to demodulate the channel signal. Each embodiment utilizes a set of adaptive coefficients selected to minimize the mean square error between the transmitted symbol and detected symbol.
摘要翻译： 用于解调直接序列，扩频码分多址（DS / SS CDMA）信道信号的电路和伴随方法，每个发送符号使用多个样本，以及最小均方误差准则来抑制干扰。 在一个实施例中，使用参考用于CDMA的常规匹配滤波器确定的一组循环移位滤波器来解调信道信号。 在另一实施例中，采用参考用于CDMA的常规匹配滤波器确定的一组子滤波器来解调信道信号。 在另一个实施例中，常规匹配滤波器的输出被过采样以解调信道信号。 每个实施例使用一组选择的自适应系数来最小化发射符号和检测到的符号之间的均方误差。
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10.发明授权Localization using virtual antenna arrays in modulated backscatter RFID systems 失效在调制反向散射RFID系统中使用虚拟天线阵列的本地化公开(公告)号：US08446253B2
公开(公告)日：2013-05-21
申请号：US12719126
申请日：2010-03-08
IPC分类号： G08B5/22
CPC分类号： G01S3/74 , G01S13/756
摘要： A localization method for use in a tag communication system includes associating a supertag having a plurality of tags with an item, reading backscatter signals from the tags of the plurality of tags to provide a plurality of backscatter signals, estimating a signal parameter of the backscatter signals of the plurality of backscatter signals to provide a plurality of derived signal parameters, and localizing the item in accordance with the plurality of derived signal parameters. The backscatter signals are read by a tag reader having a single antenna and the item is localized in accordance with an antenna array technique performed upon the plurality of derived signal parameters. The backscatter signals are read with an antenna array to provide a further plurality of derived signal parameters for each tag of the plurality of tags, and the item is localized in accordance with the further pluralities of derived signal parameters.
摘要翻译： 一种用于标签通信系统的定位方法包括将具有多个标签的超标与物品相关联，从多个标签的标签中读取反向散射信号以提供多个后向散射信号，估计反向散射信号的信号参数 以提供多个导出的信号参数，以及根据多个导出的信号参数来定位该项目。 后向散射信号由具有单个天线的标签读取器读取，并且该项目根据对多个导出的信号参数执行的天线阵列技术进行定位。 用天线阵列读取反向散射信号，以便为多个标签中的每个标签提供另外多个导出的信号参数，并且根据进一步的多个导出信号参数来定位该物品。
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