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71. 发明授权

US08410906B1 Battery assisted RFID system RF power control and interference mitigation methods 有权
标题翻译：电池辅助RFID系统RF功率控制和干扰减轻方法
公开(公告)号：US08410906B1
公开(公告)日：2013-04-02
申请号：US12205718
申请日：2008-09-05
申请人： Farron Dacus , Johannes Albertus van Niekerk , Alfonso Rodriguez
发明人： Farron Dacus , Johannes Albertus van Niekerk , Alfonso Rodriguez
IPC分类号： H04Q5/22
CPC分类号： G06K19/0701 , G06K7/10039 , G06K19/0715 , H04Q2213/13095
摘要： The present invention discloses battery assisted RFID system RF power leveling methods that optimize the amount of transmitted power and interference from a reader in relation to the sensitivity of the RFID tags, their ranges from the reader, and the unique physics of the backscatter RFID radio link. These methods enhance system reliability when employing battery assisted RFID tags that operate with sensitive transistor based square law tag receivers and highly sensitive RFID readers intended to take advantage of outstanding tag sensitivity. Further enhancement is achieved via design of system command sets and tag state machine behavior that optimally support the power level operations, power level operations that span across tag hibernation and normal modes, and that otherwise control system interference. Embodiments of the present invention are also enhanced with receiver training and synchronizing methods suited to the high tag sensitivity and need for dynamic range state switching. These enhancements may employ pseudo-random sequence based receiver training, activation signaling, and frame synchronizing.
摘要翻译：本发明公开了一种电池辅助RFID系统RF功率调平方法，其优化了RFID标签的灵敏度，读取器的灵敏度以及反向散射RFID无线电链路的独特物理性质的读取器的发射功率和干扰量。这些方法在采用电磁辅助RFID标签时可以提高系统的可靠性，该标签采用敏感晶体管的平方律标签接收器和高灵敏度RFID读取器，旨在利用突出的标签灵敏度。通过设计系统命令集和标签状态机行为来实现进一步的增强，其最佳地支持功率电平操作，横跨标签休眠和正常模式的功率电平操作，以及否则控制系统干扰。本发明的实施例还通过适用于高标签灵敏度的接收机训练和同步方法以及对动态范围状态切换的需要而增强。这些增强可以采用基于伪随机序列的接收机训练，激活信令和帧同步。

72. 发明授权

US08384523B1 Battery assisted RFID system command set 有权
标题翻译：电池辅助RFID系统命令集
公开(公告)号：US08384523B1
公开(公告)日：2013-02-26
申请号：US12205745
申请日：2008-09-05
申请人： Alfonso Rodriquez , Farron Dacus , Johannes Albertus van Niekerk
发明人： Alfonso Rodriquez , Farron Dacus , Johannes Albertus van Niekerk
IPC分类号： H04Q5/22
CPC分类号： G06K7/10009 , H04Q9/00 , H04Q2209/47 , H04Q2209/75 , H04Q2209/88
摘要： Specialized battery assisted command set design methods are disclosed that provide for interference rejection using highly sensitive but relatively broadband RFID tags. The command set design also supports RFID system RF power control for further interference control. The command set design also allows for convenient expansion to active transmitters and receivers in tags operating within the same system. Embodiments of the present invention provide RFID systems having battery-assisted, Semi-Passive RFID tags that operate with sensitive transistor based square law tag receivers utilizing a plurality of tag receiver dynamic range states. Embodiments of the present invention are also enhanced with receiver training and synchronizing methods suited to the high tag sensitivity and need for dynamic range state switching. These enhancements may employ pseudo-random sequence based receiver training, activation signaling, and frame synchronizing. Additional enhancement attained via power leveling methods that optimize the amount of transmitted power and interference from a reader in relation to the sensitivity of the RFID tags, their ranges from the reader, and the unique physics of the backscatter RFID radio link.
摘要翻译：公开了专门的电池辅助命令集设计方法，其提供使用高度灵敏但相对宽的RFID标签的干扰抑制。命令集设计还支持RFID系统RF功率控制，进一步进行干扰控制。命令集设计还允许在同一系统内操作的标签中方便地扩展到主动发射机和接收机。本发明的实施例提供具有电池辅助的半无源RFID标签的RFID系统，其利用多个标签接收器动态范围状态使用基于灵敏晶体管的平方律标签接收器进行操作。本发明的实施例还通过适用于高标签灵敏度的接收机训练和同步方法以及对动态范围状态切换的需要而增强。这些增强可以采用基于伪随机序列的接收机训练，激活信令和帧同步。通过功率调整方法获得的附加增强，其优化与RFID标签的灵敏度相关的发送功率和干扰量，读取器的范围以及反向散射RFID无线电链路的独特物理性能。

73. 发明申请

US20120268327A1 INVERTED F ANTENNA SYSTEM AND RFID DEVICE HAVING SAME 有权
标题翻译：反相F天线系统和具有相同功能的RFID设备
公开(公告)号：US20120268327A1
公开(公告)日：2012-10-25
申请号：US13532694
申请日：2012-06-25
申请人： Edmond Sardariani , Thomas Birnbaum , Debalina Ghosh , Sireesha Ramisetti
发明人： Edmond Sardariani , Thomas Birnbaum , Debalina Ghosh , Sireesha Ramisetti
IPC分类号： H01Q9/04
CPC分类号： G06K19/07749 , H01Q1/2208 , H01Q1/38 , H01Q9/0421 , H01Q9/145 , H01Q23/00
摘要： An RFID device according to one embodiment includes an active portion of a first inverted F antenna; a feed electrically coupled to the active portion; an active portion of a second inverted F antenna, a feed electrically coupled to the second active portion; a ground plane spaced from the active, portions; and an RFID controller coupled to the feeds. An RFID device according to another embodiment includes an inverted F antenna having an active portion, a ground plane spaced from the active portion, and a feed coupled to the active portion, wherein the active portion includes multiple aims, a first of the arms having a first length and a second of the arms having a second length; and an RFID controller coupled to the feed.
摘要翻译：根据一个实施例的RFID设备包括第一倒F天线的有效部分; 馈电电耦合到所述有源部分; 第二倒F天线的有效部分，电耦合到第二有源部分的馈电; 与活动部分间隔开的接地平面; 以及耦合到馈送的RFID控制器。根据另一实施例的RFID装置包括倒置的F天线，其具有有源部分，与有源部分间隔开的接地平面和耦合到有源部分的馈电，其中有源部分包括多个目标，第一臂具有具有第二长度的第一长度和第二臂; 以及耦合到进料的RFID控制器。

74. 发明授权

US08115688B2 RF conduit and systems implementing same 有权
标题翻译： RF管道和实现相同的系统
公开(公告)号：US08115688B2
公开(公告)日：2012-02-14
申请号：US12258304
申请日：2008-10-24
申请人： Edward M. Farrell
发明人： Edward M. Farrell
IPC分类号： H01Q1/24 , H01Q21/00
CPC分类号： H04Q9/00 , H01Q1/2225 , H01Q21/24 , H04Q2209/47
摘要： An RF conduit according to one embodiment includes a pair of antennas coupled together by a transmission line such that RF tunneling occurs along the transmission line between the antennas and an RF signal received at one antenna is reradiated at the other antenna. An RF conduit according to another embodiment includes a pair of antenna traces each having first and second end portions and a central portion extending between the first and second end portions, wherein the central portions are positioned relative to each other such that they form a transmission line for RF tunneling therealong between the first ends of the antenna traces and the second ends of the antenna traces and an RF signal received at the first ends is reradiated at the second ends. Additional systems and methods are presented.
摘要翻译：根据一个实施例的RF管道包括通过传输线耦合在一起的一对天线，使得沿着天线之间的传输线发生RF隧道，并且在另一个天线处再次辐射在一个天线处接收的RF信号。根据另一实施例的RF导管包括一对天线迹线，每个天线迹线具有第一和第二端部以及在第一和第二端部之间延伸的中心部分，其中中心部分相对于彼此定位，使得它们形成传输线用于在天线迹线的第一端和天线迹线的第二端之间的RF隧穿，并且在第二端处再次辐射在第一端接收的RF信号。介绍了其他系统和方法。

75. 发明申请

US20120003938A1 DYNAMIC SIGNAL DETECTION THRESHOLD 有权
标题翻译：动态信号检测阈值
公开(公告)号：US20120003938A1
公开(公告)日：2012-01-05
申请号：US13165754
申请日：2011-06-21
申请人： Dean Kawaguchi , Manu H. R. Rao
发明人： Dean Kawaguchi , Manu H. R. Rao
IPC分类号： H04B7/005
CPC分类号： G06K7/0008 , G06K19/0723 , H04Q2213/13095
摘要： A method for setting a signal detection threshold according to one embodiment includes determining a measure of a noise floor in a signal derived from a radio frequency signal received by an antenna using a same circuit used to detect a subcarrier signal during transmitting and prior to sending a command to a transponder to respond; and setting a signal detection threshold above the noise floor. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
摘要翻译：根据一个实施例的用于设置信号检测阈值的方法包括：使用在发送期间和在发送之前使用用于检测子载波信号的相同电路从由天线接收的射频信号导出的信号中的本底噪声的测量值指挥应答者回应; 并将信号检测阈值设置在噪声本底以上。这种方法也可以被实现为使用用于执行各种操作的逻辑的系统。还介绍了其他系统和方法。

76. 发明申请

US20120002772A1 DATA CLOCK RECOVERY LOOP JAM SET USING SUBCARRIER FREQUENCY ESTIMATE 有权
标题翻译：使用SUBCARRIER频率估计的数据时钟恢复循环JAM
公开(公告)号：US20120002772A1
公开(公告)日：2012-01-05
申请号：US13165720
申请日：2011-06-21
申请人： Dean Kawaguchi
发明人： Dean Kawaguchi
IPC分类号： H04L7/04
CPC分类号： G06K7/0008 , G06K19/0723 , H04Q2213/13095
摘要： A method for jam setting an initial frequency of a data clock recovery loop according to one embodiment includes generating a frequency error signal in a frequency error detector from sideband signals within a backscattered radio frequency signal, wherein the frequency error accumulates in a frequency error filter coupled to an output of the frequency error detector; at about an end of an acquisition period, freezing the accumulated frequency error in the frequency error filter; and using the frozen accumulated frequency error to jam set an initial frequency of a data clock recovery loop. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
摘要翻译：根据一个实施例的用于阻塞设置数据时钟恢复环路的初始频率的方法包括在反向散射射频信号中的边带信号中产生频率误差检测器中的频率误差信号，其中频率误差累积在耦合的频率误差滤波器到频率误差检测器的输出; 在收集周期结束时，冻结频率误差滤波器中的累积频率误差; 并使用冻结的累积频率误差来设定数据时钟恢复循环的初始频率。这种方法也可以被实现为使用用于执行各种操作的逻辑的系统。还介绍了其他系统和方法。

77. 发明申请

US20120002765A1 AUTOMATIC GAIN CONTROL AND BASEBAND PREINTEGRATION TO REDUCE COMPUTATION REQUIREMENTS AT LOWER DATA RATES 有权
标题翻译：自动增益控制和基带预测以较低的数据速率降低计算要求
公开(公告)号：US20120002765A1
公开(公告)日：2012-01-05
申请号：US13165740
申请日：2011-06-21
申请人： Dean Kawaguchi
发明人： Dean Kawaguchi
IPC分类号： H04L27/08 , H04L27/00
CPC分类号： G06K7/0008 , G06K19/0723 , H04Q2213/13095
摘要： A method for processing baseband signals according to one embodiment includes receiving I and Q baseband signals; and selectively reducing an amount of samples of the baseband signals to be processed in a correlator, wherein the reduction rate is based on a data rate of the baseband signals. A preintegrator module according to one embodiment includes an automatic gain control section for performing automatic gain control on I and Q baseband signals; a first preintegrator coupled to an output of the automatic gain control section, the first preintegrator being for selectively reducing an amount of samples in the I baseband signal based on a data rate of the I baseband signal; and a second preintegrator coupled to an output of the automatic gain control section, the second preintegrator being for selectively reducing an amount of samples in the Q baseband signal based on a data rate of the Q baseband signal. Additional systems and methods are also presented.
摘要翻译：根据一个实施例的用于处理基带信号的方法包括：接收I和Q基带信号; 并且在相关器中选择性地减少要处理的基带信号的采样量，其中所述减小率基于所述基带信号的数据速率。根据一个实施例的预积分器模块包括用于对I和Q基带信号执行自动增益控制的自动增益控制部分; 第一预分解器，耦合到自动增益控制部分的输出，第一预分解器用于基于I基带信号的数据速率选择性地减少I基带信号中的采样量; 以及耦合到所述自动增益控制部分的输出的第二预先整合器，所述第二预先整合器用于基于所述Q基带信号的数据速率来选择性地减少所述Q基带信号中的样本量。还介绍了其他系统和方法。

78. 发明申请

US20120002760A1 VARIABLE LENGTH CORRELATOR 有权
标题翻译：可变长度相关器
公开(公告)号：US20120002760A1
公开(公告)日：2012-01-05
申请号：US13165726
申请日：2011-06-21
申请人： Dean Kawaguchi
发明人： Dean Kawaguchi
IPC分类号： H04L27/06
CPC分类号： G06K7/0008 , G06K19/0723 , H04Q2213/13095
摘要： A method for processing a signal derived from a radio frequency signal at some rate in a range of allowable data rates according to one embodiment includes downconverting an incoming signal derived from a radio frequency signal to complex near-baseband signals; processing the complex near-baseband signals in two data correlators corresponding to data 0 and data 1; and changing effective lengths of the correlators based on a symbol data rate of the incoming signal. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
摘要翻译：根据一个实施例的在允许数据速率的范围内以某种速率处理从射频信号得到的信号的方法包括将从射频信号导出的输入信号下变频到复数的近基带信号; 在对应于数据0和数据1的两个数据相关器中处理复合近基带信号; 以及基于所述输入信号的符号数据速率来改变所述相关器的有效长度。这种方法也可以被实现为使用用于执行各种操作的逻辑的系统。还介绍了其他系统和方法。

79. 发明申请

US20120002758A1 SUBCARRIER FREQUENCY ACQUISITION AND COMPLEX DEROTATION TO BASEBAND 有权
标题翻译： SUBCARRIER频率采集和复合分析到基带
公开(公告)号：US20120002758A1
公开(公告)日：2012-01-05
申请号：US13165708
申请日：2011-06-21
申请人： Dean Kawaguchi
发明人： Dean Kawaguchi
IPC分类号： H04L25/10
CPC分类号： G06K7/0008 , G06K19/0723 , H04Q2213/13095
摘要： A method for demodulating a radio frequency signal according to one embodiment includes receiving digital signals derived from a radio frequency signal; converting the digital signals to baseband signals; generating a frequency error signal using the baseband signals during an acquisition period; and shifting a frequency of the digital signals towards zero frequency error during the acquisition period using the frequency error signal, with the proviso that the digital signals are not phase locked during the shifting. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
摘要翻译：根据一个实施例的用于解调射频信号的方法包括接收从射频信号导出的数字信号; 将数字信号转换为基带信号; 在采集周期期间使用基带信号产生频率误差信号; 并且在采集周期期间使用频率误差信号将数字信号的频率转向零频率误差，条件是在移位期间数字信号不是相位锁定的。这种方法也可以被实现为使用用于执行各种操作的逻辑的系统。还介绍了其他系统和方法。

80. 发明授权

US08077012B2 RFID device with first clock for data acquisition and/or calibration of second clock 有权
标题翻译：具有用于第二时钟的数据采集和/或校准的第一时钟的RFID设备
公开(公告)号：US08077012B2
公开(公告)日：2011-12-13
申请号：US11424810
申请日：2006-06-16
申请人： Naresh Batra , Robert Olah , William Henry Bares
发明人： Naresh Batra , Robert Olah , William Henry Bares
IPC分类号： H04Q5/22
CPC分类号： G06K19/0723 , G06F1/14
摘要： A system according to one embodiment of the present invention includes a first clock signal generator generating a first clock signal at a first frequency, and a second clock signal generator generating a second clock signal at a second frequency that is higher than the first frequency. The first clock signal is used to calibrate the second clock signal generator. An RFID device according to another embodiment of the present invention includes a crystal controlled first clock signal generator generating a first clock signal at a first frequency, a second clock signal generator generating a second clock signal at a second frequency that is higher than the first frequency, and an activate circuit. The second clock signal generator is inactive until activated by the activate circuit. The first clock signal is used to calibrate the second clock signal generator. Methods are also presented.
摘要翻译：根据本发明的一个实施例的系统包括产生第一频率的第一时钟信号的第一时钟信号发生器和产生高于第一频率的第二频率的第二时钟信号的第二时钟信号发生器。第一个时钟信号用于校准第二个时钟信号发生器。根据本发明另一实施例的RFID设备包括：晶体控制的第一时钟信号发生器，其以第一频率产生第一时钟信号;第二时钟信号发生器，其以比第一频率高的第二频率产生第二时钟信号，以及激活电路。第二个时钟信号发生器无效，直到被激活电路激活。第一个时钟信号用于校准第二个时钟信号发生器。还提出了方法。

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