专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08948279B2 Interrogator and interrogation system employing the same 有权
标题翻译：采用相同的询问器和询问系统
公开(公告)号：US08948279B2
公开(公告)日：2015-02-03
申请号：US11071652
申请日：2005-03-03
申请人： John P. Volpi , Logan Scott , Eric McMurry
发明人： John P. Volpi , Logan Scott , Eric McMurry
IPC分类号： H04B1/64 , G06K7/00 , G06K17/00
CPC分类号： G06K7/10366 , G06K7/0008 , G06K2017/0051 , G06K2017/009
摘要： A control and processing system for use with an interrogator and an interrogation system employing the same. In one embodiment, the control and processing system includes a correlation subsystem having a correlator that correlates a reference code with a reply code from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.
摘要翻译：一种与询问器一起使用的控制和处理系统以及采用该询问系统的询问系统。在一个实施例中，控制和处理系统包括具有相关器的相关子系统，该相关器将参考码与来自射频识别（RFID）标签的回复码相关联并从其提供相关信号。控制和处理系统还包括判定子系统，其根据相关信号来验证RFID标签的存在。

2. 发明申请

US20120256730A1 Interrogator and System Employing the Same 有权
标题翻译：读写器和使用该系统的系统
公开(公告)号：US20120256730A1
公开(公告)日：2012-10-11
申请号：US13443594
申请日：2012-04-10
申请人： Hugh Logan Scott , Steven D. Roemerman , John P. Volpi
发明人： Hugh Logan Scott , Steven D. Roemerman , John P. Volpi
IPC分类号： G06K7/01
CPC分类号： G01S13/751 , G01S5/0221 , G01S5/12 , G01S13/9035 , G01S2013/9064
摘要： An interrogator and system employing the same. In one embodiment, the interrogator includes a receiver configured to receive a return signal from a tag and a sensing module configured to provide a time associated with the return signal. The interrogator also includes a processor configured to employ synthetic aperture radar processing on the return signal in accordance with the time to locate a position of the tag.
摘要翻译：一个询问器和采用它的系统。在一个实施例中，询问器包括被配置为从标签接收返回信号的接收器和被配置为提供与返回信号相关联的时间的感测模块。询问器还包括处理器，其被配置为根据定位标签位置的时间对返回信号采用合成孔径雷达处理。

3. 发明授权

US07893840B2 Interrogator and interrogation system employing the same 有权
公开(公告)号：US07893840B2
公开(公告)日：2011-02-22
申请号：US11838082
申请日：2007-08-13
申请人： John P. Volpi , Logan Scott , David W. Hensley
发明人： John P. Volpi , Logan Scott , David W. Hensley
IPC分类号： G08B13/14
CPC分类号： G01S13/66 , A61B90/98 , A61B2090/0805 , G01S13/825 , G01S13/878 , G06K7/0008 , G06K17/00 , G06K2017/0045 , G06Q10/08 , G06Q10/087 , H04Q9/00 , H04Q2209/47
摘要： An interrogator, methods of discerning the presence of an object, and interrogation systems employing the same. In one embodiment, the interrogation systems include multiple interrogators that communicate with a base command unit to track a location of an object. In another embodiment wherein the object is an RFID object (e.g., an object with an RFID tag), the interrogators employ signal processing techniques such as precharging the RFID object, and correlating a reference code with a reply code from the RFID object using selected techniques to increase a sensitivity of the interrogator, especially for adverse environments. In other embodiments, the interrogation systems include variations of metal instruments and sponges employed therewith. In yet another embodiment, the interrogation system includes metal interrogators capable of discerning the presence of a metal object, especially in a presence of another metal object.

4. 发明授权

US06356607B1 Preamble code structure and detection method and apparatus 失效
标题翻译：前导码结构及检测方法及装置
公开(公告)号：US06356607B1
公开(公告)日：2002-03-12
申请号：US08749885
申请日：1996-11-15
申请人： Logan Scott , Robert Monroe
发明人： Logan Scott , Robert Monroe
IPC分类号： H04L700
CPC分类号： H04B7/2681 , H04B1/7093 , H04J13/0022 , H04J13/107 , H04J2013/0037 , H04W28/06 , H04W56/0045 , H04W74/0891 , H04W88/02 , H04W88/08
摘要： In a first embodiment of the invention, a concatenated preamble code is formed by a kronecker product between two subcodes of the same or different lengths. The subcodes have favorable correlation properties and may be Barker codes, minimum peak sidelobe codes, Gold codes, Kasami codes, Bozta codes, or other codes. At the receiver a two-stage processor is used to detect the concatenated preamble code. The two-stage processor comprises a series of two filters, one of which is preferably a mismatched filter. In another aspect of the invention, a repeated codeword preamble is formed from a series of the same repeated short subcode. The short subcode may be an augmented or truncated odd-length code. At the receiver a single matched filter is preferably used to generate a series of spikes separated by the period of the subcode. An alert/confirm detector non-coherently adds together individual correlation spikes and reject false alarms. The alert function measures total correlation energy and adjusts detection thresholds based thereon, while the confirm function ensures that the proper number of correlation spikes exceed a detection threshold at the correct times. The preamble codes and their means for detection are preferably employed in a TDMA spread spectrum communication system, wherein a plurality of user stations communicate with a base station, one in each time slot (or virtual time slot).
摘要翻译：在本发明的第一实施例中，连续的前导码由相同或不同长度的两个子码之间的克罗内斯乘积形成。子代码具有良好的相关性质，可以是巴克码，最小峰值旁瓣码，金码，卡萨米码，波兹塔码，或其他代码。在接收机处，使用两级处理器来检测级联的前导码。两级处理器包括一系列两个过滤器，其中一个过滤器最好是错配过滤器。在本发明的另一方面，重复的码字前导由一系列相同的重复的短子码形成。短子码可以是扩充或截断的奇数码。在接收机处，优选地使用单个匹配滤波器来产生由子码的周期分隔的一系列尖峰。警报/确认检测器不相干地将各个相关尖峰相加并拒绝假警报。警报功能测量总相关能量并根据此调整检测阈值，而确认功能确保适当数量的相关尖峰在正确的时间超过检测阈值。前导码及其用于检测的装置优选地用于TDMA扩频通信系统中，其中多个用户站与基站通信，每个时隙（或虚拟时隙）中的一个。

5. 发明授权

US5959980A Timing adjustment control for efficient time division duplex communication 失效
标题翻译：定时调整控制，用于高效的时分双工通信
公开(公告)号：US5959980A
公开(公告)日：1999-09-28
申请号：US464285
申请日：1995-06-05
申请人： Logan Scott
发明人： Logan Scott
IPC分类号： H04B7/26 , H04J3/06 , H04J13/00 , H04W24/00 , H04W28/06 , H04W48/08 , H04W72/02 , H04W72/12 , H04W74/06 , H04W76/02 , H04W88/08 , H04B1/56
CPC分类号： H04J13/00 , H04B7/2656 , H04J3/0682 , H04W56/0005 , H04W56/0045 , H04W56/009 , H04W24/00 , H04W28/06 , H04W48/08 , H04W74/06 , H04W76/02 , H04W88/08
摘要： A system and method for time division duplex communication over a single frequency band wherein guard time overhead is reduced by active adjustment of reverse link transmission timing as a function of round trip propagation time. A time frame is divided into a plurality of time slots, during each of which the base station transmits to a user station and the user station transmits to the base station. Communication is initiated by a round trip timing transaction. In response to a general polling message from the base station, a user station seeking to establish communication transmits a short reply message. The base station calculates the distance of the user station by measuring the propagation delay with respect to receipt of the reply message. The base station sends a timing adjustment command to the user station instructing the user station to advance or retard its timing according to the calculated distance, so as to minimize guard times between time slots. Thereafter, the base station monitors the user station transmissions and periodically commands the user station to advance or retard its timing in a like manner. The user station may transmit a control preamble at the start of each time slot to allow the base station to perform round trip timing calculations, and/or to allow adjustment of user station power or antenna selection.
摘要翻译：一种用于在单个频带上进行时分双工通信的系统和方法，其中通过作为往返传播时间的函数的反向链路传输定时的主动调整来减小保护时间开销。时间帧被分成多个时隙，在每个时隙中，基站向用户站发送，并且用户站向基站发送。通信由一个往返定时事务发起。响应于来自基站的一般轮询消息，寻求建立通信的用户站发送短的应答消息。基站通过测量相对于接收回复消息的传播延迟来计算用户站的距离。基站向用户站发送定时调整命令，指示用户站根据计算出的距离推进或延迟其定时，以最小化时隙之间的保护时间。此后，基站监视用户站传输，并周期性地命令用户站以类似的方式提前或延迟其定时。用户站可以在每个时隙开始时发送控制前同步码，以允许基站执行往返定时计算，和/或允许调整用户站功率或天线选择。

6. 发明授权

US5832022A Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals 失效
标题翻译：用于控制连续相位调制（CPM）信号的调制指数的方法和装置
公开(公告)号：US5832022A
公开(公告)日：1998-11-03
申请号：US459326
申请日：1995-06-02
申请人： Logan Scott
发明人： Logan Scott
IPC分类号： H04L27/20 , H04L27/30 , H04L25/03 , H04L25/49
CPC分类号： H04L27/201
摘要： A transceiver uses feedback control to monitor a transmitted continuous phase modulation (CPM) waveform, such as a spread spectrum CPM waveform, and adjust the modulation index in response thereto. Codewords are selected from a table according to a data signal and applied to a pulse shaping network. The pulse shaping network outputs a CPM waveform to a prefilter. The prefilter is connected to an FM modulator, such as a voltage controlled oscillator. In one embodiment, a correlator in the transceiver monitors the transmitted waveform during times when the transceiver is not receiving signals, and provides a correlation signal to a feedback control circuit. The feedback control circuit dynamically adjusts the gain of the prefilter, and may comprise, e.g., a second order tracking loop filter. The feedback control signal thereby tracks the amplitude of the transmitted waveform and adjusts the output gain of the prefilter so as to maintain a constant signal envelope. A tau-dither algorithm may be employed as part of the tracking circuit. In an alternative embodiment, a gradient search is used to adjust the output amplitude of the transmitted signal, wherein the step size of the gradient search is based on the slope of the signal amplitude and varied dynamically over time. In another embodiment, a two bandwidth differencing circuit is used to adjust the output amplitude of the transmitted signal.
摘要翻译：收发器使用反馈控制来监视发射的连续相位调制（CPM）波形，例如扩频CPM波形，并响应于此调整调制指数。代码字根据数据信号从表中选择并应用于脉冲整形网络。脉冲整形网络向预滤波器输出CPM波形。预滤波器连接到FM调制器，例如压控振荡器。在一个实施例中，在收发器未接收信号的时间期间，收发器中的相关器监视发送的波形，并且向反馈控制电路提供相关信号。反馈控制电路动态地调节预滤波器的增益，并且可以包括例如二阶跟踪环路滤波器。反馈控制信号从而跟踪传输波形的幅度，并调整预滤波器的输出增益，以保持恒定的信号包络。可以采用波束抖动算法作为跟踪电路的一部分。在替代实施例中，使用梯度搜索来调整发射信号的输出幅度，其中梯度搜索的步长大小基于信号幅度的斜率并随时间动态变化。在另一个实施例中，使用双带宽差分电路来调整发射信号的输出幅度。

7. 发明授权

US5754584A Non-coherent spread-spectrum continuous-phase modulation communication system 失效
标题翻译：非相干扩频连续相位调制通信系统
公开(公告)号：US5754584A
公开(公告)日：1998-05-19
申请号：US480443
申请日：1995-06-07
申请人： Randolph L. Durrant , Mark T. Burbach , Ryan N. Jensen , Logan Scott , Claude M. Williams
发明人： Randolph L. Durrant , Mark T. Burbach , Ryan N. Jensen , Logan Scott , Claude M. Williams
IPC分类号： H04B20060101 , H04B1/707 , H04J13/00 , H04J14/00 , H04L27/20 , H04L27/227 , H04L27/233
CPC分类号： H04B1/707 , H04B1/708 , H04J13/10 , H04L27/2014 , H04L27/2278 , H04L27/2332 , H04B1/7093 , H04B2201/70701 , H04J14/005
摘要： A technique for modulating and demodulating CPM spread spectrum signals and variations of CPM spread spectrum signals. A spread spectrum transmitter includes a chip sequence generator for generating a chip sequence from a data stream, a switch for dividing said chip sequence into an odd chip sequence and an even chip sequence, and a modulator for generating and transmitting a continuous phase modulated signal from said odd chip sequence and said even chip sequence. A spread spectrum receiver comprises a plurality of non-coherent serial CPM correlators, each generating a correlation signal. In a preferred embodiment, the chip sequence generator of the transmitter comprises a table of symbol codes, each symbol code comprising a series of chips corresponding to a unique series of bits in said data stream, and each non-coherent serial CPM correlator is configured to detect one of the symbol codes. The spread spectrum receiver selects a data symbol based on said correlation signals output from the non-coherent serial CPM correlators. A spread spectrum preamble may be used to set initial timing for the non-coherent serial CPM correlators.
摘要翻译：用于调制和解调CPM扩频信号和CPM扩频信号变化的技术。扩频发射机包括用于从数据流产生码片序列的码片序列发生器，用于将所述码片序列划分为奇数码片序列和偶数码片序列的开关，以及调制器，用于产生和发送连续相位调制信号所述奇数芯片序列和所述均匀码片序列。扩频接收机包括多个非相干串行CPM相关器，每个相关器产生相关信号。在优选实施例中，发射机的码片序列发生器包括符号码表，每个符号码包括对应于所述数据流中唯一一系列比特的一系列码片，并且每个非相干序列CPM相关器被配置为检测其中一个符号代码。扩频接收机基于从非相干串行CPM相关器输出的所述相关信号来选择数据符号。可以使用扩展频谱前同步码来设置非相干串行CPM相关器的初始定时。

8. 发明授权

US5671219A Communication protocol for spread spectrum communication 失效
标题翻译：通信协议用于扩频通信
公开(公告)号：US5671219A
公开(公告)日：1997-09-23
申请号：US473746
申请日：1995-06-07
申请人： Ryan N. Jensen , Claude M. Williams , Logan Scott
发明人： Ryan N. Jensen , Claude M. Williams , Logan Scott
IPC分类号： H04J13/00 , G10L19/00 , H04B7/005 , H04B7/08 , H04B7/10 , H04B7/26 , H04J3/00 , H04J3/17 , H04L1/00 , H04L1/20 , H04L12/56 , H04W16/10 , H04W36/08 , H04W36/18 , H04W36/36 , H04W52/00 , H04W52/04 , H04W52/08 , H04W52/24 , H04W52/36 , H04W52/40 , H04W56/00 , H04W72/02 , H04W72/04 , H04W72/12 , H04W74/06 , H04W92/12 , H04J3/12
CPC分类号： H04W74/06 , G10L19/012 , H04B7/2618 , H04B7/2643 , H04L1/0002 , H04L1/0025 , H04L1/20 , H04L12/5693 , H04L47/14 , H04L47/522 , H04L47/6215 , H04L49/90 , H04L49/901 , H04W36/0055 , H04W52/04 , H04W52/08 , H04W52/36 , H04W52/40 , H04W72/1278 , H04B7/0805 , H04B7/10 , H04B7/2668 , H04W24/10 , H04W36/18 , H04W36/30 , H04W36/36 , H04W52/24 , H04W52/362 , H04W52/367 , H04W52/38 , H04W56/00 , H04W72/044 , H04W72/0446 , H04W76/02 , H04W92/12
摘要： A simple and flexible over-air protocol for use with a mobile telephone system, having hand-held telephones in a microcell or other type of cellular communication system. A method in which user stations communicate with one or more base stations to place and receive telephone calls, in which the user stations are provided a secure voice or data link and have the ability to handoff calls between base stations while such calls are in progress. Each base station has a set of "air channels" to which it transmits in sequence. The air channels supported by each base station are called that base station's "polling loop". A user station receives general polling information on an unoccupied air channel, transmits responsive information to the base station, and awaits acknowledgment from the base station. Each base station may therefore simultaneously maintain communication with as many user stations as there are air channels in its polling loop. The ability of a user station to communicate on any unoccupied air channel makes the protocol air-channel agile, while the stability of user station and base station clocks may define air channels, gaps, and minor frames.
摘要翻译：一种与移动电话系统一起使用的简单灵活的空中协议，在微小区或其他类型的蜂窝通信系统中具有手持电话。一种方法，其中用户站与一个或多个基站进行通信以放置和接收电话呼叫，其中向用户站提供安全语音或数据链路，并且具有在正在进行呼叫的情况下在基站之间切换呼叫的能力。每个基站具有一组依次传输的“空中信道”。每个基站支持的空中信道称为基站的“轮询循环”。用户站接收关于未占用空中信道的一般轮询信息，向基站发送响应信息，并等待来自基站的确认。因此，每个基站可以同时维持与其轮询循环中的空中信道一样多的用户站的通信。用户台在任何未占用的空中信道上进行通信的能力使得协议空中通道灵活，而用户站和基站时钟的稳定性可以定义空中信道，间隙和次要帧。

9. 发明授权

US09135669B2 Interrogation system employing prior knowledge about an object to discern an identity thereof 有权
公开(公告)号：US09135669B2
公开(公告)日：2015-09-15
申请号：US12396207
申请日：2009-03-02
申请人： Steven D. Roemerman , John P. Volpi , Logan Scott
发明人： Steven D. Roemerman , John P. Volpi , Logan Scott
IPC分类号： G08B13/14 , G06Q50/30 , G06Q10/08
CPC分类号： G06Q50/30 , G06Q10/08 , G06Q10/087
摘要： An interrogation system employable with an object having a radio frequency identification (RFID) tag and method of operating the same. In one embodiment, the interrogation system includes a database having prior knowledge about the object, and an interrogator that scans the RFID tag and discerns additional information therefrom about the object. The interrogator still further includes a control system that identifies the object based on the prior knowledge and the additional information.

10. 发明申请

US20090160605A1 Interrogation System Employing Prior Knowledge About an Object to Discern an Identity Thereof 审中-公开
标题翻译：询问系统采用先验知识关于对象来识别身份
公开(公告)号：US20090160605A1
公开(公告)日：2009-06-25
申请号：US12396207
申请日：2009-03-02
申请人： Steven D. Roemerman , John P. Volpi , Logan Scott
发明人： Steven D. Roemerman , John P. Volpi , Logan Scott
IPC分类号： G05B19/00 , H04Q5/22
CPC分类号： G06Q50/30 , G06Q10/08 , G06Q10/087
摘要： An interrogation system employable with an object having a radio frequency identification (RFID) tag and method of operating the same. In one embodiment, the interrogation system includes a database having prior knowledge about the object, and an interrogator that scans the RFID tag and discerns additional information therefrom about the object. The interrogator still further includes a control system that identifies the object based on the prior knowledge and the additional information.
摘要翻译：一种可利用具有射频识别（RFID）标签的对象的操作系统的询问系统及其操作方法。在一个实施例中，询问系统包括具有关于对象的先前知识的数据库，以及询问器，其扫描RFID标签并从其中辨别关于对象的附加信息。询问器还包括基于现有知识和附加信息识别对象的控制系统。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式