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31. 发明授权

US06992564B2 Cordless identification security system and method 有权
公开(公告)号：US06992564B2
公开(公告)日：2006-01-31
申请号：US09909369
申请日：2001-07-19
申请人： Sean A. Connolly , William Sackett , Stephen J. Shellhammer , Frank Boccuzzi , Adam Levine
发明人： Sean A. Connolly , William Sackett , Stephen J. Shellhammer , Frank Boccuzzi , Adam Levine
IPC分类号： G06F7/00
CPC分类号： G06K17/00 , G06K2017/0045
摘要： A system and method described for tracking portable devices. The system may include a transmitter which transmits wireless inquiries to a plurality of portable devices and a receiver receiving replies to the inquiries from the portable devices. In addition, the system may include a memory storing identifier data corresponding to the portable devices and a processor coupled to the memory and to the receiver, the processor retrieving from each reply, identifier data uniquely identifying a particular one of the portable devices which generated the reply and comparing the identifier data to the stored identifier data. Furthermore, the system may include an alarm system coupled to the processor and controlled based on the comparison of stored identifier data to the identifier data retrieved from the replies.

32. 发明授权

US06672506B2 Statistical sampling security methodology for self-scanning checkout system 有权
标题翻译：自动扫描结帐系统的统计抽样安全方法
公开(公告)号：US06672506B2
公开(公告)日：2004-01-06
申请号：US09977477
申请日：2001-10-15
申请人： Jerome Swartz , Stephen J. Shellhammer , Joseph Katz , Theo Pavlidis , John Woffinden , Judith Murrah , Edward Beadle , Raj Bridgelall
发明人： Jerome Swartz , Stephen J. Shellhammer , Joseph Katz , Theo Pavlidis , John Woffinden , Judith Murrah , Edward Beadle , Raj Bridgelall
IPC分类号： G06K1500
CPC分类号： G06Q30/06 , G07G1/0054 , G07G3/003
摘要： A statistical basis for use in a self-scanning checkout system determines how many items to check in a shopper's shopping cart for incorrect or missing scans as well as which particular or types of items to check to determine if they were properly scanned, if the shopper is determined to be audited. The present invention does not audit every customer, but rather determines whether a given shopper or customer is to be audited on a given shopping trip based upon obtaining a minimum checkout loss for such customer. The methodology determines how many items to check for a given shopper as well as which particular items to check for that shopper. The following factors attempt to model the real world of shopping and may be considered, alone or in varying combinations, in determining the number of items to check for a particular shopping transaction: shopper frequency; queue length; prior audit history; store location; time of day, day of week, date of year; number of times items are returned to shelf during shopping; dwell time between scans; customer loyalty; store shopping activity and other factors. Using statistical decision theory for auditing policies a minimum loss per shopper transaction improves the security and reduces the labor of self-check out without being too intrusive to customers.
摘要翻译：用于自动扫描结帐系统的统计基础确定购物者购物车中检查不正确或缺少扫描的物品以及要检查的哪些特定或类型的物品，以确定它们是否被正确扫描，如果购物者决定被审计。本发明不审核每个客户，而是基于获得这样的客户的最小结账损失来确定给定的购物者或客户是否将在给定的购物行程上被审核。该方法确定了为特定购物者检查多少项目，以及哪些特定项目来检查购物者。以下因素试图建模购物的真实世界，并且可以单独地或以不同的组合来考虑确定特定购物交易的项目数量：购物者频率; 队列长度以前的审计历史; 商店位置; 时间，星期几，日期; 商品在购物时返回货架的次数; 停留扫描之间的时间; 客户忠诚度; 商店购物活动等因素。使用统计决策理论对审计政策，每个购物者交易的最小损失提高了安全性，减少了自我检查的劳动，而不会太多侵入客户。

33. 发明授权

US5523552A Method and apparatus to scan randomly oriented two-dimensional bar code symbols 失效
标题翻译：扫描随机取向的二维条形码符号的方法和装置
公开(公告)号：US5523552A
公开(公告)日：1996-06-04
申请号：US327531
申请日：1994-10-19
申请人： Stephen J. Shellhammer , Joseph Katz , Ron Goldman
发明人： Stephen J. Shellhammer , Joseph Katz , Ron Goldman
IPC分类号： G06K7/015 , G06K7/10
CPC分类号： G06K7/10871
摘要： Disclosed are methods and apparatus for automatically aligning the field of view of a two dimensional bar code reading device with a randomly oriented two-dimensional bar code symbol wherein the symbol comprises a unique pattern located contiguously on at least one side thereof. One method is implemented in a laser based embodiment by scanning the symbol with a laser scan line extending through the border pattern (which is a PDF417 start codeword), measuring the length of the start codeword detected by the scan line, and rotating the laser scan line by a predetermined amount. This is repeated for a predetermined number of times, and the rotation angle at which the codeword length is smallest is determined by performing a least squares fit of the measured codeword lengths and rotation angles. The raster pattern is then rotated to the determined rotation angle so as to be aligned with the symbol for subsequent scanning and decoding. In the alternative, a sequential least squares fit can be performed after each start codeword measurement is made rather than waiting for all measurements to be made. An alternative embodiment implements a discrete radial CCD array comprised of linear CCD arrays which enables angular scanning of the target symbol, wherein a two-dimensional CCD array is then rotated either physically or logically by the calculated skew angle in order to be aligned with the symbol for imaging and subsequent processing and decoding.
摘要翻译：公开了用于将二维条形码读取装置的视野自动对准随机取向的二维条形码符号的方法和装置，其中符号包括在其至少一侧上连续定位的唯一图案。一种方法在基于激光的实施例中通过用延伸穿过边界图案的激光扫描线（其是PDF417起始码字）扫描符号，测量由扫描线检测的起始码字的长度，以及旋转激光扫描行预定量。这被重复预定次数，并且通过执行测量的码字长度和旋转角度的最小二乘拟合来确定码字长度最小的旋转角度。然后将光栅图案旋转到所确定的旋转角度，以便与用于后续扫描和解码的符号对齐。在替代方案中，可以在进行每个开始码字测量之后执行顺序的最小二乘拟合，而不是等待进行所有测量。一个替代实施例实现了由线性CCD阵列组成的离散径向CCD阵列，其能够对目标符号进行角度扫描，其中二维CCD阵列然后物理或逻辑地旋转所计算的偏斜角，以便与符号对齐用于成像和后续处理和解码。

34. 发明授权

US09813994B2 Managing transmit power for better frequency re-use in TV white space 有权
公开(公告)号：US09813994B2
公开(公告)日：2017-11-07
申请号：US13397450
申请日：2012-02-15
申请人： Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath , Stephen J. Shellhammer , Rahul Tandra
发明人： Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath , Stephen J. Shellhammer , Rahul Tandra
IPC分类号： H04W24/00 , H04W52/04 , H04B7/12 , H04L1/00 , H04W52/32 , H04W74/08 , H04L1/06 , H04W52/36
CPC分类号： H04W52/04 , H04B7/12 , H04L1/0002 , H04L1/0009 , H04L1/0027 , H04L1/06 , H04W16/14 , H04W52/325 , H04W52/367 , H04W74/0816
摘要： Certain aspects of the present disclosure provide techniques and apparatus for managing transmit power in a television white space (TVWS) network. One example method generally includes transmitting a sequence of request-to-send (RTS) messages at different transmit power levels to an apparatus and determining if a clear-to-send (CTS) message was received in response to at least one of the RTS messages corresponding to a particular one of the transmit power levels. Another example method generally includes receiving, at a first apparatus from a second apparatus, a packet that cannot be decoded by the first apparatus; determining at least one of a time or a duration corresponding to the packet; transmitting a query with an indication of the at least one of the time or the duration; and receiving a message from the second apparatus in response to the query, the message identifying the second apparatus as a source of the packet.

35. 发明授权

US09609520B2 Methods and apparatuses for communicating in television white space (TVWS) based on TVWS enablement signal 有权
公开(公告)号：US09609520B2
公开(公告)日：2017-03-28
申请号：US13349501
申请日：2012-01-12
申请人： Stephen J. Shellhammer , Cong Shen , Rahul Tandra , Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath
发明人： Stephen J. Shellhammer , Cong Shen , Rahul Tandra , Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath
IPC分类号： H04W72/04 , H04W16/14 , H04W84/12
CPC分类号： H04W16/14 , H04W84/12
摘要： Certain aspects of the present disclosure relate to techniques for supporting television white space (TVWS) communication. In an aspect of the present disclosure, a low-rate TVWS enabler (Mode II wireless communication device) may provide initial enablement for all Mode I devices (e.g., access points and user terminals), as well as it may transmit a contact verification signal (CVS) on a regular basis to keep the Mode I devices enabled for the TVWS communication.

36. 发明申请

US20130148517A1 MANAGING TRANSMIT POWER FOR BETTER FREQUENCY RE-USE IN TV WHITE SPACE 有权
标题翻译：管理发射功率，在电视白天更好的频率重新使用
公开(公告)号：US20130148517A1
公开(公告)日：2013-06-13
申请号：US13397450
申请日：2012-02-15
申请人： Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath , Stephen J. Shellhammer , Rahul Tandra
发明人： Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath , Stephen J. Shellhammer , Rahul Tandra
IPC分类号： H04W52/04
CPC分类号： H04W52/04 , H04B7/12 , H04L1/0002 , H04L1/0009 , H04L1/0027 , H04L1/06 , H04W16/14 , H04W52/325 , H04W52/367 , H04W74/0816
摘要： Certain aspects of the present disclosure provide techniques and apparatus for managing transmit power in a television white space (TVWS) network. One example method generally includes transmitting a sequence of request-to-send (RTS) messages at different transmit power levels to an apparatus and determining if a clear-to-send (CTS) message was received in response to at least one of the RTS messages corresponding to a particular one of the transmit power levels. Another example method generally includes receiving, at a first apparatus from a second apparatus, a packet that cannot be decoded by the first apparatus; determining at least one of a time or a duration corresponding to the packet; transmitting a query with an indication of the at least one of the time or the duration; and receiving a message from the second apparatus in response to the query, the message identifying the second apparatus as a source of the packet.
摘要翻译：本公开的某些方面提供了用于管理电视空白（TVWS）网络中的发射功率的技术和装置。一个示例性方法通常包括以不同发射功率电平向装置发射请求发送（RTS）消息的序列，并且响应于RTS中的至少一个确定是否接收到清除发送（CTS）消息对应于发射功率电平中的特定一个的消息。另一示例性方法通常包括在第一装置从第二装置接收不能由第一装置解码的分组; 确定对应于分组的时间或持续时间中的至少一个; 发送具有时间或持续时间中的至少一个的指示的查询; 以及响应于所述查询从所述第二装置接收消息，所述消息将所述第二装置识别为所述分组的源。

37. 发明申请

US20130090071A1 SYSTEMS AND METHODS FOR COMMUNICATION IN A WHITE SPACE 有权
标题翻译：一个白色空间通信的系统和方法
公开(公告)号：US20130090071A1
公开(公告)日：2013-04-11
申请号：US13438355
申请日：2012-04-03
申请人： Santosh Paul Abraham , Stephen J. Shellhammer
发明人： Santosh Paul Abraham , Stephen J. Shellhammer
IPC分类号： H04B1/38
CPC分类号： H04B1/38 , H04W16/14 , H04W48/14
摘要： Systems, methods, and devices to communicate in a white space are described herein. In some aspects, wireless communication transmitted in the white space authorizes an initial transmission by a device. The wireless communication may include power information for determining a power at which to transmit the initial transmission. The initial transmission may be used to request information identifying one or more channels in the white space available for transmitting data.
摘要翻译：这里描述了在白色空间中通信的系统，方法和设备。在一些方面，在白色空间中发送的无线通信授权设备的初始传输。无线通信可以包括用于确定发送初始传输的功率的功率信息。初始传输可以用于请求识别可用于发送数据的空白区域中的一个或多个信道的信息。

38. 发明申请

US20120263156A1 METHOD AND APPARATUS FOR GENERATING VARIOUS TRANSMISSION MODES FOR WLAN SYSTEMS 有权
标题翻译：用于生成WLAN系统的各种传输模式的方法和装置
公开(公告)号：US20120263156A1
公开(公告)日：2012-10-18
申请号：US13445753
申请日：2012-04-12
申请人： Santosh Paul Abraham , Vincent Knowles Jones, IV , Hemanth Sampath , Didier Johannes Richard Van Nee , Sameer Vermani , Stephen J. Shellhammer
发明人： Santosh Paul Abraham , Vincent Knowles Jones, IV , Hemanth Sampath , Didier Johannes Richard Van Nee , Sameer Vermani , Stephen J. Shellhammer
IPC分类号： H04W84/12
CPC分类号： H04L5/0023 , H04L5/0044 , H04W16/14 , H04W72/044 , H04W72/0453 , H04W84/12
摘要： Certain aspects of the present disclosure relate to a technique for generating 40+40 MHz and 40+40+40+40 MHz transmission modes for IEEE 802.11 wireless communications systems using Very High Throughput (VHT) waveforms with application to Television White Space (TVWS) spectrum.
摘要翻译：本公开的某些方面涉及用于为应用于电视白色空间（TVWS）的非常高吞吐量（VHT）波形的IEEE 802.11无线通信系统生成40 + 40MHz和40 + 40 + 40 + 40MHz传输模式的技术。光谱。

39. 发明申请

US20120238226A1 DATA TRANSMISSION COEXISTENCE USING CONSTANT SYMBOL DURATION WITHIN TELEVISION WHITE SPACE CHANNELS 审中-公开
标题翻译：数据传输在电视空白通道中使用恒定符号时间
公开(公告)号：US20120238226A1
公开(公告)日：2012-09-20
申请号：US13398842
申请日：2012-02-17
申请人： Sameer Vermani , Santosh Paul Abraham , Vincent Knowles Jones , Stephen J. Shellhammer , Didier Johannes Richard Van Nee , Albert van Zelst , Rahul Tandra
发明人： Sameer Vermani , Santosh Paul Abraham , Vincent Knowles Jones , Stephen J. Shellhammer , Didier Johannes Richard Van Nee , Albert van Zelst , Rahul Tandra
IPC分类号： H04B1/04 , H04B1/16
CPC分类号： H04L5/0039 , H04L5/0007 , H04L27/0006 , H04W16/14
摘要： Methods, systems, and/or devices are provided that permit data transmissions over unused television channels. An unused channel within a television broadcast frequency spectrum is first identified. A downclocked waveform (for data transmission) is then generated by applying a factor to a clock that causes a waveform bandwidth to be reduced from a first bandwidth to a second bandwidth, wherein the second bandwidth of the downclocked waveform is less than a channel bandwidth for the identified unused channel. The downclocked waveform may then be configured so that it coexists with a larger waveform having a third bandwidth that is greater than the channel bandwidth. The downclocked waveform is then wirelessly transmitted from the transmitter device over the identified unused channel.
摘要翻译：提供允许在未使用的电视频道上进行数据传输的方法，系统和/或设备。首先确定电视广播频谱内未使用的频道。然后通过对使时钟产生波形带宽从第一带宽减小到第二带宽的因子来产生用于数据传输的倒频波形，其中，所述低频波形的第二带宽小于识别的未使用的通道。然后可以配置倒频波形，使得其与具有大于信道带宽的第三带宽的较大波形共存。然后，通过所识别的未使用的信道，从发射机设备无线地发射该衰减的波形。

40. 发明授权

US08027690B2 Methods and apparatus for sensing the presence of a transmission signal in a wireless channel 有权
标题翻译：用于感测无线信道中传输信号的存在的方法和装置
公开(公告)号：US08027690B2
公开(公告)日：2011-09-27
申请号：US12186500
申请日：2008-08-05
申请人： Stephen J. Shellhammer
发明人： Stephen J. Shellhammer
IPC分类号： H04W72/00
CPC分类号： H04W16/14 , H04B17/391 , H04K3/822 , H04K2203/12
摘要： Methods and apparatus for sensing the presence of a transmission signal type within a wireless channel in a wireless communication system, such as those including the use of wireless microphones, are described. Sensing the transmission signal type includes calculating a spectral density estimate of a signal on the wireless channel. A first test value, derived from the calculated spectral density estimate, is compared to a first threshold. A preliminary determination of the presence of the transmission signal type is made if the first test value exceeds the first threshold. Sensing the presence of the signal type after preliminary determination of the presence of the signal type is made by determining that an observed spectral density of a prescribed signal added to the signal on the wireless channel matches a model estimate of the spectral density of the prescribed signal to a sufficient degree.
摘要翻译：描述了在无线通信系统（例如包括使用无线麦克风的那些）中的用于感测无线信道内的传输信号类型的存在的方法和装置。感测传输信号类型包括计算无线信道上的信号的频谱密度估计。将从计算的频谱密度估计导出的第一测试值与第一阈值进行比较。如果第一测试值超过第一阈值，则进行传输信号类型的存在的初步确定。通过确定添加到无线信道上的信号的规定信号的观测频谱密度与规定信号的频谱密度的模型估计相匹配来进行信号类型的存在的初步确定之后，感测出信号类型的存在足够的程度。

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