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11. 发明授权

US08265011B2 High resolution wireless indoor positioning system for legacy standards-based narrowband mobile radios 失效
标题翻译：高分辨率无线室内定位系统，用于传统基于标准的窄带移动无线电
公开(公告)号：US08265011B2
公开(公告)日：2012-09-11
申请号：US13355557
申请日：2012-01-22
申请人： Gary L. Sugar , Chandra Vaidyanathan , Yohannes Tesfai
发明人： Gary L. Sugar , Chandra Vaidyanathan , Yohannes Tesfai
IPC分类号： H04W4/00
CPC分类号： G01S5/0221 , G01S5/021 , G01S5/0215
摘要： Two or more data packets transmitted through a wireless channel are received using a receiver device. The two or more data packets are a result of two or more transmissions that are made sequentially in time at different center frequencies in order to span a desired bandwidth. Each data packet of the two or more data packets is transmitted at a single center frequency. Time differences and/or carrier phase differences among the two or more transmissions are estimated. A time-of-arrival of one or more data packets of the two or more data packets is calculated using each data packet of the two or more data packets and one or more of the estimated time differences, the different center frequencies, and the estimated carrier phase differences.
摘要翻译：通过无线信道发送的两个或多个数据分组使用接收机设备接收。两个或多个数据分组是在不同的中心频率上按时间顺序进行的两个或多个传输的结果，以便跨越期望的带宽。两个或多个数据分组的每个数据分组以单个中心频率发送。估计两个或更多个传输之间的时差和/或载波相位差。使用两个或多个数据分组的每个数据分组来计算两个或多个数据分组的一个或多个数据分组的到达时间，并且估计的时间差，不同的中心频率和估计的载波相位差。

12. 发明申请

US20090239486A1 APPARATUS FOR ANTENNA DIVERSITY USING JOINT MAXIMAL RATIO COMBINING 审中-公开
标题翻译：使用联合最大比率组合的天线多样性设备
公开(公告)号：US20090239486A1
公开(公告)日：2009-09-24
申请号：US12481385
申请日：2009-06-09
申请人： Gary L. Sugar , Chandra Vaidyanathan , Yohannes Tesfai
发明人： Gary L. Sugar , Chandra Vaidyanathan , Yohannes Tesfai
IPC分类号： H04B1/02
CPC分类号： H04L5/0007 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0417 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0671 , H04B7/0845 , H04B7/0848 , H04B7/0854 , H04B7/0857 , H04L1/06 , H04L25/0204 , H04L25/0228 , H04L25/0242 , H04L25/03343 , H04L27/2602 , H04L27/2626 , H04L2025/03426 , H04L2025/03611 , H04W52/42
摘要： A method for improving performance of radio frequency (RF) communication of a station (STA) having an access point (AP) is disclosed. The method includes using an arbitrary set of transmit antenna weights, calculating a set of receive antenna weights, and updating the transmit antenna weights based on the receive antenna weights.
摘要翻译：公开了一种用于提高具有接入点（AP）的站（STA）的射频（RF）通信性能的方法。该方法包括使用任意发射天线权重集合，计算一组接收天线权重，以及基于接收天线权重更新发射天线权重。

13. 发明授权

US07050452B2 Systems and methods for interference mitigation among multiple WLAN protocols 有权
公开(公告)号：US07050452B2
公开(公告)日：2006-05-23
申请号：US09970846
申请日：2001-10-05
申请人： Gary L. Sugar , William R. Seed , Yohannes Tesfai
发明人： Gary L. Sugar , William R. Seed , Yohannes Tesfai
IPC分类号： H04J3/16 , H04J3/22
CPC分类号： H04W16/14 , H04L1/16 , H04W28/26 , H04W74/085 , H04W80/00 , H04W84/12
摘要： Interference mitigation or collision avoidance systems and procedures to allow different wireless local area network (WLAN) communication protocols to co-exist in the same frequency band, such as an unlicensed frequency band used for short-range wireless communications. The procedures ensure substantial throughput of information carried by signals of each WLAN protocol while preventing collisions between signals of different protocols.

14. 发明授权

US07317419B2 Self-calibrated path loss position estimation and zone of impact determination 有权
标题翻译：自校准路径损耗位置估计和冲击测定区域
公开(公告)号：US07317419B2
公开(公告)日：2008-01-08
申请号：US11156463
申请日：2005-06-21
申请人： Gary L. Sugar , Yohannes Tesfai
发明人： Gary L. Sugar , Yohannes Tesfai
IPC分类号： G01S3/02
CPC分类号： G01S11/06 , G01S5/0252 , G01S5/14
摘要： A device and method are provided for estimating a position of a target device (e.g., a device emitting radio frequency energy) based on data pertaining to strength of an emission received from the target device. At a mobile device, emissions are received from the target device when the mobile device is at each of a plurality of positions to produce receive signal strength data representative thereof. The mobile device, also recieves signals from each of a plurality of reference devices at a corresponding known position when the mobile device is at each of the plurality of positions. The position of the target device is estimated based on receive signal strength data associated with received emissions from the target device and from the reference devices. Using the estimated position and estimated transmit power of the target device, a zone of impact of the target device is determined with respect to other wireless activity based on the estimated position and estimated transmit power of the target device.
摘要翻译：提供了一种用于基于从目标设备接收的发射强度的数据来估计目标设备（例如，发射射频能量的设备）的位置的设备和方法。在移动设备处，当移动设备处于多个位置中的每一个位置时，从目标设备接收发射，以产生表示其的接收信号强度数据。当移动设备处于多个位置中的每个位置时，移动设备还从相应的已知位置接收来自多个参考设备中的每一个的信号。基于与来自目标设备和参考设备的接收到的发射相关联的接收信号强度数据来估计目标设备的位置。使用目标设备的估计位置和估计发射功率，基于目标设备的估计位置和估计发射功率，相对于其他无线活动来确定目标设备的影响区域。

15. 发明授权

US07236128B2 System and method for locating radio emitters using self-calibrated path loss computation 有权
标题翻译：使用自校准路径损耗计算定位无线电发射器的系统和方法
公开(公告)号：US07236128B2
公开(公告)日：2007-06-26
申请号：US10976509
申请日：2004-10-29
申请人： Gary L. Sugar , Yohannes Tesfai
发明人： Gary L. Sugar , Yohannes Tesfai
IPC分类号： G01S3/02
CPC分类号： G01S5/0226 , G01S5/0252
摘要： Techniques for reducing the complexity and improving the accuracy of receive signal strength based location systems. The system comprises a plurality of radio sensor devices placed at known positions within a space in which devices are to be located. According to one technique, the path loss is measured between all combinations of pairs of radio sensor devices based on a test signal transmitted by each radio sensor device. A path loss model is evaluated to compute modeled path loss data between all combinations of pairs of radio sensor devices. For each measured path loss, a path loss error relative to each radio sensor device is computed by taking the difference between the measured path loss and the modeled path loss. The path loss error relative to each radio sensor device at any candidate position is interpolated from the computed path loss errors. A path loss estimate between a candidate position and each radio sensor device is computed by adding the interpolated path loss error relative to that radio sensor device at the candidate position and path loss data obtained by evaluating the path loss model based on the distance between at each candidate position and the corresponding radio sensor device. When determining the position of a device emitting radio signals (called a target device), the improved path loss estimate is used. According to another technique, for each radio sensor device, parameters are derived for a path loss model function from the measured path loss between that radio sensor device and each of the other radio sensor devices using a minimization computation. Then, a path loss estimate between a position and each radio sensor device is computed by evaluating the path loss model function using the parameters derived for each radio sensor device.
摘要翻译：降低接收信号强度的定位系统的复杂性和提高精度的技术。该系统包括放置在设备将位于的空间内的已知位置处的多个无线电传感器装置。根据一种技术，基于由每个无线电传感器设备发送的测试信号，在无线电传感器设备对的所有组合之间测量路径损耗。评估路径损耗模型以在无线电传感器设备对的所有组合之间计算建模的路径损耗数据。对于每个测量的路径损耗，通过获取所测量的路径损耗和建模的路径损耗之间的差异来计算相对于每个无线电传感器设备的路径损耗误差。从计算出的路径损耗误差插入相对于任何候选位置处的每个无线电传感器装置的路径损耗误差。在候选位置与每个无线电传感器装置之间的路径损耗估计是通过将候选位置处的相对于该无线电传感器装置的内插路径损耗误差相加并且通过基于每个无线电传感器装置之间的距离评估路径损耗模型而获得的路径损耗数据来计算的候选位置和相应的无线电传感器设备。当确定发射无线电信号的设备的位置（称为目标设备）时，使用改进的路径损耗估计。根据另一种技术，对于每个无线电传感器设备，使用最小化计算从所述无线电传感器设备和每个其他无线电传感器设备之间的测量路径损耗导出用于路径损耗模型函数的参数。然后，通过使用为每个无线电传感器设备导出的参数评估路径损耗模型函数来计算位置和每个无线电传感器设备之间的路径损耗估计。

16. 发明授权

US06871049B2 Improving the efficiency of power amplifiers in devices using transmit beamforming 有权
标题翻译：提高使用发射波束成形的设备中功率放大器的效率
公开(公告)号：US06871049B2
公开(公告)日：2005-03-22
申请号：US10249063
申请日：2003-03-13
申请人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
发明人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
IPC分类号： H01Q3/28 , H03G3/30 , H04B1/04 , H04B7/005 , H04B7/06 , H04B7/08 , H04L27/26 , H04B1/02 , H04Q11/12
CPC分类号： H04W52/42 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0845 , H04B7/0857 , H04L27/2601
摘要： Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, the power of each amplified signal output by the power amplifiers may not be the same for all the power amplifiers, and may vary with changes in the communication channel between the transmitting device and receiving device. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. By adjusting one or more operating parameters of each power amplifier according to changing requirements (e.g., the destination device and channel conditions), the efficiency of each power amplifier can be optimized. Consequently, one or more of the power amplifiers are operated with one or more operating parameters that reflects the output power actually needed for the corresponding radio frequency signal to be transmitted.
摘要翻译：用于优化多个功率放大器中的每一个功率放大器的效率的系统和方法，其放大多个射频信号中的相应一个，用于由多个天线中的相应一个发射。使用发射波束形成，由功率放大器输出的每个放大信号的功率对于所有功率放大器可能不相同，并且可以随着发射装置和接收装置之间的通信信道的变化而变化。多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。通过根据变化的要求（例如，目的地设备和信道条件）调整每个功率放大器的一个或多个操作参数，可以优化每个功率放大器的效率。因此，一个或多个功率放大器通过一个或多个反映要发射的相应射频信号实际需要的输出功率的工作参数来操作。

17. 发明授权

US07899414B2 Control of power amplifiers in devices using transmit beamforming 有权
标题翻译：使用发射波束成形的设备中功率放大器的控制
公开(公告)号：US07899414B2
公开(公告)日：2011-03-01
申请号：US12506813
申请日：2009-07-21
申请人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
发明人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
IPC分类号： H04B1/04
CPC分类号： H04W52/42 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0845 , H04B7/0857 , H04L27/2601
摘要： A radio transmitter and method controls efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for a beamforming transmission by a corresponding one of a plurality of antennas. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. Transmit weights for transmit signals are determined and updated on a per-packet basis.
摘要翻译：无线电发射机和方法控制多个功率放大器中的每一个的效率，所述功率放大器通过多个天线中的相应一个放大用于波束成形传输的多个射频信号中的相应一个。多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。基于每个分组确定和更新发送信号的发送权重。

18. 发明申请

US20110026630A1 Power Allocation of Spatial Streams in MIMO Wireless Communication System 有权
标题翻译： MIMO无线通信系统中空间流的功率分配
公开(公告)号：US20110026630A1
公开(公告)日：2011-02-03
申请号：US12828574
申请日：2010-07-01
申请人： Paul J. Stager , Gary L. Sugar , Matthew A. Silverman , Zhigang Gao , Chandra Vaidyanathan
发明人： Paul J. Stager , Gary L. Sugar , Matthew A. Silverman , Zhigang Gao , Chandra Vaidyanathan
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0617 , H04B7/0439 , H04L27/2601
摘要： Multiple-input multiple-output (MIMO) wireless communication techniques are provided that involve mapping multiple spatial streams to corresponding modes of a wireless channel between a plurality of antennas of a first wireless communication device and a plurality of antennas of a second wireless communication device so as to allocate or distribute power unequally to the plurality of modes. In addition, techniques are provided herein to cyclically shift a mapping of spatial streams to modes of the channel.
摘要翻译：提供了多输入多输出（MIMO）无线通信技术，其涉及将多个空间流映射到第一无线通信设备的多个天线与第二无线通信设备的多个天线之间的无线信道的相应模式，从而用于分配或分配权力不等于多个模式。此外，本文提供了将空间流的映射循环移位到信道的模式的技术。

19. 发明授权

US07881674B2 System and method for antenna diversity using equal power joint maximal ratio combining 有权
标题翻译：使用等功率联合最大比组合的天线分集的系统和方法
公开(公告)号：US07881674B2
公开(公告)日：2011-02-01
申请号：US11879156
申请日：2007-07-16
申请人： Gary L. Sugar , Chandra Vaidyanathan
发明人： Gary L. Sugar , Chandra Vaidyanathan
IPC分类号： H04B7/02
CPC分类号： H04L25/0204 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0465 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0671 , H04B7/0837 , H04B7/0845 , H04B7/0854 , H04B7/0857 , H04L1/06 , H04L5/0023 , H04L27/2601 , H04L2025/03445 , H04W52/42
摘要： An equal gain composite beamforming technique which includes the constraint that the power of the signal output by each antenna is the same, and is equal to the total power of the transmit signal divided by the number N of transmit antennas from which the signal is to be transmitted. By reducing output power requirements for each power amplifier, the silicon area of the power amplifiers are reduced by as much as N times (where N is equal to the number of transmit antennas) relative to a non-equal gain composite beamforming technique.
摘要翻译：等增益复合波束形成技术，其包括由每个天线输出的信号的功率相同的约束，并且等于发射信号的总功率除以信号将从其发射天线的数量N 传输。通过降低每个功率放大器的输出功率需求，功率放大器的硅面积相对于不相等的增益复合波束形成技术减少了N倍（其中N等于发射天线的数量）。

20. 发明申请

US20090285331A1 CONTROL OF POWER AMPLIFIERS IN DEVICES USING TRANSMIT BEAMFORMING 有权
标题翻译：使用发射波束对设备中的功率放大器进行控制
公开(公告)号：US20090285331A1
公开(公告)日：2009-11-19
申请号：US12506813
申请日：2009-07-21
申请人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
发明人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
IPC分类号： H04L25/03
CPC分类号： H04W52/42 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0845 , H04B7/0857 , H04L27/2601
摘要： A radio transmitter and method controls efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for a beamforming transmission by a corresponding one of a plurality of antennas. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. Transmit weights for transmit signals are determined and updated on a per-packet basis.
摘要翻译：无线电发射机和方法控制多个功率放大器中的每一个的效率，所述功率放大器通过多个天线中的相应一个放大用于波束成形传输的多个射频信号中的相应一个。多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。基于每个分组确定和更新发送信号的发送权重。

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