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41. 发明授权

US08837316B2 RTT based ranging system and method 有权
标题翻译：基于RTT的测距系统和方法
公开(公告)号：US08837316B2
公开(公告)日：2014-09-16
申请号：US13523457
申请日：2012-06-14
申请人： Xiaoxin Zhang , Ning Zhang
发明人： Xiaoxin Zhang , Ning Zhang
IPC分类号： H04J3/06 , H04B17/00 , H04W24/00 , H04B15/00 , H04W64/00 , G01S13/76
CPC分类号： H04W24/00 , G01S13/765 , H04W64/00
摘要： A system and method are disclosed for performing ranging operations (700) between two or more wireless devices (STA1 and STA2). For some embodiments, the ranging operation allows each of a pair of ranging devices to estimate timing errors associated with measuring the time of arrival (TOA) of received signals, and to remove such timing errors from the measured TOA values. TOA and time of departure (TOD) information may also be exchanged between the devices using measurement action frames defined by IEEE 802.11v standards. In addition, an iterative process (800) is disclosed that allows a sequence of measurement action frames exchanged between the ranging devices to refine the timing errors and thus also refine the round trip time (RTT) value of signals exchanged between the devices.
摘要翻译：公开了用于在两个或多个无线设备（STA1和STA2）之间执行测距操作（700）的系统和方法。对于一些实施例，测距操作允许一对测距装置中的每一个估计与测量接收信号的到达时间（TOA）相关联的定时误差，并且从测量的TOA值中去除这些定时误差。也可以使用由IEEE 802.11v标准定义的测量动作帧在设备之间交换TOA和出发时间（TOD）信息。此外，公开了一种迭代过程（800），其允许在测距设备之间交换的测量动作帧序列来细化定时误差，并且因此还改善在设备之间交换的信号的往返时间（RTT）值。

42. 发明授权

US08804612B1 Triggering and transmitting sounding packets for wireless communications 有权
标题翻译：触发和发送用于无线通信的探测包
公开(公告)号：US08804612B1
公开(公告)日：2014-08-12
申请号：US12542642
申请日：2009-08-17
申请人： Chin-Hung Chen , Ning Zhang
发明人： Chin-Hung Chen , Ning Zhang
IPC分类号： H04W4/00 , H04B7/04 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0404 , H04B7/0417 , H04B7/0452 , H04B7/0617 , H04B7/0626 , H04B7/0634 , H04L1/16 , H04L25/0204 , H04L2025/03426 , H04W24/10
摘要： The antenna configurations of a wireless communications system including a beamformer and beamformee may be changed. In an improved technique for triggering a sounding packet, notification of an antenna re-configuration, either at the beamformer or the beamformee can be quickly used by the beamformer to trigger the sounding packet. In one embodiment, the beamformee can perform its own computations to determine a changing channel. In this embodiment, once a changing channel is detected, the beamformee can notify the beamformer to trigger the sounding packet.
摘要翻译：可以改变包括波束形成器和波束形成器的无线通信系统的天线配置。在用于触发探测分组的改进技术中，波束形成器或波束形成器的天线重新配置的通知可以被波束形成器快速地用于触发探测分组。在一个实施例中，波束形成器可以执行其自己的计算以确定改变的信道。在本实施例中，一旦检测到改变的信道，波束形成器可以通知波束形成器触发发声分组。

43. 发明授权

US08724750B2 Adjacent channel rejection of a CCK blocker 失效
标题翻译： CCK阻滞剂的相邻通道排斥
公开(公告)号：US08724750B2
公开(公告)日：2014-05-13
申请号：US12979943
申请日：2010-12-28
申请人： Chi-Lin Su , Ning Zhang
发明人： Chi-Lin Su , Ning Zhang
IPC分类号： H03D1/04
CPC分类号： H04L23/02 , H04B1/7097 , H04L25/03159 , H04L27/0006 , H04L27/0012 , H04L27/2647 , H04L2025/03426
摘要： An adjacent channel interference rejection mechanism is provided to detect and reject CCK-modulated signals from an adjacent channel in a wireless communication receiver. Replicas of the baseband signals are frequency-shifted and then analyzed through a series of correlations to compare the power of the correlation outputs. An adjacent channel interference of a CCK-modulated signal is determined and rejected based on the comparisons meeting a predetermined tolerance level.
摘要翻译：提供了一种相邻信道干扰抑制机制，用于在无线通信接收机中检测和拒绝来自相邻信道的CCK调制信号。基带信号的副本被频移，然后通过一系列相关性进行分析，以比较相关输出的功率。基于满足预定公差等级的比较，确定并拒绝CCK调制信号的相邻信道干扰。

44. 发明授权

US08681896B1 Transmitter I/Q and carrier leak calibration 失效
标题翻译：变送器I / Q和载波泄漏校准
公开(公告)号：US08681896B1
公开(公告)日：2014-03-25
申请号：US12779595
申请日：2010-05-13
申请人： Chin-Hung Chen , Ning Zhang
发明人： Chin-Hung Chen , Ning Zhang
IPC分类号： H04L25/49
CPC分类号： H04L27/3863 , H04B1/30
摘要： Joint transmit error (i.e., carrier leak and I/Q mismatch) calibration can be implemented in a transmitter unit in a wireless device. DC signals can be superposed onto digital complex tone signals to generate calibration signals for joint transmit error calibration. The calibration signals may also be phase shifted and/or pre-distorted with digital I/Q phase to yield distinct calibration measurements that can be used for joint transmit error calibration. Digital scaling can be applied at the transmitter unit in accordance with a transmitter gain setting to maintain a constant receiver gain setting. At a receiver unit of the wireless device, the DC signals can be separated from the digital complex tone signals for transmit error calibration. Such a joint transmit error calibration can minimize calibration time, reduce the number of computations required for transmit error calibration, improve the accuracy of the transmit error calibration, and improve performance of the wireless device.
摘要翻译：可以在无线设备中的发射机单元中实现联合发射错误（即，载波泄漏和I / Q不匹配）校准。 DC信号可以叠加到数字复音信号上，以产生用于联合发送错误校准的校准信号。校准信号也可以用数字I / Q相相移和/或预失真，以产生可用于联合发射误差校准的不同校准测量。可以根据发射机增益设置在发射机单元处应用数字缩放以保持恒定的接收机增益设置。在无线设备的接收机单元处，DC信号可以与数字复音信号分开，用于发送错误校准。这种联合发射误差校准可以最小化校准时间，减少发射误差校准所需的计算次数，提高发射误差校准的精度，并提高无线设备的性能。

45. 发明授权

US08638260B2 Transmitter beamforming steering matrix processing and storage 失效
标题翻译：发射机波束成形导向矩阵处理和存储
公开(公告)号：US08638260B2
公开(公告)日：2014-01-28
申请号：US13560818
申请日：2012-07-27
申请人： Chi-Lin Su , Bemini Hennadige Janath Peiris , Ning Zhang
发明人： Chi-Lin Su , Bemini Hennadige Janath Peiris , Ning Zhang
IPC分类号： H01Q3/00
CPC分类号： H04B7/0617 , H01Q3/2605 , H04B7/043
摘要： A mechanism for processing beamforming steering matrices in a transceiver system. A plurality of beamforming steering matrices associated with a plurality of subcarriers of an RF signal received at the transceiver system are generated. The beamforming steering matrices are compressed and stored. The beamforming steering matrices may also be grouped or sub-sampled prior to being stored. The beamforming steering matrices are decompressed and ungrouped before being applied to data to be transmitted. Prior to ungrouping the beamforming steering matrices, a phase difference between corresponding beamforming steering vectors of consecutive beamforming steering matrices is determined. Phase rotation is performed on the corresponding beamforming steering vectors based on the determined phase difference associated with the corresponding beamforming steering vectors to improve phase continuity between consecutive beamforming steering matrices.
摘要翻译：一种在收发机系统中处理波束成形导向矩阵的机制。产生与在收发器系统处接收的RF信号的多个子载波相关联的多个波束成形导引矩阵。波束形成导向矩阵被压缩和存储。在存储之前，波束形成导引矩阵也可以被分组或子采样。波束成形导向矩阵在被应用于要发送的数据之前被解压缩和未分组。在取消分组波束成形导引矩阵之前，确定连续波束形成导引矩阵的相应波束成形导向矢量之间的相位差。基于与相应的波束形成导向矢量相关联的所确定的相位差，对相应的波束成形导向矢量执行相位旋转，以改善连续波束形成导引矩阵之间的相位连续性。

46. 外观设计

USD693291S1 Electronic reader 有权
公开(公告)号：USD693291S1
公开(公告)日：2013-11-12
申请号：US29386620
申请日：2011-03-03
申请人： Kuan-Hong Hsieh , Po-Fu Cheng , Chiang-Kuo Tang , Li-Zhang Huang , Ning Zhang
设计人： Kuan-Hong Hsieh , Po-Fu Cheng , Chiang-Kuo Tang , Li-Zhang Huang , Ning Zhang

47. 发明授权

US08553605B2 Packet identification for power saving in wireless communication networks 有权
标题翻译：无线通信网络中节能的分组识别
公开(公告)号：US08553605B2
公开(公告)日：2013-10-08
申请号：US12957077
申请日：2010-11-30
申请人： James S. Cho , Youhan Kim , Ning Zhang , Shiwei Zhao
发明人： James S. Cho , Youhan Kim , Ning Zhang , Shiwei Zhao
IPC分类号： H04H20/71
CPC分类号： H04W52/0206 , H04W8/186 , H04W52/0229 , H04W60/00 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/162 , Y02D70/22
摘要： A network coordinator can assign an association identifier (AID) and/or a group identifier (GID) to identify a client station to which a packet is to be transmitted and to enable the client station to determine whether to receive an incoming packet. The network coordinator can randomly generate a base AID that is representative of the network coordinator and can assign at least one AID to client stations to minimize the probability of client stations associated with proximate network coordinators being assigned the same AIDs. The network coordinator can also randomly assign at least one GID to a group of client stations to minimize the probability of groups of client stations associated with the proximate network coordinators being assigned the same GID. The client station can analyze indications of a received AID and/or received GID to determine whether to receive the packet or whether to switch to an inactive power state.
摘要翻译：网络协调器可以分配关联标识符（AID）和/或组标识符（GID）来标识要向其发送分组的客户端站，并使客户端站能够确定是否接收输入分组。网络协调器可以随机生成代表网络协调器的基本AID，并且可以向客户站分配至少一个AID以最小化与被分配相同AID的邻近网络协调器相关联的客户站的概率。网络协调器还可以随机地向一组客户端站分配至少一个GID，以最小化与被分配相同GID的邻近网络协调器相关联的客户端站组的概率。客户端站可以分析所接收的AID和/或接收到的GID的指示，以确定是接收分组还是切换到无效功率状态。

48. 发明授权

US08457655B2 Hybrid time of arrival based positioning system 有权
标题翻译：混合时间到达定位系统
公开(公告)号：US08457655B2
公开(公告)日：2013-06-04
申请号：US13236232
申请日：2011-09-19
申请人： Xiaoxin Zhang , Ning Zhang
发明人： Xiaoxin Zhang , Ning Zhang
IPC分类号： H04W24/00
CPC分类号： G01S5/021 , G01S5/0268 , G01S5/0289 , G01S5/14
摘要： A hybrid TOA positioning system can be implemented to improve location estimation of a wireless network device. An initial location of the wireless network device can be calculated based on locations of a plurality of reference network devices. A first intermediate location of the wireless network device and an intermediate distance calibration constant can be determined based, at least in part, on the initial location of the wireless network device and distance between the wireless network device and each of the reference network devices. A second intermediate location of the wireless network device and a target distance calibration constant can be calculated based on the locations of the reference network devices, the first intermediate location, and/or the intermediate distance calibration constant. The location of the wireless network device can be iteratively estimated based, at least in part, on the second intermediate location and the target distance calibration constant.
摘要翻译：可以实现混合TOA定位系统以改善无线网络设备的位置估计。可以基于多个参考网络设备的位置来计算无线网络设备的初始位置。可以至少部分地基于无线网络设备的初始位置以及无线网络设备与每个参考网络设备之间的距离来确定无线网络设备的第一中间位置和中间距离校准常数。可以基于参考网络设备的位置，第一中间位置和/或中间距离校准常数来计算无线网络设备的第二中间位置和目标距离校准常数。可以至少部分地基于第二中间位置和目标距离校准常数来迭代地估计无线网络设备的位置。

49. 发明申请

US20130100850A1 TIME OF ARRIVAL BASED POSITIONING FOR WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：基于无线通信系统的基于时间的定位时间
公开(公告)号：US20130100850A1
公开(公告)日：2013-04-25
申请号：US13278642
申请日：2011-10-21
申请人： Xiaoxin Zhang , Ning Zhang
发明人： Xiaoxin Zhang , Ning Zhang
IPC分类号： H04W24/00 , H04W84/12
CPC分类号： G01S5/0205 , G01S5/14 , G01S13/878
摘要： A TOA positioning system can be implemented to improve location estimation of a wireless network device. A first subset of a plurality of reference wireless network devices for determining potential locations of the wireless network device and a second subset of the plurality of reference wireless network devices for determining an estimated location of the wireless network device can be selected. The first and the second subsets can be selected based on a plurality of distance measurements and an average distance and associated with each of the plurality of reference wireless network devices. The potential locations of the wireless network device can be determined based on the first subset of the plurality of reference wireless network devices. The estimated location of the wireless network device can be determined from the potential locations of the wireless network device based on the second subset of the plurality of reference wireless network devices.
摘要翻译：可以实现TOA定位系统以改善无线网络设备的位置估计。可以选择用于确定无线网络设备的潜在位置和用于确定无线网络设备的估计位置的多个参考无线网络设备的第二子集的多个参考无线网络设备的第一子集。可以基于多个距离测量和平均距离来选择第一和第二子集，并且与多个参考无线网络设备中的每一个相关联。可以基于多个参考无线网络设备的第一子集来确定无线网络设备的潜在位置。可以基于多个参考无线网络设备的第二子集从无线网络设备的潜在位置来确定无线网络设备的估计位置。

50. 发明申请

US20130072217A1 TIME OF ARRIVAL BASED POSITIONING SYSTEM 有权
标题翻译：基于时间的定位系统
公开(公告)号：US20130072217A1
公开(公告)日：2013-03-21
申请号：US13236172
申请日：2011-09-19
申请人： Xiaoxin Zhang , Ning Zhang
发明人： Xiaoxin Zhang , Ning Zhang
IPC分类号： H04W24/00
CPC分类号： H04W4/02 , G01S5/021 , G01S5/14 , G01S13/876
摘要： A TOA positioning system can be implemented that employs a calculated initial location of a wireless network device. For each of a plurality of reference wireless network devices, a distance between the wireless network device and the reference wireless network device is determined based, at least in part, on a round trip transit time between the wireless network device and the reference wireless network device. An initial location of the wireless network device can be calculated based, at least in part, on a location of each of the plurality of reference wireless network devices. A location of the wireless network device can be estimated based, at least in part, on the calculated initial location, the distance to each of the reference wireless network devices, and an initial distance calibration constant.
摘要翻译：可以实现采用计算的无线网络设备的初始位置的TOA定位系统。对于多个参考无线网络设备中的每一个，无线网络设备和参考无线网络设备之间的距离至少部分地基于无线网络设备和参考无线网络设备之间的往返传送时间来确定。可以至少部分地基于多个参考无线网络设备中的每一个的位置来计算无线网络设备的初始位置。可以至少部分地基于所计算的初始位置，到每个参考无线网络设备的距离以及初始距离校准常数来估计无线网络设备的位置。

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