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公开(公告)号：US09258070B2
公开(公告)日：2016-02-09
申请号：US13635341
申请日：2011-10-20
IPC分类号： H04W4/00 , H04B17/309 , H04B17/24
CPC分类号： H04B17/309 , H04B17/24
摘要： A method of simultaneously providing channel quality feedback information in all valid sub-channels is provided to facilitate and improve the performance of dynamic transmission bandwidth adjustment and fast link adaptation. A receiving device receives a sounding signal over a wide channel in a wireless system. The sounding signal is transmitted from a transmitting device over multiple sub-channels of the wide channel. The receiving device estimates channel quality information based on the sounding signal for each sub-channel. The channel quality information includes estimated average SNR and recommended MCS and other channel quality metrics. The receiving device transmits a feedback message to the transmitting device. The feedback message contains the estimated channel quality information for all valid sub-channels within the transmission bandwidth. The transmitting device performs dynamic transmission bandwidth selection and fast link adaptation based on the channel quality information for all valid sub-channels.
摘要翻译： 提供了一种在所有有效子信道中同时提供信道质量反馈信息的方法，以促进和改进动态传输带宽调整和快速链路自适应的性能。 接收设备在无线系统中通过宽频道接收探测信号。 探测信号通过宽信道的多个子信道从发送设备发送。 接收装置基于每个子信道的探测信号来估计信道质量信息。 信道质量信息包括估计的平均SNR和推荐的MCS等信道质量度量。 接收装置向发送装置发送反馈消息。 反馈消息包含传输带宽内所有有效子信道的估计信道质量信息。 发送设备根据所有有效子信道的信道质量信息，执行动态传输带宽选择和快速链路自适应。
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公开(公告)号：US08804559B2
公开(公告)日：2014-08-12
申请号：US13373305
申请日：2011-11-10
CPC分类号： H04W24/00 , H04L1/0026 , H04L1/06 , H04L25/0208 , H04L43/50
摘要： A method of monitoring channel-sounding quality for VHT WiFi devices is provided. A mobile station (the receiver) receives a sounding signal transmitted from an access point (the transmitter) over one or multiple sub-channels of a wide channel in a wireless network. The receiver performs channel estimation and determines an estimated channel response matrix. The receiver then calculates sounding quality for each valid sub-channel by computing an estimation error of the received sounding signal based on the estimated channel matrix. The receiver transmits a feedback message to the transmitter. The feedback message contains sounding quality information derived from the calculated channel sounding quality. If the channel sounding qualities for all valid sub-channels are poor, then a null VHT channel feedback frame is sent back to the transmitter.
摘要翻译： 提供了一种监测VHT WiFi设备的通道音质的方法。 移动站（接收机）通过无线网络中的宽信道的一个或多个子信道接收从接入点（发射机）发送的探测信号。 接收机执行信道估计并确定估计的信道响应矩阵。 然后，接收机通过基于估计的信道矩阵计算接收到的探测信号的估计误差来计算每个有效子信道的探测质量。 接收机向发射机发送反馈消息。 反馈消息包含从计算的声道探测质量得到的探测质量信息。 如果所有有效子信道的信道探测质量差，则将零VHT信道反馈帧发送回发射机。
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3.发明申请Methods for selecting modules for a wireless communication device to achieve optimal performance 有权为无线通信设备选择模块以实现最佳性能的方法公开(公告)号：US20130242834A1
公开(公告)日：2013-09-19
申请号：US13848198
申请日：2013-03-21
IPC分类号： H04W72/02
CPC分类号： H04W72/02 , H04B7/0608 , H04B7/0817 , H04B7/0854 , H04B7/0857 , H04B7/0874 , H04W24/02 , H04W52/0229 , H04W72/046 , H04W84/12 , Y02D70/142 , Y02D70/144 , Y02D70/444
摘要： The present invention relates to a method and system for adapting a wireless communication system to support a desired functionality of the wireless communication system at an optimized performance and economic benefit. The desired functionality can be determined by defined criteria such as a maximum range of communication with the wireless communication system, quality of a transmission link in the wireless communication system, capacity of the wireless communication system, power consumption of the wireless communication system, protocols supported in the wireless communication system, modulation techniques used in the wireless communication system and processing techniques for combining signals in the wireless communication system. The system can be adapted by varying one or more of the number of components or processing techniques used in the wireless communication system.
摘要翻译： 本发明涉及一种用于使无线通信系统适应无线通信系统的期望功能的方法和系统，其具有优化的性能和经济效益。 期望的功能可以通过诸如与无线通信系统的最大通信范围，无线通信系统中的传输链路的质量，无线通信系统的容量，无线通信系统的功耗，支持的协议 在无线通信系统中，在无线通信系统中使用的调制技术和用于组合无线通信系统中的信号的处理技术。 可以通过改变在无线通信系统中使用的多个组件或处理技术中的一个或多个来适配系统。
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4.发明申请Method and System for Supporting Incompatible Channelization of a Wireless Communications System 有权支持无线通信系统不兼容信道化的方法和系统公开(公告)号：US20130195029A1
公开(公告)日：2013-08-01
申请号：US13635333
申请日：2011-10-18
申请人： Chao-Chun Wang , Jianhan Liu , Chih-Shi Yee , Huanchun Ye , James June-Ming Wang
发明人： Chao-Chun Wang , Jianhan Liu , Chih-Shi Yee , Huanchun Ye , James June-Ming Wang
IPC分类号： H04W76/04
摘要： A method of supporting incompatible channelization in a wireless communications system is provided. A coordinating device determines a first set of physical parameters of a first wireless channel. The first set of physical parameters includes a channel bandwidth, a central frequency, a transmit power limit, and a modulation and coding scheme. The coordinating device establishes communication with a first set of communications devices over the first wireless channel. The coordinating device then broadcasts a channel-adjustment message and determines a protection period. The channel-adjustment message comprises a set of instructions on how to adjust to a second set of physical parameters of a second wireless channel. A second set of communications devices adjust physical parameters based on the channel-adjustment message. Finally, the coordinating device communicates with the second set of communications devices over the second wireless channel during the protection period.
摘要翻译： 提供了一种在无线通信系统中支持不兼容信道化的方法。 协调装置确定第一无线信道的第一组物理参数。 第一组物理参数包括信道带宽，中心频率，发射功率限制以及调制和编码方案。 协调设备通过第一无线信道与第一组通信设备建立通信。 协调装置然后广播信道调整消息并确定保护期。 信道调整消息包括关于如何调整到第二无线信道的第二组物理参数的一组指令。 第二组通信设备根据信道调整消息调整物理参数。 最后，协调装置在保护期间通过第二无线信道与第二组通信装置进行通信。
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5.发明申请Method and system for an adaptive wireless communication system optimized for economic benefit 有权针对经济效益优化的自适应无线通信系统的方法和系统公开(公告)号：US20120329465A1
公开(公告)日：2012-12-27
申请号：US13607104
申请日：2012-09-07
IPC分类号： H04W16/18
CPC分类号： H04W72/02 , H04B7/0608 , H04B7/0817 , H04B7/0854 , H04B7/0857 , H04B7/0874 , H04W24/02 , H04W52/0229 , H04W72/046 , H04W84/12 , Y02D70/142 , Y02D70/144 , Y02D70/444
摘要： Techniques for adapting a wireless communication device or system to support a desired functionality of the wireless communication system at an optimized performance and economic benefit are discussed. The desired functionality can be determined by defined criteria such as a maximum range of communication with the wireless communication system, quality of a transmission link in the wireless communication system, capacity of the wireless communication system, power consumption of the wireless communication system, protocols supported in the wireless communication system, modulation techniques used in the wireless communication system and processing techniques for combining signals in the wireless communication system. The system can be adapted by varying one or more of modules (e.g., components or processing techniques) used in the wireless communication system.
摘要翻译： 讨论了以优化的性能和经济效益来适配无线通信设备或系统以支持无线通信系统的期望功能的技术。 期望的功能可以通过诸如与无线通信系统的最大通信范围，无线通信系统中的传输链路的质量，无线通信系统的容量，无线通信系统的功耗，支持的协议 在无线通信系统中，在无线通信系统中使用的调制技术和用于组合无线通信系统中的信号的处理技术。 可以通过改变在无线通信系统中使用的模块（例如，组件或处理技术）中的一个或多个来适配系统。
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公开(公告)号：US20120120839A1
公开(公告)日：2012-05-17
申请号：US13373305
申请日：2011-11-10
IPC分类号： H04W24/00
CPC分类号： H04W24/00 , H04L1/0026 , H04L1/06 , H04L25/0208 , H04L43/50
摘要： A method of monitoring channel-sounding quality for VHT WiFi devices is provided. A mobile station (the receiver) receives a sounding signal transmitted from an access point (the transmitter) over one or multiple sub-channels of a wide channel in a wireless network. The receiver performs channel estimation and determines an estimated channel response matrix. The receiver then calculates sounding quality for each valid sub-channel by computing an estimation error of the received sounding signal based on the estimated channel matrix. The receiver transmits a feedback message to the transmitter. The feedback message contains sounding quality information derived from the calculated channel sounding quality. If the channel sounding qualities for all valid sub-channels are poor, then a null VHT channel feedback frame is sent back to the transmitter.
摘要翻译： 提供了一种监测VHT WiFi设备的通道音质的方法。 移动站（接收机）通过无线网络中的宽信道的一个或多个子信道接收从接入点（发射机）发送的探测信号。 接收机执行信道估计并确定估计的信道响应矩阵。 然后，接收机通过基于估计的信道矩阵计算接收到的探测信号的估计误差来计算每个有效子信道的探测质量。 接收机向发射机发送反馈消息。 反馈消息包含从计算的声道探测质量得到的探测质量信息。 如果所有有效子信道的信道探测质量差，则将零VHT信道反馈帧发送回发射机。
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公开(公告)号：US07212116B2
公开(公告)日：2007-05-01
申请号：US11009098
申请日：2004-12-10
IPC分类号： G08B13/14
CPC分类号： H01Q1/2208 , G06K7/10356 , H01Q3/2605 , H04B7/0848 , H04B7/0857
摘要： The present invention relates to use of a smart antenna for a RF reader on a Radio Frequency Identification (RFID) system to significantly increase the operating range of the RFID system. The smart antenna can be an adaptive antenna array. The smart antenna comprises a plurality of antenna elements and, by combining the signals from multiple antenna elements, significantly increases the received signal-to-noise ratio. In a noise limited environment, combining the signals to maximize the received signal-to-noise ratio can be based on the maximal ratio combining (MRC) principle. To achieve the best signal quality, the received signal from each antenna can be phase-shifted such that the resultant signals from all antennas are in phase. In addition, the signal from each antenna can be scaled in amplitude based on the square root of its received signal-to-noise ratio.
摘要翻译： 本发明涉及在射频识别（RFID）系统上用于RF读取器的智能天线，以显着增加RFID系统的操作范围。 智能天线可以是自适应天线阵列。 智能天线包括多个天线元件，并且通过组合来自多个天线元件的信号，显着增加了接收到的信噪比。 在噪声限制环境中，组合信号以使接收的信噪比最大化可以基于最大比组合（MRC）原理。 为了实现最佳的信号质量，来自每个天线的接收信号可以进行相移，使得来自所有天线的合成信号同相。 另外，来自每个天线的信号可以根据其接收的信噪比的平方根进行幅度缩放。
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8.发明授权公开(公告)号：US06784831B1
公开(公告)日：2004-08-31
申请号：US10429492
申请日：2003-05-05
IPC分类号： G01S502
CPC分类号： G01S19/21 , G01S19/22 , G01S19/36 , H01Q21/065
摘要： An improved GPS signal receiver (and corresponding method of operation) includes a plurality of antenna elements each receiving a plurality of GPS signals (e.g., GPS LI signals or GPS L2 signals). A plurality of mixers (which correspond to the array of antenna elements) and a combining node convert the GPS signals received at the antenna elements in a frequency-division-multiplexed (FDM) manner over FDM frequency bands logically assigned to the antenna elements to produce a composite signal representing such GPS signals. An analog-to-digital converter converts an analog signal derived from the composite signal (which may be an intermediate frequency signal or a baseband signal) into a digital word stream. Demultiplexing logic extracts GPS signal components in the digital word stream. The GPS signal components correspond to the FDM frequency bands logically assigned to the antenna elements. Beam forming logic, operably coupled to the demultiplexing logic, applies variable phase delay and variable gain to each GPS component in accordance with a set of weight values supplied thereto. Preferably, the beam forming logic is controlled to perform adaptive beam steering/nulling operations that provide for interference cancellation, multipath rejection and improved signal reception.
摘要翻译： 改进的GPS信号接收机（及相应的操作方法）包括多个天线元件，每个天线元件接收多个GPS信号（例如，GPS L1信号或GPS L2信号）。 多个混合器（其对应于天线元件阵列）和组合节点通过在逻辑上分配给天线元件的FDM频带上以频分复用（FDM）方式在天线元件处接收的GPS信号转换以产生 表示这种GPS信号的复合信号。 模拟 - 数字转换器将从复合信号（其可以是中频信号或基带信号）导出的模拟信号转换为数字字流。 解复用逻辑提取数字字流中的GPS信号分量。 GPS信号分量对应于逻辑地分配给天线元件的FDM频带。 可操作地耦合到解复用逻辑的光束形成逻辑根据提供给其的一组权重值向每个GPS分量施加可变相位延迟和可变增益。 优选地，波束形成逻辑被控制以执行提供干扰消除，多路径抑制和改进的信号接收的自适应波束导向/归零操作。
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公开(公告)号：US20170070893A1
公开(公告)日：2017-03-09
申请号：US15121044
申请日：2015-02-24
申请人： James June-Ming Wang , Jianhan Liu , Thomas Edward Pare, JR. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu , MEDIATEK INC.
发明人： James June-Ming Wang , Jianhan Liu , Thomas Edward Pare Jr. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu
CPC分类号： H04W16/225 , G01S3/14 , G01S3/74 , G01S5/0252 , G01S5/06 , G01S5/12 , G01S13/825 , H04B7/0617 , H04B17/318 , H04L5/0048 , H04L5/005 , H04L69/22 , H04W4/02 , H04W4/023 , H04W4/043 , H04W24/10 , H04W64/00 , H04W84/12
摘要： A method of direction finding (DF) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas simultaneously, which allows a receiving device to resolve multiple DF sounding signals transmitted from the multiple antennas. As a result, angle of departure (AoD) of the transmitting device can be estimated by using the multiple resolved DF sounding signals from each antenna for DF positioning purpose.
摘要翻译： 提出了一种在无线定位区域网络（WLAN）中的方向搜索（DF）定位的方法。 多天线IEEE 802.11发射设备可以同时在多个天线的无线帧中发送包含多个长训练场（LTF）符号的信号前导码，这允许接收设备解析从多个天线发送的多个DF探测信号。 结果，可以通过使用来自每个天线的多个分辨的DF探测信号来估计发射装置的出发角（AoD），用于DF定位目的。
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10.发明授权Methods for inter-user interference indication feedback and usage in MU-MIMO wireless systems 有权MU-MIMO无线系统中用户间干扰指示反馈和使用的方法公开(公告)号：US08902921B2
公开(公告)日：2014-12-02
申请号：US13587902
申请日：2012-08-16
申请人： Jianhan Liu , James June-Ming Wang , YungPing Hsu
发明人： Jianhan Liu , James June-Ming Wang , YungPing Hsu
CPC分类号： H04B7/0452 , H04L25/0204 , H04L25/0224
摘要： The present invention proposes methods for facilitating and improving the performance of MU-MIMO transmission in wireless communication systems. Each user within a MU group inserts an inter-user interference indication field in its acknowledgement packet. The inter-user interference indication field includes signal-to-interference-noise-ratio (SINR) and interference source information. The MU-MIMO transmitter extracts inter-user interference indication feedback and improves subsequent MU-MIMO transmission. Feedback of the inter-user interference information such as SINR and interference source allows efficient link adaptation, smarter user selection, channel re-sounding selection, and fine-tuning of precoding matrix.
摘要翻译： 本发明提出了促进和改进无线通信系统中MU-MIMO传输性能的方法。 MU组内的每个用户在其确认分组中插入用户间干扰指示字段。 用户间干扰指示字段包括信号与干扰噪声比（SINR）和干扰源信息。 MU-MIMO发射机提取用户间干扰指示反馈并改进随后的MU-MIMO传输。 诸如SINR和干扰源之类的用户间干扰信息的反馈允许有效的链路自适应，更智能的用户选择，信道重新选择以及预编码矩阵的微调。
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