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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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12.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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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：US20130294491A1
公开(公告)日：2013-11-07
申请号：US13867645
申请日：2013-04-22
IPC分类号： H04B7/08
CPC分类号： H04B7/0897 , H04B1/7075 , H04B7/0617 , H04B7/086 , Y02D70/1242 , Y02D70/1262 , Y02D70/40 , Y02D70/444
摘要： Techniques for controlling diversity beamforming antenna array is disclosed. One aspect of the techniques is to utilize low-power and low area circuits to achieve combining gains, mitigate the effects of multipath fading, provide spatial suppression and diversity gains to a single input receiver. The device is radiofrequency transparent yet provides antenna gain by selective three G and four G code acquisition and tracking of a desired downlink channel.
摘要翻译： 公开了用于控制分集波束成形天线阵列的技术。 该技术的一个方面是利用低功率和低面积电路来实现组合增益，减轻多径衰落的影响，向单个输入接收机提供空间抑制和分集增益。 该设备是射频透明的，并通过选择性的三G和四G码获取和跟踪期望的下行链路信道来提供天线增益。
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公开(公告)号：US07123876B2
公开(公告)日：2006-10-17
申请号：US10016233
申请日：2001-11-01
申请人： James June-Ming Wang , ChauChin Yang , Wen Yen Lin
发明人： James June-Ming Wang , ChauChin Yang , Wen Yen Lin
IPC分类号： H04B7/14
CPC分类号： H01Q19/175 , H01Q1/3275 , H01Q3/08 , H01Q13/10
摘要： A low profile, vehicle mounted, in-motion tracking, satellite antenna includes a pair of antenna assemblies mounted in parallel on a rotatable platform. Each antenna assembly includes two subreflectors with a plastic matching element. The outputs of the two antenna assemblies are coupled with a single phase shifter. The combined outputs are retransmitted to a receiver inside the vehicle. The satellite antenna also includes a receiver for receiving channel selection data and/or for providing two-way communication with equipment inside the vehicle. The antennae, transmitter and receiver are self-powered by a storage device which is charged by a wind driven generator. A retractable radome lowers to a lower profile when the antenna is not in use.
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16.发明申请Methods for Determining a Loading of a Wireless Communications System and Communication Apparatuses Utilizing the Same 有权用于确定无线通信系统的负载的方法和使用该无线通信系统的通信设备公开(公告)号：US20130201861A1
公开(公告)日：2013-08-08
申请号：US13877970
申请日：2011-12-28
IPC分类号： H04W24/08
摘要： A method for determining a loading of a wideband communications channel in a wireless communications system includes: setting up a loading table for the wideband communications channel comprising a plurality of narrow band communications channels; obtaining channel characteristics of the plurality of narrow band communications channels; deciding on a number of data streams and a practical bandwidth of the wideband communications channel for a data transmission transaction and selecting one or more peer communications devices for receiving the data streams; completing the data transmission transaction with the one or more peer communications devices; updating the loading table with the information about the practical bandwidth of the wideband communications channel, the number of data streams and duration of the data transmission transaction; and computing the loading by using the information in the loading table in accordance with a pre-determined formula.
摘要翻译： 一种用于确定无线通信系统中的宽带通信信道的负载的方法包括：为包括多个窄带通信信道的宽带通信信道建立加载表; 获得所述多个窄带通信信道的信道特性; 确定用于数据传输事务的多个数据流和宽带通信信道的实际带宽，并选择用于接收数据流的一个或多个对等通信设备; 完成与一个或多个对等通信设备的数据传输事务; 使用关于宽带通信信道的实际带宽的信息，数据流的数量和数据传输事务的持续时间来更新加载表; 以及根据预定公式通过使用装载表中的信息来计算加载。
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17.发明授权Method and system for weight generation in an adaptive array with spread spectrum 有权具有扩展频谱的自适应阵列中权重产生的方法和系统公开(公告)号：US07702000B1
公开(公告)日：2010-04-20
申请号：US11352187
申请日：2006-02-10
申请人： James June-Ming Wang , Jack Winters
发明人： James June-Ming Wang , Jack Winters
IPC分类号： H04B1/00
CPC分类号： H04B7/0848 , H04B1/707
摘要： The present invention comprises a method and system for weight generation in an adaptive array with spread spectrum signals. Signals received by each antenna are amplified, weighted and summed. Complex weighting is achieved by splitting the signal into inphase and quadrature components, and adjusting the gain of each of these components before combining these weighted components. The output signal after combining of the weighted signals from each antenna is downconverted to baseband, creating inphase and quadrature baseband components. The baseband components are multiplied by the spread spectrum sequence to despread the output signal and reduce the bandwidth of the desired spread spectrum signal to the original desired signal bandwidth. The signals received by each antenna are also downconverted to baseband inphase and quadrature components. Each of these components is multiplied by the spread spectrum sequence to despread the output signal and reduce the bandwidth of the desired spread spectrum signal to the original desired signal bandwidth. The despread/filtered individual antenna signals are multiplied by the despread/filtered output signal to generate antenna weights.
摘要翻译： 本发明包括一种具有扩频信号的自适应阵列中权重产生的方法和系统。 由每个天线接收的信号被放大，加权和求和。 通过将信号分成同相和正交分量来实现复加权，并且在组合这些加权分量之前调整这些分量中的每一个的增益。 将来自每个天线的加权信号组合后的输出信号下变频到基带，产生同相和正交基带分量。 将基带分量乘以扩频序列以对输出信号进行解扩，并将期望的扩频信号的带宽减小到原始期望的信号带宽。 由每个天线接收的信号也被下变频到基带同相和正交分量。 将这些分量中的每一个乘以扩展频谱序列以对输出信号进行解扩，并将期望的扩展频谱信号的带宽减小到原始期望的信号带宽。 解扩/滤波的单独天线信号乘以解扩/滤波输出信号以产生天线权重。
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18.发明授权Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques 失效使用具有自适应加权和组合技术的多个天线元件的无线通信系统公开(公告)号：US07260370B2
公开(公告)日：2007-08-21
申请号：US10732003
申请日：2003-12-10
IPC分类号： H04B17/02
CPC分类号： H04B7/086 , H04B7/0857 , H04B7/10 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/442 , Y02D70/444
摘要： The present invention provides a method and system for operating a wireless communication system in which received signals from a plurality of antennas are weighted and combined with a beam forming operation to form an output signal. The beam forming operation determines weights adjusted to increase a desired signal power in the output signal while reducing the power in the output signal of out-of-band components. In an embodiment of the present invention, beam forming operations are performed with maximal ratio combining (MRC). Alternatively, a constant modulus algorithm (CMA) can be used for beam forming operations. In an alternate embodiment, improved interference suppression is performed with a novel algorithm referred to as an interference nulling algorithm (INA). The INA receives an error signal which is 180° out of phase with a combination of the channels for individual antennas, referred to as the SUM channel. The error signal is determined by complex conjugate multiplication of the individual signals and a reference complex signal. It is desirable to simultaneously achieve diversity and combining gain and suppress the adjacent channel by combining the weight generation for MRC and that for INA, as described above, to generate antenna weights similar to those of MMSE combining.
摘要翻译： 本发明提供了一种用于操作无线通信系统的方法和系统，其中来自多个天线的接收信号被加权并与波束形成操作组合以形成输出信号。 波束形成操作确定了为减小输出信号中的带外分量的功率而在输出信号中增加所需信号功率而调整的权重。 在本发明的实施例中，以最大比组合（MRC）进行波束形成操作。 或者，恒模算法（CMA）可用于波束形成操作。 在替代实施例中，使用被称为干扰归零算法（INA）的新颖算法来执行改进的干扰抑制。 INA接收与被称为SUM信道的各个天线的信道的组合相差180°的误差信号。 误差信号由各个信号和参考复信号的复共轭乘法确定。 期望同时实现分集和组合增益并通过组合用于MRC的权重生成和针对INA的权重生成来抑制相邻信道，如上所述，以生成与MMSE组合类似的天线权重。
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公开(公告)号：US07257425B2
公开(公告)日：2007-08-14
申请号：US11001911
申请日：2004-12-02
IPC分类号： H04M1/00
CPC分类号： H04B7/0848 , H04B7/0615
摘要： A smart external antenna module is proposed for wireless systems. The module allows the advantages of smart antennas to be easily added to existing wireless systems without any modification to the transceiver. Specifically, the smart antenna module weights and combines the signals received by multiple antennas to improve the received signal quality, and then when it detects that there is a signal to be transmitted by the transceiver, it turns off the receiver, turns on the transmitter and uses the receive weights to transmit the signal out of the multiple antennas to improve signal reception at the desired user. Such a module can be added to the external antenna port of an existing transceiver with no change to that transceiver.
摘要翻译： 为无线系统提出了一种智能外部天线模块。 该模块允许将智能天线的优点轻松添加到现有的无线系统中，而无需对收发器进行任何修改。 具体地说，智能天线模块对由多个天线接收到的信号进行权重并组合以提高接收信号质量，然后当它检测到有收发信机要发送的信号时，它关闭接收机，打开发射机， 使用接收权重从多个天线发送信号以改善在期望用户处的信号接收。 这样的模块可以添加到现有收发器的外部天线端口，而不改变该收发器。
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公开(公告)号：US07227508B2
公开(公告)日：2007-06-05
申请号：US10752797
申请日：2004-01-07
CPC分类号： H01Q1/3275 , H01Q1/288 , H01Q21/005 , H01Q21/24
摘要： The present invention relates to a vehicle mountable satellite antenna as defined in the claims which is operable while the vehicle is in motion. The satellite antenna of the present invention can be installed on top of (or embedded into) the roof of a vehicle. The antenna is capable of providing high gain and a narrow antenna beam for aiming at a satellite direction and enabling broadband communication to vehicle. The present invention provides a vehicle mounted satellite antenna which has low axial ratio, high efficiency and has low grating lobes gain. The vehicle mounted satellite antenna of the present invention provides two simultaneous polarization states.
摘要翻译： 本发明涉及一种如权利要求书所限定的可车载卫星天线，其可在车辆运动时操作。 本发明的卫星天线可以安装在车辆顶部（或嵌入）车顶。 天线能够提供高增益和窄天线波束，用于瞄准卫星方向并实现与车辆的宽带通信。 本发明提供一种具有低轴比，高效率并且具有低的光栅增益的车载卫星天线。 本发明的车载卫星天线提供两个同时的偏振状态。
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