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21.发明授权System and methods to compensate for Doppler effects in multi-user (MU) multiple antenna systems (MAS) 有权用于补偿多用户（MU）多天线系统（MAS）中多普勒效应的系统和方法公开(公告)号：US09312929B2
公开(公告)日：2016-04-12
申请号：US13464648
申请日：2012-05-04
CPC分类号： H04W72/048 , H04B7/01 , H04B7/024 , H04B7/0452 , H04B7/0617 , H04B7/0626 , H04B7/10 , H04W28/0236 , H04W72/082 , H04W72/121 , H04W88/085
摘要： A system and methods are described which compensate for the adverse effect of Doppler on the performance of DIDO systems. One embodiment of such a system employs different selection algorithms to adaptively adjust the active BTSs to different UEs based by tracking the changing channel conditions. Another embodiment utilizes channel prediction to estimate the future CSI or DIDO precoding weights, thereby eliminating errors due to outdated CSI.
摘要翻译： 描述了补偿多普勒对DIDO系统的性能的不利影响的系统和方法。 这种系统的一个实施例采用不同的选择算法，通过跟踪不断变化的信道条件来自适应地将活动BTS调整到不同的UE。 另一个实施例利用信道预测来估计将来的CSI或DIDO预编码权重，从而消除由于过时的CSI引起的错误。
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公开(公告)号：US20140133435A1
公开(公告)日：2014-05-15
申请号：US14156254
申请日：2014-01-15
CPC分类号： H04B7/0626 , H04B7/022 , H04B7/0452 , H04B7/0634 , H04B7/0684 , H04B7/10 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/007 , H04L5/0023 , H04L25/0206 , H04L25/0224 , H04L25/03343 , H04L25/03949 , H04L2025/03414 , H04L2025/0377 , H04L2025/03802 , H04W24/02
摘要： A system and method are described for distributed antenna wireless communications. For example, a method implemented within a wireless transmission system comprised of a plurality of wireless client devices and a plurality of distributed antennas is described comprising: computing channel state information (CSI) for wireless communication channels between the plurality of base distributed antennas and the wireless client devices; computing precoding weights from the channel state information; precoding data using the precoding weights prior to wireless transmission from the plurality of distributed antennas to the wireless client devices; and wirelessly transmitting the precoded data from the distributed antennas to each of the wireless client devices, wherein the precoding causes radio frequency interference between the plurality of base stations but simultaneously generating a plurality of non-interfering radio frequency user channels between the plurality of distributed antennas and the plurality of wireless client devices.
摘要翻译： 描述了分布式天线无线通信的系统和方法。 例如，描述了在由多个无线客户端设备和多个分布式天线组成的无线传输系统内实现的方法，包括：为多个基本分布式天线与无线的无线通信信道之间的无线通信信道计算信道状态信息（CSI） 客户端设备; 从信道状态信息计算预编码权重; 在从多个分布式天线到无线客户端设备的无线传输之前使用预编码权重预编码数据; 以及将所述预编码数据从所述分布式天线无线发送到所述无线客户端设备，其中，所述预编码引起所述多个基站之间的射频干扰，但是同时在所述多个分布式天线之间生成多个非干扰射频用户信道 和多个无线客户端设备。
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23.发明申请SYSTEMS AND METHODS TO COORDINATE TRANSMISSIONS IN DISTRIBUTED WIRELESS SYSTEMS VIA USER CLUSTERING 有权通过用户集群在分布式无线系统中协调传输的系统和方法公开(公告)号：US20140016499A1
公开(公告)日：2014-01-16
申请号：US14023302
申请日：2013-09-10
IPC分类号： H04W24/02
CPC分类号： H04B7/0456 , H04B7/024 , H04B7/0434 , H04B7/0452 , H04B7/0626 , H04W24/02 , H04W24/08
摘要： Systems and methods are described for coordinating transmissions in distributed wireless systems via user clustering. For example, a method according to one embodiment of the invention comprises: measuring link quality between a target user and a plurality of distributed-input distributed-output (DIDO) distributed antennas of base transceiver stations (BTSs); using the link quality measurements to define a user cluster; measuring channel state information (CSI) between each user and each DIDO antenna within a defined user cluster; and precoding data transmissions between each DIDO antenna and each user within the user cluster based on the measured CSI.
摘要翻译： 描述了用于通过用户群集协调分布式无线系统中的传输的系统和方法。 例如，根据本发明的一个实施例的方法包括：测量目标用户与基站收发台（BTS）的多个分布式输入分布式输出（DIDO）分布式天线之间的链路质量; 使用链路质量测量来定义用户群集; 在定义的用户群内测量每个用户与每个DIDO天线之间的信道状态信息（CSI）; 以及基于所测量的CSI，在每个DIDO天线和用户群内的每个用户之间预编码数据传输。
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24.发明申请SYSTEMS AND METHODS FOR WIRELESS BACKHAUL IN DISTRIBUTED-INPUT DISTRIBUTED-OUTPUT WIRELESS SYSTEMS 有权分布式输入分布式无线系统中无线背板的系统与方法公开(公告)号：US20130039168A1
公开(公告)日：2013-02-14
申请号：US13633702
申请日：2012-10-02
CPC分类号： H04B7/022 , H04B7/0452 , H04B7/066
摘要： Systems and methods are described for wireless backhaul in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”). For example, a multiuser (MU) multiple antenna system (MAS) of one embodiment comprises: one or more centralized units communicatively coupled to multiple distributed transceiver stations via a network; the network consisting of wireline or wireless links or a combination of both, employed as a backhaul communication channel; the centralized unit transforming the N streams of information into M streams of bits, each stream of bits being a combination of some or all N streams of information; the M streams of bits being sent over the network to the distributed transceiver stations; the distributed transceiver stations simultaneously sending the streams of bits over wireless links to at least one client device such that at least one client device receives at least one of the original N streams of information.
摘要翻译： 描述了用于具有多用户（MU）传输（MU-MAS）的多天线系统（MAS）中的无线回程的系统和方法。 例如，一个实施例的多用户（MU）多天线系统（MAS）包括：经由网络通信地耦合到多个分布式收发机站的一个或多个集中式单元; 由有线或无线链路组成的网络或两者的组合，用作回程通信信道; 集中单元将N个信息流变换成M个比特流，每个比特流是一些或全部N个信息流的组合; M个比特流通过网络发送到分布式收发台; 所述分布式收发站同时通过无线链路将比特流发送到至少一个客户端设备，使得至少一个客户端设备接收原始N个信息流中的至少一个。
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25.发明授权System and method for distributed input-distributed output wireless communications 有权分布式输入分布式输出无线通信系统和方法公开(公告)号：US08160121B2
公开(公告)日：2012-04-17
申请号：US12143503
申请日：2008-06-20
IPC分类号： H04L27/30
CPC分类号： H04L25/03343 , H04B7/0626 , H04B7/0684 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/007 , H04L25/0206 , H04L25/0224 , H04L2025/03414 , H04L2025/0377 , H04L2025/03802
摘要： A system and method are described for dynamically adapting the communication characteristics of a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”). For example, a method according to one embodiment of the invention comprises: transmitting a training signal from each antenna of a base station to each of a plurality of wireless client devices, each of the client devices analyzing each training signal to generate channel characterization data, and receiving the channel characterization data at the base station; computing a plurality of MU-MAS precoder weights based on the channel characterization data, the combined MU-MAS precoder weights comprising a MU-MAS channel matrix; determining instantaneous or statistical channel quality (“link quality metric”) for the wireless client devices using mutual information of MU-MAS links or singular values of the MU-MAS composite channel matrix; determining a subset of users and a MU-MAS transmission mode based on the link quality metric; precoding data using the MU-MAS precoder weights to generate precoded data signals for each antenna of the base station; and transmitting the precoded data signals through each antenna of the base station to each respective client device within the selected subset.
摘要翻译： 描述了一种用于动态地适应具有多用户（MU）传输（MU-MAS）的多天线系统（MAS）的通信特性的系统和方法。 例如，根据本发明的一个实施例的方法包括：将训练信号从基站的每个天线发送到多个无线客户端设备中的每一个，每个客户机设备分析每个训练信号以产生信道表征数据， 以及在所述基站处接收所述信道表征数据; 基于所述信道特征数据计算多个MU-MAS预编码器权重，所述组合的MU-MAS预编码器权重包括MU-MAS信道矩阵; 使用MU-MAS链路的互信息或MU-MAS复合信道矩阵的奇异值来确定无线客户端设备的即时或统计信道质量（“链路质量度量”）; 基于所述链路质量度量来确定用户的子集和MU-MAS传输模式; 使用MU-MAS预编码器权重预编码数据，以生成基站的每个天线的预编码数据信号; 以及将预编码的数据信号通过基站的每个天线发送到所选择的子集内的每个相应的客户机设备。
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26.发明申请System and method for managing inter-cluster handoff of clients which traverse multiple DIDO clusters 有权用于管理跨越多个DIDO群集的客户端的群集间切换的系统和方法公开(公告)号：US20110003606A1
公开(公告)日：2011-01-06
申请号：US12802974
申请日：2010-06-16
IPC分类号： H04B15/00
CPC分类号： H04W72/085 , H04B7/0417 , H04B17/24 , H04B17/318 , H04B17/345 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0029 , H04L5/0007 , H04L25/0204 , H04L25/03343 , H04L25/03891 , H04L2025/03426
摘要： A system and method are described for adjusting communication with a first distributed-input-distributed-output (DIDO) client as the first DIDO client moves from a first DIDO cluster to a second DIDO cluster: For example, in one embodiment of the system and method, different signal strength thresholds are specified and either conventional DIDO precoding and/or DIDO precoding with inter-DIDO-cluster interference (IDCI) cancellation to avoid RF interference at the DIDO client are employed based on measured signal strengths from a main DIDO cluster and an interfering DIDO cluster.
摘要翻译： 描述了当第一DIDO客户端从第一DIDO群组移动到第二DIDO群集时，描述了用于调整与第一分布式输入分布式输出（DIDO）客户端的通信的系统和方法：例如，在该系统的一个实施例中， 指定不同的信号强度阈值，并且基于来自主DIDO簇的测量信号强度采用具有DIDO簇间干扰（IDCI）消除的常规DIDO预编码和/或DIDO预编码以避免DIDO客户端处的RF干扰， 干扰DIDO群集。
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27.发明申请System and method for powering an aircraft using radio frequency signals and feedback 有权使用射频信号和反馈为飞机供电的系统和方法公开(公告)号：US20100224725A1
公开(公告)日：2010-09-09
申请号：US12291856
申请日：2008-11-14
IPC分类号： B64C39/00
CPC分类号： B60L11/1816 , B60K6/46 , B60L9/00 , B60L11/182 , B60L2200/26 , B60W2510/244 , Y02T10/6217 , Y02T10/6269 , Y02T10/7005 , Y02T10/7072 , Y02T90/122 , Y02T90/14
摘要： A system and method are described for powering an aircraft using radio frequency (“RF”) signals. For example, a method according to one embodiment of the invention comprises: positioning an antenna array beneath or on the road surface of a roadway, the antenna array configured to transmit RF signals responsive to RF processing logic and/or circuitry; coupling a rectenna array to an aircraft, the rectenna array configured to receive the RF signals transmitted from the antenna array and to generate power from the RF signals; providing feedback signals from the aircraft to the RF processing logic and/or circuitry, the feedback signals including channel state information (CSI) defining a current state of the channels between the antenna array and the rectenna array, the RF processing logic and/or circuitry using the channel state information to adjust the RF signal transmissions from the antenna array to improve the efficiency of the power generated by the rectenna array; and using the power generated by the rectenna array to power the aircraft.
摘要翻译： 描述了使用射频（“RF”）信号为飞机供电的系统和方法。 例如，根据本发明的一个实施例的方法包括：将天线阵列定位在道路的路面下或其路面上，所述天线阵列被配置成响应于RF处理逻辑和/或电路传输RF信号; 将天线阵列耦合到飞行器，所述天线阵列被配置为接收从所述天线阵列发送的RF信号并且从所述RF信号产生功率; 提供来自飞行器的反馈信号到RF处理逻辑和/或电路，反馈信号包括定义天线阵列和整流天线阵列之间的通道的当前状态的信道状态信息（CSI），RF处理逻辑和/或电路 使用信道状态信息来调整来自天线阵列的RF信号传输，以提高由天线阵列产生的功率的效率; 并使用由天线阵列产生的电力为飞机提供动力。
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28.发明授权System and method for distributed input-distributed output wireless communications 有权分布式输入分布式输出无线通信系统和方法公开(公告)号：US07633994B2
公开(公告)日：2009-12-15
申请号：US11894362
申请日：2007-08-20
IPC分类号： H04L27/30
CPC分类号： H04L25/03343 , H04B7/0684 , H04L1/0057 , H04L25/0206 , H04L25/0224 , H04L2025/03414 , H04L2025/0377 , H04L2025/03802
摘要： A system for compensating for in-phase and quadrature (I/Q) imbalances for multiple antenna systems (MAS) with multi-user (MU) transmissions (defined with the acronym MU-MAS), such as distributed-input distributed-output (DIDO) communication systems, comprising multicarrier modulation, such as orthogonal frequency division multiplexing (OFDM). For example, one embodiment of the system comprises one or more coding modulation units to encode and modulate information bits for each of a plurality of wireless client devices to produce encoded and modulated information bits; one or more mapping units to map the encoded and modulated information bits to complex symbols; and a MU-MAS or DIDO IQ-aware precoding unit to exploit channel state information obtained through feedback from the wireless client devices to compute MU-MAS or DIDO IQ-aware precoding weights, the MU-MAS or DIDO IQ-aware preceding unit precoding the complex symbols obtained from the mapping units using the weights to pre-cancel interference due to I/Q gain and phase imbalances and/or inter-user interference.
摘要翻译： 用于补偿具有多用户（MU）传输（用首字母缩略词MU-MAS定义）的多天线系统（MAS）的同相和正交（I / Q）不平衡的系统，例如分布式输入分布式输出（ DIDO）通信系统，包括多载波调制，例如正交频分复用（OFDM）。 例如，系统的一个实施例包括一个或多个编码调制单元，以编码和调制多个无线客户端设备中的每一个的信息比特，以产生编码和调制的信息比特; 一个或多个映射单元将编码和调制的信息比特映射到复数符号; 以及MU-MAS或DIDO IQ感知预编码单元，以利用通过来自无线客户端设备的反馈获得的信道状态信息来计算MU-MAS或DIDO IQ感知预编码权重，MU-MAS或DIDO IQ感知前一单元预编码 从映射单元获得的复数符号使用权重来预先消除由于I / Q增益和相位不平衡和/或用户间干扰引起的干扰。
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29.发明申请System and Method For Distributed Input-Distributed Output Wireless Communications 有权分布式输入分布式输出无线通信系统与方法公开(公告)号：US20090067402A1
公开(公告)日：2009-03-12
申请号：US12143503
申请日：2008-06-20
CPC分类号： H04L25/03343 , H04B7/0626 , H04B7/0684 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/007 , H04L25/0206 , H04L25/0224 , H04L2025/03414 , H04L2025/0377 , H04L2025/03802
摘要： A system and method are described for dynamically adapting the communication characteristics of a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”). For example, a method according to one embodiment of the invention comprises: transmitting a training signal from each antenna of a base station to each of a plurality of wireless client devices, each of the client devices analyzing each training signal to generate channel characterization data, and receiving the channel characterization data at the base station; computing a plurality of MU-MAS precoder weights based on the channel characterization data, the combined MU-MAS precoder weights comprising a MU-MAS channel matrix; determining instantaneous or statistical channel quality (“link quality metric”) for the wireless client devices using mutual information of MU-MAS links or singular values of the MU-MAS composite channel matrix; determining a subset of users and a MU-MAS transmission mode based on the link quality metric; precoding data using the MU-MAS precoder weights to generate precoded data signals for each antenna of the base station; and transmitting the precoded data signals through each antenna of the base station to each respective client device within the selected subset.
摘要翻译： 描述了一种用于动态地适应具有多用户（MU）传输（MU-MAS）的多天线系统（MAS）的通信特性的系统和方法。 例如，根据本发明的一个实施例的方法包括：将训练信号从基站的每个天线发送到多个无线客户端设备中的每一个，每个客户机设备分析每个训练信号以产生信道表征数据， 以及在所述基站处接收所述信道表征数据; 基于所述信道特征数据计算多个MU-MAS预编码器权重，所述组合的MU-MAS预编码器权重包括MU-MAS信道矩阵; 使用MU-MAS链路的互信息或MU-MAS复合信道矩阵的奇异值来确定无线客户端设备的即时或统计信道质量（“链路质量度量”）; 基于所述链路质量度量来确定用户的子集和MU-MAS传输模式; 使用MU-MAS预编码器权重预编码数据，以生成基站的每个天线的预编码数据信号; 以及将预编码的数据信号通过基站的每个天线发送到所选择的子集内的每个相应的客户机设备。
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30.发明授权公开(公告)号：US09685997B2
公开(公告)日：2017-06-20
申请号：US13475598
申请日：2012-05-18
申请人： Antonio Forenza , Timothy A. Pitman , Benyavut Jirasutayasuntorn , Robert J. Andrzejewski , Stephen G. Perlman
发明人： Antonio Forenza , Timothy A. Pitman , Benyavut Jirasutayasuntorn , Robert J. Andrzejewski , Stephen G. Perlman
CPC分类号： H04B7/024 , H04B7/0465 , H04B7/0626 , H04B7/0691
摘要： Systems and methods are described for enhancing the channel spatial diversity in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”), by exploiting channel selectivity indicators. The proposed methods are: i) antenna selection; ii) user selection; iii) transmit power balancing. All three methods, or any combination of those, are shown to provide significant performance gains in DIDO systems in practical propagation scenarios.
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