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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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2.发明申请SYSTEMS AND METHODS FOR RADIO FREQUENCY CALIBRATION EXPLOITING CHANNEL RECIPROCITY IN DISTRIBUTED INPUT DISTRIBUTED OUTPUT WIRELESS COMMUNICATIONS 审中-公开无线电频率校准系统和方法在分布式输入分布式无线通信中实现频道重现公开(公告)号：US20140269502A1
公开(公告)日：2014-09-18
申请号：US13844355
申请日：2013-03-15
IPC分类号： H04B7/04
摘要： Systems and methods are described for radio frequency (RF) calibration in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”) exploiting uplink/downlink channel reciprocity. The RF calibration is used to compute open-loop downlink precoder based on uplink channel estimates, thereby avoiding feedback overhead for channel state information as in closed-loop schemes. For example, a MU-MAS of one embodiment comprises a wireless cellular network with one or multiple beacon stations, multiple client devices and multiple distributed antennas operating cooperatively via precoding methods to eliminate inter-client interference and increase network capacity.
摘要翻译： 描述了利用上行链路/下行链路信道互易性的具有多用户（MU）传输（MU-MAS）的多天线系统（MAS）中的射频（RF）校准的系统和方法。 RF校准用于基于上行链路信道估计来计算开环下行链路预编码器，从而避免在闭环方案中的信道状态信息的反馈开销。 例如，一个实施例的MU-MAS包括具有一个或多个信标站，多个客户端设备和多个分布式天线的无线蜂窝网络，其经由预编码方法协同工作以消除客户间干扰并增加网络容量。
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公开(公告)号：US20230283327A1
公开(公告)日：2023-09-07
申请号：US18144838
申请日：2023-05-08
IPC分类号： H04B7/0456 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0626
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.
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公开(公告)号：US10187133B2
公开(公告)日：2019-01-22
申请号：US12802958
申请日：2010-06-16
摘要： A system and machine-implemented method are described for adjusting communication with a first distributed-input-distributed-output (DIDO) client. For example, a method according to one embodiment of the invention comprises: applying DIDO weights to one or more data streams to generate one or more DIDO precoded data streams; receiving input channel quality information (CQI) and/or channel state information (CSI) related to DIDO communication channels over which the DIDO precoded data streams are to be transmitted; determining a power scaling factor based on the CQI and/or CSI; and applying the power scaling factor to each of the DIDO precoded data streams.
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5.发明授权System and method for adjusting DIDO interference cancellation based on signal strength measurements 有权基于信号强度测量来调整DIDO干扰消除的系统和方法公开(公告)号：US08971380B2
公开(公告)日：2015-03-03
申请号：US13461682
申请日：2012-05-01
CPC分类号： H04B17/0042 , H04B7/0417 , H04B17/24 , H04B17/309 , H04B17/318 , H04B17/345 , H04L5/0023 , H04L5/0048 , H04L5/0057 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L25/0248 , H04L25/03343 , H04L27/2655 , H04L2025/03414 , H04L2025/0342 , H04L2025/03426 , H04L2025/03802
摘要： A machine-implemented system and method are described for removing interference between adjacent distributed-input-distributed-output (DIDO) clusters comprising. For example, a method according to one embodiment comprises: detecting signal strength at a first client from a main DIDO cluster; detecting interference signal strength at the first client from an interfering DIDO cluster; if the signal strength from the main DIDO cluster reaches a specified value relative to the value of the interference signal strength from the interfering DIDO cluster, then generating channel state information (CSI) defining channel state between one or more antennas of the first client and one or more antennas of the interfering DIDO cluster; transmitting the CSI from the first client to a base transceiver station (BTS) in the interfering DIDO cluster; and implementing DIDO precoding with inter-DIDO-cluster interference (IDCI) cancellation at the BTS in the interfering DIDO cluster to avoid RF interference at the first client.
摘要翻译： 描述了用于消除相邻分布式输入分布式输出（DIDO）群集之间的干扰的机器实现的系统和方法，包括。 例如，根据一个实施例的方法包括：从主DIDO簇检测第一客户端处的信号强度; 从干扰DIDO簇检测第一客户端处的干扰信号强度; 如果来自主DIDO簇的信号强度相对于来自干扰DIDO簇的干扰信号强度的值达到指定值，则产生定义第一客户端的一个或多个天线之间的信道状态的信道状态信息（CSI）和一个 或更多的干扰DIDO簇的天线; 将CSI从第一客户端发送到干扰DIDO簇中的基站收发器（BTS）; 并且在干扰DIDO簇中的BTS处实施DIDO簇间干扰（IDCI）消除的DIDO预编码，以避免在第一客户端处的RF干扰。
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6.发明授权公开(公告)号：US08571086B2
公开(公告)日：2013-10-29
申请号：US12802938
申请日：2010-06-16
IPC分类号： H04L27/30
CPC分类号： H04L27/364 , H04B7/024 , H04B7/0413 , H04L1/0003 , H04L27/2626
摘要： A system and machine-implemented method are described for performing precoding interpolation in a DIDO system which employs orthogonal frequency-division multiplexing (OFDM) and DIDO precoding to communicate with a plurality of distributed-input-distributed-output (DIDO) clients. For example, a system according to one embodiment of the invention comprises: selecting a first subset of ODFM tones to determine a first subset of precoding weights; deriving a second subset of precoding weights for a second subset of ODFM tones by interpolating between the first subset of precoding weights; and using a combination of the first subset of precoding weights and the second subset of precoding weights to precode a data stream prior to transmitting the data stream to a DIDO client.
摘要翻译： 描述了一种系统和机器实现的方法，用于在采用正交频分复用（OFDM）和DIDO预编码以与多个分布式输入分布式输出（DIDO）客户端进行通信的DIDO系统中进行预编码内插。 例如，根据本发明的一个实施例的系统包括：选择ODFM音调的第一子集以确定预编码权重的第一子集; 通过在所述预编码权重的所述第一子集之间进行内插，得到ODFM音调的第二子集的预编码权重的第二子集; 以及使用预编码权重的第一子集和预编码权重的第二子集的组合来在将数据流发送到DIDO客户端之前对数据流进行预编码。
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7.发明授权Systems and methods to coordinate transmissions in distributed wireless systems via user clustering 有权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公开(公告)号：US08542763B2
公开(公告)日：2013-09-24
申请号：US12917257
申请日：2010-11-01
IPC分类号： H04B7/02
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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8.发明申请SYSTEM AND METHOD FOR ADJUSTING DIDO INTERFERENCE CANCELLATION BASED ON SIGNAL STRENGTH MEASUREMENTS 审中-公开基于信号强度测量调整DIDO干扰消除的系统和方法公开(公告)号：US20130034130A1
公开(公告)日：2013-02-07
申请号：US13461682
申请日：2012-05-01
CPC分类号： H04B17/0042 , H04B7/0417 , H04B17/24 , H04B17/309 , H04B17/318 , H04B17/345 , H04L5/0023 , H04L5/0048 , H04L5/0057 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L25/0248 , H04L25/03343 , H04L27/2655 , H04L2025/03414 , H04L2025/0342 , H04L2025/03426 , H04L2025/03802
摘要： A machine-implemented system and method are described for removing interference between adjacent distributed-input-distributed-output (DIDO) clusters comprising. For example, a method according to one embodiment comprises: detecting signal strength at a first client from a main DIDO cluster; detecting interference signal strength at the first client from an interfering DIDO cluster; if the signal strength from the main DIDO cluster reaches a specified value relative to the value of the interference signal strength from the interfering DIDO cluster, then generating channel state information (CSI) defining channel state between one or more antennas of the first client and one or more antennas of the interfering DIDO cluster; transmitting the CSI from the first client to a base transceiver station (BTS) in the interfering DIDO cluster; and implementing DIDO precoding with inter-DIDO-cluster interference (IDCI) cancellation at the BTS in the interfering DIDO cluster to avoid RF interference at the first client.
摘要翻译： 描述了用于消除相邻分布式输入分布式输出（DIDO）群集之间的干扰的机器实现的系统和方法，包括。 例如，根据一个实施例的方法包括：从主DIDO簇检测第一客户端处的信号强度; 从干扰DIDO簇检测第一客户端处的干扰信号强度; 如果来自主DIDO簇的信号强度相对于来自干扰DIDO簇的干扰信号强度的值达到指定值，则产生定义第一客户端的一个或多个天线之间的信道状态的信道状态信息（CSI）和一个 或更多的干扰DIDO簇的天线; 将CSI从第一客户端发送到干扰DIDO簇中的基站收发器（BTS）; 并且在干扰DIDO簇中的BTS处实施DIDO簇间干扰（IDCI）消除的DIDO预编码，以避免在第一客户端处的RF干扰。
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9.发明授权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：US08307922B2
公开(公告)日：2012-11-13
申请号：US12291856
申请日：2008-11-14
IPC分类号： B60L9/00
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/或电路传送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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10.发明申请公开(公告)号：US20120087430A1
公开(公告)日：2012-04-12
申请号：US13232996
申请日：2011-09-14
IPC分类号： H04B7/02
CPC分类号： H04B7/0434 , H04B7/024 , H04B7/0452 , H04B7/0617 , H04B7/0626
摘要： Non-linear or linear precoding is used to create separate areas of coherence to different users. Limited feedback techniques may also be employed to send channel state information (CSI) from the plurality of users to the MU-MAS. In some embodiments, a codebook is built based on basis functions that span the radiated field of a transmit array. Additionally, the precoding may be continuously updated to create non-interfering areas of coherence to the users as the wireless channel changes due to Doppler effect. Moreover, the size of the areas of coherence may be dynamically adjusted depending on the distribution of users.
摘要翻译： 非线性或线性预编码用于为不同的用户创建单独的相干区域。 还可以采用有限的反馈技术来从多个用户向MU-MAS发送信道状态信息（CSI）。 在一些实施例中，基于跨越发射阵列的辐射场的基函数构建码本。 此外，随着无线信道由于多普勒效应而改变，预编码可以被连续地更新以产生与用户的一致性的非干扰区域。 此外，可以根据用户的分布动态调整相干区域的大小。
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