公开(公告)号：US20050197149A1

公开(公告)日：2005-09-08

申请号：US11018998

申请日：2004-12-22

申请人： Ana Iacono ,  Janet Stern-Berkowitz ,  Timothy Axness ,  Kambiz Zangi

发明人： Ana Iacono ,  Janet Stern-Berkowitz ,  Timothy Axness ,  Kambiz Zangi

IPC分类号： H03C7/02 ,  H04W52/42

CPC分类号： H01Q3/24 ,  H04W52/42

摘要： A method and apparatus for transmit power control (TPC) while switching a beam among a plurality of beams in a wireless communication system. An antenna array generates a plurality of directional beams and preferably an omni-directional pattern and switches a beam among the plurality of beams preferably including the omni-directional pattern. Link quality on at least one of the plurality of beams is measured, and a beam having a greatest link quality is selected. If the selected beam is different from a current beam, a beam is switched from the current beam to the selected beam. While switching a beam, TPC parameters are adjusted based on the link quality difference between the link quality of the current beam and the link quality of the selected beam, and optionally, base on other parameters.

摘要翻译： 一种用于在无线通信系统中切换多个波束之间的波束的发射功率控制（TPC）的方法和装置。 天线阵列产生多个定向波束并且优选地是全向图案，并且在多个波束之间切换优选包括全向图案的波束。 测量多个光束中的至少一个的链路质量，并且选择具有最大链路质量的光束。 如果所选择的光束与当前光束不同，则将光束从当前光束切换到所选择的光束。 在切换波束时，基于当前波束的链路质量与所选波束的链路质量之间的链路质量差，并且可选地，基于其他参数来调整TPC参数。

公开(公告)号：US20050176385A1

公开(公告)日：2005-08-11

申请号：US11051024

申请日：2005-02-04

申请人： Janet Stern-Berkowitz ,  Ana Iacono ,  Kambiz Zangi

发明人： Janet Stern-Berkowitz ,  Ana Iacono ,  Kambiz Zangi

IPC分类号： H04B15/00 ,  H04W16/28 ,  H04W36/18

CPC分类号： H04W36/18 ,  H04W16/28

摘要： Measurements for handoff are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-directional beam. The WTRU measures signals from a plurality of cells with the omni-directional beam and/or one or more of the directional beams. The WTRU evaluates and reports to the network measurement of the omni-directional beam or the strongest beam for adding cells to an active set of cells. For removing cells from an active set of cells, the WTRU evaluates and reports to the network measurements of the antenna beam selected for communication with the active set cells.

摘要翻译： 用于切换的测量由在无线通信系统中与切换波束天线一起操作的无线发射/接收单元（WTRU）进行。 切换波束天线是产生多个定向波束和全向波束的智能天线。 WTRU使用全向波束和/或一个或多个定向波束来测量来自多个小区的信号。 WTRU评估并报告全向波束或最强波束的网络测量，以将小区添加到活动的小区集合。 为了从活动的小区集中移除小区，WTRU评估并报告被选择用于与活动集合小区通信的天线波束的网络测量。

公开(公告)号：US08923110B2

公开(公告)日：2014-12-30

申请号：US12555973

申请日：2009-09-09

申请人： Jung-Fu Cheng ,  Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

发明人： Jung-Fu Cheng ,  Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

IPC分类号： H04J11/00 ,  H04B7/02 ,  H04B17/00 ,  H04L1/20 ,  H04L25/02 ,  H04L1/00 ,  H04B7/06

CPC分类号： H04B17/0047 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/336 ,  H04B17/364 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224

摘要： Accurate downlink channel estimates are calculated based on infrequently transmitted Channel State Information (CSI) feedback data from a UE 20. A plurality of non-uniformly spaced digital CSI feedback samples, representing the frequency response of a downlink communication channel, is received from the UE. The received CSI feedback samples are demodulated and inverse quantized. A time domain tap delay channel model is generated from the inverse quantized CSI feedback samples. The time domain tap delay channel model may be frequency-transformed to obtain a reconstructed frequency response of the downlink communication channel in the frequency domain. Alternatively, channel delays may be estimated based on prior delays and/or known references signals transmitted on the uplink. Channel estimates between CSI reporting instances may be predicted, such as by a sample & hold or a linear predictor. The delays may be presumed fixed, and Kalman filter coefficients evolved over time.

摘要翻译： 基于来自UE20的不频繁发送的信道状态信息（CSI）反馈数据来计算准确的下行链路信道估计。从UE接收表示下行链路通信信道的频率响应的多个非均匀间隔的数字CSI反馈样本 。 接收的CSI反馈样本被解调和反量化。 时域抽头延迟信道模型是从逆向量化的CSI反馈样本生成的。 时域抽头延迟信道模型可以被频率变换以获得频域中下行链路通信信道的重构频率响应。 或者，可以基于在上行链路上发送的先前的延迟和/或已知的参考信号来估计信道延迟。 可以预测CSI报告实例之间的信道估计，例如通过采样和保持或线性预测器。 可以推测延迟是固定的，并且卡尔曼滤波器系数随时间演化。

公开(公告)号：US08811974B2

公开(公告)日：2014-08-19

申请号：US12346358

申请日：2008-12-30

申请人： Abdulfauf Hafeez ,  Jiann-Ching Guey ,  Sven Oscar Petersson ,  Kambiz Zangi

发明人： Abdulfauf Hafeez ,  Jiann-Ching Guey ,  Sven Oscar Petersson ,  Kambiz Zangi

IPC分类号： H04W4/00

CPC分类号： H04W16/02 ,  H04W16/28

摘要： Multipoint wireless communications are coordinated in cells with radiation that is emanated from antennas in an inward direction. In an example embodiment, an apparatus includes a first antenna, a second antenna, a third antenna and a controller. The first antenna emanates radiation from a first location in an inwardly direction for a cell. The second antenna emanates radiation from a second location in an inwardly direction for the cell. The third antenna emanates radiation from a third location in an inwardly direction for the cell. The controller coordinates the emanation of the radiation via the first, second, and third antennas so as to reduce intra-cell interference for remote terminals located within the cell. The coordination may be effected in accordance with one or more coordinated multi-point (transmission/reception) (CoMP) techniques. Different numbers of sub-cells and antennas per cell and different CoMP cell organizations may be implemented.

摘要翻译： 多点无线通信在具有向内方向上从天线发出的辐射的小区中协调。 在示例实施例中，一种装置包括第一天线，第二天线，第三天线和控制器。 第一天线从单元的向内方向的第一位置发出辐射。 第二天线从小区的向内方向的第二位置发射辐射。 第三天线从单元的内向的第三位置发出辐射。 控制器通过第一，第二和第三天线来协调辐射的发射，以便减少位于小区内的远程终端的小区内干扰。 协调可以根据一个或多个协调的多点（发送/接收）（CoMP）技术来实现。 可以实现每个细胞和不同CoMP细胞组织的不同数量的子细胞和天线。

公开(公告)号：US20130223330A1

公开(公告)日：2013-08-29

申请号：US13883055

申请日：2010-11-03

申请人： Jonas Medbo ,  Sven Petersson ,  Kambiz Zangi

发明人： Jonas Medbo ,  Sven Petersson ,  Kambiz Zangi

IPC分类号： H04W16/26

CPC分类号： H04W16/26 ,  H04B7/155

摘要： The invention relates to a repeater arrangement for amplifying a communication link between a base station and user equipment, wherein the communication link comprises an uplink and a downlink utilizing frequencies within a coherence bandwidth. The repeater arrangement comprises: a first antenna for communication with the base station; a second antenna for communication with the user equipment; an amplifying device operatively connected to the first antenna and to the second antenna for conveying and amplifying communication signals between the first antenna and the second antenna, the amplifying device comprising a first signal path for the uplink and a second signal path for the downlink, the first and second signal paths having equal electrical length, in order to affect said communication signal identically in both uplink and downlink, providing same phase and amplitude characteristics to said communication signal.

摘要翻译： 本发明涉及一种用于放大基站和用户设备之间的通信链路的中继器装置，其中通信链路包括使用相干带宽内的频率的上行链路和下行链路。 中继器装置包括：用于与基站通信的第一天线; 用于与用户设备通信的第二天线; 放大装置，可操作地连接到第一天线和第二天线，用于传送和放大第一天线和第二天线之间的通信信号，放大装置包括用于上行链路的第一信号路径和用于下行链路的第二信号路径， 第一和第二信号路径具有相等的电长度，以便在上行链路和下行链路中同样地影响所述通信信号，向所述通信信号提供相同的相位和幅度特性。

公开(公告)号：US08219128B2

公开(公告)日：2012-07-10

申请号：US12483603

申请日：2009-06-12

申请人： Kambiz Zangi ,  Abdulrauf Hafeez ,  Dennis Hui

发明人： Kambiz Zangi ,  Abdulrauf Hafeez ,  Dennis Hui

IPC分类号： H04B15/00 ,  H04B17/00 ,  H04B7/185

CPC分类号： H04L1/0001 ,  H04J11/0053 ,  H04L1/0022 ,  H04L1/0034 ,  H04L5/0035

摘要： A Coordinated MultiPoint (CoMP) cell controller performs network-centric link adaptation for User Equipment (UE) in the CoMP cell. The CoMP cell controller receives at least infrequent channel estimates from a UE in the CoMP cell, from which it estimates downlink channel and thermal noise at the UE. The CoMP cell controller is aware of the desired signal to be received at the UE, and the intra-CoMP cell interference to the UE caused by transmissions to other UEs in the CoMP cell. The CoMP cell receives from the UE reports of inter-CoMP cell interference caused by transmissions by other CoMP cells. Based on the downlink channel quality, the desired signal, the intra-CoMP cell interference, the inter-CoMP cell interference, and the thermal noise, the CoMP cell controller performs link adaptation by selecting modulation and coding schemes, and other transmission parameters, for an upcoming transmission duration (such as a TTI).

摘要翻译： 协调多点（CoMP）小区控制器在CoMP小区中为用户设备（UE）执行以网络为中心的链路自适应。 CoMP小区控制器从CoMP小区中的UE接收至少不频繁的信道估计，从​​UE估计UE处的下行链路信道和热噪声。 CoMP小区控制器知道将在UE处接收的期望信号，以及由CoMP小区中的其他UE的传输引起的对UE的CoMP小区干扰。 CoMP小区从UE接收由其他CoMP小区的传输引起的CoMP间干扰的干扰。 基于下行链路信道质量，期望信号，CoMP间小区干扰，CoMP间干扰和热噪声，CoMP小区控制器通过选择调制和编码方案以及其他传输参数来执行链路自适应，用于 即将到来的传输持续时间（如TTI）。

公开(公告)号：US08107965B2

公开(公告)日：2012-01-31

申请号：US12547817

申请日：2009-08-26

申请人： Dennis Hui ,  Kambiz Zangi

发明人： Dennis Hui ,  Kambiz Zangi

IPC分类号： H04W52/30

CPC分类号： H04B7/024 ,  H04B7/0615 ,  H04W52/365

摘要： In a Coordinated Multi-point (CoMP) system, the base station (BS) in each serving cell (or sector) is allowed to use not only its own antennas, but also the antennas of neighboring BSs to transmit to mobile terminals in the serving cell to form a floating CoMP cell. The serving BS in each floating CoMP cell computes tentative linear precoding weights for transmissions from the coordinating BSs in the floating CoMP cell to users in the serving cell of the floating CoMP cell. The serving BS determines the power availability for transmit antennas in the floating CoMP cell that are shared with other floating CoMP cells, and scales the tentative precoding weights based on the power availability of the shared transmit antennas to determine final precoding weights so that the power constraints of the shared transmit antennas will not be violated.

摘要翻译： 在协调多点（CoMP）系统中，每个服务小区（或扇区）中的基站（BS）被允许不仅使用其自己的天线，而且还使用相邻BS的天线来发送给服务中的移动终端 细胞形成浮游CoMP细胞。 每个浮动CoMP单元中的服务BS为浮动CoMP小区中的协调BS的传输计算用于在浮动CoMP小区的服务小区中的用户的临时线性预编码权重。 服务BS确定与其他浮动CoMP小区共享的浮动CoMP小区中的发射天线的功率可用性，并且基于共享发射天线的功率可用性来缩放初步预编码权重，以确定最终预编码权重，使得功率约束 的共享发射天线将不会被违反。

公开(公告)号：US08064849B2

公开(公告)日：2011-11-22

申请号：US12027421

申请日：2008-02-07

申请人： Kambiz Zangi

发明人： Kambiz Zangi

IPC分类号： H04B1/04

CPC分类号： H04B7/0417 ,  H04B7/0426 ,  Y02D70/444

摘要： A wireless network (20) participates in radio frequency communication with plural wireless terminals (30). The network (20) comprises plural transmitters (40); a precoder value processor (42) configured to develop a set of precoder values; and a precoder (44) which uses the precoder values for coding the signals transmitted from the plural transmitters. The precoder value processor (42) is configured to develop a set of frequency-independent, linear precoder values for use in precoding signals transmitted from the plural transmitters (30). Each vector of the set is associated with one wireless terminal (30). The set of precoder values is determined such that a set of target average signal to interference noise (SINR) ratios is achieved by the plural wireless terminals with a predetermined total transmit power. Preferably, the predetermined total transmit power is minimum total transmit power.

摘要翻译： 无线网络（20）参与与多个无线终端（30）的射频通信。 网络（20）包括多个发射机（40）; 配置为开发一组预编码器值的预编码器值处理器（42） 以及使用预编码器值对从多个发射机发射的信号进行编码的预编码器（44）。 预编码器值处理器（42）被配置为开发用于从多个发射机（30）发送的预编码信号中使用的一组频率无关的线性预编码器值。 该集合的每个向量与一个无线终端（30）相关联。 确定一组预编码器值，使得具有预定总发射功率的多个无线终端实现目标平均信号与干扰噪声（SINR）比的集合。 优选地，预定总发射功率是最小总发射功率。

公开(公告)号：US20110280287A1

公开(公告)日：2011-11-17

申请号：US12779106

申请日：2010-05-13

申请人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

发明人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

IPC分类号： H04B1/38 ,  H04B7/02

CPC分类号： H04W72/0413 ,  H04L1/0019 ,  H04L1/0028 ,  H04L1/20 ,  H04W72/042

摘要： The required bitrate for reporting channel state information from a network transceiver to the network is dramatically reduced, while maintaining fidelity of channel estimates, by exploiting prior channel estimates and the time correlation of channel response. For a selected set of sub-carriers, the transceiver estimates channel frequency response from pilot signals. The transceiver also predicts the frequency response for each selected sub-carrier, by multiplying a state vector comprising prior frequency response estimate and a coefficient vector comprising linear predictive coefficients. The predicted frequency response is subtracted from the estimated frequency response, and the prediction error is quantized and transmitted to the network. The network maintains a corresponding state vector and predictive coefficient vector, and also predicts a frequency response for each selected sub-carrier. The received prediction error is inverse quantized and subtracted from the predicted frequency response to yield a frequency response corresponding to that estimated at the transceiver.

摘要翻译： 通过利用先前的信道估计和信道响应的时间相关性，可以显着降低从网络收发器向网络报告信道状态信息所需的比特率，同时保持信道估计的保真度。 对于所选择的一组子载波，收发器估计来自导频信号的信道频率响应。 收发器还通过将包括先前频率响应估计的状态向量和包括线性预测系数的系数向量相乘来预测每个所选子载波的频率响应。 从估计的频率响应中减去预测的频率响应，并将预测误差量化并发送到网络。 网络维持相应的状态向量和预测系数向量，并且还预测每个选择的子载波的频率响应。 接收的预测误差被反量化，并从预测的频率响应中减去，以产生与在收发机处估计的频率响应相对应的频率响应。

公开(公告)号：US20100317355A1

公开(公告)日：2010-12-16

申请号：US12483603

申请日：2009-06-12

申请人： Kambiz Zangi ,  Abdulrauf Hafeez ,  Dennis Hui

发明人： Kambiz Zangi ,  Abdulrauf Hafeez ,  Dennis Hui

IPC分类号： H04B15/00 ,  H04W72/04

CPC分类号： H04L1/0001 ,  H04J11/0053 ,  H04L1/0022 ,  H04L1/0034 ,  H04L5/0035

摘要： A Coordinated MultiPoint (CoMP) cell controller performs network-centric link adaptation for User Equipment (UE) in the CoMP cell. The CoMP cell controller receives at least infrequent channel estimates from a UE in the CoMP cell, from which it estimates downlink channel and thermal noise at the UE. The CoMP cell controller is aware of the desired signal to be received at the UE, and the intra-CoMP cell interference to the UE caused by transmissions to other UEs in the CoMP cell. The CoMP cell receives from the UE reports of inter-CoMP cell interference caused by transmissions by other CoMP cells. Based on the downlink channel quality, the desired signal, the intra-CoMP cell interference, the inter-CoMP cell interference, and the thermal noise, the CoMP cell controller performs link adaptation by selecting modulation and coding schemes, and other transmission parameters, for an upcoming transmission duration (such as a TTI).

摘要翻译： 协调多点（CoMP）小区控制器在CoMP小区中为用户设备（UE）执行以网络为中心的链路自适应。 CoMP小区控制器从CoMP小区中的UE接收至少不频繁的信道估计，从​​UE估计UE处的下行链路信道和热噪声。 CoMP小区控制器知道将在UE处接收的期望信号，以及由CoMP小区中的其他UE的传输引起的对UE的CoMP小区干扰。 CoMP小区从UE接收由其他CoMP小区的传输引起的CoMP间干扰的干扰。 基于下行链路信道质量，期望信号，CoMP间小区干扰，CoMP间干扰和热噪声，CoMP小区控制器通过选择调制和编码方案以及其他传输参数来执行链路自适应，用于 即将到来的传输持续时间（如TTI）。