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21. 发明授权

US08432993B2 Using spatial properties of MIMO channels for enhanced channel estimation in MIMO systems 有权
标题翻译：使用MIMO信道的空间属性来增强MIMO系统中的信道估计
公开(公告)号：US08432993B2
公开(公告)日：2013-04-30
申请号：US12810360
申请日：2007-12-27
申请人： Kambiz Zangi , Leonid Krasny
发明人： Kambiz Zangi , Leonid Krasny
IPC分类号： H04B7/02
CPC分类号： H04B7/0413 , H04L5/0048 , H04L25/0204 , H04L25/0224 , H04L25/0244 , H04L27/2647
摘要： An apparatus for estimating a channel response associated with a multiple input/multiple output (MIMO) system includes an antenna that receives multiple pilot symbols, each of the multiple pilot symbols transmitted from a different one of multiple transmit antennas of a transmitter in the MIMO system. The apparatus further includes a channel estimator that determines spatial, time and frequency correlations of channels of the MIMO system among the multiple transmit antennas when estimating a channel response associated with the MIMO system based on multiple ones of the received plurality of pilot symbols.
摘要翻译：用于估计与多输入/多输出（MIMO）系统相关联的信道响应的装置包括：天线，其接收多个导频符号，所述多个导频符号中的每一个从MIMO系统中的发射机的多个发射天线中的不同发射天线发送。该装置还包括信道估计器，其基于接收到的多个导频符号中的多个导频符号估计与MIMO系统相关联的信道响应，确定MIMO系统在多个发射天线中的信道的空间，时间和频率相关性。

22. 发明授权

US08094762B2 Joint estimation of MIMO channels and noise correlation for wireless systems with multiple receive antennas 有权
标题翻译：具有多个接收天线的无线系统的MIMO信道和噪声相关的联合估计
公开(公告)号：US08094762B2
公开(公告)日：2012-01-10
申请号：US12114516
申请日：2008-05-02
申请人： Leonid Krasny , Kambiz Zangi
发明人： Leonid Krasny , Kambiz Zangi
IPC分类号： H04B1/10 , H04B7/02
CPC分类号： H04B7/0851 , H04L25/0204 , H04L25/0224 , H04L25/0242
摘要： A radio communication sent by a transmitter having M transmit antennas is received by a receiver having N receive antennas, where M is a positive integer greater than or equal to one and N is positive integer greater than one. Thus, N output signals, one for each receive antenna, are received. The signal transmitted from each transmit antenna includes predetermined pilot symbols known by the receiver and information symbols to be determined by the receiver. Weights for estimating each of M×N single-input/single-output channels between transmit and receive antennas are determined based on jointly processing pilot symbols received on all of the N receive antennas. The M×N channels are estimated based on the determined weights, and those estimated channels are used to determine the information symbols. An iterative procedure is used to estimate the M×N channels using a noise correlation matrix estimate and to estimate the noise correlation matrix using the M×N channel estimates.
摘要翻译：由具有M个发射天线的发射机发送的无线电通信由具有N个接收天线的接收机接收，其中M是大于或等于1的正整数，并且N是大于1的正整数。因此，接收每个接收天线一个N个输出信号。从每个发送天线发送的信号包括接收机已知的预定导频符号和由接收机确定的信息符号。基于在所有N个接收天线上接收到的导频符号共同确定用于估计发射天线和接收天线之间的每个M×N个单输入/单输出信道的权重。基于所确定的权重来估计M×N个信道，并且使用那些估计的信道来确定信息符号。使用迭代过程使用噪声相关矩阵估计来估计M×N个信道，并且使用M×N信道估计来估计噪声相关矩阵。

23. 发明授权

US08675718B2 Iterative precoder matrix computation method and apparatus 有权
标题翻译：迭代预编码矩阵计算方法和装置
公开(公告)号：US08675718B2
公开(公告)日：2014-03-18
申请号：US12571494
申请日：2009-10-01
申请人： Dennis Hui , Kambiz Zangi
发明人： Dennis Hui , Kambiz Zangi
IPC分类号： H04B1/38 , H04L27/00 , H04L7/00
CPC分类号： H04L25/03343 , H04B7/024 , H04B7/0617 , H04L5/0035 , H04L25/0204
摘要： Precoder weights employed at a base station which coordinates with other base stations to form a super-cell are determined by: (a) determining an initial downlink precoding matrix at the base station for a mobile station serviced by the base station in the super-cell; (b) revising a downlink receiver matrix associated with the mobile station based on the initial downlink precoding matrix; (c) transforming the downlink receiver matrix to an uplink precoder matrix associated with the mobile station; (d) revising an uplink receiver matrix associated with each base station in uplink communication with the mobile station based on the uplink precoder matrix associated with the mobile station; and (e) revising the initial downlink precoding matrix by transforming the uplink receiver matrix to a revised downlink precoding matrix. Steps (b), (c), (d) and (e) are repeated for a particular number of iterations to determine a final downlink precoding matrix for the mobile station.
摘要翻译：通过以下方式确定在与其他基站协调以形成超小区的基站处采用的预编码器权重：（a）确定在基站处由基站在超小区中服务的移动台的初始下行链路预编码矩阵 ; （b）基于初始下行链路预编码矩阵修改与移动台相关联的下行链路接收机矩阵; （c）将所述下行链路接收机矩阵变换为与所述移动台相关联的上行链路预编码器矩阵; （d）基于与所述移动站相关联的所述上行链路预编码器矩阵，修改与所述移动站的上行链路通信中与每个基站相关联的上行链路接收机矩阵; 以及（e）通过将所述上行链路接收机矩阵变换为修改的下行链路预编码矩阵来修改所述初始下行链路预编码矩阵。对于特定次数的迭代重复步骤（b），（c），（d）和（e）以确定移动台的最终下行链路预编码矩阵。

24. 发明授权

US08379709B2 Channel estimation and equalization for hard-limited signals 有权
标题翻译：硬限制信号的信道估计和均衡
公开(公告)号：US08379709B2
公开(公告)日：2013-02-19
申请号：US12204217
申请日：2008-09-04
申请人： Dennis Hui , Kambiz Zangi
发明人： Dennis Hui , Kambiz Zangi
IPC分类号： H04L27/01
CPC分类号： H04B1/1027 , H04L25/0228 , H04L25/03019
摘要： The present invention provides a method and apparatus for channel estimation when the amplitude of a received signal is hard-limited. A channel estimator computes amplitude estimates for the received signal based on the phase samples of the received signal and previous channel estimates. The amplitude estimates may comprise the expected values of the amplitude given the phase samples and the initial channel estimates. The channel estimator then computes revised channel estimates based on the amplitude estimates and the phase samples. The process may be performed iteratively to refine the channel estimates during each iteration.
摘要翻译：本发明提供了当接收信号的幅度受到严格限制时的信道估计方法和装置。信道估计器基于接收信号和先前信道估计的相位采样来计算接收信号的幅度估计。幅度估计可以包括给定相位采样的幅度的预期值和初始信道估计。然后，信道估计器基于幅度估计和相位样本来计算修正的信道估计。可以迭代地执行该过程以在每次迭代期间优化信道估计。

25. 发明申请

US20100279729A1 Zero-Forcing Linear Beamforming for Coordinated Cellular Networks with Distributed Antennas 有权
标题翻译：用于具有分布式天线的协调蜂窝网络的零强迫线性波束成形
公开(公告)号：US20100279729A1
公开(公告)日：2010-11-04
申请号：US12746372
申请日：2008-01-08
申请人： Dennis Hui , Kambiz Zangi
发明人： Dennis Hui , Kambiz Zangi
IPC分类号： H04B7/00
CPC分类号： H04B7/0617 , H04B7/024 , H04B7/0426 , H04B7/0465 , H04W52/346
摘要： In a distributed antenna system that includes a plurality of transmitters and a controller, a method, performed by the controller, may be characterized by performing dirty-paper coding on downlink transmissions to users based on an order of the users, calculating beamforming vectors to provide that each of the downlink transmissions associated with each of the users does not interfere with other users, and maximizing, based on the calculated beamforming vectors, a data rate subject to a power constraint of the distributed antenna system.
摘要翻译：在包括多个发射机和控制器的分布式天线系统中，由控制器执行的方法的特征在于，基于用户的次序对用户的下行链路传输执行脏纸编码，计算波束形成向量以提供与每个用户相关联的每个下行链路传输不会干扰其他用户，并且基于所计算的波束形成向量，最大化受到分布式天线系统的功率约束的数据速率。

26. 发明授权

US08219128B2 Network-centric link adaptation for coordinated multipoint downlink transmission 有权
标题翻译：用于协调多点下行链路传输的以网络为中心的链路自适应
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）。

27. 发明授权

US08107965B2 Distributed computation of precoding weights for coordinated multipoint transmission on the downlink 有权
标题翻译：分布式计算下行链路上协调多点传输的预编码权重
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。

28. 发明申请

US20100317355A1 Network-Centric Link Adaptation for Coordinated Multipoint Downlink Transmission 有权
标题翻译：用于协调多点下行链路传输的以网络为中心的链路适配
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）。

29. 发明申请

US20100290382A1 DISTRIBUTED COMPUTATION OF PRECODING WEIGHTS FOR COORDINATED MULTIPOINT TRANSMISSION ON THE DOWNLINK 有权
标题翻译：下行链路上协调多点传输的预编码权重分配计算
公开(公告)号：US20100290382A1
公开(公告)日：2010-11-18
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： H04H20/71
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。

30. 发明申请

US20100128683A1 ORTHOGONAL REFERENCE SIGNALS WITH DIFFERENT BANDWIDTH AND OVERLAPPING SPECTRUM 有权
标题翻译：具有不同带宽和重叠频谱的正交参考信号
公开(公告)号：US20100128683A1
公开(公告)日：2010-05-27
申请号：US12324073
申请日：2008-11-26
申请人： Kambiz Zangi , Erik Dahlman , Dennis Hui
发明人： Kambiz Zangi , Erik Dahlman , Dennis Hui
IPC分类号： H04J11/00 , H04W72/04
CPC分类号： H04L5/0051 , H04L5/0007 , H04L5/0062 , H04L25/0202
摘要： The present invention provides a method of generating mutually orthogonal reference signals for different user terminals in and OFDM system that span different but overlapping subcarriers. The subcarriers allocated to the user terminals are divided into a plurality of non-overlapping subcarrier blocks. Each user terminal is then allocated one or more subcarrier blocks. For each subcarrier block, a user terminal is assigned a reference signal comprising a base reference sequence and a linear phase rotation. To ensure mutual orthogonality among all user terminals, user terminals allocated the same subcarrier block use the same base reference sequence with different linear phase rotations.
摘要翻译：本发明提供了一种对跨越不同但重叠的子载波的不同用户终端和OFDM系统生成相互正交参考信号的方法。分配给用户终端的副载波被划分成多个不重叠的副载波块。然后，每个用户终端被分配一个或多个子载波块。对于每个子载波块，向用户终端分配包括基本参考序列和线性相位旋转的参考信号。为了确保所有用户终端之间的相互正交性，分配相同子载波块的用户终端使用具有不同线性相位旋转的相同的基准参考序列。

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