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1. 发明申请

WO2011141836A1 EXPLOITING CHANNEL TIME CORRELATION TO REDUCE CHANNEL STATE INFORMATION FEEDBACK BITRATE 审中-公开
标题翻译：消除通道时间关联以减少通道状态信息反馈双向
公开(公告)号：WO2011141836A1
公开(公告)日：2011-11-17
申请号：PCT/IB2011/051758
申请日：2011-04-21
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , CHENG, Jung-Fu , HUI, Dennis , ZANGI, Kambiz , KRASNY, Leonid
发明人： CHENG, Jung-Fu , HUI, Dennis , ZANGI, Kambiz , KRASNY, Leonid
IPC分类号： H04L1/00 , H04B7/06 , H04L1/20 , H04B7/04 , H04B17/00
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。

2. 发明申请

WO2010122536A2 CHANNEL STATE INFORMATION RECONSTRUCTION FROM SPARSE DATA 审中-公开
标题翻译：频道数据重新进行信道重建
公开(公告)号：WO2010122536A2
公开(公告)日：2010-10-28
申请号：PCT/IB2010/051808
申请日：2010-04-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
发明人： CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
IPC分类号： H04L1/00
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 channe! estimates are catenated based on infrequently transmitted Channel State information (CS!) 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 CS! feedback samples are demodulated and inverse quantized. A time domain tap deiay channel model is generated from the inverse quantized CSI feedback samples. The time domain tap delay channe! 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 CS! 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：准确的下行通道！基于来自UE20的不常发送的信道状态信息（CS！）反馈数据来估计估计值。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。收到CS！反馈样本被解调和反量化。从逆量化的CSI反馈样本中产生时域抽头信道模型。时域点击延时通道！模型可以被频率变换以获得频域中的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。频道估计CS！可以预测报告实例，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。

3. 发明申请

WO2010122535A2 EFFICIENT UPLINK TRANSMISSION OF CHANNEL STATE INFORMATION 审中-公开
标题翻译：高效率上行链路传输信道状态信息
公开(公告)号：WO2010122535A2
公开(公告)日：2010-10-28
申请号：PCT/IB2010/051807
申请日：2010-04-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
发明人： CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
IPC分类号： H04L1/00
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： A UE in a wireless communication network transmits succinct, direct channel state information to the network, enabling coordinated multipoint calculations such as joint processing, without substantially increasing uplink overhead. The UE receives and processes reference symbols over a set of non-uniform!y spaced sub-carriers, selected according to a scheme synchronized to the network. The frequency response for each selected sub- carrier is estimated conventionally, and the results quantized and transmitted to the network on an uplink control channel. The non-uniform sub-carrier selection may be synchronized to the network in a variety of ways.
摘要翻译：无线通信网络中的UE向网络发送简洁的直接信道状态信息，实现诸如联合处理之类的协作多点计算，而基本上不增加上行链路开销。 UE根据与网络同步的方案选择的一组不均匀的间隔子载波上接收和处理参考符号。常规地估计每个所选子载波的频率响应，并且在上行链路控制信道上量化并发送到网络的结果。非均匀子载波选择可以以各种方式与网络同步。

4. 发明申请

WO2012063173A1 RECEIVER AND METHOD FOR REDUCING AN AMOUNT OF CHANNEL STATE INFORMATION FEEDBACK TO A TRANSMITTER 审中-公开
标题翻译：一种用于减少信道状态信息反馈到发射机的接收机和方法
公开(公告)号：WO2012063173A1
公开(公告)日：2012-05-18
申请号：PCT/IB2011/054906
申请日：2011-11-03
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HUI, Dennis , CHENG, Jung-Fu , ZANGI, Kambiz , KRASNY, Leonid
发明人： HUI, Dennis , CHENG, Jung-Fu , ZANGI, Kambiz , KRASNY, Leonid
IPC分类号： H04B7/04 , H04B7/06
CPC分类号： H04B7/0417 , H04B7/065 , H04B7/0658 , H04B7/066 , H04B7/0663
摘要： A receiver and a method are described herein for reducing an amount of channel state information related to a transmit channel correlation matrix Φ τχ that is feedback to a transmitter. In addition, to a transmitter and a method are described herein for reconstructing the transmit channel correlation matrix Φ τχ using the reduced channel state feedback information received from the receiver.
摘要翻译：本文描述了一种接收机和方法，用于减少与发射信道相关矩阵Ft？相关的信道状态信息量。这是对发射机的反馈。此外，在这里描述了一种发射机和方法，用于重建发射信道相关矩阵Ft？使用从接收机接收的减少的信道状态反馈信息。

5. 发明申请

WO2010106416A1 SYSTEMS AND METHOD FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSIONS 审中-公开
标题翻译：用于协调多点下行链路传输的系统和方法
公开(公告)号：WO2010106416A1
公开(公告)日：2010-09-23
申请号：PCT/IB2010/000544
申请日：2010-03-15
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
发明人： ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
IPC分类号： H04B7/02 , H04L25/02
CPC分类号： H04B7/024
摘要： A method for determining antenna weights for use in transmitting data from a plurality of base stations to a user device is disclosed. The antenna weights are determined using an input covariance matrix (S), and the input covariance matrix is determined subject to a predetermined power constraint and a predetermined, non-zero interference constraint.
摘要翻译：公开了一种用于确定用于从多个基站向用户设备发送数据的天线权重的方法。使用输入协方差矩阵（S）确定天线权重，并且在预定功率约束和预定的非零干扰约束条件下确定输入协方差矩阵。

6. 发明申请

WO2012123865A1 METHOD OF DOWNLINK SIGNAL TRANSPORT OVER BACKHAUL COMMUNICATIONS THROUGH DISTRIBUTED PROCESSING 审中-公开
标题翻译：通过分布式处理的后向通信的下行信号传输方法
公开(公告)号：WO2012123865A1
公开(公告)日：2012-09-20
申请号：PCT/IB2012/051098
申请日：2012-03-08
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HUI, Dennis , WONG, Shing-Wa , CHENG, Jung-Fu , GUEY, Jiann-Ching , ZANGI, Kambiz
发明人： HUI, Dennis , WONG, Shing-Wa , CHENG, Jung-Fu , GUEY, Jiann-Ching , ZANGI, Kambiz
IPC分类号： H04B7/02 , H04W92/12 , H04W92/20
CPC分类号： H04L5/0073 , H04B7/024 , H04B7/0452 , H04L5/0035 , H04W92/12 , H04W92/20
摘要： The amount of multi-antenna signals to be transmitted over the backhaul in a Coordinated MultiPoint (CoMP) system from the central processor (CP) to each base station is reduced. Embodiments of the present invention exploit characteristics of the underlying signal structure, and distribute some baseband processing functionalities - such as channel coding and the application of the multi-user precoding - from the CP to the remote base stations. Additionally, in some embodiments the non-precoded parts of multi-antenna signals are broadcast from the CP to all base stations in the CoMP system, to further reduce the burden on backhaul communications. In one embodiment, the backhaul network is a Gigabit-capable Passive Optical Network (GPON).
摘要翻译：通过协调多点（CoMP）系统从中央处理器（CP）到每个基站的回程传输的多天线信号的数量减少了。本发明的实施例利用底层信号结构的特征，并将一些基带处理功能（诸如信道编码和多用户预编码的应用）从CP分发到远程基站。此外，在一些实施例中，多天线信号的非预编码部分从CP广播到CoMP系统中的所有基站，以进一步减少回程通信的负担。在一个实施例中，回程网络是千兆位无源光网络（GPON）。

7. 发明申请

WO2010131228A1 DISTRIBUTED COMPUTATION OF PRECODING WEIGHTS FOR COORDINATED MULTIPOINT TRANSMISSION ON THE DOWNLINK 审中-公开
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：WO2010131228A1
公开(公告)日：2010-11-18
申请号：PCT/IB2010/052155
申请日：2010-05-14
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HUI, Dennis , ZANGI, Kambiz
发明人： HUI, Dennis , ZANGI, Kambiz
IPC分类号： H04B7/02
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 preceding 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 RS determines the power availability for transmit antennas in the floating CoMP cell that are shared with other floating CoMP cells, and scales the tentative preceding weights based on the power availability of the shared transmit antennas to determine final preceding 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以形成浮动CoMP小区每个浮动CoMP小区中的服务BS为浮动CoMP小区中的协调BS向浮动CoMP小区的服务小区中的用户的传输计算初步的线性前加权。服务RS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的前一权重，以确定最终的先前权重，使得功率约束的共享发射天线将不会被违反。

8. 发明申请

WO2010061271A2 ORTHOGONAL REFERENCE SIGNALS WITH DIFFERENT BANDWIDTH AND OVERLAPPING SPECTRUM 审中-公开
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：WO2010061271A2
公开(公告)日：2010-06-03
申请号：PCT/IB2009/007551
申请日：2009-11-24
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , ZANGI, Kambiz , DAHLMAN, Erik , HUI, Dennis
发明人： ZANGI, Kambiz , DAHLMAN, Erik , HUI, Dennis
IPC分类号： H04L27/26 , H04L5/00
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。分配给用户终端的子载波被划分为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。

9. 发明申请

WO2010026464A1 CHANNEL ESTIMATION AND EQUALIZATION FOR HARD-LIMITED SIGNALS 审中-公开
标题翻译：硬信号的信道估计和均衡
公开(公告)号：WO2010026464A1
公开(公告)日：2010-03-11
申请号：PCT/IB2009/006722
申请日：2009-09-02
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HUI, Dennis , ZANGI, Kambiz
发明人： HUI, Dennis , ZANGI, Kambiz
IPC分类号： H04L25/02 , H04L25/03
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。

10. 发明申请

WO2011039704A2 ITERATIVE PRECODER MATRIX COMPUTATION METHOD AND APPARATUS 审中-公开
标题翻译：迭代前置矩阵计算方法与装置
公开(公告)号：WO2011039704A2
公开(公告)日：2011-04-07
申请号：PCT/IB2010/054371
申请日：2010-09-28
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HUI, Dennis , ZANGI, Kambiz
发明人： HUI, Dennis , ZANGI, Kambiz
IPC分类号： H04L25/03
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 preceding 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 preceding matrix by transforming the uplink receiver matrix to a revised downlink precoding matrix Steps (b), (c), (d) and (e) are repeated for a pellicular number of iterations to determine a final downlink preceding matrix for the mobile station.
摘要翻译：在与其他基站协调以形成超级小区的基站处采用的预编码器权重通过（a）确定基站处对于由所述终端服务的移动台的初始下行链路先前矩阵（b）基于所述初始下行链路预编码矩阵修改与所述移动站相关联的下行链路接收机矩阵; （c）将所述下行链路接收器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）基于与所述移动台相关联的上行链路预编码器矩阵，修改与所述移动台进行上行链路通信时与每个基站相关联的上行链路接收器矩阵（e）通过将上行链路接收器矩阵变换成修改的下行链路预编码矩阵来修正初始下行链路先前矩阵对于迭代的薄片数量重复步骤（b），（c），（d）和（e）以确定移动台的最终下行链路先行矩阵。

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