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1. 发明申请

WO2005050937A1 METHODS AND APPARATUS FOR PRE-FILTERING A SIGNAL TO INCREASE SIGNAL-TO-NOISE RATIO AND DECORRELATE NOISE 审中-公开
标题翻译：用于预先过滤信号以增加信号噪声和装饰噪声的方法和装置
公开(公告)号：WO2005050937A1
公开(公告)日：2005-06-02
申请号：PCT/US2004/038412
申请日：2004-11-16
申请人： TELEFONAKTIEBOLAGET L.M. ERICSSON (PUBL) , HAFEEZ, Abdulrauf , ARSLAN, Huseyin , HUI, Dennis , RAMESH, Rajaram
发明人： HAFEEZ, Abdulrauf , ARSLAN, Huseyin , HUI, Dennis , RAMESH, Rajaram
IPC分类号： H04L25/03
CPC分类号： H04L25/03133 , H04L2025/03605
摘要： To receive a signal from a multiple-input-multiple-output (MIMO) communication channel, initial channel taps are generated based on an impulse response estimate of the MIMO communication channel. The received signal is pre-filtered (350) using the initial channel taps to generate output channel taps and a corresponding output signal having an increased signal-to-noise ratio (SNR) and uncorrelated noise. The SNR is based on a ratio of the energy in a first subset of the output channel taps to the energy in a second subset of the output channel taps.
摘要翻译：为了从多输入多输出（MIMO）通信信道接收信号，基于MIMO通信信道的脉冲响应估计来生成初始信道抽头。使用初始信道抽头对接收到的信号进行预滤波（350），以产生输出信道抽头和具有增加的信噪比（SNR）和不相关噪声的相应输出信号。 SNR基于输出信道抽头的第一子集中的能量与输出信道抽头的第二子集中的能量的比率。

2. 发明申请

WO2002069493A2 AUTOMATIC FREQUENCY CONTROL SYSTEMS AND METHODS FOR JOINT DEMODULATION 审中-公开
标题翻译：自动频率控制系统和联合解调方法
公开(公告)号：WO2002069493A2
公开(公告)日：2002-09-06
申请号：PCT/US2001/046721
申请日：2001-10-19
申请人： ERICSSON INC , MOLNAR, Karl, J. , HAFEEZ, Abdulrauf , ARSLAN, Huseyin
发明人： HAFEEZ, Abdulrauf , ARSLAN, Huseyin
IPC分类号： H03J7/04
CPC分类号： H03J7/04 , H04L25/0204 , H04L25/03331 , H04L25/03337
摘要： A joint demodulator is configured to generate an estimated first frequency or first frequency error for the first signal and an estimated second frequency or second frequency error for the second signal. A first long-term automatic frequency control is responsive to the estimated first frequency or first frequency error, wherein the joint demodulator is responsive to the first long-term automatic frequency control. A second long-term automatic frequency control is responsive to the estimated second frequency or second frequency error, wherein the joint demodulator is responsive to the second long-term automatic frequency control. First and second local automatic frequency controls also may be included in the joint demodulator, wherein the first long-term automatic frequency control is responsive to the first local automatic frequency control and the second-long-term automatic frequency control is responsive to the second local automatic frequency control. The first long-term automatic frequency control and the second long-term automatic frequency control can produce respective first and second frequency offset signals that are applied to the joint demodulator. Alternatively, a difference between the first and second frequency offsets is applied to the joint demodulator and the first frequency offset is applied to a downconverter that downconverts the jointly received first and second signals and provides the downconverted signals to the joint demodulator.
摘要翻译：联合解调器被配置为产生用于第一信号的估计的第一频率或第一频率误差以及用于第二信号的估计的第二频率或第二频率误差。第一长期自动频率控制响应于估计的第一频率或第一频率误差，其中联合解调器响应于第一长期自动频率控制。第二长期自动频率控制响应于估计的第二频率或第二频率误差，其中联合解调器响应于第二长期自动频率控制。第一和第二局部自动频率控制也可以包括在联合解调器中，其中第一长期自动频率控制响应于第一局部自动频率控制，而第二长期自动频率控制响应于第二局部自动频率控制自动频率控制。第一长期自动频率控制和第二长期自动频率控制可以产生施加到联合解调器的相应的第一和第二频偏信号。或者，将第一和第二频率偏移之间的差施加到联合解调器，并且第一频率偏移被施加到下变频器，其下变频共同接收的第一和第二信号，并将下变频信号提供给联合解调器。

3. 发明申请

WO2006136875A1 SYSTEM AND METHOD OF JOINT SYNCHRONIZATION AND NOISE COVARIANCE ESTIMATION 审中-公开
标题翻译：联合同步和噪声协方差估计的系统与方法
公开(公告)号：WO2006136875A1
公开(公告)日：2006-12-28
申请号：PCT/IB2005/002149
申请日：2005-06-24
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , HUI, Dennis , HAFEEZ, Abdulrauf
发明人： HUI, Dennis , HAFEEZ, Abdulrauf
IPC分类号： H04L25/02 , H04B7/26 , H04J3/06
CPC分类号： H04L25/0204 , H04L7/041 , H04L25/0212 , H04L25/0224 , H04L25/0244 , H04L25/03993
摘要： A system and method in a radio receiver for joint synchronization and noise covariance estimation of a received signal. A spatially and temporally stacked signal model, whereby successive samples of temporally adjacent received signal vectors and corresponding training vectors are stacked, is used in the derivation of the estimation problem. The Toeplitz structure of the channel response matrix is neglected in the formulation of the estimation problem. The resulting estimator jointly estimates a synchronisation position, a channel response matrix and a noise covariance matrix. An estimate of a whitened channel is then computed (step 15) based on the noise covariance matrix and the estimate of the channel response matrix.
摘要翻译：用于接收信号的联合同步和噪声协方差估计的无线电接收机中的系统和方法。空间和时间叠加的信号模型，其中叠加时间上相邻的接收信号矢量和对应的训练矢量的连续样本，用于估计问题的推导。在估计问题的形成中忽略了通道响应矩阵的Toeplitz结构。所得到的估计器共同估计同步位置，信道响应矩阵和噪声协方差矩阵。然后基于噪声协方差矩阵和信道响应矩阵的估计来计算白化信道的估计（步骤15）。

4. 发明申请

WO2010143148A1 NETWORK-CENTRIC LINK ADAPTATION FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSION 审中-公开
标题翻译：网络中心链路适配协调多点下行链路传输
公开(公告)号：WO2010143148A1
公开(公告)日：2010-12-16
申请号：PCT/IB2010/052575
申请日：2010-06-09
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , ZANGI, Kambiz , HAFEEZ, Abdulrauf , HUI, Dennis
发明人： ZANGI, Kambiz , HAFEEZ, Abdulrauf , HUI, Dennis
IPC分类号： H04L1/00
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 Sink 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 intex-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 mi 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）执行基于网络的中继适配。 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接收到由其他CoMP小区的传输引起的CoMP间干扰小区干扰的报告。基于下行链路信道质量，期望信号，CoMP内小区干扰，内部CoMP小区干扰和热噪声，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）。

5. 发明申请

WO2007000620A1 METHOD AND DEVICE FOR SYNCHRONIZATION AND CHANNEL ESTIMATION IN A RADIO RECEIVER 审中-公开
标题翻译：用于无线接收机同步和信道估计的方法和设备
公开(公告)号：WO2007000620A1
公开(公告)日：2007-01-04
申请号：PCT/IB2005/001840
申请日：2005-06-28
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , HUI, Dennis , HAFEEZ, Abdulrauf
发明人： HUI, Dennis , HAFEEZ, Abdulrauf
IPC分类号： H04L25/02
CPC分类号： H04L25/0212 , H04L25/0224
摘要： A device and method in a radio receiver for generating synchronization and channel estimation information based on three parameters consisting of a synchronization position, at least one whitening filter parameter, and a channel estimate. A spatially and temporally stacked signal model is generated by stacking (11) successive samples of temporally adjacent received signal vectors and corresponding training vectors. Initial estimates of a first one or two of the three parameters are then generated (12) based on the spatially and temporally stacked signal model. The rest of the three parameters are then computed (13-16) based on the initial estimates of the first one or two parameters. If a stopping criterion is met (17), the method ends (18) and the parameters are used to process the signal. If the stopping criterion is not met, additional iterations (13-16) are performed to improve the synchronization and estimation information.
摘要翻译：一种无线电接收机中的装置和方法，用于基于由同步位置，至少一个白化滤波器参数和信道估计组成的三个参数来产生同步和信道估计信息。通过堆叠（11）时间相邻的接收信号向量和对应的训练向量的连续采样来生成空间和时间叠加的信号模型。然后基于空间和时间叠加的信号模型生成（12）第一或第二参数的初始估计。然后根据第一个或两个参数的初始估计，计算三个参数中的其余部分（13-16）。如果满足停止标准（17），则方法结束（18），并且使用参数来处理信号。如果不满足停止标准，则执行附加迭代（13-16）以改善同步和估计信息。

6. 发明申请

WO2006034813A1 ITERATIVE FORWARD-BACKWARD PARAMETER ESTIMATION 审中-公开
标题翻译：迭代前向参数估计
公开(公告)号：WO2006034813A1
公开(公告)日：2006-04-06
申请号：PCT/EP2005/010244
申请日：2005-09-22
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , HAFEEZ, Abdulrauf
发明人： HAFEEZ, Abdulrauf
IPC分类号： H04L25/03
CPC分类号： H04L25/03337 , H04L25/0206 , H04L25/03292 , H04L25/03305
摘要： A method and apparatus for jointly estimating channels used to propagate desired and interfering signals received by a wireless receiver. A blind parameter estimator in the wireless receiver includes a forward parameter estimator and a backward parameter estimator that each include an equalizer and a channel estimator for generating forward and backward channel estimates, respectively, for the desired and interfering signal channels. In one embodiment, the blind parameter estimator includes independent forward and backward parameter estimators adapted to generate independent forward and backward channel estimates, respectively, where a final channel selector is adapted to select the final channel estimates based on a comparison between error metrics associated with the forward and backward channel estimates. In another embodiment, the blind parameter estimator includes serial per-survivor processing forward and backward parameter estimators adapted to use the backward channel estimates as the final channel estimates for the desired and interfering signal channels.
摘要翻译：一种用于联合估计用于传播由无线接收机接收的期望信号和干扰信号的信道的方法和装置。无线接收机中的盲参数估计器包括前向参数估计器和反向参数估计器，每个前向参数估计器和反向参数估计器分别包括均衡器和信道估计器，用于分别为期望的和干扰的信号信道产生正向和反向信道估计。在一个实施例中，盲参数估计器包括独立的前向和后向参数估计器，其分别适于产生独立的前向和后向信道估计，其中最终信道选择器适于基于与前进和后退渠道估计。在另一个实施例中，盲参数估计器包括串行每幸存者处理前向和后向参数估计器，其适于使用反向信道估计作为期望信号和干扰信号信道的最终信道估计。

7. 发明申请

WO2002065719A1 ESTIMATION AND COMPENSATION OF THE IMPULSE RESPONSE OF THE PULSE-SHAPING FILTER IN A WIRELESS TERMINAL 审中-公开
标题翻译：脉冲形状滤波器在无线终端中的脉冲响应的估计和补偿
公开(公告)号：WO2002065719A1
公开(公告)日：2002-08-22
申请号：PCT/US2002/001121
申请日：2002-01-16
申请人： ERICSSON, INC. , HAFEEZ, Abdulrauf , MOLNAR, James Karl
发明人： HAFEEZ, Abdulrauf , MOLNAR, James Karl
IPC分类号： H04L25/02
CPC分类号： H04L25/03006 , H04L25/0202 , H04L25/03993 , H04L2025/03617 , H04L2025/03624
摘要： A pulse-shape estimator calculates an impulse response for the trasmit and receive pulse-shaping filters in a mobile wireless terminal. The pulse-shape estimator receives a training signal that has passed through the pulse-shaping filters and known training symbols. Based on the actual received signal containing the training symbols and the expected received signal, the pulse-shape estimator estimates the impulse response of the pulse-shaping filters. The calculated impulse response may be used to improve signal demodulation or to calculate the coefficients for a digital filter applied before demodulation to compensate for pulse-shape distortion.
摘要翻译：脉冲形状估计器计算移动无线终端中的trasmit和接收脉冲整形滤波器的脉冲响应。脉冲形状估计器接收通过脉冲整形滤波器和已知训练符号的训练信号。基于包含训练符号和预期接收信号的实际接收信号，脉冲形状估计器估计脉冲整形滤波器的脉冲响应。计算的脉冲响应可用于改善信号解调或计算在解调之前应用的数字滤波器的系数以补偿脉冲形状失真。

8. 发明申请

WO2010076633A1 COORDINATED MULTIPOINT WIRELESS COMMUNICATION 审中-公开
标题翻译：协调多点无线通信
公开(公告)号：WO2010076633A1
公开(公告)日：2010-07-08
申请号：PCT/IB2009/007871
申请日：2009-12-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HAFEEZ, Abdulrauf , GUEY, Jiann-Ching , PETERSSON, Sven, Oscar , ZANGI, Kambiz, Casey
发明人： HAFEEZ, Abdulrauf , GUEY, Jiann-Ching , PETERSSON, Sven, Oscar , ZANGI, Kambiz, Casey
IPC分类号： H04W16/02
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。

9. 发明申请

WO2011099970A1 METHOD AND ARRANGEMENT IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：无线通信系统中的方法和布置
公开(公告)号：WO2011099970A1
公开(公告)日：2011-08-18
申请号：PCT/US2010/023857
申请日：2010-02-11
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , HU, Yang , GAN, Jiansong , HAFEEZ, Abdulrauf
发明人： HU, Yang , GAN, Jiansong , HAFEEZ, Abdulrauf
IPC分类号： H04W24/00
CPC分类号： H04W24/02 , G01S5/04 , H04W64/006
摘要： Method and arrangement in a first base station for calculating a first location parameter α of a user equipment in order to improve beamforming accuracy. The first base station and the user equipment are comprised in a Coordinated Multiple Point "CoMP" communication system together with a second base station. The method comprises measuring a signal received from the user equipment, estimating a first parameter value α' based on the measured signal, obtaining a second parameter value α", based on an estimated second location parameter β of the user equipment, estimated at the second base station and calculating the first location parameter α, based on the first estimated parameter value α' and the obtained second parameter value α''.
摘要翻译：在第一基站中用于计算用户设备的第一位置参数a以便提高波束成形精度的方法和布置。第一基站和用户设备与第二基站一起包括在协调多点“CoMP”通信系统中。该方法包括：测量从用户设备接收到的信号，基于在第二个估计的用户设备的估计的第二位置参数β来估计基于测量信号的第一参数值a'，获得第二参数值a“ 并且基于第一估计参数值a'和获得的第二参数值a“计算第一位置参数a。

10. 发明申请

WO2011077320A2 RATE ALLOCATION SCHEME FOR COORDINATED MULTIPOINT TRANSMISSION 审中-公开
标题翻译：协调多点传输速率分配方案
公开(公告)号：WO2011077320A2
公开(公告)日：2011-06-30
申请号：PCT/IB2010/055823
申请日：2010-12-15
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , HAFEEZ, Abdulrauf
发明人： HAFEEZ, Abdulrauf
CPC分类号： H04B7/0452 , H04B7/024 , H04B7/0617 , H04W72/082
摘要： In a communication system transmitting from multiple antennas to multiple users, data transmission rates are allocated over scheduled users by varying the weights assigned to the users. The user weights determine the transmission preceding vectors used for the transmissions, which determine the data rates. In one embodiment, a set of predetermined weights is selected from a plurality of sets of weights as the one maximizing the sum, over all scheduled users, of the ratio of each user's instantaneous data rate to the average rale over prior frames. In another embodiment, the weights, preceding vectors, and data rates are frequency-specific. In another embodiment, the user weights arc determined through an iterative process of assigning initial weights, determining the precoding vectors associated with the weights, determining the channel conditions for transmission using the determined preceding vectors, and adjusting the user weights based on their relative channel conditions.
摘要翻译：在从多个天线发送到多个用户的通信系统中，通过改变分配给用户的权重，通过调度的用户分配数据传输速率。用户权重确定用于确定数据速率的用于传输的先前向量的传输。在一个实施例中，从多个权重集合中选择一组预定权重，作为在所有调度用户上将每个用户的瞬时数据速率与先前帧之间的平均rale的比率最大化的权重集合。在另一个实施例中，权重，前向量和数据速率是频率特定的。在另一个实施例中，通过分配初始权重的迭代过程确定用户权重，确定与权重相关联的预编码向量，使用所确定的先前向量确定用于传输的信道条件，以及基于它们的相对信道条件来调整用户权重。

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