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1. 发明申请

WO2007136933A1 METHOD AND APPARATUS FOR PERFORMING STREAM WEIGHTING IN AN SDMA COMMUNICATION SYSTEM 审中-公开
标题翻译：用于在SDMA通信系统中执行流加权的方法和装置
公开(公告)号：WO2007136933A1
公开(公告)日：2007-11-29
申请号：PCT/US2007/065835
申请日：2007-04-03
申请人： MOTOROLA, INC. , THOMAS, Timothy A., , VOOK, Frederick W.,
发明人： THOMAS, Timothy A., , VOOK, Frederick W.,
IPC分类号： H04B7/06 , H04Q7/36
CPC分类号： H04B7/0617 , H04B7/0697
摘要： A method and apparatus for performing stream weighting in a spatial-division multiple access communication system is provided herein. During operation the base station receiver receives channel information from mobiles (also known as users or nodes) and calculates transmit antenna weights that maximize the power delivered to each mobile while allowing for a small amount of crosstalk to exist between users. Information or data is transmitted to the nodes utilizing the appropriate stream weights. By allowing tolerable amounts of cross talk, the coherent gain to the desired SDMA user can be increased, and thus the overall performance is improved.
摘要翻译：本文提供了一种在空分多址通信系统中执行流加权的方法和装置。在操作期间，基站接收机从移动台（也称为用户或节点）接收信道信息，并且计算发送天线权重，其最大化传送到每个移动台的功率，同时允许在用户之间存在少量串扰。使用适当的流权重将信息或数据传送到节点。通过允许容忍量的串扰，可以增加对期望的SDMA用户的相干增益，从而提高整体性能。

2. 发明申请

WO2004077709A2 METHOD AND APPARATUS FOR REDUCING INTERFERENCE WITHIN A COMMUNICATION SYSTEM 审中-公开
标题翻译：用于减少通信系统干扰的方法和装置
公开(公告)号：WO2004077709A2
公开(公告)日：2004-09-10
申请号：PCT/US2004/004105
申请日：2004-02-12
申请人： MOTOROLA INC. A CORPORATION OF THE STATE OF DELAWARE , THOMAS, Timothy A., , VOOK, Frederick W.,
发明人： THOMAS, Timothy A., , VOOK, Frederick W.,
IPC分类号： H04J
CPC分类号： H04B7/0854 , H04L27/2607 , H04L27/2647
摘要： A method for reducing interference within a communication system is provided herein. The method comprising the steps of receiving a signal y( n ), where y( n ) comprises a desired signal, s( n ), and a co-channel interfering signal, i( n ), wherein s(n) and i( n ) are not time-synchronized, converting y( n ) into a frequency-domain signal Y( k ), calculating a weight vector W( k ), wherein W( k ) is based on s( n ) and i( n ), and additionally based on a time offset T existing between s( n ) and i( n ), and applying W( k ) to Y( k ) in order to equalize the desired signal, s( n ), and reduce co-channel interference i( n ).
摘要翻译：本文提供了一种用于减少通信系统内的干扰的方法。该方法包括以下步骤：接收信号y（n），其中y（n）包括期望信号s（n）以及同信道干扰信号i（n），其中s（n）和i（ n）不是时间同步的，将y（n）转换成频域信号Y（k），计算加权矢量W（k），其中W（k）基于s（n）和i（n）并且另外基于存在于s（n）和i（n）之间的时间偏移T，并且将W（k）应用于Y（k）以便均衡期望信号s（n），并且减少同频道干扰i（n）。

3. 发明申请

WO2008094770A1 METHOD AND APPARATUS FOR FINITE IMPULSE RESPONSE CYCLIC-SHIFT DIVERSITY 审中-公开
标题翻译：用于有限脉冲响应循环移位分集的方法和设备
公开(公告)号：WO2008094770A1
公开(公告)日：2008-08-07
申请号：PCT/US2008/051281
申请日：2008-01-17
申请人： MOTOROLA, INC. , HILLERY, William J., , KRAUSS, Thomas P., , MONDAL, Bishwarup, , THOMAS, Timothy A., , VOOK, Frederick W.,
发明人： HILLERY, William J., , KRAUSS, Thomas P., , MONDAL, Bishwarup, , THOMAS, Timothy A., , VOOK, Frederick W.,
IPC分类号： H04L1/02 , H04B7/26 , H04B7/06
CPC分类号： H04L5/0007 , H04B7/0671
摘要： A generalized form of cyclic shift diversity is described for use in an OFDM system with multiple transmit antennas. Multiple cyclic shifts are performed for each transmit antenna and the shifted signals are scaled and summed to form a time-domain data stream for each transmit antenna. A cyclic extension is added to each data stream prior to transmission.
摘要翻译：描述了用于具有多个发射天线的OFDM系统中的循环移位分集的一般形式。对每个发射天线执行多个循环移位，并对移位的信号进行缩放和求和以形成每个发射天线的时域数据流。在传输之前，将循环扩展添加到每个数据流中。

4. 发明申请

WO2005029754A3 METHOD AND APPARATUS FOR REDUCING INTERFERENCE WITHIN A COMMUNICATION SYSTEM 审中-公开
公开(公告)号：WO2005029754A3
公开(公告)日：2005-03-31
申请号：PCT/US2004/030717
申请日：2004-09-17
申请人： MOTOROLA, INC. , A CORPORATION OF THE STATE OF DELAWARE , THOMAS, Timothy A., , VOOK, Frederick W.,
发明人： THOMAS, Timothy A., , VOOK, Frederick W.,
IPC分类号： H03D1/04
摘要： A method for reducing interference within a communication system is provided herein. A receiver (100), and method for operating a receiver are provided. The receiver operates by utilizing a filter bank (103-104) to partition a wide-band signal into smaller sub-bands. Interference suppression takes place individually on the sub-bands (frequency bands) instead of on the wideband signal as a whole. By using interference suppression on smaller sub-bands, interference suppression techniques can be utilized with less computational complexity than when performing interference suppression on the broadband signal as a whole.

5. 发明申请

WO2011130192A3 MANIFOLD CALIBRATION FOR A COMMUNICATION SYSTEM 审中-公开
公开(公告)号：WO2011130192A3
公开(公告)日：2011-10-20
申请号：PCT/US2011/032011
申请日：2011-04-12
申请人： MOTOROLA MOBILITY, INC. , THOMAS, Timothy A., , VOOK, Frederick W.,
发明人： THOMAS, Timothy A., , VOOK, Frederick W.,
IPC分类号： H04B17/00 , H04B7/06 , H04B7/08 , H01Q3/26
摘要： A method and apparatus for determining stream weights is provided herein. During operation, an uplink direction of arrival (DOA) and a downlink direction of departure (DOD) calibration procedure is implemented using uplink signals and GPS information from a subset of mobiles without the need of calibration circuitry at the base. Because the presented calibration procedure needs no new hardware it can be deployed in existing deployments with only a soft-ware upgrade.

6. 发明申请

WO2008144189A2 METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 审中-公开
标题翻译：封闭环路发射反馈的方法与装置
公开(公告)号：WO2008144189A2
公开(公告)日：2008-11-27
申请号：PCT/US2008/062211
申请日：2008-05-01
申请人： MOTOROLA, INC. , MONDAL, Bishwarup, , HARRISON, Robert M., , THOMAS, Timothy A.,
发明人： MONDAL, Bishwarup, , HARRISON, Robert M., , THOMAS, Timothy A.,
IPC分类号： H04B7/04
CPC分类号： H04B7/0417 , H04B7/0465 , H04B7/063 , H04B7/0634 , H04B7/0639 , H04B7/066
摘要： A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step (900) of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step (902) includes measuring a composite channel between the transmitter and receiver. A next step (904) includes determining at least one performance metric for each set of weightings in the codebook. A next step (906) includes selecting preferred weightings for each data stream in response to the performance metrics. A next step (908) includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.
摘要翻译：描述了一种用于提供用于具有多个发射和接收天线的闭环发射的反馈的装置的方法。该方法包括第一步骤（900），其提供包含多个发射天线的每个数据流的加权集合的码本，其中每个集合由发射机和接收机已知的索引识别。相同的码本被用于直到发射天线数量的任何数量的数据流。下一步骤（902）包括测量发射机和接收机之间的复合信道。下一步骤（904）包括为码本中的每个权重集合确定至少一个性能度量。下一步骤（906）包括响应于性能度量为每个数据流选择优选权重。下一步骤（908）包括将优先权重的索引反馈到发射机用于随后的传输。

7. 发明申请

WO2011087886A1 METHOD AND APPARATUS FOR PILOT SIGNAL PROCESSING IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：无线通信系统中的引导信号处理方法与装置
公开(公告)号：WO2011087886A1
公开(公告)日：2011-07-21
申请号：PCT/US2010/062461
申请日：2010-12-30
申请人： MOTOROLA MOBILITY, INC. , THOMAS, Timothy A., , MONDAL, Bishwarup,
发明人： THOMAS, Timothy A., , MONDAL, Bishwarup,
IPC分类号： H04B1/707 , H04J13/16 , H04J13/00
CPC分类号： H04B1/7097 , H04B1/7075 , H04B2201/70701 , H04B2201/709709 , H04J13/0062 , H04J13/16 , H04L5/0023 , H04L5/0026 , H04L5/0048 , H04L27/2611
摘要： A wireless communication system (100) is provided that spreads pilot signals, or channel state information reference signals (CSI-RSs), using a spreading code chosen from a set of mutually unbiased bases (MUBs). The advantages of such spreading with MUBs are that multiple base stations (110, 120) can send their pilot signals on a same time-frequency resources, making the pilot signal design very efficient and also improving channel estimation at a user equipment (102, 103) through orthogonal and quasi-orthogonal spreading which gives a gain above noise and interference. A short spreading code chosen from MUBs may be used for spreading pilot signals transmitted from each antenna of a base station within a time-frequency resource comprising multiple closely-spaced subcarriers in frequency and/or multiple closely-spaced symbols in time.
摘要翻译：提供了一种使用从一组相互无偏置的基座（MUB）中选择的扩展码扩展导频信号或信道状态信息参考信号（CSI-RS）的无线通信系统（100）。 MUB这种扩展的优点在于，多个基站（110,120）可以在相同的时间 - 频率资源上发送其导频信号，使得导频信号设计非常有效，并且还改善用户设备（102,103）处的信道估计）通过正交和准正交扩展，其产生高于噪声和干扰的增益。从MUB中选择的短扩展码可以用于在频率和/或多个紧密间隔的符号中包括多个紧密间隔的子载波的时间频率资源内扩频从基站的每个天线发送的导频信号。

8. 发明申请

WO2011084373A1 CLOSED-LOOP TRANSMISSION FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
标题翻译：无线通信系统中的闭环传输反馈
公开(公告)号：WO2011084373A1
公开(公告)日：2011-07-14
申请号：PCT/US2010/060020
申请日：2010-12-13
申请人： MOTOROLA MOBILITY, INC. , THOMAS, Timothy A., , MONDAL, Bishwarup,
发明人： THOMAS, Timothy A., , MONDAL, Bishwarup,
IPC分类号： H04L25/02 , H04L25/03 , H04B7/04 , H04B7/06
CPC分类号： H04B7/0417 , H04B7/063 , H04B7/0634 , H04B7/0639 , H04L5/0023 , H04L5/0091 , H04L25/0204 , H04L25/03343 , H04L2025/03426
摘要： A method and apparatus for providing channel feedback is provided herein. During operation a covahance matrix R at time t is calculated by a mobile station as a function of a received downlink signal. In order to reduce overhead, R is normalized and quantized by the mobile station using multiple codebook entries plus at least one constant for quantization. The mobile station then transmits the normalized and quantized covariance matrix back to a base station as bit values indicating the selected entries from the codebook plus bit values corresponding to the at least one constant. The base unit then uses the covariance matrix estimate to determine appropriate channel beamforming weights, and instructs transmit beamforming circuitry to use the appropriate weights.
摘要翻译：本文提供了一种用于提供信道反馈的方法和装置。在运行期间，时间t的协变矩阵R由移动台根据接收到的下行链路信号来计算。为了减少开销，R由移动站使用多个码本条目加上至少一个用于量化的常数进行归一化和量化。然后，移动站将归一化和量化的协方差矩阵发送回基站，作为指示来自码本的选定条目的比特值加上与至少一个常数对应的比特值。基本单元然后使用协方差矩阵估计来确定适当的信道波束成形权重，并且指示发送波束成形电路使用适当的权重。

9. 发明申请

WO2003058864A1 FREQUENCY-DOMAIN MIMO PROCESSING METHOD AND SYSTEM 审中-公开
标题翻译：频域MIMO处理方法与系统
公开(公告)号：WO2003058864A1
公开(公告)日：2003-07-17
申请号：PCT/US2002/039021
申请日：2002-11-21
申请人： MOTOROLA, INC., A CORPORATION OF THE STATE OF DELAWARE
发明人： VOOK, Frederick W., , THOMAS, Timothy A.,
IPC分类号： H04J11/00
CPC分类号： H04L25/03159 , H04B7/0413 , H04L2025/03382 , H04L2025/03522
摘要： A communication system based upon frequency-domain MIMO processing is disclosed. A transmitting device (20) of the communication system transforms time-domain signals (S1-3 [M]) into frequency-domain signals (S1-3 [K]) , and weights (22) each frequency-domain signal to form weighted frequency-domain signals (X1-3 [K]) with each weighted frequency-domain signal (X1-3 [K]) being a function of each frequency-domain signal. The transmitting device (20) transmits weighted time-domain waveforms as a function of the weighted frequency-domain signals (X1-3 [K]) . In response thereto, a receiving device of the communication system provides frequency-domain samples that are a function of the one or more weighted time-domain waveforms and weights each frequency-domain sample to form one or more weighted frequency-domain samples with each weighted frequency-domain sample being a function of each frequency-domain sample. The receiving device decodes the weighted frequency-domain sample to obtain the information represented by the time-domain signals.
摘要翻译：公开了一种基于频域MIMO处理的通信系统。通信系统的发送装置20将时域信号S1-3 [M]变换为频域信号S1-3 [K]，并对每个频域信号进行加权，形成加权的频域信号X1-3 [ K]，每个加权频域信号X1-3 [K]是每个频域信号的函数。发送装置20根据加权的频域信号X1-3 [K]发送加权的时域波形。响应于此，通信系统的接收装置提供作为一个或多个加权时域波形的函数的频域采样，并对每个频域采样进行加权，以形成一个或多个加权频域样本，频域样本是每个频域样本的函数。接收设备对加权的频域样本进行解码以获得由时域信号表示的信息。

10. 发明公开

EP2036217A1 METHOD AND APPARATUS FOR PERFORMING STREAM WEIGHTING IN AN SDMA COMMUNICATION SYSTEM 有权转让
标题翻译：方法和设备，用于执行STREAM-WEIGHT IN A SDMA通信系统
公开(公告)号：EP2036217A1
公开(公告)日：2009-03-18
申请号：EP07760002.1
申请日：2007-04-03
申请人： Motorola, Inc.
发明人： THOMAS, Timothy A., , VOOK, Frederick W.,
IPC分类号： H04B7/06 , H04Q7/36
CPC分类号： H04B7/0617 , H04B7/0697
摘要： A method and apparatus for performing stream weighting in a spatial-division multiple access communication system is provided herein. During operation the base station receiver receives channel information from mobiles (also known as users or nodes) and calculates transmit antenna weights that maximize the power delivered to each mobile while allowing for a small amount of crosstalk to exist between users. Information or data is transmitted to the nodes utilizing the appropriate stream weights. By allowing tolerable amounts of cross talk, the coherent gain to the desired SDMA user can be increased, and thus the overall performance is improved.

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