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21. 发明授权

US07778343B2 Method and apparatus for finite impulse response cyclic-shift diversity 有权
标题翻译：有限脉冲响应循环移位分集的方法和装置
公开(公告)号：US07778343B2
公开(公告)日：2010-08-17
申请号：US11627563
申请日：2007-01-26
申请人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
发明人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04B7/02 , H04L1/02
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：描述了在具有多个发射天线的OFDM系统中使用的循环移位分集的通用形式。对于每个发射天线执行多个循环移位，并且移位的信号被缩放和相加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。

22. 发明授权

US06504506B1 Method and device for fixed in time adaptive antenna combining weights 失效
标题翻译：固定时间自适应天线组合权重的方法和装置
公开(公告)号：US06504506B1
公开(公告)日：2003-01-07
申请号：US09607733
申请日：2000-06-30
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： G01S328
CPC分类号： H04B7/01 , H04B7/0848
摘要： A receiving device and method for operating a communication system are provided. The receiving device receives at least one Doppler channel estimate for at least one transmitter and a spatial covariance matrix of a corrupting environment. The Doppler channel estimates are used to create a Null Doppler spatial covariance matrix. A total Doppler spatial covariance matrix is created as a sum of the spatial covariance matrix of the corrupting environment, plus the Doppler spatial covariance matrix. A combining weight for at least one transmitter and at least one Doppler channel is created from the total Doppler spatial covariance and the at least one Doppler channel for the at least one transmitter.
摘要翻译：提供了一种用于操作通信系统的接收设备和方法。接收设备接收至少一个发射机的多普勒信道估计和破坏环境的空间协方差矩阵。多普勒频道估计用于创建空多普勒空间协方差矩阵。创建总多普勒空间协方差矩阵作为腐蚀环境的空间协方差矩阵加上多普勒空间协方差矩阵的和。用于至少一个发射机和至少一个多普勒信道的组合权重由所述至少一个发射机的总多普勒空间协方差和所述至少一个多普勒频道创建。

23. 发明授权

US07864657B2 Method and apparatus for performing stream weighting in an SDMA communication system 有权
标题翻译：在SDMA通信系统中执行流加权的方法和装置
公开(公告)号：US07864657B2
公开(公告)日：2011-01-04
申请号：US11419856
申请日：2006-05-23
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04J3/10
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 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，并且计算发射天线权重，其使输送到每个移动台的功率最大化，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。

24. 发明授权

US07221722B2 Method and apparatus for reducing interference within a communication system 有权
标题翻译：用于减少通信系统内的干扰的方法和装置
公开(公告)号：US07221722B2
公开(公告)日：2007-05-22
申请号：US10375438
申请日：2003-02-27
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H03D1/04
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）。

25. 发明授权

US06996197B2 Method and apparatus for reducing interference within a communication system 有权
标题翻译：用于减少通信系统内的干扰的方法和装置
公开(公告)号：US06996197B2
公开(公告)日：2006-02-07
申请号：US10919198
申请日：2004-08-16
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H04B1/10 , H04L25/08
CPC分类号： H04B1/126 , H04B1/10
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.
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。提供接收机（100）和操作接收机的方法。接收机通过利用滤波器组（103-104）来操作，以将宽带信号划分成更小的子带。干扰抑制单独在子带（频带）上进行，而不是作为整体在宽带信号上进行。通过对较小的子带使用干扰抑制，可以比在宽带信号整体上进行干扰抑制时更少的计算复杂度来利用干扰抑制技术。

26. 发明授权

US06826240B1 Method and device for multi-user channel estimation 有权
标题翻译：用于多用户信道估计的方法和装置
公开(公告)号：US06826240B1
公开(公告)日：2004-11-30
申请号：US09526003
申请日：2000-03-15
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04L2706
CPC分类号： H04L25/0204 , H04L25/022 , H04L25/0224
摘要： A receiving device and method for operating a communication system is provided. The receiving device receives a predetermined pilot sequence. The received pilot sequence is converted into at least one frequency domain pilot sequence. A plurality of time invariant channel estimates are determined from the frequency domain pilot sequence. The pilot sequence may include a null cyclic prefix. A time variant channel estimate may be determined from the time invariant channel estimates.
摘要翻译：提供了一种用于操作通信系统的接收设备和方法。接收装置接收预定的导频序列。所接收的导频序列被转换成至少一个频域导频序列。从频域导频序列确定多个时间不变信道估计。导频序列可以包括空循环前缀。可以从时间不变信道估计来确定时变信道估计。

27. 发明授权

US06362781B1 Method and device for adaptive antenna combining weights 失效
标题翻译：自适应天线组合权重的方法和装置
公开(公告)号：US06362781B1
公开(公告)日：2002-03-26
申请号：US09607736
申请日：2000-06-30
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： G01S328
CPC分类号： H04B7/0854 , H04B7/01
摘要： A receiving device and method for operating a communication system are provided. The receiving device receives a plurality of time-domain Doppler channel estimates for at least one transmitter, a plurality of Doppler sinusoids, and a spatial covariance matrix of a corrupting environment. A Doppler spatial covariance matrix is created as a function of the time-domain Doppler channel estimates and the Doppler sinusoids. A total Doppler spatial covariance matrix is created as a function of the spatial covariance matrix of the corrupting environment and the Doppler spatial covariance matrix. A Doppler steering vector is created for at least one transmitter as a function of the Doppler channel estimates and the Doppler sinusoids. A combining weight for the at least one transmitter is then created as a function of the total Doppler spatial covariance matrix and the Doppler steering vector for at least one transmitter.
摘要翻译：提供了一种用于操作通信系统的接收设备和方法。接收设备接收对于至少一个发射机，多个多普勒正弦波和破坏环境的空间协方差矩阵的多个时域多普勒信道估计。多普勒空间协方差矩阵作为时域多普勒信道估计和多普勒正弦曲线的函数产生。根据破坏环境和多普勒空间协方差矩阵的空间协方差矩阵，创建总多普勒空间协方差矩阵。根据多普勒信道估计和多普勒正弦曲线，为至少一个发射机创建多普勒导引矢量。然后，至少一个发射机的组合权重作为至少一个发射机的总多普勒空间协方差矩阵和多普勒导引矢量的函数被创建。

28. 发明授权

US08537790B2 Hierarchical pilot structure in wireless communication systems 有权
标题翻译：无线通信系统中的分层导频结构
公开(公告)号：US08537790B2
公开(公告)日：2013-09-17
申请号：US12367483
申请日：2009-02-06
申请人： Mark C. Cudak , Timothy A. Thomas , Frederick W. Vook , Anup K. Talukdar , Fan Wang , Bishwarup Mondal
发明人： Mark C. Cudak , Timothy A. Thomas , Frederick W. Vook , Anup K. Talukdar , Fan Wang , Bishwarup Mondal
IPC分类号： H04W4/00
CPC分类号： H04L5/0007 , H04L1/06 , H04L5/005 , H04L5/0051 , H04L5/0053 , H04L25/03248
摘要： A method for communicating control channel information in a wireless communication system, including transmitting a super-frame having a time-frequency resource region containing an allocation control channel and multiple pilot elements, at least some of which are associated with the allocation control channel, and indicating, in a configuration information control channel of the super-frame, a characteristic of the pilots elements associated with the allocation control channel.
摘要翻译：一种用于在无线通信系统中传送控制信道信息的方法，包括发送具有包含分配控制信道的时间 - 频率资源区域和多个导频元素的超帧，其中至少一些与分配控制信道相关联，以及在超帧的配置信息控制信道中指示与分配控制信道相关联的导频元素的特性。

29. 发明申请

US20110254736A1 MANIFOLD CALIBRATION FOR A COMMUNICATION SYSTEM 有权
标题翻译：通信系统的标记校准
公开(公告)号：US20110254736A1
公开(公告)日：2011-10-20
申请号：US12759872
申请日：2010-04-14
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： G01S5/02
CPC分类号： H04B7/086 , H04B7/0617 , H04B17/10 , H04B17/21
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.
摘要翻译：本文提供了一种用于确定流权重的方法和装置。在操作期间，使用来自移动台的子集的上行链路信号和GPS信息来实现上行链路方向（DOA）和下行链路出发方向（DOD）校准过程，而不需要基地的校准电路。由于所提供的校准过程不需要新的硬件，因此可以仅在软件升级中部署在现有部署中。

30. 发明授权

US06765969B1 Method and device for multi-user channel estimation 有权
标题翻译：用于多用户信道估计的方法和装置
公开(公告)号：US06765969B1
公开(公告)日：2004-07-20
申请号：US09643541
申请日：2000-08-22
申请人： Frederick W. Vook , Timothy A. Thomas
发明人： Frederick W. Vook , Timothy A. Thomas
IPC分类号： H04L2700
CPC分类号： H04L25/022 , H04L1/06 , H04L25/0206 , H04L25/0224
摘要： The invention computes frequency-domain channel gains by compiling a set of estimated channel gains as a function of pilot sequences, a set of analytical channel gains variables, and a set of weighting coefficients variables. A plurality of weighting coefficients are computed as a function of time and frequency correlation functions, a noise correlation matrix, and pilot sequences. A weighting matrix is computed from the weighting coefficients. After receiving a training sequence from at least one transmitter, a received data matrix is computed from the training sequence. The weighting matrix and the received data matrix are used to compute the frequency-domain channel gains. The invention also provides a method for reducing the computational complexity of estimating the time and frequency response of at least one desired signal received by at least one antenna. Also, the time and frequency response of at least one desired signal received by at least one antenna can be both interpolated and predicted with the present invention.
摘要翻译：本发明通过编译作为导频序列的函数的一组估计信道增益，一组分析信道增益变量和一组加权系数变量来计算频域信道增益。作为时间和频率相关函数，噪声相关矩阵和导频序列的函数来计算多个加权系数。从加权系数计算加权矩阵。在从至少一个发射机接收到训练序列之后，从训练序列计算接收的数据矩阵。加权矩阵和接收数据矩阵用于计算频域信道增益。本发明还提供了一种降低估计由至少一个天线接收的至少一个期望信号的时间和频率响应的计算复杂度的方法。此外，由本发明可以内插和预测由至少一个天线接收的至少一个期望信号的时间和频率响应。

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