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51. 发明授权

US07430245B2 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 有权
标题翻译：用于MIMO系统的信道本征模式分解的时域发射和接收处理
公开(公告)号：US07430245B2
公开(公告)日：2008-09-30
申请号：US11500852
申请日：2006-08-07
申请人： John W. Ketchum , Mark Wallace , Steven J. Howard , Jay Rod Walton
发明人： John W. Ketchum , Mark Wallace , Steven J. Howard , Jay Rod Walton
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0617 , H04B7/0413 , H04B7/0443 , H04B7/0854 , H04L25/0204 , H04L25/0212 , H04L25/0248 , H04L25/03057 , H04L27/2608
摘要： Techniques for processing a data transmission at the transmitter and receiver. In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and “water-pouring” results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to determine eigen-modes (i.e., spatial subchannels) of the MIMO channel and to derive a first set of steering vectors used to “precondition” modulation symbols. The singular value decomposition is also performed at the receiver to derive a second set of steering vectors used to precondition the received signals such that orthogonal symbol streams are recovered at the receiver, which can simplify the receiver processing. Water-pouring analysis is used to more optimally allocate the total available transmit power to the eigen-modes, which then determines the data rate and the coding and modulation scheme to be used for each eigen-mode.
摘要翻译：用于在发射机和接收机处理数据传输的技术。在一方面，提供了时域实现，其使用频域奇异值分解和“注水”结果以在发射机和接收机处导出时域脉冲整形和波束导向解决方案。在发射机处执行奇异值分解以确定MIMO信道的本征模式（即，空间子信道），并导出用于“调制前缀”调制符号的第一组导引向量。奇异值分解也在接收机处执行，以导出用于预处理接收信号的第二组导引向量，使得在接收机处恢复正交符号流，这可以简化接收机处理。使用浇注分析来更好地将总可用发射功率分配给本征模式，该本征模式确定了要用于每个本征模式的数据速率和编码和调制方案。

52. 发明授权

US07411929B2 Method and apparatus for utilizing channel state information in a wireless communication system 有权
标题翻译：在无线通信系统中利用信道状态信息的方法和装置
公开(公告)号：US07411929B2
公开(公告)日：2008-08-12
申请号：US10903066
申请日：2004-07-30
申请人： Fuyun Ling , Jay R. Walton , Steven J. Howard , Mark Wallace , John W. Ketchum
发明人： Fuyun Ling , Jay R. Walton , Steven J. Howard , Mark Wallace , John W. Ketchum
IPC分类号： H04L27/00
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0632 , H04B7/0854 , H04B7/0891 , H04L1/0003 , H04L1/0009 , H04L1/0015 , H04L1/0026 , H04L5/0023 , H04L5/0044 , H04L5/006 , H04L5/0091 , H04L25/0204 , H04L25/021 , H04L25/0228 , H04L25/0244 , H04L25/0248 , H04L25/03159 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input multiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from each receive antenna comprising a combination of one or more signals transmitted from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver unit is processed based on the received CSI.
摘要翻译：用于在多输入多输出（MIMO）通信系统中将数据从发射机单元传输到接收机单元的技术。在一种方法中，在接收机单元处，经由多个接收天线接收多个信号，其中来自每个接收天线的接收信号包括从发射机单元发送的一个或多个信号的组合。处理所接收的信号以导出指示用于数据传输的多个传输信道的特性的信道状态信息（CSI）。 CSI被发回到发射机单元。在发射机单元处，接收来自接收机单元的CSI，并根据所接收到的CSI处理用于传输到接收机单元的数据。

53. 发明授权

US07346115B2 Iterative eigenvector computation for a MIMO communication system 有权
标题翻译： MIMO通信系统的迭代特征向量计算
公开(公告)号：US07346115B2
公开(公告)日：2008-03-18
申请号：US10830907
申请日：2004-04-22
申请人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Peter Monsen , J. Rodney Walton
发明人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Peter Monsen , J. Rodney Walton
IPC分类号： H04L27/28 , H04L1/02
CPC分类号： H04B7/0615 , H04B7/0413
摘要： A matrix {circumflex over (V)} of eigenvectors is derived using an iterative procedure. For the procedure, an eigenmode matrix Vi is first initialized, e.g., to an identity matrix. The eigenmode matrix Vi is then updated based on a channel response matrix Ĥ for a MIMO channel to obtain an updated eigenmode matrix Vi+1. The eigenmode matrix may be updated for a fixed or variable number of iterations. The columns of the updated eigenmode matrix may be orthogonalized periodically to improve performance and ensure stability of the iterative procedure. In one embodiment, after completion of all iterations, the updated eigenmode matrix for the last iteration is provided as the matrix {circumflex over (V)}.
摘要翻译：使用迭代过程导出特征向量的矩阵 V。对于该过程，本征模式矩阵 V I i首先被初始化，例如，到单位矩阵。然后，基于MIMO信道的信道响应矩阵 H更新本征模式矩阵 V i，以获得更新的本征模式矩阵 V i + 1 。可以针对固定或可变数量的迭代更新本征模式矩阵。更新的本征模式矩阵的列可以周期性地正交化以提高性能并确保迭代过程的稳定性。在一个实施例中，在完成所有迭代之后，最后迭代的更新的本征模式矩阵被提供为矩阵 V。

54. 发明授权

US07336746B2 Data transmission with spatial spreading in a MIMO communication system 有权
标题翻译：在MIMO通信系统中具有空间扩展的数据传输
公开(公告)号：US07336746B2
公开(公告)日：2008-02-26
申请号：US11683736
申请日：2007-03-08
申请人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/10
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0678 , H04L1/0002 , H04L1/0003 , H04L1/0009 , H04L5/0023 , H04L25/0224
摘要： For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.
摘要翻译：对于具有空间扩展的数据传输，发送实体（1）对每个数据分组进行编码和调制，以获得相应的数据符号块，（2）将数据符号块复用到N个S / S数据符号流上以便传输（3）用导向矩阵空间扩展N S S个数据符号流，并且（4）空间地处理N S S个数据符号流， / SUB>扩展符号流，用于N信道本征模式上的全CSI传输或MIMO信道的N SUB空间信道上的部分CSI传输。接收实体（1）通过N个N个接收天线获得接收到的N N个符号流，（2）执行用于全CSI或部分CSI传输的接收机空间处理，以获得（3）使用发送实体使用的相同导向矩阵空间地解扩N N S S个检测到的符号流，以获得N N个S＆lt; S＆lt; S＆lt; （4）对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。

55. 发明授权

US07298805B2 Multi-antenna transmission for spatial division multiple access 有权
标题翻译：用于空分多址的多天线传输
公开(公告)号：US07298805B2
公开(公告)日：2007-11-20
申请号：US10719802
申请日：2003-11-21
申请人： J. Rodney Walton , John W. Ketchum , John Edward Smee , Mark S. Wallace , Steven J. Howard
发明人： J. Rodney Walton , John W. Ketchum , John Edward Smee , Mark S. Wallace , Steven J. Howard
IPC分类号： H04L1/02
CPC分类号： H04B7/043 , H04B1/71072 , H04B7/0408 , H04B7/0413 , H04B7/0421 , H04B7/0617 , H04B7/0619 , H04B7/0697 , H04B17/309 , H04L5/023 , H04W16/28
摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.
摘要翻译：获得每个终端的上行链路信道响应矩阵，并对其进行分解，得到终端在上行链路上使用的导向矢量。基于其导向矢量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合（例如具有最高总吞吐量）。每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。接入点根据接收机空间处理技术对其接收到的符号流执行接收机空间处理，以恢复由所选终端发送的数据符号流。

56. 发明授权

US07116725B2 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 有权
标题翻译：用于MIMO系统的信道本征模式分解的时域发射和接收处理
公开(公告)号：US07116725B2
公开(公告)日：2006-10-03
申请号：US10884305
申请日：2004-07-02
申请人： John W. Ketchum , Mark Wallace , Steven J. Howard , Jay Rod Walton
发明人： John W. Ketchum , Mark Wallace , Steven J. Howard , Jay Rod Walton
IPC分类号： H04L27/04 , H04L27/12 , H04L27/20
CPC分类号： H04B7/0417 , H04B7/0443 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0029 , H04L25/03343 , H04L25/03834 , H04L27/2601 , H04L27/2647 , H04L2025/0349 , H04L2025/03605
摘要： Techniques for processing a data transmission at the transmitter and receiver. In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and “water-pouring” results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to determine eigen-modes (i.e., spatial subchannels) of the MIMO channel and to derive a first set of steering vectors used to “precondition” modulation symbols. The singular value decomposition is also performed at the receiver to derive a second set of steering vectors used to precondition the received signals such that orthogonal symbol streams are recovered at the receiver, which can simplify the receiver processing. Water-pouring analysis is used to more optimally allocate the total available transmit power to the eigen-modes, which then determines the data rate and the coding and modulation scheme to be used for each eigen-mode.
摘要翻译：用于在发射机和接收机处理数据传输的技术。在一方面，提供了时域实现，其使用频域奇异值分解和“注水”结果在发射机和接收机处导出时域脉冲整形和波束导向解决方案。在发射机处执行奇异值分解以确定MIMO信道的本征模式（即，空间子信道），并导出用于“调制前缀”调制符号的第一组导引向量。奇异值分解也在接收机处执行，以导出用于预处理接收信号的第二组导引向量，使得在接收机处恢复正交符号流，这可以简化接收机处理。使用浇注分析来更好地将总可用发射功率分配给本征模式，该本征模式确定了要用于每个本征模式的数据速率和编码和调制方案。

57. 发明授权

US07110463B2 Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system 有权
标题翻译：用于在MIMO通信系统中用于指导发射分集的空间滤波器矩阵的有效计算
公开(公告)号：US07110463B2
公开(公告)日：2006-09-19
申请号：US10882491
申请日：2004-06-30
申请人： Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
发明人： Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
IPC分类号： H04B7/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0697 , H04B7/0854
摘要： Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case, an initial spatial filter matrix may be derived based on one channel response matrix, and a spatial filter matrix for each transmission span may be computed based on the initial spatial filter matrix and a steering matrix used for that transmission span. The channel response matrices may be partially correlated if the MIMO channel is not static but does not change abruptly. In this case, a spatial filter matrix may be derived for one transmission span l and used to derive an initial spatial filter matrix for another transmission span m. A spatial filter matrix for transmission span m may be computed based on the initial spatial filter matrix, e.g., using an iterative procedure.
摘要翻译：描述了有效计算空间滤波器矩阵的技术。如果信道在传输跨度的范围内是相对静态的，则用于MIMO信道的信道响应矩阵可以是高度相关的。在这种情况下，可以基于一个信道响应矩阵导出初始空间滤波器矩阵，并且可以基于初始空间滤波器矩阵和用于该传输跨度的导引矩阵来计算每个传输跨度的空间滤波器矩阵。如果MIMO信道不是静态的但是不突然改变，则信道响应矩阵可以是部分相关的。在这种情况下，可以为一个传输跨度l导出空间滤波器矩阵，并且用于导出用于另一个传输跨度m的初始空间滤波器矩阵。可以基于初始空间滤波器矩阵来计算用于传输跨度m的空间滤波器矩阵，例如使用迭代过程。

58. 发明授权

US06771706B2 Method and apparatus for utilizing channel state information in a wireless communication system 有权
标题翻译：在无线通信系统中利用信道状态信息的方法和装置
公开(公告)号：US06771706B2
公开(公告)日：2004-08-03
申请号：US09816481
申请日：2001-03-23
申请人： Fuyun Ling , Jay R. Walton , Steven J. Howard , Mark Wallace , John W. Ketchum
发明人： Fuyun Ling , Jay R. Walton , Steven J. Howard , Mark Wallace , John W. Ketchum
IPC分类号： H04B702
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0632 , H04B7/0854 , H04B7/0891 , H04L1/0003 , H04L1/0009 , H04L1/0015 , H04L1/0026 , H04L5/0023 , H04L5/0044 , H04L5/006 , H04L5/0091 , H04L25/0204 , H04L25/021 , H04L25/0228 , H04L25/0244 , H04L25/0248 , H04L25/03159 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input multiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from each receive antenna comprising a combination of one or more signals transmitted from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver unit is processed based on the received CSI.
摘要翻译：用于在多输入多输出（MIMO）通信系统中将数据从发射机单元传输到接收机单元的技术。在一种方法中，在接收机单元处，经由多个接收天线接收多个信号，其中来自每个接收天线的接收信号包括从发射机单元发送的一个或多个信号的组合。处理所接收的信号以导出指示用于数据传输的多个传输信道的特性的信道状态信息（CSI）。 CSI被发回到发射机单元。在发射机单元处，接收来自接收机单元的CSI，并根据所接收到的CSI处理用于传输到接收机单元的数据。

59. 发明授权

US06256301B1 Reservation multiple access 有权
标题翻译：预约多次访问
公开(公告)号：US06256301B1
公开(公告)日：2001-07-03
申请号：US09173572
申请日：1998-10-15
申请人： Edward G. Tiedemann, Jr. , Steven J. Howard , Rod Walton , Mark S. Wallace
发明人： Edward G. Tiedemann, Jr. , Steven J. Howard , Rod Walton , Mark S. Wallace
IPC分类号： H04L7216
CPC分类号： H04W74/002 , H04W74/0866
摘要： A mobile station accesses a base station by randomly selecting a first reverse link common control channel from a set of random access channels. The mobile station transmits a request portion of an access probe over the first reverse link common control channel. The request portion is subject to collision with other signals. The request portion comprises a hash identification which is derived from a uniquely identifying number using a hash function. The hash identification quasi-uniquely identifies the mobile station. The mobile station receives a channel assignment message from the base station designating the hash identification and a reserved access channel. The reserved access channel provides communication with a low probability of contention. The mobile station transmits a message portion of the access probe over the reserved access channel.
摘要翻译：移动站通过从一组随机接入信道中随机选择第一反向链路公共控制信道来访问基站。移动站通过第一反向链路公共控制信道发送接入探测的请求部分。请求部分与其他信号发生冲突。请求部分包括使用散列函数从唯一标识号导出的散列识别。散列识别准唯一地识别移动台。移动站从指定散列识别的基站和预留接入信道接收信道分配消息。保留的接入信道提供低竞争概率的通信。移动台通过保留的接入信道发送接入探测的消息部分。

60. 发明授权

US5862658A Grass remover for termite bait station 失效
标题翻译：白蚁诱饵站除草剂
公开(公告)号：US5862658A
公开(公告)日：1999-01-26
申请号：US18544
申请日：1998-02-04
申请人： Steven J. Howard
发明人： Steven J. Howard
IPC分类号： A01D34/84 , A01B33/06
CPC分类号： A01D34/84 , Y10S56/09
摘要： This is a grass remover to remove grass from the surface of an area in a circular path about the top of a guide hole in which a termite bait station may be inserted. This includes a circular skirt with a hub in the middle and a plurality of cutting blades sharpened at the lower end and carried between the hub and the skirt. A guide cylinder is fixed to the hub and extends downwardly into the guide hole. A stem extends upwardly from the hub and is of a character to fit into the chuck of a hand drill. Operation of the hand drill when the guide cylinder is in the guide hole causes the grass to be removed from the circular area about the top of the guide hole.
摘要翻译：这是一种草地去除器，用于从围绕可以插入白蚁诱饵站的引导孔的顶部的圆形路径的区域的表面去除草。这包括在中间具有轮毂的圆形裙部以及在下端锋利地切割并在轮毂和裙部之间承载的多个切割刀片。引导筒固定在轮毂上并向下延伸到导向孔中。杆从轮毂向上延伸并且具有适合于手钻的卡盘的特征。当导向筒位于导向孔中时，手钻的操作使得围绕导孔顶部的圆形区域移除草。

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