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1. 发明申请

US20050175115A1 Spatial spreading in a multi-antenna communication system 有权
标题翻译：多天线通信系统中的空间扩展
公开(公告)号：US20050175115A1
公开(公告)日：2005-08-11
申请号：US11008865
申请日：2004-12-09
申请人： Jay Walton , Lizhong Zheng , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , Lizhong Zheng , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： H04J99/00 , H04L1/06 , H04L1/02
CPC分类号： H04B7/0417 , H04B7/0456 , H04B7/0669 , H04B17/336 , H04L1/06
摘要： Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.
摘要翻译：在多天线系统中执行空间扩展，以随机化接收实体针对每个发送的数据符号块观察到的“有效”信道。对于MIMO系统，在发送实体处理（例如，编码，交织和调制）数据以获得N N个数据符号块，以在N M M中发送。传输范围，其中N = 1和N M M 1。 N N个块被划分为N个M个数据符号子块，每个传输跨度的一个子块。对于每个子块，选择导向矩阵（例如，以确定性或伪随机方式从一组L个导引矩阵中，其中L> 1）。利用为该子块选择的导引矩阵来对每个数据符号子块进行空间处理，以获得在一个传输跨度中通过N T个发射天线进一步处理和传输的发射符号。 N N个数据符号块因此用N M M导引矩阵进行空间处理并观察信道的整体。

2. 发明申请

US20050159735A1 Refrigeration source for a cryoablation catheter 审中-公开
标题翻译：冷冻消融导管的制冷源
公开(公告)号：US20050159735A1
公开(公告)日：2005-07-21
申请号：US10888804
申请日：2004-07-09
申请人： Jay Walton , Lizhong Zheng , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , Lizhong Zheng , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： A61B17/00 , A61B18/02 , A61F7/00 , A61F7/10 , A61F7/12 , A61M25/00 , F25B9/02
CPC分类号： F25D3/10 , A61B18/02 , A61B2017/00199 , A61B2018/0212 , A61B2018/0262 , A61B2018/0268 , F25B9/02 , F25B2700/13 , F25D16/00 , F25D2400/36
摘要： An apparatus and method for automatic operation of a refrigeration system to provide refrigeration power to a catheter for tissue ablation or mapping. The primary refrigeration system can be open loop or closed loop, and a precool loop will typically be closed loop. Equipment and procedures are disclosed for bringing the system to the desired operational state, for controlling the operation by controlling refrigerant flow rate, for performing safety checks, and for achieving safe shutdown. The catheter-based system for performing a cryoablation procedure uses a precooler to lower the temperature of a fluid refrigerant to a sub-cool temperature (−40° C.) at a working pressure (400 psi). The sub-cooled fluid is then introduced into a supply line of the catheter. Upon outflow of the primary fluid from the supply line, and into a tip section of the catheter, the fluid refrigerant boils at an outflow pressure of approximately one atmosphere, at a temperature of about −88° C. In operation, the working pressure is computer controlled to obtain an appropriate outflow pressure for the coldest possible temperature in the tip section.
摘要翻译：一种用于自动操作制冷系统以向用于组织消融或映射的导管提供制冷功率的装置和方法。主要制冷系统可以是开环或闭环，并且预冷循环通常将是闭环的。公开了用于使系统达到所需操作状态的设备和程序，用于通过控制制冷剂流量来控制操作，用于执行安全检查和实现安全关闭。用于执行冷冻消融程序的基于导管的系统使用预冷器来在工作压力（400psi）下将流体制冷剂的温度降低至亚冷的温度（-40℃）。然后将次冷流体引入导管的供应管线。在主要流体从供应管路流出并进入导管的尖端部分时，流体制冷剂在大约一个大气压的流出压力下沸腾，温度约为-88℃。在操作中，工作压力为计算机控制以获得适当的流出压力，用于在尖端部分中最冷的温度。

3. 发明申请

US20080031372A1 BROADCAST TRANSMISSION WITH SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 有权
标题翻译：在多天线通信系统中具有空间扩展的广播传输
公开(公告)号：US20080031372A1
公开(公告)日：2008-02-07
申请号：US11870380
申请日：2007-10-10
申请人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： H04L27/28
CPC分类号： H04L25/03866 , H04B7/043 , H04B7/0615 , H04B7/0669 , H04B7/0678 , H04B7/068 , H04B7/12 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04W52/42
摘要： An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, and modulated to obtain ND data symbol blocks to be broadcast in NM transmission spans, where ND≧1 and NM>1. The ND data symbol blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and broadcast via NT transmit antennas and in one transmission span to user terminals within a broadcast coverage area.
摘要翻译：多天线系统中的接入点使用空间扩展广播数据，以随机化由接入点广播的每个数据符号块由每个用户终端观察到的“有效”信道。在接入点，对数据进行编码，交织和调制，以获得要在N N个传输跨度中广播的N个D个数据符号块，其中N < / SUB >> = 1和N＆lt; 1＆gt; 1。 N N个数据符号块被划分为N个M个数据符号子块，每个传输跨度的一个子块。对于每个子块，选择导向矩阵（例如，从一组L个导引矩阵中以确定性或伪随机方式）。利用为该子块选择的导引矩阵来对每个数据符号子块进行空间处理，以获得发射符号，其进一步经由N T T个发射天线处理和广播，并且在一个传输跨度内广播覆盖范围内的用户终端区。

4. 发明申请

US20060274638A1 Multiple-access hybrid OFDM-CDMA system 有权
公开(公告)号：US20060274638A1
公开(公告)日：2006-12-07
申请号：US11494126
申请日：2006-07-26
申请人： Jay Walton , John Ketchum , Steven Howard , Mark Wallace
发明人： Jay Walton , John Ketchum , Steven Howard , Mark Wallace
IPC分类号： H04J11/00
CPC分类号： H04W52/12 , H04B1/692 , H04L5/0021 , H04L5/0048 , H04L5/026 , H04L25/0228 , H04L27/0008 , H04L27/2607 , H04L27/2613 , H04L27/2647 , H04L27/2655 , H04W52/286
摘要： In one aspect of a multiple-access OFDM-CDMA system, the data spreading is performed in the frequency domain by spreading each data stream with a respective spreading code selected from a set of available spreading codes. To support multiple access, system resources may be allocated and de-allocated to users (e.g., spreading codes may be assigned to users as needed, and transmit power may be allocated to users). Variable rate data for each user may be supported via a combination of spreading adjustment and transmit power scaling. Interference control techniques are also provided to improve system performance via power control of the downlink and/or uplink transmissions to achieve the desired level of performance while minimizing interference. A pilot may be transmitted by each transmitter unit to assist the receiver units perform acquisition, timing synchronization, carrier recovery, handoff, channel estimation, coherent data demodulation, and so on.

5. 发明申请

US20060155798A1 Eigenvalue decomposition and singular value decomposition of matrices using jacobi rotation 有权
标题翻译：使用雅可比旋转的矩阵的特征值分解和奇异值分解
公开(公告)号：US20060155798A1
公开(公告)日：2006-07-13
申请号：US11280596
申请日：2005-11-15
申请人： John Ketchum , Jay Walton , Mark Wallace , Steven Howard , Hakan Inanoglu
发明人： John Ketchum , Jay Walton , Mark Wallace , Steven Howard , Hakan Inanoglu
IPC分类号： G06F7/52
CPC分类号： G06F17/16 , H04L25/0208 , H04L25/0246 , H04L25/0248
摘要： Techniques for decomposing matrices using Jacobi rotation are described. Multiple iterations of Jacobi rotation are performed on a first matrix of complex values with multiple Jacobi rotation matrices of complex values to zero out the off-diagonal elements in the first matrix. For each iteration, a submatrix may be formed based on the first matrix and decomposed to obtain eigenvectors for the submatrix, and a Jacobi rotation matrix may be formed with the eigenvectors and used to update the first matrix. A second matrix of complex values, which contains orthogonal vectors, is derived based on the Jacobi rotation matrices. For eigenvalue decomposition, a third matrix of eigenvalues may be derived based on the Jacobi rotation matrices. For singular value decomposition, a fourth matrix with left singular vectors and a matrix of singular values may be derived based on the Jacobi rotation matrices.
摘要翻译：描述了使用雅可比旋转分解矩阵的技术。对具有复数值的多个Jacobi旋转矩阵的复数值的第一矩阵执行Jacobi旋转的多次迭代，以将第一矩阵中的非对角线元素归零。对于每个迭代，可以基于第一矩阵形成子矩阵并且被分解以获得子矩阵的特征向量，并且可以与特征向量形成雅可比旋转矩阵并用于更新第一矩阵。基于Jacobi旋转矩阵导出包含正交向量的第二个复数值矩阵。对于特征值分解，可以基于Jacobi旋转矩阵导出特征值的第三矩阵。对于奇异值分解，可以基于雅可比旋转矩阵导出具有左奇异矢量的第四矩阵和奇异值矩阵。

6. 发明申请

US20060106902A1 Efficient computation for eigenvalue decomposition and singular value decomposition of matrices 有权
标题翻译：矩阵特征值分解和奇异值分解的有效计算
公开(公告)号：US20060106902A1
公开(公告)日：2006-05-18
申请号：US11096839
申请日：2005-03-31
申请人： Steven Howard , John Ketchum , Mark Wallace , Jay Walton
发明人： Steven Howard , John Ketchum , Mark Wallace , Jay Walton
IPC分类号： G06F15/00
CPC分类号： G06F17/16 , H04B7/0413 , H04B7/0617 , H04L25/0208 , H04L25/0248 , H04L27/2647
摘要： For eigenvalue decomposition, a first set of at least one variable is derived based on a first matrix being decomposed and using Coordinate Rotational Digital Computer (CORDIC) computation. A second set of at least one variable is derived based on the first matrix and using a look-up table. A second matrix of eigenvectors of the first matrix is then derived based on the first and second variable sets. To derive the first variable set, CORDIC computation is performed on an element of the first matrix to determine the magnitude and phase of this element, and CORDIC computation is performed on the phase to determine the sine and cosine of this element. To derive the second variable set, intermediate quantities are derived based on the first matrix and used to access the look-up table.
摘要翻译：对于特征值分解，基于正在分解的第一矩阵并使用坐标旋转数字计算机（CORDIC）计算来导出至少一个变量的第一组。基于第一矩阵并使用查找表导出第二组至少一个变量。然后基于第一和第二变量集导出第一矩阵的特征向量的第二矩阵。为了导出第一变量集，对第一矩阵的元素执行CORDIC计算，以确定该元素的幅度和相位，并且在相位上执行CORDIC计算以确定该元素的正弦和余弦。为了导出第二变量集，基于第一矩阵导出中间量并用于访问查找表。

7. 发明申请

US20050002326A1 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：US20050002326A1
公开(公告)日：2005-01-06
申请号：US10903066
申请日：2004-07-30
申请人： Fuyung Ling , Jay Walton , Steven Howard , Mark Wallace , John Ketchum
发明人： Fuyung Ling , Jay Walton , Steven Howard , Mark Wallace , John Ketchum
IPC分类号： H04J99/00 , H04B7/04 , H04B7/06 , H04B7/08 , H04L1/00 , H04L27/26 , H04J11/00
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。

8. 发明申请

US20060274849A1 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 有权
公开(公告)号：US20060274849A1
公开(公告)日：2006-12-07
申请号：US11500852
申请日：2006-08-07
申请人： John Ketchum , Mark Wallace , Steven Howard , Jay Walton
发明人： John Ketchum , Mark Wallace , Steven Howard , Jay Walton
IPC分类号： 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.

9. 发明申请

US20080031374A1 BROADCAST TRANSMISSION WITH SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 有权
公开(公告)号：US20080031374A1
公开(公告)日：2008-02-07
申请号：US11870386
申请日：2007-10-10
申请人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： H04L1/02
CPC分类号： H04L25/03866 , H04B7/043 , H04B7/0615 , H04B7/0669 , H04B7/0678 , H04B7/068 , H04B7/12 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04W52/42
摘要： An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, and modulated to obtain ND data symbol blocks to be broadcast in NM transmission spans, where ND≧1 and NM>1. The ND data symbol blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and broadcast via NT transmit antennas and in one transmission span to user terminals within a broadcast coverage area.

10. 发明申请

US20070211814A1 DATA TRANSMISSION WITH SPATIAL SPREADING IN A MIMO COMMUNICATION SYSTEM 有权
标题翻译：数据传输与MIMO通信系统中的空间传播
公开(公告)号：US20070211814A1
公开(公告)日：2007-09-13
申请号：US11683736
申请日：2007-03-08
申请人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： H04L1/02
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。

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