公开(公告)号：US20060105761A1

公开(公告)日：2006-05-18

申请号：US11301790

申请日：2005-12-12

申请人： Jay Walton ,  Mark Wallace ,  Steven Howard

发明人： Jay Walton ,  Mark Wallace ,  Steven Howard

IPC分类号： H04Q7/20

CPC分类号： H04W72/121 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0697 ,  H04B7/0891 ,  H04W72/1205

摘要： Techniques to schedule uplink data transmission for a number of terminals in a wireless communication system. In one method, a number of sets of terminals are formed for possible data transmission, with each set including a unique combination of terminals and corresponds to a hypothesis to be evaluated. The performance of each hypothesis is evaluated (e.g., based on channel response estimates for each terminal) and one of the evaluated hypotheses is selected based on the performance. The terminals in the selected hypothesis are scheduled for data transmission. A successive cancellation receiver processing scheme may be used to process the signals transmitted by the scheduled terminals. In this case, one or more orderings of the terminals in each set may be formed, with each terminal ordering corresponding to a sub-hypothesis to be evaluated. The performance of each sub-hypothesis is then evaluated and one of the sub-hypotheses is selected.

公开(公告)号：US20060104381A1

公开(公告)日：2006-05-18

申请号：US11184601

申请日：2005-07-18

申请人： Murali Menon ,  John Ketchum ,  Mark Wallace ,  Jay Walton ,  Steven Howard

发明人： Murali Menon ,  John Ketchum ,  Mark Wallace ,  Jay Walton ,  Steven Howard

IPC分类号： H04B7/02 ,  H04K1/10

CPC分类号： H04B7/0417 ,  H01Q3/26 ,  H04B7/043 ,  H04B7/0617 ,  H04B7/0634 ,  H04L5/0025 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0096 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/42

摘要： Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband. The total transmit power is allocated to the subbands based on a particular power allocation scheme (e.g., full channel inversion, selective channel inversion, water-filling, or uniform). A scaling value is then obtained for each subband based on its allocated transmit power. Data to be transmitted is coded and modulated to provide modulation symbols. The modulation symbols to be transmitted on each subband are scaled with the subband's scaling value and further preconditioned with the subband's steering vector. A stream of preconditioned symbols is then formed for each transmit antenna.

摘要翻译： 执行波束转向和波束成形以在宽带多输入通道中的单个本征模上传输数据的技术。 在一种方法中，为多个子带中的每一个获得导向矢量。 取决于如何定义导向矢量，可以为每个子带实现波束转向或波束形成。 基于特定功率分配方案（例如，全信道反转，选择性信道反转，充水或均匀）将总发射功率分配给子带。 然后根据其分配的发射功率，为每个子带获得缩放值。 要发送的数据被编码和调制以提供调制符号。 要在每个子带上发送的调制符号用子带的缩放值进行缩放，并进一步用子带的导向矢量进行预处理。 然后为每个发射天线形成预处理符号流。

公开(公告)号：US20060093067A1

公开(公告)日：2006-05-04

申请号：US11298639

申请日：2005-12-08

申请人： Ahmad Jalali ,  Jay Walton ,  Mark Wallace

发明人： Ahmad Jalali ,  Jay Walton ,  Mark Wallace

IPC分类号： H04B7/06 ,  H04K1/10

CPC分类号： H04L5/023

摘要： Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).

公开(公告)号：US20060050770A1

公开(公告)日：2006-03-09

申请号：US11042126

申请日：2005-01-24

申请人： Mark Wallace ,  Irina Medvedev ,  Jay Walton

发明人： Mark Wallace ,  Irina Medvedev ,  Jay Walton

IPC分类号： H04L1/02 ,  H04B1/707

CPC分类号： H04L25/0242 ,  H04B7/0669 ,  H04B7/068 ,  H04B7/0854 ,  H04L1/0606 ,  H04L1/0618 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0256 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2647 ,  H04L2025/03426

摘要： A receiving entity obtains received symbols for a data transmission having at least one data symbol stream sent with space-time transmit diversity (STTD). The receiving entity derives an overall channel response matrix in accordance with the STTD encoding scheme used for the data transmission, derives a spatial filter matrix based on the overall channel response matrix, and performs spatial matched filtering on a vector of received symbols for each 2-symbol interval to obtain a vector of detected symbols for the 2-symbol interval. The receiving entity may perform post-processing (e.g., conjugation) on the detected symbols if needed. Alternatively, the receiving entity derives a spatial filter matrix based on an effective channel response matrix, performs spatial matched filtering on the received symbols for each symbol period to obtain detected symbols for that symbol period, and combines multiple estimates obtained for each data symbol sent with STTD.

摘要翻译： 接收实体获得具有用空时传输分集（STTD）发送的至少一个数据符号流的数据传输的接收符号。 接收实体根据用于数据传输的STTD编码方案导出整体信道响应矩阵，基于整个信道响应矩阵导出空间滤波器矩阵，并且对每个2-信道的接收符号的向量执行空间匹配滤波， 符号间隔以获得用于2符号间隔的检测符号的向量。 如果需要，接收实体可以在检测到的符号上执行后处理（例如，共轭）。 或者，接收实体基于有效信道响应矩阵导出空间滤波器矩阵，对于每个符号周期对接收到的符号执行空间匹配滤波，以获得该符号周期的检测符号，并且将针对每个符号周期发送的每个数据符号获得的多个估计合并 STTD。

公开(公告)号：US20050249174A1

公开(公告)日：2005-11-10

申请号：US11066771

申请日：2005-02-24

申请人： Stein Lundby ,  Steven Howard ,  Jay Walton

发明人： Stein Lundby ,  Steven Howard ,  Jay Walton

IPC分类号： H04B7/06 ,  H04L27/26 ,  H04Q7/24

CPC分类号： H04L27/2602

摘要： A transmitting entity uses different steering vectors for different subbands to achieve steering diversity. Each steering vector defines or forms a beam for an associated subband. Any steering vector may be used for steering diversity. The steering vectors may be defined such that the beams vary in a continuous instead of abrupt manner across the subbands. This may be achieved by applying continuously changing phase shifts across the subbands for each transmit antenna. As an example, the phase shifts may change in a linear manner across the subbands for each transmit antenna, and each antenna may be associated with a different phase slope. The application of linearly changing phase shifts to modulation symbols in the frequency domain may be achieved by either delaying or circularly shifting the corresponding time-domain samples.

摘要翻译： 发射实体为不同的子带使用不同的导向矢量来实现转向分集。 每个导向矢量定义或形成用于相关子带的波束。 任何导向矢量都可用于转向分集。 导向矢量可以被定义为使得光束在连续而不是突变的方式跨越子带而变化。 这可以通过在每个发射天线的子带上应用不断变化的相移来实现。 作为示例，相移可以在每个发射天线的子带上以线性方式改变，并且每个天线可以与不同的相位斜率相关联。 线性变化相移到频域中的调制符号的应用可以通过延迟或循环移位对应的时域采样来实现。

公开(公告)号：US20050238111A1

公开(公告)日：2005-10-27

申请号：US10821390

申请日：2004-04-09

申请人： Mark Wallace ,  Jay Walton ,  Steven Howard

发明人： Mark Wallace ,  Jay Walton ,  Steven Howard

IPC分类号： H04J99/00 ,  H04B7/06 ,  H04L25/03 ,  H04L27/26 ,  H04L1/02

CPC分类号： H04B7/0615 ,  H04B7/0417

摘要： Techniques for generating and using steering matrices for pseudo-random transmit steering (PRTS) are described. For PRTS, a transmitting entity performs spatial processing with steering matrices so that a data transmission observes an ensemble of “effective” channels formed by the actual channel used for data transmission and the steering matrices used for PRTS. The steering matrices may be generated by selecting a base matrix, which may be a Walsh matrix or a Fourier matrix. Different combinations of scalars are then selected, with each combination including at least one scalar for at least one row of the base matrix. Each scalar may be a real or complex value (e.g., +1, −1, +j, or −j, where j={square root}{square root over (−1)}). Different steering matrices are generated by multiplying the base matrix with each of the different combinations of scalars. The steering matrices are different permutations of the base matrix.

摘要翻译： 描述了用于产生和使用用于伪随机发射转向（PRTS）的导向矩阵的技术。 对于PRTS，发射实体使用导引矩阵执行空间处理，使得数据传输观察由用于数据传输的实际信道和用于PRTS的导引矩阵形成的“有效”信道的集合。 可以通过选择可以是沃尔什矩阵或傅立叶矩阵的基本矩阵来生成导引矩阵。 然后选择标量的不同组合，其中每个组合包括用于至少一行基本矩阵的至少一个标量。 每个标量可以是实数或复数值（例如，+1，-1，+ j或-j，其中j = {平方根} {平方根超过（-1）}）。 通过将基本矩阵与标量的不同组合中的每一个相乘来生成不同的导向矩阵。 导向矩阵是基本矩阵的不同排列。

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。

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。

公开(公告)号：US20050157806A1

公开(公告)日：2005-07-21

申请号：US11009824

申请日：2004-12-09

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： H04J99/00 ,  H04B7/005 ,  H04B7/02 ,  H04B7/06 ,  H04B7/12 ,  H04L1/02 ,  H04L25/03

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，以获得进一步处理并通过N T T个发射天线广播的传输符号，并且在一个传输范围内广播覆盖范围内的用户终端 区。

公开(公告)号：US20050135416A1

公开(公告)日：2005-06-23

申请号：US10964237

申请日：2004-10-13

申请人： John Ketchum ,  Jay Walton ,  Sanjiv Nanda

发明人： John Ketchum ,  Jay Walton ,  Sanjiv Nanda

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04L25/03 ,  H04L29/06 ,  H04L29/08 ,  H01L29/792

CPC分类号： H04W28/065 ,  H04L1/1635 ,  H04L25/03343 ,  H04L29/06 ,  H04L47/2441 ,  H04L69/16 ,  H04L69/161 ,  H04L69/22 ,  H04L69/32 ,  H04W80/02 ,  H04W84/12

摘要： Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, a protocol stack is disclosed comprising one or more of the following: an adaptation layer, a data link control layer, a physical layer, and a layer manager. In another aspect, physical layer feedback is used for adaptation layer processing. In one embodiment, physical layer feedback is used for segmentation. In another embodiment, physical layer feedback is used for multicast mapping onto one or more unicast channels. In another aspect, a data unit for transmission from a first station to a second station comprises zero or more complete sub-data units, zero or one partial sub-data units from a prior transmission, and zero or one partial sub-data units to fill the data unit. In one embodiment, a pointer may be used to indicate the location of any complete sub-data units.

摘要翻译： 公开了解决用于高吞吐量系统的有效使用的MAC处理的实施例。 一方面，公开了一种协议栈，其包括以下一个或多个：适配层，数据链路控制层，物理层和层管理器。 在另一方面，物理层反馈用于适应层处理。 在一个实施例中，物理层反馈用于分割。 在另一个实施例中，物理层反馈用于到一个或多个单播信道上的多播映射。 在另一方面，用于从第一站到第二站的传输的数据单元包括零个或多个完整的子数据单元，来自先前传输的零个或一个部分子数据单元，以及零个或一个部分子数据单元 填写数据单元。 在一个实施例中，可以使用指针来指示任何完整的子数据单元的位置。