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。

公开(公告)号：US20050135403A1

公开(公告)日：2005-06-23

申请号：US10964332

申请日：2004-10-13

申请人： John Ketchum ,  Mark Wallace ,  Jay Walton ,  Sanjiv Nanda

发明人： John Ketchum ,  Mark Wallace ,  Jay Walton ,  Sanjiv Nanda

IPC分类号： H04L12/56 ,  H04L29/06 ,  H04L29/08

CPC分类号： H04L29/06 ,  H04L69/32 ,  H04L69/324 ,  H04L69/325

摘要： Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, an apparatus comprises a first layer for receiving one or more packets from one or more data flows and for generating one or more first layer Protocol Data Units (PDUs) from the one or more packets. In another aspect, a second layer is deployed for generating one or more MAC frames based on the one or more MAC layer PDUs. In another aspect, a MAC frame is deployed for transmitting one or more MAC layer PDUs. The MAC frame may comprise a control channel for transmitting one or more allocations. The MAC frame may comprise one or more traffic segments in accordance with allocations.

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。 在一个方面，一种装置包括用于从一个或多个数据流接收一个或多个分组并用于从所述一个或多个分组生成一个或多个第一层协议数据单元（PDU）的第一层。 在另一方面，第二层被部署用于基于一个或多个MAC层PDU生成一个或多个MAC帧。 在另一方面，部署MAC帧以发送一个或多个MAC层PDU。 MAC帧可以包括用于发送一个或多个分配的控制信道。 MAC帧可以包括根据分配的一个或多个业务段。

公开(公告)号：US20050135291A1

公开(公告)日：2005-06-23

申请号：US10964320

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 ,  H04L29/06 ,  H04J3/06

CPC分类号： H04W72/1273 ,  H04L29/06 ,  H04L69/08 ,  H04L69/24 ,  H04W28/065

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。

公开(公告)号：US20050128953A1

公开(公告)日：2005-06-16

申请号：US11045781

申请日：2005-01-27

申请人： Mark Wallace ,  John Ketchum ,  J. Walton ,  Steven Howard

发明人： Mark Wallace ,  John Ketchum ,  J. Walton ,  Steven Howard

IPC分类号： H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L5/14 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04J11/00

CPC分类号： H04W52/50 ,  H04B7/0421 ,  H04B7/0615 ,  H04B7/0619 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04B17/21 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L5/1469 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/0244 ,  H04L25/03343 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/261 ,  H04L27/2647 ,  H04L2001/0093 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04W16/28 ,  H04W52/42

摘要： Techniques are described to calibrate the downlink and uplink channels to account for differences in the frequency responses of the transmit and receive chains at an access point and a user terminal. In one method, pilots are transmitted on the downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Correction factors for the access point and correction factors for the user terminal are determined based on (e.g., by performing matrix-ratio computation or minimum mean square error (MMSE) computation on) the downlink and uplink channel response estimates. The correction factors for the access point and the correction factors for the user terminal are used to obtain a calibrated downlink channel and a calibrated uplink channel, which are transpose of one another. The calibration may be performed in real time based on over-the-air transmission.

摘要翻译： 描述技术来校准下行链路和上行链路信道以解决在接入点和用户终端处的发射和接收链的频率响应的差异。 在一种方法中，导频在下行链路和上行链路信道上传输，并用于分别导出下行链路和上行链路信道响应的估计。 基于（例如，通过对下行链路和上行链路信道响应估计执行矩阵比计算或最小均方误差（MMSE）计算）来确定用于接入点的校正因子和用户终端的校正因子。 用于接入点的校正因子和用户终端的校正因子被用于获得经校准的下行链路信道和被校准的上行链路信道，这些信道彼此相互转置。 可以基于空中传输实时地进行校准。

公开(公告)号：US20080002794A1

公开(公告)日：2008-01-03

申请号：US11750471

申请日：2007-05-18

申请人： Mark Wallace ,  John Ketchum ,  J. Walton ,  Steven Howard

发明人： Mark Wallace ,  John Ketchum ,  J. Walton ,  Steven Howard

IPC分类号： H04B1/10

CPC分类号： H04W52/42 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/266 ,  H04W52/286

摘要： Techniques for performing acquisition of packets are described. First detection values may be determined based on a first plurality of samples, e.g., by performing delay-multiply-integrate on the samples. Power values may be determined based on the first plurality of samples, e.g., by performing multiply-integrate on the samples. The first detection values may be averaged to obtain average detection values. The power values may also be averaged to obtain average power values. Whether a packet is presence may be determined based on the average detection values and the average power values. Second detection values may be determined based on a second plurality of samples. The start of the packet may be determined based on the first and second detection values. A third detection value may be determined based on a third plurality of samples. Frequency error of the packet may be estimated based on the first and third detection values.

摘要翻译： 描述用于执行分组获取的技术。 可以基于第一多个样本来确定第一检测值，例如通过对样本执行延迟乘法积分。 功率值可以基于第一多个样本来确定，例如通过对样本进行乘法积分。 可以对第一检测值进行平均以获得平均检测值。 功率值也可以被平均以获得平均功率值。 可以基于平均检测值和平均功率值来确定分组是否存在。 可以基于第二多个样本来确定第二检测值。 分组的开始可以基于第一和第二检测值来确定。 可以基于第三多个样本来确定第三检测值。 可以基于第一和第三检测值来估计分组的频率误差。

公开(公告)号：US20070207909A1

公开(公告)日：2007-09-06

申请号：US11368980

申请日：2006-03-06

申请人： Dave Whitten ,  John Ketchum

发明人： Dave Whitten ,  John Ketchum

IPC分类号： B31F1/00

CPC分类号： B65H45/163 ,  B65H2301/44314

摘要： A folder includes a cylinder having a first gripping device receiving a folded edge of a signature and rotating the signature at a first surface speed. A conveyor presses the signature against the outer surface and the conveyor contacts the signatures at a second surface speed slower than the first surface speed. The present invention also provides a method for removing signatures from a cylinder.

摘要翻译： 文件夹包括具有接收签名的折叠边缘的第一夹持装置并以第一表面速度旋转签名的圆柱体。 输送机将签名器压靠在外表面上，并且输送机以比第一表面速度慢的第二表面速度接触签名。 本发明还提供一种从圆筒移除签名的方法。

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.

公开(公告)号：US20060274844A1

公开(公告)日：2006-12-07

申请号：US11471415

申请日：2006-06-19

申请人： J. Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

发明人： J. Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

IPC分类号： H04K1/10

CPC分类号： H04L1/0002 ,  H04B7/0417 ,  H04B7/0617 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0242 ,  H04L27/2647

摘要： Frequency-independent eigensteering in MISO and MIMO systems are described. For principal mode and multi-mode eigensteering, a correlation matrix is computed for a MIMO channel based on channel response matrices and decomposed to obtain NS frequency-independent steering vectors for NS spatial channels of the MIMO channel. ND data symbol streams are transmitted on ND best spatial channels using ND steering vectors, where ND=1 for principal mode eigensteering and ND>1 for multi-mode eigensteering. For main path eigensteering, a data symbol stream is transmitted on the best spatial channel for the main propagation path (e.g., with the highest energy) of the MIMO channel. For receiver eigensteering, a data symbol stream is steered toward a receive antenna based on a steering vector obtained for that receive antenna. For all eigensteering schemes, a matched filter is derived for each receive antenna based on the steering vector(s) and channel response vectors for the receive antenna.

摘要翻译： 描述MISO和MIMO系统中与频率无关的本征导向。 对于主模式和多模式特征向导，基于信道响应矩阵针对MIMO信道计算相关矩阵，并且对其进行分解，以获得N S S / N N的非频率无关导向向量 > MIMO信道的空间信道。 N N个数据符号流使用N D D个导向矢量在N N D个最佳空间信道上发送，其中N N D = 1用于主模式本征转向，N 1 > 1用于多模特征转向。 对于主路径特征导向，在用于主要传播路径（例如，具有最高能量）的MIMO信道的最佳空间信道上发送数据符号流。 对于接收机本征导向，基于为该接收天线获得的导向向量，将数据符号流转向接收天线。 对于所有特征导向方案，基于接收天线的导向矢量和信道响应向量，为每个接收天线导出匹配滤波器。

公开(公告)号：US20060116155A1

公开(公告)日：2006-06-01

申请号：US11330733

申请日：2006-01-11

申请人： Irina Medvedev ,  Jay Walton ,  John Ketchum

发明人： Irina Medvedev ,  Jay Walton ,  John Ketchum

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W52/346 ,  H04B7/0443 ,  H04W24/00 ,  H04W52/241 ,  H04W52/267 ,  H04W52/50 ,  H04W72/00

摘要： Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. In such situations, the techniques reallocate the excess transmit power of transmission channels operated in the saturation region to other transmission channels operated below the saturation region. In this way, higher data rate may be achieved for the “poorer” transmission channels without sacrificing the performance of the “better” transmission channels.