公开(公告)号：US08099658B2

公开(公告)日：2012-01-17

申请号：US11932591

申请日：2007-10-31

申请人： Seok-Jun Lee ,  Srinivas Lingam ,  Anuj Batra ,  Manish Goel

发明人： Seok-Jun Lee ,  Srinivas Lingam ,  Anuj Batra ,  Manish Goel

IPC分类号： H03M13/03

CPC分类号： H03M13/4107 ,  H03M13/6502 ,  H03M13/6583

摘要： A Viterbi decoder includes a branch metric unit, an add-compare select unit coupled to the branch metric unit, and a trace-back unit coupled to the add-compare select unit. The branch metric unit includes a branch metric computation unit coupled to a thresholder unit. The branch metric computation unit is configured to compute a branch metric. The thresholder unit is configured to compare the branch metric with a threshold value. If the branch metric is greater than the threshold value, the thresholder unit is configured to forward the threshold value to the add-compare select and not forward the branch metric to the add-compare select unit. Implementing such a branch metric ceiling allows for a predictable reduction in the significant bits of calculations in the Viterbi decoder, which allows for reduction of complexity via elimination of gates and storage elements.

摘要翻译： 维特比解码器包括分支度量单元，耦合到分支度量单元的加法比较选择单元和耦合到加法比较选择单元的追溯单元。 分支度量单元包括耦合到阈值单元的分支度量计算单元。 分支度量计算单元被配置为计算分支度量。 阈值单元被配置为将分支度量与阈值进行比较。 如果分支度量大于阈值，则阈值单元被配置为将阈值转发到加法比较选择，而不将分支度量转发到加法比较选择单元。 实现这样的分支度量顶点允许在维特比解码器中的有效计算的可预测的减少，这允许通过消除门和存储元件来降低复杂度。

公开(公告)号：US20070113161A1

公开(公告)日：2007-05-17

申请号：US11557208

申请日：2006-11-07

申请人： Srinivas Lingam ,  Seok-Jun Lee ,  Anuj Batra ,  Manish Goel

发明人： Srinivas Lingam ,  Seok-Jun Lee ,  Anuj Batra ,  Manish Goel

IPC分类号： H03M13/03

CPC分类号： H03M13/4107 ,  H03M13/395 ,  H03M13/4169

摘要： A Viterbi decoder includes a branch metric unit for generating branch metrics between two states at two different time periods, a traceback unit, a traceback memory and an add-compare-select circuit. The add-compare-select circuit includes a plurality of cascaded add-compare-select sub-circuits, each add-compare-select sub-circuit calculating a path metric responsive to a plurality of branch metrics from the branch metric unit and a plurality of pre-calculated path metrics, where at least one of the add-compare-select sub-circuits receives a set of pre-calculated path metrics from another one of the add-compare-select sub-circuits.

摘要翻译： 维特比解码器包括用于在两个不同时间段的两个状态之间产生分支度量的分支度量单位，追溯单元，回溯存储器和加法比较选择电路。 加法比较选择电路包括多个级联加法比较选择子电路，每个加法比较选择子电路响应于来自分支度量单位的多个分支度量而计算路径度量，并且多个 预先计算的路径度量，其中至少一个加法比较选择子电路从另一个加法比较选择子电路接收一组预先计算的路径度量。

公开(公告)号：US20060023802A1

公开(公告)日：2006-02-02

申请号：US11190455

申请日：2005-07-27

申请人： Jaiganesh Balakrishnan ,  Srinivas Lingam ,  Manish Goel ,  Anuj Batra

发明人： Jaiganesh Balakrishnan ,  Srinivas Lingam ,  Manish Goel ,  Anuj Batra

IPC分类号： H04L23/02 ,  H04K1/10 ,  H04L27/04

CPC分类号： H04K1/00 ,  H03M13/1102 ,  H03M13/15 ,  H03M13/23 ,  H03M13/2936 ,  H03M13/2957 ,  H03M13/618 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0072 ,  H04L1/04 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2608 ,  H04L2001/0098

摘要： The present disclosure is directed to a transmitter 200 that includes a first block encoder 450 operable to block encode at least a first portion of a multi-band orthogonal frequency division modulation signal. The transmitter 200 also includes a convolution encoder 304 operable to convolution encode the output of the first block encoder 450. A method of communicating is also disclosed. The method comprises block encoding a first portion of a message to produce a first outer code word. The method includes convolution encoding the first outer code word to produce a first inner code word. The method also includes transmitting the first inner code word as part of a multi-band orthogonal frequency division modulation signal.

摘要翻译： 本公开涉及一种发射机200，其包括第一块编码器450，该第一块编码器450可操作以块化多频带正交频分调制信号的至少第一部分。 发射机200还包括可用于对第一块编码器450的输出进行卷积编码的卷积编码器304。 还公开了一种通信方法。 该方法包括对消息的第一部分进行块编码以产生第一外码字。 该方法包括对第一外码字进行卷积编码以产生第一内码字。 该方法还包括作为多频带正交频分调制信号的一部分发送第一内码字。

公开(公告)号：US07372890B2

公开(公告)日：2008-05-13

申请号：US11340876

申请日：2006-01-27

申请人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Srinivas Lingam

发明人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Srinivas Lingam

IPC分类号： H04B1/00

CPC分类号： H04L27/2647 ,  H04B1/719 ,  H04W52/243

摘要： In at least some embodiments, a method for mitigating interference between an Ultra Wideband (UWB) device and a non-UWB device is provided. The method includes, dynamically determining if a frequency channel associated with the non-UWB device is being used. If the frequency channel is being used, the method adjusts a UWB frequency band used for UWB signal transmission.

摘要翻译： 在至少一些实施例中，提供了一种用于减轻超宽带（UWB）设备和非UWB设备之间的干扰的方法。 该方法包括：动态地确定是否正在使用与非UWB设备相关联的频道。 如果正在使用频道，则该方法调整用于UWB信号传输的UWB频带。

公开(公告)号：US20050078598A1

公开(公告)日：2005-04-14

申请号：US10900235

申请日：2004-07-27

申请人： Anuj Batra ,  Srinivas Lingam ,  Jaiganesh Balakrishnan

发明人： Anuj Batra ,  Srinivas Lingam ,  Jaiganesh Balakrishnan

IPC分类号： H04B1/69 ,  H04J11/00 ,  H04L5/02 ,  H04L12/56

CPC分类号： H04L5/0007 ,  H04B1/7163 ,  H04L1/0041 ,  H04L1/0059 ,  H04L5/0023 ,  H04L27/2602

摘要： This specification describes several improvements to the Multiband OFDM (MB-OFDM) Physical Layer. A new PLCP frame format that better supports interoperability between 3-band and 7-band modes is described. An expanded PHY header is described with more reserved bits for future enhancements, an even number of OFDM symbols for the PLCP header that better supports time spreading and that the information is limited to just 2 OFDM symbols. A zero prefix is used to eliminate ripe in the transmitted spectrum so there is no back off required at the transmitter. A length 160 hierarchical sequence for the packet synchronization sequence is used to help eliminate the artificial side-lobe that is created during the correlation process at the receiver with the current length 128 hierarchical packet synchronization sequence.

摘要翻译： 本规范描述了对多频带OFDM（MB-OFDM）物理层的几个改进。 描述了更好地支持3波段和7波段模式之间的互操作性的新的PLCP帧格式。 用扩展的PHY标头描述更多的保留位用于将来的增强，用于PLCP报头的偶数个OFDM符号更好地支持时间扩展，并且该信息仅限于仅2个OFDM符号。 使用零前缀来消除传输频谱中的成熟，因此在发射机上不需要后退。 用于分组同步序列的长度为160的分级序列用于帮助消除在接收机处的相关处理期间以当前长度128分级分组分组同步序列产生的人造旁瓣。

公开(公告)号：US07957760B2

公开(公告)日：2011-06-07

申请号：US12508078

申请日：2009-07-23

申请人： Anuj Batra ,  Srinivas Lingam

发明人： Anuj Batra ,  Srinivas Lingam

IPC分类号： H04B1/00 ,  H04B7/00 ,  H04Q11/12

CPC分类号： H04W52/242 ,  H04W52/08 ,  H04W52/246 ,  H04W52/283 ,  H04W52/50

摘要： The distance between a first Multi Band Orthogonal Frequency Division Multiplex (MB-OFDM) data transceiver and a second or more such transceiver is determined using known techniques. The radio frequency path loss between transceivers is estimated given said distance, using a known relationship between distance and path loss, and further accounting for line-of-sight or non-line-of-sight conditions if desired. This path loss value is added to the typically minimum transmit power level, absent path loss, needed for reliable data communication. This modified initial transmit power level is then used by the first transceiver to begin the known iterative feedback process of transmit power control (TPC). Because this modified initial transmit power level, based on distance, is closer to the final optimum level, convergence in the TPC process occurs in fewer steps and less time than had the initial transmit power been maximum power as is typical in known TPC systems.

摘要翻译： 使用已知技术确定第一多频带正交频分复用（MB-OFDM）数据收发机与第二或更多个这样的收发机之间的距离。 使用距离和路径损耗之间的已知关系，给出所述距离估计收发器之间的射频路径损耗，并且如果需要，进一步考虑视线或非视距条件。 该路径损耗值被添加到可靠数据通信所需的通常最小发射功率电平，不存在路径损耗。 该修改的初始发射功率电平然后由第一收发器用于开始已知的发射功率控制（TPC）的迭代反馈处理。 由于这种基于距离的修改的初始发射功率电平更接近于最终的最优电平，所以在已知TPC系统中典型的情况下，TPC过程中的收敛在比初始发射功率达到最大功率的步骤少，时间更短的时间内发生。

公开(公告)号：US20090280857A1

公开(公告)日：2009-11-12

申请号：US12508078

申请日：2009-07-23

申请人： Anuj Batra ,  Srinivas Lingam

发明人： Anuj Batra ,  Srinivas Lingam

IPC分类号： H04B7/005

CPC分类号： H04W52/242 ,  H04W52/08 ,  H04W52/246 ,  H04W52/283 ,  H04W52/50

摘要： The distance between a first Multi Band Orthogonal Frequency Division Multiplex (MB-OFDM) data transceiver and a second or more such transceiver is determined using known techniques. The radio frequency path loss between transceivers is estimated given said distance, using a known relationship between distance and path loss, and further accounting for line-of-sight or non-line-of-sight conditions if desired. This path loss value is added to the typically minimum transmit power level, absent path loss, needed for reliable data communication. This modified initial transmit power level is then used by the first transceiver to begin the known iterative feedback process of transmit power control (TPC). Because this modified initial transmit power level, based on distance, is closer to the final optimum level, convergence in the TPC process occurs in fewer steps and less time than had the initial transmit power been maximum power as is typical in known TPC systems.

摘要翻译： 使用已知技术确定第一多频带正交频分复用（MB-OFDM）数据收发机与第二或更多个这样的收发机之间的距离。 使用距离和路径损耗之间的已知关系，给出所述距离估计收发器之间的射频路径损耗，并且如果需要，进一步考虑视线或非视距条件。 该路径损耗值被添加到可靠数据通信所需的通常最小发射功率电平，不存在路径损耗。 该修改的初始发射功率电平然后由第一收发器用于开始已知的发射功率控制（TPC）的迭代反馈处理。 由于这种基于距离的修改的初始发射功率电平更接近于最终的最优电平，所以在已知TPC系统中典型的情况下，TPC过程中的收敛在比初始发射功率达到最大功率的步骤少，时间更短的时间内发生。

公开(公告)号：US08705336B2

公开(公告)日：2014-04-22

申请号：US11537384

申请日：2006-09-29

申请人： Jin-Meng Ho ,  Anuj Batra ,  Srinivas Lingam

发明人： Jin-Meng Ho ,  Anuj Batra ,  Srinivas Lingam

IPC分类号： H04J9/00 ,  H04L12/28

CPC分类号： H04B7/2656

摘要： A system and method are provided that are operable for network communications that promote network devices to receive a transmit request, transmit a first part of a frame by a physical layer without a second part of the frame from a medium access control layer, and request the second part of the frame by the physical layer from the medium access control layer. These systems and methods also allow, in some embodiments, for the transmitting of the second part of the frame by the physical layer with data from the medium access control layer.

摘要翻译： 提供了一种系统和方法，其可用于促进网络设备接收发送请求的网络通信，通过物理层从媒体访问控制层传送帧的第二部分而不具有帧的第二部分，并请求 帧的第二部分由媒体访问控制层的物理层。 在一些实施例中，这些系统和方法还允许具有来自介质访问控制层的数据的物理层传输帧的第二部分。

公开(公告)号：US08102187B2

公开(公告)日：2012-01-24

申请号：US12433189

申请日：2009-04-30

申请人： Anuj Batra ,  Srinivas Lingam ,  Kit Wing S. Lee ,  Clive D. Bittlestone ,  Ekanayake A. Amerasekera

发明人： Anuj Batra ,  Srinivas Lingam ,  Kit Wing S. Lee ,  Clive D. Bittlestone ,  Ekanayake A. Amerasekera

IPC分类号： H03K19/173

CPC分类号： G11C17/16 ,  G11C7/04 ,  G11C17/18 ,  G11C29/028 ,  G11C2207/2254

摘要： An integrated circuit (IC) includes self-calibrating programmable digital logic circuitry. The IC includes at least one programmable digital logic cell, wherein the first programmable digital logic cell provides (i) a plurality of different accessible circuit configurations or (ii) a voltage level controller. A self-calibration system is provided that includes at least one reference device, a measurement device for measuring at least one electrical performance parameter that can affect a processing speed of the first programmable digital logic cell or at least one parameter that can affect the electrical performance parameter using the reference device to obtain calibration data. A processing device maps the calibration data or a parameter derived therefrom to generate a control signal that is operable to select from the plurality of different accessible circuit configurations or a voltage level output to change the processing speed of the programmable digital logic cell.

摘要翻译： 集成电路（IC）包括自校准可编程数字逻辑电路。 IC包括至少一个可编程数字逻辑单元，其中第一可编程数字逻辑单元提供（i）多个不同的可访问电路配置或（ii）电压电平控制器。 提供了一种自校准系统，其包括至少一个参考装置，用于测量可影响第一可编程数字逻辑单元的处理速度的至少一个电性能参数的测量装置或可影响电性能的至少一个参数 参数使用参考设备获得校准数据。 处理设备映射校准数据或从其导出的参数，以产生可操作以从多个不同的可访问电路配置或电压电平输出中选择以改变可编程数字逻辑单元的处理速度的控制信号。

公开(公告)号：US20070099644A1

公开(公告)日：2007-05-03

申请号：US11380075

申请日：2006-04-25

申请人： Anuj Batra ,  Srinivas Lingam

发明人： Anuj Batra ,  Srinivas Lingam

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W52/242 ,  H04W52/08 ,  H04W52/246 ,  H04W52/283 ,  H04W52/50

摘要： The distance between a first Multi Band Orthogonal Frequency Division Multiplex (MB-OFDM) data transceiver and a second or more such transceiver is determined using known techniques. The radio frequency path loss between transceivers is estimated given said distance, using a known relationship between distance and path loss, and further accounting for line-of-sight or non-line-of-sight conditions if desired. This path loss value is added to the typically minimum transmit power level, absent path loss, needed for reliable data communication. This modified initial transmit power level is then used by the first transceiver to begin the known iterative feedback process of transmit power control (TPC). Because this modified initial transmit power level, based on distance, is closer to the final optimum level, convergence in the TPC process occurs in fewer steps and less time than had the initial transmit power been maximum power as is typical in known TPC systems.

摘要翻译： 使用已知技术确定第一多频带正交频分复用（MB-OFDM）数据收发机与第二或更多个这样的收发机之间的距离。 使用距离和路径损耗之间的已知关系，给出所述距离估计收发器之间的射频路径损耗，并且如果需要，进一步考虑视线或非视距条件。 该路径损耗值被添加到可靠数据通信所需的通常最小发射功率电平，不存在路径损耗。 该修改的初始发射功率电平然后由第一收发器用于开始已知的发射功率控制（TPC）的迭代反馈处理。 由于这种基于距离的修改的初始发射功率电平更接近于最终的最优电平，所以在已知TPC系统中典型的情况下，TPC过程中的收敛在比初始发射功率达到最大功率的步骤少，时间更短的时间内发生。