公开(公告)号：US20050152326A1

公开(公告)日：2005-07-14

申请号：US10754796

申请日：2004-01-08

申请人： Rajiv Vijayan ,  Alok Gupta ,  Raghuraman Krishnamoorthi

发明人： Rajiv Vijayan ,  Alok Gupta ,  Raghuraman Krishnamoorthi

IPC分类号： H04L27/26 ,  H04J11/00

CPC分类号： H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

摘要： Frequency error estimation and frame synchronization are performed at a receiver in an OFDM system based on a metric that is indicative of detected pilot power. The metric may be defined based on cross-correlation between two received symbols obtained in two OFDM symbol periods. For frequency error estimation, a metric value is computed for each of multiple hypothesized frequency errors. The hypothesized frequency error for the metric value with the largest magnitude is provided as the estimated frequency error. For frame synchronization, a correlation value is obtained for each OFDM symbol period by correlating metric values obtained for NC (e.g., most recent) OFDM symbol periods with NC expected values. The expected values are computed in a manner consistent with the manner in which the metric values are computed. Peak detection is performed on the correlation values obtained for different OFDM symbol periods to determine frame synchronization.

摘要翻译： 基于指示检测到的导频功率的度量，在OFDM系统中的接收机处执行频率误差估计和帧同步。 可以基于在两个OFDM符号周期中获得的两个接收符号之间的互相关来定义度量。 对于频率误差估计，针对多个假设的频率误差中的每一个计算度量值。 提供具有最大幅度的度量值的假设频率误差作为估计的频率误差。 对于帧同步，通过将针对N N C C（例如，最近的）OFDM符号周期获得的度量值与N C 3期望值相关联，获得每个OFDM符号周期的相关值 。 以与计算度量值的方式一致的方式计算期望值。 对针对不同的OFDM符号周期获得的相关值执行峰值检测以确定帧同步。

公开(公告)号：US20050063298A1

公开(公告)日：2005-03-24

申请号：US10931324

申请日：2004-08-31

申请人： Fuyun Ling ,  Alok Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Rajiv Vijayan ,  Bojan Vrcelj

发明人： Fuyun Ling ,  Alok Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Rajiv Vijayan ,  Bojan Vrcelj

IPC分类号： H04B3/10 ,  H04J20060101 ,  H04J1/16 ,  H04J11/00

CPC分类号： H04L27/2657 ,  H04L5/005 ,  H04L25/022 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2665 ,  H04L2027/003

摘要： In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2>L1, S1·L1=N, and S2·L2=N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).

摘要翻译： 在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。 每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含 至少S2个长度为L2的导频-2序列，其中L2> L1，S1.L1 = N，S2.L2 = N。 发射机还可以广播FDM导频。 接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始 从第二TDM导频）。

公开(公告)号：US20070070971A1

公开(公告)日：2007-03-29

申请号：US11495480

申请日：2006-07-27

申请人： Fuyun Ling ,  Murali Chari ,  Rajiv Vijayan ,  Ashok Mantravadi ,  Alok Gupta ,  Krishna Mukkavilli ,  Michael Wang ,  Bojan Vrcelj ,  Bruce Collins

发明人： Fuyun Ling ,  Murali Chari ,  Rajiv Vijayan ,  Ashok Mantravadi ,  Alok Gupta ,  Krishna Mukkavilli ,  Michael Wang ,  Bojan Vrcelj ,  Bruce Collins

IPC分类号： H04J3/24 ,  H04L12/56

CPC分类号： H04L1/0002 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0075 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/2662 ,  H04L69/32 ,  H04W48/08 ,  H04W72/005 ,  H04W80/00 ,  H04W88/02 ,  H04W92/10

摘要： Systems and methods are provided for processing forward link only (FLO) signals. A device receives a FLO signal, processes a TDM pilot comprising a TDM Pilot 1, a TDM Pilot 2, a WIC, a LIC, a Transition Pilot Channel, and a Positioning Pilot, from the FLO signal, processes an overhead information symbol (OIS) comprising a wide-area OIS and a local-area OIS, from the FLO signal, processes an FDM pilot comprising a wide-area FDM pilot and a local-area FDM pilot, from the FLO signal; and processes data comprising wide-area data and local-area data, from the FLO signal.

摘要翻译： 提供系统和方法用于仅处理前向链路（FLO）信号。 设备接收FLO信号，从FLO信号处理包括TDM导频1，TDM导频2，WIC，LIC，转换导频信道和定位导频的TDM导频，处理开销信息符号（OIS ）包括来自FLO信号的广域OIS和局域OIS，从FLO信号处理包括广域FDM导频和本地FDM导频的FDM导频; 并从FLO信号处理包括广域数据和局域数据的数据。

公开(公告)号：US08688926B2

公开(公告)日：2014-04-01

申请号：US13270084

申请日：2011-10-10

申请人： Jason Breakstone ,  Alok Gupta ,  Himanshu Desai ,  Angelo Campos

发明人： Jason Breakstone ,  Alok Gupta ,  Himanshu Desai ,  Angelo Campos

IPC分类号： G06F13/00

CPC分类号： G06F3/0613 ,  G06F1/08 ,  G06F1/30 ,  G06F3/0604 ,  G06F3/0625 ,  G06F3/0653 ,  G06F3/0659 ,  G06F3/0665 ,  G06F3/0685 ,  G06F3/0688 ,  G06F13/4022 ,  G06F13/4282 ,  Y02D10/14 ,  Y02D10/151

摘要： A solid state storage device includes an interface system configured to communicate with an external host system over an aggregated multi-channel interface to receive data for storage by the solid state storage device. The solid state storage device also includes a storage processing system configured to communicate with the interface system to receive the data, process the data against storage allocation information to parallelize the data among a plurality of solid state memory subsystems, and transfer the parallelized data. The interface system is configured to receive the parallelized data, apportion the parallelized data among the plurality of solid state memory subsystems, and transfer the parallelized data for storage in the plurality of solid state memory subsystems, where each of the plurality of solid state memory subsystems is configured to receive the associated portion of the parallelized data and store the associated portion on a solid state storage medium.

摘要翻译： 固体存储装置包括：接口系统，被配置为通过聚合的多通道接口与外部主机系统进行通信，以接收由固态存储设备存储的数据。 固态存储装置还包括被配置为与接口系统进行通信以接收数据的存储处理系统，针对存储分配信息处理数据以并行化多个固态存储器子系统中的数据，并传送并行化数据。 接口系统被配置为接收并行数据，分配多个固态存储器子系统中的并行化数据，并将并行化数据传送到多个固态存储器子系统中，其中多个固态存储器子系统 被配置为接收并行化数据的相关部分并将相关部分存储在固态存储介质上。

公开(公告)号：US20130297865A1

公开(公告)日：2013-11-07

申请号：US13463720

申请日：2012-05-03

申请人： Alok Gupta

发明人： Alok Gupta

IPC分类号： G06F12/00

CPC分类号： G11C5/066 ,  G11C7/1075 ,  G11C7/22

摘要： One embodiment sets forth a technique for time-multiplexed communication for transmitting command and address information between a controller and a multi-port memory device over a single connection. Command and address information for each port of the multi-port memory device is time-multiplexed within the controller to produce a single stream of commands and addresses for different memory requests. The single stream of commands and addresses is transmitted by the controller to the multi-port memory device where the single stream is demultiplexed to generate separate streams of commands and addresses for each port of the multi-port memory device.

摘要翻译： 一个实施例提出了一种用于时间复用通信的技术，用于通过单个连接在控制器和多端口存储器设备之间发送命令和地址信息。 多端口存储器设备的每个端口的命令和地址信息在控制器内进行时间复用，以产生用于不同存储器请求的单个命令和地址流。 命令和地址的单个流由控制器发送到多端口存储设备，其中单个流被解复用以为多端口存储器设备的每个端口生成单独的命令和地址流。

公开(公告)号：US20130297864A1

公开(公告)日：2013-11-07

申请号：US13463717

申请日：2012-05-03

申请人： Alok Gupta

发明人： Alok Gupta

IPC分类号： G06F12/02

CPC分类号： G11C7/1042 ,  G11C7/1072 ,  G11C7/1075 ,  G11C7/22 ,  G11C11/4076

摘要： One embodiment sets forth a technique for time-multiplexed communication for transmitting command and address information between a controller and a multi-port memory device over a single connection. Command and address information for each port of the multi-port memory device is time-multiplexed within the controller to produce a single stream of commands and addresses for different memory requests. The single stream of commands and addresses is transmitted by the controller to the multi-port memory device where the single stream is demultiplexed to generate separate streams of commands and addresses for each port of the multi-port memory device.

公开(公告)号：US20130151796A1

公开(公告)日：2013-06-13

申请号：US13316386

申请日：2011-12-09

申请人： Alok Gupta

发明人： Alok Gupta

IPC分类号： G06F12/00 ,  G06F13/12

CPC分类号： G06F13/12 ,  G06F12/12 ,  G06F13/4234 ,  G11C2029/3602

摘要： A system and method for calibration of serial links using serial-to-parallel loopback. Embodiments of the present invention are operable for calibrating serial links using parallel links thereby reducing the number of links that need calibration. The method includes sending serialized data over a serial interface and receiving parallel data via a parallel interface. The serialized data is looped back via the parallel interface. The method further includes comparing the parallel data and the serialized data for a match thereof and calibrating the serial interface by adjusting the sending of the serialized data until the comparing detects the match. The adjusting of the sending is operable to calibrate the sending of the serialized data over the serial interface.

摘要翻译： 一种使用串行到并行环回校准串行链路的系统和方法。 本发明的实施例可用于使用并行链路校准串行链路，从而减少需要校准的链路的数量。 该方法包括通过串行接口发送串行数据，并通过并行接口接收并行数据。 序列化数据通过并行接口环回。 该方法还包括比较并行数据和串行数据以进行匹配，并通过调整串行化数据的发送来校准串行接口，直到比较检测到匹配为止。 发送的调整可以通过串行接口校准串行化数据的发送。

公开(公告)号：US08407441B2

公开(公告)日：2013-03-26

申请号：US13111446

申请日：2011-05-19

申请人： Thomas J. Giovannini ,  Alok Gupta ,  Ian Shaeffer ,  Steven C. Woo

发明人： Thomas J. Giovannini ,  Alok Gupta ,  Ian Shaeffer ,  Steven C. Woo

IPC分类号： G06F12/00

CPC分类号： G11C11/4076 ,  G06F1/08 ,  G06F3/0629 ,  G06F3/0634 ,  G06F5/06 ,  G06F12/0646 ,  G06F13/1689 ,  G11C7/1078 ,  G11C7/1087 ,  G11C7/1093 ,  G11C11/409 ,  G11C11/4096 ,  G11C2207/2254

摘要： A system that calibrates timing relationships between signals involved in performing write operations is described. This system includes a memory controller which is coupled to a set of memory chips, wherein each memory chip includes a phase detector configured to calibrate a phase relationship between a data-strobe signal and a clock signal received at the memory chip from the memory controller during a write operation. Furthermore, the memory controller is configured to perform one or more write-read-validate operations to calibrate a clock-cycle relationship between the data-strobe signal and the clock signal, wherein the write-read-validate operations involve varying a delay on the data-strobe signal relative to the clock signal by a multiple of a clock period.

公开(公告)号：US07965869B2

公开(公告)日：2011-06-21

申请号：US12401909

申请日：2009-03-11

申请人： Xiang Zhou ,  Bogdan Georgescu ,  Dorin Comaniciu ,  R. Bharat Rao ,  Alok Gupta

发明人： Xiang Zhou ,  Bogdan Georgescu ,  Dorin Comaniciu ,  R. Bharat Rao ,  Alok Gupta

IPC分类号： G06K9/00 ,  G06K9/46 ,  G06K9/36

CPC分类号： G06K9/6206 ,  G06K9/6256 ,  G06T7/12 ,  G06T7/149 ,  G06T7/251 ,  G06T2207/10132 ,  G06T2207/30048

摘要： A detection framework that matches anatomical structures using appearance and shape is disclosed. A training set of images are used in which object shapes or structures are annotated in the images. A second training set of images represents negative examples for such shapes and structures, i.e., images containing no such objects or structures. A classification algorithm trained on the training sets is used to detect a structure at its location. The structure is matched to a counterpart in the training set that can provide details about the structure's shape and appearance.

摘要翻译： 公开了一种使用外观和形状匹配解剖结构的检测框架。 使用图像的训练集，其中在图像中注释对象形状或结构。 图像的第二训练集表示这种形状和结构的负面例子，即不包含这样的对象或结构的图像。 训练集训练的分类算法用于检测其位置的结构。 该结构与训练集中的对应物匹配，可以提供关于结构形状和外观的细节。

公开(公告)号：US20080044068A1

公开(公告)日：2008-02-21

申请号：US11465386

申请日：2006-08-17

申请人： Carl J. G. Evertsz ,  Anke Bodicker ,  Sriram Krishnan ,  Balaji Krishnapuram ,  R. Bharat Rao ,  Dennis O'Dell ,  Alok Gupta

发明人： Carl J. G. Evertsz ,  Anke Bodicker ,  Sriram Krishnan ,  Balaji Krishnapuram ,  R. Bharat Rao ,  Dennis O'Dell ,  Alok Gupta

IPC分类号： G06K9/00 ,  G06F3/00

CPC分类号： G06T7/0012 ,  G06F19/00 ,  G06F19/321 ,  G06T2207/30068

摘要： A method and an apparatus display marks in an image data set, wherein an image data set comprising marks is provided and wherein during a review phase not all marks within the image data set are displayed at the same time. A list of the marks can be generated by sorting the marks depending on a predetermined sorting criterion and wherein the marks are displayed temporally one after another within the image data set in accordance with the generated list. The image data set is for example a medical image data set, wherein the marks are CAD marks and wherein the sorting criterion is the probability of marking illness, in particular the suspiciousness.

摘要翻译： 方法和装置在图像数据组中显示标记，其中提供了包括标记的图像数据组，并且其中在检查阶段期间不是同时显示图像数据集内的所有标记。 可以通过根据预定的分类标准对标记进行排序来生成标记的列表，并且其中根据所生成的列表，在图像数据集中，这些标记在时间上依次显示。 图像数据集是例如医学图像数据集，其中标记是CAD标记，其中分类标准是标记疾病的概率，特别是可疑性。