公开(公告)号：US20120140922A1

公开(公告)日：2012-06-07

申请号：US12962449

申请日：2010-12-07

申请人： Ramesh Annavajjala ,  Wei Liu ,  Chunjie Duan ,  Toshiaki Koike-Akino ,  Yige Wang

发明人： Ramesh Annavajjala ,  Wei Liu ,  Chunjie Duan ,  Toshiaki Koike-Akino ,  Yige Wang

IPC分类号： H04W12/04

CPC分类号： H04L9/0875 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04

摘要： The first and second nodes in a wireless network estimate first and second channel response. The first node quantizes the first channel response to produce a first bit sequence, and a feed-forward message, which is transmit as a feed-forward message to the second node. The second node quantizes the second channel response using the feed-forward message to produce and an estimate of the first bit sequence, a second bit sequence and a feed-back message, which is transmitted to the first node. Then, the first and second nodes delete bits in the respective bit sequences using the feed-back and feed-forward message to generate first and second private keys with low bit mismatch rate.

摘要翻译： 无线网络中的第一和第二节点估计第一和第二信道响应。 第一节点量化第一信道响应以产生第一比特序列，以及作为前馈消息作为第二节点发送的前馈消息。 第二节点使用前馈消息量化第二信道响应，以产生第一比特序列，第二比特序列和反馈消息的估计，其被发送到第一节点。 然后，第一和第二节点使用反馈和前馈消息删除各个比特序列中的比特，以产生具有低比特失配率的第一和第二私钥。

公开(公告)号：US20110075707A1

公开(公告)日：2011-03-31

申请号：US12571191

申请日：2009-09-30

申请人： Chunjie Duan ,  Weihua Gao

发明人： Chunjie Duan ,  Weihua Gao

IPC分类号： H04B1/707

CPC分类号： H04L25/03343 ,  H04L5/0044 ,  H04L25/03821 ,  H04L27/2601

摘要： Embodiments of the invention disclose a system and a method for reducing inter-carrier interference (ICI) in a network, wherein the network uses orthogonal frequency division multiplexing (OFDM). The method generates, in a transmitter, a diversified signal, wherein a diversified signal includes diversified elements representing data elements, such that each data element is represented by a number of diversified elements, wherein the number equals a degree of diversity. The diversified signal is modified based on an orthogonal matrix producing a spread signal, wherein columns of the orthogonal matrix are formed by vectors, wherein the vectors are orthogonal or quasi-orthogonal to each others, and the spread signal is transmitted in the network.

摘要翻译： 本发明的实施例公开了一种用于减少网络中的载波间干扰（ICI）的系统和方法，其中网络使用正交频分复用（OFDM）。 该方法在发射机中产生多样化信号，其中多样化信号包括表示数据元素的多样化元素，使得每个数据元素由多个多样化元素表示，其中该数目等于分集度。 基于产生扩展信号的正交矩阵修改多样化信号，其中正交矩阵的列由向量形成，其中矢量彼此正交或准正交，并且扩展信号在网络中传输。

公开(公告)号：US20090213816A1

公开(公告)日：2009-08-27

申请号：US12193911

申请日：2008-08-19

申请人： Jianlin Guo ,  Chunjie Duan ,  Ghulam M. Bhatti ,  Jinyun Zhang

发明人： Jianlin Guo ,  Chunjie Duan ,  Ghulam M. Bhatti ,  Jinyun Zhang

IPC分类号： H04J3/00

CPC分类号： H04W72/0446 ,  H04B7/2656 ,  H04W48/08 ,  H04W74/02 ,  H04W84/12

摘要： A method for transmitting information in a communication network of multiple nodes, in which information transmission is partitioned into successive superframes, and in which each superframe is partitioned into a beacon period followed by a data period, which may consist of a contention free period (CFP), and each beacon period and CFP of the data period is partitioned into timeslots. The method includes allocating to at least a first node of the multiple nodes a designated timeslot in which to transmit data in at least one of a plurality of superframes, and allocating to at least a second node of the multiple nodes the same designated timeslot in which to transmit information during at least one subsequent superframe.

摘要翻译： 一种用于在多个节点的通信网络中发送信息的方法，其中信息传输被划分为连续的超帧，并且其中每个超帧被划分成信标周期，随后是数据周期，数据周期可以包括无争用周期（CFP ），并且将数据周期的每个信标周期和CFP划分为时隙。 该方法包括向多个节点中的至少第一节点分配指定时隙，在多个节点中的至少一个超帧中发送数据，并且向多个节点的至少第二节点分配相同的指定时隙，其中 以在至少一个后续超帧期间传送信息。

公开(公告)号：US08942120B2

公开(公告)日：2015-01-27

申请号：US13480349

申请日：2012-05-24

申请人： Koike-Akino Toshiaki ,  Chunjie Duan

发明人： Koike-Akino Toshiaki ,  Chunjie Duan

IPC分类号： H04L12/26 ,  H04W24/00

CPC分类号： H04W24/00 ,  H04L2463/143 ,  H04W24/08 ,  H04W84/18

摘要： Nodes in an ad hoc mobile network are monitored to provide secure routing of packets. Malicious or selfish behaviors by nodes are used to maintain and distribute node reputations. Based on the reputation, the most secure route, which can have multiple paths, is selected for packet communications. In conjunction with secure routing, a forward error correction code is adaptively optimized according to the reputation through every adjacent nodes along the route to avoid eavesdropping and falsification by malicious nodes.

摘要翻译： 监视自组织移动网络中的节点以提供分组的安全路由。 节点使用恶意或自私的行为来维护和分发节点信誉。 基于信誉，选择可以具有多条路径的最安全的路由进行数据包通信。 结合安全路由，根据沿着路由的每个相邻节点的信誉，自适应地优化前向纠错码，以避免恶意节点的窃听和伪造。

公开(公告)号：US20130141156A1

公开(公告)日：2013-06-06

申请号：US13567749

申请日：2012-08-06

申请人： Koon Hoo Teo ,  Peijie Feng ,  Chunjie Duan ,  Toshiyuki Oishi ,  Nakayama Masatoshi

发明人： Koon Hoo Teo ,  Peijie Feng ,  Chunjie Duan ,  Toshiyuki Oishi ,  Nakayama Masatoshi

IPC分类号： H01L29/778 ,  G05F1/00

CPC分类号： H01L29/7783 ,  H01L29/2003 ,  H01L2924/0002 ,  H01L2924/00

摘要： A device includes a source for transmitting an electronic charge through a conduction path; a drain for receiving the electronic charge; a stack for providing at least part of the conduction path; and a gate operatively connected to the stack for controlling a conduction of the electronic charge. The stack includes an insulator layer, an N-polar layer and a barrier layer selected such that, during an operation of the device, the conduction path formed in the N-polar layer includes a two-dimensional electron gas (2DEG) channel and an inversion carrier channel.

摘要翻译： 一种装置包括用于通过导电路径发送电荷的源; 用于接收电子费用的排水口; 用于提供所述传导路径的至少一部分的堆叠; 以及可操作地连接到所述堆叠的门，用于控制所述电子电荷的导通。 该堆叠包括绝缘体层，N极层和阻挡层，其被选择为使得在器件的操作期间，形成在N极层中的导电路径包括二维电子气（2DEG）通道和 反向载波信道。

公开(公告)号：US20120207027A1

公开(公告)日：2012-08-16

申请号：US13026336

申请日：2011-02-14

申请人： Chunjie Duan ,  Yige Wang

发明人： Chunjie Duan ,  Yige Wang

IPC分类号： H04L12/26

CPC分类号： H04L43/0847 ,  H03M13/09 ,  H03M13/3769 ,  H03M13/451 ,  H03M13/6306 ,  H04L1/0045 ,  H04L1/0061

摘要： Undetectable errors in packets are minimized by verifying the CRC in each packet, setting a CRC flag to 0 to indicate success, and setting the CRC flag to 1 to indicate failure. If at least one packet in the set of packets fails then generate an error pattern E for each packet by comparing the packet that fails with one packet that passed the CRC verification, and comparing the error pattern to a set of known error patterns. Then, setting a CRC flag to 0 to indicate success and passing the payload of each packet and the CRC flag to the application if the difference is less than a predetermined threshold, and otherwise, setting the CRC flag to 1 to indicate failure.

摘要翻译： 通过验证每个分组中的CRC，将CRC标志设置为0以指示成功，并将CRC标志设置为1以指示故障，使分组中的不可检测的错误最小化。 如果该组数据包中的至少一个数据包失败，则通过将失败的数据包与通过CRC验证的一个数据包进行比较，并将错误模式与一组已知错误模式进行比较，为每个数据包生成错误模式E. 然后，如果差小于预定阈值，则将CRC标志设置为0以指示成功并将每个分组的有效载荷和CRC标志传递给应用，否则将CRC标志设置为1以指示故障。

公开(公告)号：US08179251B2

公开(公告)日：2012-05-15

申请号：US12571399

申请日：2009-09-30

申请人： Nayef Alsindi ,  Chunjie Duan ,  Jinyun Zhang

发明人： Nayef Alsindi ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： G08B1/08

CPC分类号： G01S5/0289

摘要： A wireless sensor network includes an initial set of anchors at known locations, and a set of sensors at unknown locations. Ranges, from each sensor to at least three of the anchors, determine a position, an anchor ranging weight, and an anchor position weight. For each anchor, the anchor ranging weight and the anchor position weight form a combined weight. A weighted least square (WLS) function for the positions and the combined weights is minimized to determine a position of the sensor, and a sensor position weight. The sensor is identified as being a member of a set of candidate anchor nodes, and the candidate anchor node with a largest sensor position weight is selected to be transformed to another anchor to minimize propagation of errors in the positions of the set of sensors.

摘要翻译： 无线传感器网络包括在已知位置处的初始锚点集合，以及在未知位置处的一组传感器。 从每个传感器到至少三个锚的范围确定位置，锚定测距重量和锚定位置重量。 对于每个锚，锚定距离权重和锚位置权重形成组合重量。 用于位置和组合权重的加权最小二乘（WLS）功能被最小化以确定传感器的位置和传感器位置权重。 传感器被识别为一组候选锚节点的成员，并且选择具有最大传感器位置权重的候选锚节点以被变换到另一个锚点，以最小化传感器组中位置误差的传播。

公开(公告)号：US08155166B2

公开(公告)日：2012-04-10

申请号：US12571191

申请日：2009-09-30

申请人： Chunjie Duan ,  Weihua Gao

发明人： Chunjie Duan ,  Weihua Gao

IPC分类号： H04B1/00

CPC分类号： H04L25/03343 ,  H04L5/0044 ,  H04L25/03821 ,  H04L27/2601

摘要： Embodiments of the invention disclose a system and a method for reducing inter-carrier interference (ICI) in a network, wherein the network uses orthogonal frequency division multiplexing (OFDM). The method generates, in a transmitter, a diversified signal, wherein a diversified signal includes diversified elements representing data elements, such that each data element is represented by a number of diversified elements, wherein the number equals a degree of diversity. The diversified signal is modified based on an orthogonal matrix producing a spread signal, wherein columns of the orthogonal matrix are formed by vectors, wherein the vectors are orthogonal or quasi-orthogonal to each others, and the spread signal is transmitted in the network.

摘要翻译： 本发明的实施例公开了一种用于减少网络中的载波间干扰（ICI）的系统和方法，其中网络使用正交频分复用（OFDM）。 该方法在发射机中产生多样化信号，其中多样化信号包括表示数据元素的多样化元素，使得每个数据元素由多个多样化元素表示，其中该数目等于分集度。 基于产生扩展信号的正交矩阵修改多样化信号，其中正交矩阵的列由向量形成，其中矢量彼此正交或准正交，并且扩展信号在网络中传输。

公开(公告)号：US08126405B2

公开(公告)日：2012-02-28

申请号：US12368813

申请日：2009-02-10

申请人： Chunjie Duan ,  Nayef Alsindi ,  Jinyun Zhang

发明人： Chunjie Duan ,  Nayef Alsindi ,  Jinyun Zhang

IPC分类号： H04B17/00

CPC分类号： H04L1/20 ,  H04B17/318

摘要： A method measures a time from transmitting a ranging signal to receiving the ranging signal via a channel of a wireless network, and a received signal strength (RSS) of the ranging signal. A distance is estimated based on the time, and a path loss based on the RSS. Probabilities of conditions of the channel are estimated based on the distance and the path loss, wherein the condition is in one of line-of-sight (LOS), or non-LOS (NLOS).

摘要翻译： 一种方法测量从发送测距信号到经由无线网络的信道接收测距信号的时间，以及测距信号的接收信号强度（RSS）。 基于时间估计距离，并且基于RSS的路径损耗。 基于距离和路径损耗来估计信道条件的概率，其中条件是视线（LOS）或非LOS（NLOS）之一。

公开(公告)号：US07969963B2

公开(公告)日：2011-06-28

申请号：US11959974

申请日：2007-12-19

申请人： Chunjie Duan ,  Giovanni Vannucci

发明人： Chunjie Duan ,  Giovanni Vannucci

IPC分类号： H04J3/06 ,  G01S3/02

CPC分类号： G01S13/765

摘要： A method and system improves two-way radio ranging accuracy by estimating a relative clock frequency offset between a first clock X of a first transceiver and a second clock Y a second transceiver. The first transceiver transmits a first packet at time t0 received by the second transceiver at a time t1. The second transceiver transmits a second packet at a time t2 received by first transceiver at a time t3. The second transceiver transmits a third packet at a time t4 received at a time t5. The relative clock frequency offset is then Δ ⁢ ⁢ f XY ′ ≅ 2 ⁢ ⁢ f ⁡ ( N 24 Y - N 35 X ) N 24 Y + N 35 X , where f is a nominal clock frequency of the first and second clocks, NY24 is a measured first delay between times t2 and t4 of the second clock, NX35 is a measured second delay between times t3 and t5 of the first clock X.

摘要翻译： 方法和系统通过估计第一收发器的第一时钟X和第二时钟Y之间的相对时钟频率偏移和第二收发器来改善双向无线电测距精度。 第一收发器在时间t1发送由第二收发器接收的时间t0的第一分组。 第二收发器在时间t3在由第一收发器接收的时间t2发送第二分组。 第二收发器在时间t5接收的时间t4发送第三个分组。 相对时钟频率偏移为＆Dgr; （n 24 Y - N 35 X）N 24 Y + N 35 X，其中f是第一和第二时钟的标称时钟频率，NY24是时间之间的测量的第一延迟 t2和t4，NX35是第一时钟X的时间t3和t5之间的测量的第二延迟。