Method and Receiver for Identifying a Leading Edge Time Period in a Received Radio Signal
    41.
    发明申请
    Method and Receiver for Identifying a Leading Edge Time Period in a Received Radio Signal 审中-公开
    用于识别接收无线电信号中的前沿时间周期的方法和接收机

    公开(公告)号:US20090170458A1

    公开(公告)日:2009-07-02

    申请号:US11995394

    申请日:2005-07-19

    IPC分类号: H04B17/00

    CPC分类号: H04B1/71637 H04B1/7183

    摘要: A method for identifying a leading edge time period of a received radio signal includes identifying a greatest energy time period in a sequence of time periods. The received radio signal has a greatest average energy in the greatest energy time period. The method also includes identifying a least energy time period in the sequence of time periods. The received radio signal has a least average energy in the least energy time period. Further, the method includes setting a threshold energy based on the greatest average energy and the least average energy, determining a number of window time periods based on a characteristic of a radio channel used by the received radio signal, and identifying as a leading edge time period an earliest time period that precedes the greatest energy time period within the number of window time periods. The received radio signal in the leading edge time period has an average energy greater than or equal to the threshold energy.

    摘要翻译: 一种用于识别所接收的无线电信号的前沿时间段的方法包括识别时间序列中的最大能量时间段。 接收的无线电信号在最大能量时间段内具有最大的平均能量。 该方法还包括识别时间序列中的最少能量时间段。 所接收的无线电信号在最短能量时间段内具有最小平均能量。 此外,该方法包括基于最大平均能量和最小平均能量来设置阈值能量,基于由所接收的无线电信号使用的无线电信道的特性确定窗口时间段的数量,以及将其识别为前沿时间 期间是在窗口时间段内的最大能量时间段之前的最早时间段。 在前沿时间段中接收的无线电信号具有大于或等于阈值能量的平均能量。

    Transmitting Signals for Time of Arrival Estimation
    43.
    发明申请
    Transmitting Signals for Time of Arrival Estimation 有权
    发送信号到达时间估计

    公开(公告)号:US20090021420A1

    公开(公告)日:2009-01-22

    申请号:US11577129

    申请日:2005-04-22

    申请人: Zafer Sahinoglu

    发明人: Zafer Sahinoglu

    IPC分类号: G01S13/08

    摘要: A method generates (200) a radio signal to be used for ranging. For each of one of multiple frames (501,505) to be transmitted as a ranging symbol, a first time interval (560) and a second time interval (580) are allocated. The ranging symbol is then transmitted as a set of pulses in each of the frames ((501,505)) only during the first time interval (560), and the second time interval (580) has a length to reduces inter-frame interference.

    摘要翻译: 一种方法产生(200)要用于测距的无线电信号。 对于作为测距符号发送的多个帧(501,505)中的一个帧中的每一个,分配第一时间间隔(560)和第二时间间隔(580)。 然后,仅在第一时间间隔(560)期间,将测距符号作为每个帧((501,505))中的一组脉冲发送,并且第二时间间隔(580)具有减小帧间干扰的长度。

    Power and delay sensitive ad-hoc communication networks
    44.
    发明申请
    Power and delay sensitive ad-hoc communication networks 有权
    功率和延迟敏感的自组织通信网络

    公开(公告)号:US20050111428A1

    公开(公告)日:2005-05-26

    申请号:US10722031

    申请日:2003-11-25

    摘要: An ad-hoc wireless communication network includes multiple nodes. Each node maintains a routing table. The routing table is constructed by broadcasting route request packets from a source node. The request packet includes an address of a destination node. Intermediate nodes in the network receiving the request packet, determine power and delay cost associated with the intermediate node participating in the route. If the cost is less than a threshold value, then the intermediate node participates in the routing of packets for other nodes. The intermediate node then sends a reply packet back to the source node. The reply packet includes the intermediate node addresses, as well as the power and delay costs. The source can thus construct the routing table. The source node can select a particular node for transferring application data packets based on either the power cost, the delay cost or both costs.

    摘要翻译: 自组织无线通信网络包括多个节点。 每个节点维护路由表。 路由表是通过从源节点广播路由请求报文来构建的。 请求分组包括目的地节点的地址。 接收请求分组的网络中的中间节点确定与参与路由的中间节点相关联的功率和延迟成本。 如果成本小于阈值,则中间节点参与其他节点的分组路由。 然后,中间节点将回复分组发送回源节点。 应答包包括中间节点地址,以及功率和延迟成本。 因此,源可以构建路由表。 源节点可以基于电力成本,延迟成本或两者成本来选择用于传送应用数据分组的特定节点。

    Location estimation in partially synchronized networks
    45.
    发明授权
    Location estimation in partially synchronized networks 有权
    部分同步网络中的位置估计

    公开(公告)号:US06885969B2

    公开(公告)日:2005-04-26

    申请号:US10649759

    申请日:2003-08-26

    申请人: Zafer Sahinoglu

    发明人: Zafer Sahinoglu

    摘要: A method locates a mobile node in a partially synchronized wireless network comprised of nodes with heterogeneous communication ranges. The time intervals it takes for messages to travel from stationary nodes at known location to a mobile node at an unknown location are measured and used to determine a set of possible coordinates of the mobile node. This time-based set of coordinates is in the form of a hyperbolic function. The received signal strengths of a message received from the mobile node is measured in two additional stationary nodes at known location. These RSS-based measurements provide two more sets of possible coordinates of the mobile node. The three sets are then intersected to estimate the location of the mobile node.

    摘要翻译: 一种方法将移动节点定位在由具有异构通信范围的节点组成的部分同步的无线网络中。 测量消息从已知位置处的静止节点到未知位置的移动节点的时间间隔,并用于确定移动节点的一组可能的坐标。 这个基于时间的坐标系是双曲线函数的形式。 在已知位置的两个额外的固定节点中测量从移动节点接收的消息的接收信号强度。 这些基于RSS的测量提供了两组可能的移动节点坐标。 然后将三组相交,以估计移动节点的位置。

    Method and System for Detecting Unbalance in Power Grids
    46.
    发明申请
    Method and System for Detecting Unbalance in Power Grids 审中-公开
    检测电网不平衡的方法与系统

    公开(公告)号:US20130116947A1

    公开(公告)日:2013-05-09

    申请号:US13292201

    申请日:2011-11-09

    IPC分类号: G06F19/00 G01R31/00 G01R25/00

    CPC分类号: G01R29/16 H02J3/28

    摘要: A method for detecting unbalance in a 3-phase voltage signal is disclosed. The method includes determining an unbalance indicator as a value of a square of an amplitude of a positive sequence of the voltage signal; and comparing the unbalance indicator with a threshold to determine unbalance of the voltage signal.

    摘要翻译: 公开了一种用于检测三相电压信号中的不平衡的方法。 该方法包括:将不平衡指示符确定为电压信号的正序列的振幅的平方值; 以及将所述不平衡指示器与阈值进行比较以确定所述电压信号的不平衡。

    Persymmetric parametric adaptive matched filters for detecting targets using space-time adaptive processing of radar signals
    47.
    发明授权
    Persymmetric parametric adaptive matched filters for detecting targets using space-time adaptive processing of radar signals 有权
    用于使用雷达信号的空时自适应处理来检测目标的不对称参数自适应匹配滤波器

    公开(公告)号:US08284098B2

    公开(公告)日:2012-10-09

    申请号:US12954254

    申请日:2010-11-24

    IPC分类号: G01S13/00

    CPC分类号: G01S13/5244 G01S13/5242

    摘要: A method provides space-time adaptive processing (STAP) for target detection using adaptive matched filters (AMF). A generalized likelihood ratio test (GLRT) is determined where spatial and temporal correlation matrices Q and A are assumed. Then, the correlation matrices A and Q are replaced with maximum likelihood (ML) estimates obtained only from training signals subject to a persymmetric constraint.

    摘要翻译: 一种方法使用自适应匹配滤波器(AMF)提供用于目标检测的时空自适应处理(STAP)。 在假定空间和时间相关矩阵Q和A的情况下确定广义似然比检验(GLRT)。 然后,相关矩阵A和Q被替换为仅由经受不对称约束的训练信号获得的最大似然(ML)估计。

    Method for Detecting Targets Using Space-Time Adaptive Processing
    48.
    发明申请
    Method for Detecting Targets Using Space-Time Adaptive Processing 有权
    使用时空自适应处理检测目标的方法

    公开(公告)号:US20120249361A1

    公开(公告)日:2012-10-04

    申请号:US13291323

    申请日:2011-11-08

    IPC分类号: G01S13/04

    摘要: A method for detecting a target in a non-homogeneous environment using a space-time adaptive processing of a radar signal includes normalizing training data of the non-homogeneous environment to produce normalized training data; determining a normalized sample covariance matrix representing the normalized training data; tracking a subspace represented by the normalized sample covariance matrix to produce a clutter subspace matrix; determining a test statistic representing a likelihood of a presence of the target in the radar signal based on the clutter subspace matrix and a steering vector; and comparing the test statistic with a threshold to detect the target.

    摘要翻译: 使用雷达信号的时空自适应处理来检测非均匀环境中的目标的方法包括对非均匀环境的训练数据进行归一化以产生归一化的训练数据; 确定表示归一化训练数据的归一化样本协方差矩阵; 跟踪由归一化样本协方差矩阵表示的子空间以产生杂波子空间矩阵; 基于所述杂波子空间矩阵和导向矢量,确定表示所述雷达信号中所述目标的存在的可能性的测试统计量; 并将检验统计与阈值进行比较以检测目标。

    Method and network for transmitting data in a wireless network with fixed transmission intervals
    49.
    发明授权
    Method and network for transmitting data in a wireless network with fixed transmission intervals 有权
    用于以固定的传输间隔在无线网络中传输数据的方法和网络

    公开(公告)号:US08228883B2

    公开(公告)日:2012-07-24

    申请号:US12651517

    申请日:2010-01-04

    IPC分类号: H04W4/00 H04W72/00

    摘要: A wireless network master node periodically broadcasts beacons that specify a structure of a following fixed length superframe. Slave nodes determine a channel condition between each slave and the master. Then, the set of slaves is partitioned into subsets of slaves according to the channel conditions. The master assigns, to each slave, a transmission rate in a low to high order according to the channel conditions, and the slaves transmit data to the master in the low to high order between two consecutive beacons, wherein the subsets of slaves with a higher transmission rate also receive the data from the subsets of slaves with a lower transmission rate, and wherein a slave with a higher transmission rate includes a part of or all the data from a slave with a lower transmission rate.

    摘要翻译: 无线网络主节点周期性地广播指定以下固定长度超帧的结构的信标。 从节点确定每个从站和主站之间的通道状态。 然后,根据信道条件将从属单元划分成从属子集。 主设备根据信道条件将从低到高的传输速率分配给每个从站,并且从站在两个连续的信标之间以低到高顺序向主设备发送数据,其中具有较高的从站的子集 传输速率还从具有较低传输速率的从属子集接收数据,并且其中具有较高传输速率的从机包括来自具有较低传输速率的从机的部分或全部数据。

    Cooperative Ultra-Reliable Wireless Communications
    50.
    发明申请
    Cooperative Ultra-Reliable Wireless Communications 有权
    合作超可靠无线通信

    公开(公告)号:US20100254369A1

    公开(公告)日:2010-10-07

    申请号:US12419874

    申请日:2009-04-07

    IPC分类号: H04J3/16 H04L27/28

    摘要: A network includes a master node (master) and a set of slave nodes (slaves). The network uses orthogonal frequency-division multiplexing (OFDM) and time division multiple access (TDMA) symbols on sub-carriers. During a first downlink transmission from the master to the set of slaves using downlinks and all of the sub-carriers, a broadcast polling packet including data packets for each slave and sub-carrier assignments for the slaves is broadcast. Each slave transmits simultaneously to the master using uplinks and the assigned sub-carriers, a first response packet after receiving the broadcast polling packet. The master then broadcasts using the downlinks and all of the sub-carriers, a group acknowledgement packet, wherein the broadcast polling packet, the response packet, and the group acknowledgement packet include one superframe in one communication cycle, and wherein the broadcasting on the downlinks and the transmitting on the uplinks are disjoint in time.

    摘要翻译: 网络包括主节点(主节点)和一组从节点(从节点)。 该网络在子载波上使用正交频分复用(OFDM)和时分多址(TDMA)符号。 在使用下行链路和所有子载波从主机到从机组的第一次下行链路传输期间,广播包括用于每个从机的数据分组的广播轮询分组和用于从机的子载波分配。 每个从设备使用上行链路和分配的子载波同时发送到主设备,第一响应分组在接收到广播轮询分组之后。 然后主机使用下行链路和所有子载波,一组确认分组广播,其中广播轮询分组,响应分组和组确认分组在一个通信周期中包括一个超帧,并且其中在下行链路上进行广播 并且在上行链路上的发送在时间上是不相交的。