公开(公告)号：US07298792B2

公开(公告)日：2007-11-20

申请号：US11079305

申请日：2005-03-14

申请人： Yves-Paul Nakache ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Yves-Paul Nakache ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04L27/04

CPC分类号： H04B1/719 ,  H04B1/71632 ,  H04B1/7176 ,  H04B2001/6908 ,  H04L25/03866

摘要： A method and system eliminate spectral lines and shapes the power spectral density of an ultra bandwidth signal. First, a train of non-periodic pulses is generated. The non-periodic pulses are then modulated in time according to uncorrelated symbols. A polarity of the non-periodic pulses is inverted randomly before transmitting the non-periodic pulses as an ultra wide bandwidth signal to eliminate spectral lines and to shape a power spectral density of the ultra wide bandwidth signal.

摘要翻译： 一种方法和系统消除了光谱线，并形成了超宽带信号的功率谱密度。 首先，产生一系列非周期脉冲。 然后根据不相关的符号在时间上调制非周期脉冲。 在将非周期性脉冲作为超宽带宽信号发送之前，非周期性脉冲的极性被反转，以消除谱线并形成超宽带宽信号的功率谱密度。

公开(公告)号：US07684337B2

公开(公告)日：2010-03-23

申请号：US11333665

申请日：2006-01-17

申请人： Neelesh B. Mehta ,  Ritesh Madan ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Neelesh B. Mehta ,  Ritesh Madan ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04L12/26 ,  H04B3/36

CPC分类号： H04W40/06 ,  H04B7/026 ,  H04B7/0408 ,  H04W52/46 ,  Y02D70/322 ,  Y02D70/442 ,  Y02D70/444

摘要： A method and system for communicating information in a cooperative relay network of wireless nodes. The wireless nodes including a source, a set of relays, and a destination. Channel state information for each channel between a particular relay of the set of relays and the destination is estimated. A subset of the relays is selected based on the channel state information. The channel state information is fed back to the subset of relays. The source node can then broadcasting data packets from the source to the subset of relays, and the subset of relays forward coherently the data packets from the subset of relays to the destination using beamforming based on the channel state information, while adjusting power to minimize a total energy consumption in the network.

摘要翻译： 一种用于在无线节点的协作中继网络中传送信息的方法和系统。 无线节点包括源，一组中继和目的地。 估计该组继电器的特定继电器和目的地之间的每个通道的通道状态信息。 基于信道状态信息来选择继电器的子集。 信道状态信息反馈给继电器的子集。 源节点然后可以从源到广播数据分组到中继的子集，并且继电器的子集基于信道状态信息使用波束形成将来自中继的子集的数据分组向前转发到目的地，同时调整功率以最小化 网络总能耗。

公开(公告)号：US20090268641A1

公开(公告)日：2009-10-29

申请号：US12108863

申请日：2008-04-24

申请人： Raymond Yim ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Raymond Yim ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04B7/00

CPC分类号： H04W72/121 ,  H04W72/1289

摘要： A method switches a mobile station (MS) from a current group to a new group in a Worldwide Interoperability for Microwave Access (WiMAX) including a base station (BS). The BS operates in full duplex mode and the MS operates in half-duplex mode, such that the WiMAX network operates in semi-duplex mode. The MS receives from the BS, while the MS is in the current group, a group switching request in a downlink (DL) sub-frame. The MS also receives structural information regarding frames of the new group. The MS switches from the current group to the new group after receiving the structural information.

摘要翻译： 在包括基站（BS）的全球微波接入互操作性（WiMAX）中，一种方法将移动台（MS）从当前组切换到新组。 BS以全双工模式操作，并且MS以半双工模式操作，使得WiMAX网络以半双工模式工作。 当MS在当前组中时，MS从BS接收在下行链路（DL）子帧中的组切换请求。 MS还接收关于新组的帧的结构信息。 收到结构信息后，MS从当前组切换到新组。

公开(公告)号：US07359470B2

公开(公告)日：2008-04-15

申请号：US10939284

申请日：2004-09-10

申请人： Andreas F. Molisch ,  Jianxuan Du ,  Ye Li ,  Daqing Gu ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Jianxuan Du ,  Ye Li ,  Daqing Gu ,  Jinyun Zhang

IPC分类号： H04L7/02

CPC分类号： H04L1/0687

摘要： A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.

摘要翻译： 一种方法使在多输入多输出通信系统中将信道状态信息从接收机反馈到发射机的速率最小化。 确定发射机和接收机之间的信道的时间自相关函数。 估计通道的空间协方差信息。 然后，从接收机向发射机反馈信道状态信息的最小速率基于实际信道状态信息和估计的空间协方差信息和时间自相关函数。

公开(公告)号：US07355959B2

公开(公告)日：2008-04-08

申请号：US10856708

申请日：2004-05-28

申请人： Andreas F. Molisch ,  Ye Li ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Ye Li ,  Jinyun Zhang

IPC分类号： H04J11/00

CPC分类号： H04B1/719 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/261

摘要： A method suppresses interference in a time-frequency hopped, ultra wide bandwidth system. Signals corresponding to a transmitted symbol are received. The received signals are frequency demodulated, and a coefficient vector w that minimizes a cost function C ⁡ ( w n ) = 1 ∑ k ⁢ λ  n - k  ⁢ ∑ k ⁢ λ  n - k  ⁢ ⁢  w n H ⁢ x k - c k  2 , is estimated, where λ is a weighting factor between 0, x is a vector representing the received signals, H is a frequency response of a channel used to transmit the symbol, and c is a known training symbol. A coefficient vector, ŵn={circumflex over (R)}n−1{circumflex over (d)}n, is determined, where a correlation matrix for the received signals is R ^ n = 1 ∑ k ⁢ λ  n - k  ⁢ ∑ k ⁢ λ  n - k  ⁢ ⁢ x k ⁢ x k H , and an estimate of a crosscorrelation is d ^ n = 1 ∑ k ⁢ λ  n - k  ⁢ ∑ k ⁢ λ  n - k  ⁢ ⁢ x k ⁢ c k * . The received signals are then combined according to c ^ n = 1 C ⁡ ( w ^ n ) ⁢ w ^ n H ⁢ x n = 1 1 - w ^ n H ⁢ ⁢ d ^ n ⁢ w ^ n H ⁢ x n .

公开(公告)号：US20070293153A1

公开(公告)日：2007-12-20

申请号：US11454568

申请日：2006-06-16

申请人： Andreas F. Molisch ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04B7/00

CPC分类号： H04W64/00 ,  G01S13/767 ,  H04B1/7163 ,  H04B17/27

摘要： A method signals a quality of range estimates in a UWB network. For each range estimate, a confidence level of a range estimate is signaled, a confidence interval for the range estimate is signaled, and a confidence interval scaling factor for the confidence interval is signaled.

摘要翻译： 一种方法用信号通知UWB网络中的距离估计的质量。 对于每个范围估计，用信号通知距离估计的置信水平，用信号通知距离估计的置信区间，并且用信号通知置信区间的置信区间缩放因子。

公开(公告)号：US20110116389A1

公开(公告)日：2011-05-19

申请号：US12618235

申请日：2009-11-13

申请人： Zhifeng Tao ,  Di Wang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Di Wang ,  Jinyun Zhang

IPC分类号： H04L12/26

CPC分类号： H04W40/22 ,  H04L45/18 ,  H04W40/125 ,  H04W40/248

摘要： Embodiments of the invention disclose a system and a method for determining a rank of a node in a multi-hop wireless network, wherein the network includes a gateway node, client nodes, and relay nodes, wherein a node p(i) is a default parent of the node i having a rank, and the network uses a directed acyclic graph (DAG) topology. The method comprises steps of transmitting at least one data packet from the node to the default parent node over a wireless link; counting a number of successful transmissions of most recent transmissions of data packets; determining an expected transmission time (ETX) for the wireless link based on the number of successful transmissions in the most recent transmissions; and assigning a rank R(i) to the node based on the rank of the parent node and the ETX.

摘要翻译： 本发明的实施例公开了一种用于确定多跳无线网络中的节点的等级的系统和方法，其中所述网络包括网关节点，客户端节点和中继节点，其中节点p（i）是默认的 具有等级的节点的父节点，并且网络使用有向非循环图（DAG）拓扑。 该方法包括以下步骤：通过无线链路将来自节点的至少一个数据分组发送到默认父节点; 计数数据分组的最近传输的成功传输的数量; 基于最近传输中成功传输的数量确定无线链路的预期传输时间（ETX）; 并且基于父节点和ETX的等级将节点R（i）分配给节点。

公开(公告)号：US07903537B2

公开(公告)日：2011-03-08

申请号：US12112346

申请日：2008-04-30

申请人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

IPC分类号： H04J11/00 ,  H04J1/00 ,  H04W40/00 ,  H04W72/00 ,  H04K1/10 ,  H04K1/02 ,  H03D1/04

CPC分类号： H04L5/0032 ,  H04L5/0037 ,  H04L5/0058

摘要： A method allocates radio channel resources in an orthogonal frequency-division multiple access network including a set of base stations (BS) and a set of mobile stations (MS). For each BS, a diversity set is maintained for the sets of MS. Each BS determines possible interference at the MS based on the diversity set. A graph is constructed, in which nodes represent the sets of MS, mid each edge between a pair of nodes represents channel interference between the MS represented by the pair of nodes. A weight is assigned to each edge, which reflects interference between the two MSs connected by the edge. The interference graph is partitioned into non-overlapping clusters of nodes based on a structure of the interference graph, the potential interference, so that a sum of the weights of the edges between each cluster is maximized. Based upon the graph partitioning, the channel resources are allocated to the mobile stations in order to maximize the system capacity.

摘要翻译： 一种方法在包括一组基站（BS）和一组移动站（MS）的正交频分多址网络中分配无线电信道资源。 对于每个BS，为MS集合保持分集集合。 每个BS基于分集集确定MS处的可能干扰。 构建了一个图，其中节点表示MS集合，一对节点之间的每个边中间表示由该对节点表示的MS之间的信道干扰。 权重被分配给每个边缘，其反映由边缘连接的两个MS之间的干扰。 基于干扰图的结构，潜在的干扰，干扰图被划分成不重叠的节点簇，使得每个簇之间的边的权重之和最大化。 基于图分割，将信道资源分配给移动台，以便最大化系统容量。

公开(公告)号：US07826848B2

公开(公告)日：2010-11-02

申请号：US11931378

申请日：2007-10-31

申请人： Zhifeng Tao ,  Tairan Wang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Tairan Wang ,  Jinyun Zhang

IPC分类号： H04W36/00

CPC分类号： H04W36/18

摘要： A method and system communicates cooperatively between base stations and mobile stations in a wireless cellular network. At least two mobile stations are detected in a handover region. A diversity set is established for each mobile station in the handover region. Each diversity set identifies at least two base stations that can communicate with the associated mobile station. The at least two base stations and the at least two mobile stations are combined into members of a cooperation set. A resource is allocated to selected members of the cooperative set. The selected members are notified of the allocated resource. Then, the selected base stations of the cooperation set communicate concurrently with the selected mobile stations using the same allocated resource.

摘要翻译： 方法和系统在无线蜂窝网络中的基站和移动台之间协作通信。 在切换区域中至少检测到两个移动站。 为切换区域中的每个移动站建立分集集合。 每个分集集识别可以与相关联的移动台进行通信的至少两个基站。 所述至少两个基站和所述至少两个移动台组合成合作集的成员。 资源被分配给合作集合的选定成员。 所选成员被通知所分配的资源。 然后，使用相同的分配资源，所选择的协作集的基站与所选择的移动台同时进行通信。

公开(公告)号：US20100061469A1

公开(公告)日：2010-03-11

申请号：US12205554

申请日：2008-09-05

申请人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Yu-Jung Chang ,  Jinyun Zhang

IPC分类号： H04L27/28 ,  H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/003 ,  H04L5/0032 ,  H04L5/0067 ,  H04W16/12 ,  H04W72/0453

摘要： A method allocates frequency subchannels in an orthogonal frequency-division multiple access (OFDMA) network including a set of base stations and a set of mobile stations for each base station. A graph of nodes and edges is constructed, in which the nodes represent the mobile stations in the network, and the edges connecting the nodes represent subchannel allocation constraints to be satisfied for the mobile stations represented by the nodes. The nodes are colored with colors selected from a set of colors such that subchannel allocation constraints of a pair of nodes connected by one of the edges are satisfied. The subchannels are allocated to the mobile stations according to the colors of the corresponding the nodes.

摘要翻译： 一种方法在包括一组基站和每个基站的一组移动台的正交频分多址（OFDMA）网络中分配频率子信道。 构建节点和边缘的图，其中节点表示网络中的移动站，并且连接节点的边表示子节点分配约束，以便为由节点表示的移动站满足。 节点用从一组颜色中选择的颜色着色，使得由一个边缘连接的一对节点的子信道分配约束得到满足。 子信道根据相应节点的颜色分配给移动台。