公开(公告)号：US20090290563A1

公开(公告)日：2009-11-26

申请号：US12293458

申请日：2006-03-30

申请人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

发明人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

IPC分类号： H04W84/12 ,  H04B7/02

CPC分类号： H04B7/0691 ,  H04B7/0608 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0636 ,  H04B7/0695 ,  H04B7/0874 ,  H04B7/088 ,  H04W84/12

摘要： A method selects antennas in a multiple-input, multiple-output (MIMO) wireless local area network (WLAN) that includes a plurality of stations, and each station includes a set of antennas. Plural consecutive packets, received at a station, include plural consecutive sounding packets. Each sounding packet corresponds to a different subset of the set of antennas, and at least one of the plural consecutive packets includes a high throughput (HT) control field including a signal to initiate antenna selection and a number N indicative of a number of sounding packets which follow the at least one packet including the HT control field and which are to be used for antenna selection. A channel matrix is estimated based on a characteristic of the channel as indicated by the received N sounding packets, and a subset of antennas is selected according to the channel matrix. Station and computer program product embodiments include similar features.

摘要翻译： 一种方法选择包括多个站的多输入多输出（MIMO）无线局域网（WLAN）中的天线，并且每个站包括一组天线。 在站处接收的多个连续分组包括多个连续的探测分组。 每个探测分组对应于该组天线的不同子集，并且多个连续分组中的至少一个分组包括高吞吐量（HT）控制字段，包括用于发起天线选择的信号和指示多个探测分组的数量N 其遵循至少一个包括HT控制字段并将用于天线选择的分组。 基于由接收的N个探测分组指示的信道的特性来估计信道矩阵，并且根据信道矩阵选择天线的子集。 站和计算机程序产品实施例包括类似的特征。

公开(公告)号：US20090016372A1

公开(公告)日：2009-01-15

申请号：US12117219

申请日：2008-05-08

申请人： Zhifeng Tao ,  Andreas F. Molisch ,  Philip V. Orlik ,  Jinyun Zhang ,  Shigeru Uchida ,  Kentarou Sawa

发明人： Zhifeng Tao ,  Andreas F. Molisch ,  Philip V. Orlik ,  Jinyun Zhang ,  Shigeru Uchida ,  Kentarou Sawa

IPC分类号： H04J3/16

CPC分类号： H04B7/0874 ,  H04B7/063 ,  H04B7/0691 ,  H04L5/0007

摘要： A method selects antennas in an OFDMA wireless network including a base station and a mobile station. The mobile station measures a channel state of a downlink in a downlink subframe using different subsets of available antennas, and selects a subset of receive antennas for downlink reception based on the channel states between the base station and the different subsets of antennas at the mobile station. The base station measures the channel state in an uplink using an uplink subframe received in the base station from the mobile station, and selects a subset of transmit antennas for mobile station's uplink transmission based on the channel states between the base station and different subset of antennas at the mobile station.

摘要翻译： 一种方法选择包括基站和移动台的OFDMA无线网络中的天线。 移动站使用不同的可用天线子集来测量下行链路子帧中的下行链路的信道状态，并且基于移动站的基站和不同的天线子集之间的信道状态来选择用于下行链路接收的接收天线的子集 。 基站使用来自移动站的基站中接收到的上行链路子帧来测量上行链路中的信道状态，并且基于基站和不同的天线子集之间的信道状态来选择用于移动台的上行链路传输的发射天线的子集 在移动台。

公开(公告)号：US20080212538A1

公开(公告)日：2008-09-04

申请号：US11995390

申请日：2005-07-15

申请人： Andreas F. Molisch

发明人： Andreas F. Molisch

IPC分类号： H04B7/208

CPC分类号： H04W48/10 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/061 ,  H04B7/0691 ,  H04B7/0805 ,  H04W88/00

摘要： A transmitting station in a radio network includes at least one radio frequency (RF) chain, a packet generator configured to generate a sounding packet including a number of training frames and a signaling frame, and at least one antenna element coupled to the at least one RF chain and configured to broadcast a transmit signal including the sounding packet. The packet generator produces in the sounding packet the number of training frames and the content of the signaling frame based at least in part on the number of antenna elements and the number RF chains.

摘要翻译： 无线电网络中的发射站包括至少一个射频（RF）链，分组生成器，被配置为生成包括多个训练帧和信令帧的探测分组，以及至少一个耦合到该至少一个的天线元件 RF链，并被配置为广播包括探测分组的发射信号。 分组生成器至少部分地基于天线元件的数量和数量RF链，在探测分组中产生训练帧的数量和信令帧的内容。

公开(公告)号：US07403746B2

公开(公告)日：2008-07-22

申请号：US11199023

申请日：2005-08-08

申请人： Andreas F. Molisch

发明人： Andreas F. Molisch

IPC分类号： H04B17/00

CPC分类号： H04B1/719 ,  G01S11/02 ,  H04B1/71632 ,  H04B2001/6908 ,  H04L1/0007 ,  H04L1/0019 ,  H04L25/0202

摘要： A method determines a duration of a frame in an impulse radio system for radio ranging. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame duration of the frame is then determined according to the channel state information and the signal to noise and interference ratio.

摘要翻译： 一种方法确定用于无线电测距的脉冲无线电系统中的帧的持续时间。 周期性地估计两个收发器之间的信道的信道状态信息。 周期性地估计信噪比干扰比。 然后根据信道状态信息和信噪比干扰比来确定帧的帧持续时间。

公开(公告)号：US07349458B2

公开(公告)日：2008-03-25

申请号：US10847072

申请日：2004-05-17

申请人： Sinan Gezici ,  Andreas F. Molisch ,  Hisashi Kobayashi ,  H. Vincent Poor

发明人： Sinan Gezici ,  Andreas F. Molisch ,  Hisashi Kobayashi ,  H. Vincent Poor

IPC分类号： H04B1/69

CPC分类号： H04B1/71637 ,  H04B2001/6908

摘要： In a time-hopped impulse radio system, each symbol is transmitted over a channel having different multipath components as a set of Nf frames. Each frame includes one pulse. All frames of a received signal corresponding to the symbol are sampled to generate Nf×L samples, where L is the number of samples for each frame. Then, the Nf×L samples are combined according to a minimum mean square error criterion to obtain a decision variable corresponding to the symbol.

摘要翻译： 在时间跳跃的无线电系统中，每个符号通过具有不同多路径分量的信道作为一组N帧帧发送。 每帧包括一个脉冲。 对与该符号相对应的接收信号的所有帧进行采样以产生N个样本，其中L是每个帧的采样数。 然后，根据最小均方误差准则组合N个样本，以获得对应于该符号的判定变量。

公开(公告)号：US20070274260A1

公开(公告)日：2007-11-29

申请号：US11475264

申请日：2006-06-27

申请人： Zafer Sahinoglu ,  Andreas F. Molisch

发明人： Zafer Sahinoglu ,  Andreas F. Molisch

IPC分类号： H04Q7/00

CPC分类号： H04L7/041 ,  H04J13/00

摘要： A method and apparatus for transmitting a packet in a wireless communications network is presented. A packet is constructed to include synchronization header, a physical layer header, and a payload. A preamble and a start of frame delimiter is inserted in the synchronization header. Multiple pairs of cores and of suffixes are inserted in the start of frame delimiter, and then the packet is transmitted.

摘要翻译： 提出了一种用于在无线通信网络中发送分组的方法和装置。 分组被构造为包括同步头，物理层头和有效载荷。 在同步头中插入前导码和帧定界符开始。 在帧定界符​​的起始处插入多对核心和后缀，然后传输分组。

公开(公告)号：US20150358055A1

公开(公告)日：2015-12-10

申请号：US14731196

申请日：2015-06-04

申请人： Andreas F. Molisch ,  Haralabos Papadopoulos

发明人： Andreas F. Molisch ,  Haralabos Papadopoulos

IPC分类号： H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0608 ,  H04B7/0413

摘要： A method and apparatus is disclosed herein for transmitting information in massive MIMO system. In one embodiment, the apparatus comprises a plurality of antenna elements; a baseband processor; a plurality of radio-frequency (RF) chains coupled to the baseband processor; a plurality of switches coupled to the plurality of RF chains, wherein positions of switches in the plurality of switches being determined by instantaneous channel state information; a radio-frequency (RF) preprocessor coupled between the plurality of switches and the plurality of antenna elements, the RF preprocessor to apply a preprocessing matrix to signals, elements of the preprocessing matrix being adjusted as a function of average channel state information, and wherein the positions of the switches and elements of the preprocessing matrix are jointly chosen, and wherein the preprocessing matrix is chosen based on a metric related to expected performance obtained from at least one channel realization.

摘要翻译： 本文公开了用于在大量MIMO系统中传输信息的方法和装置。 在一个实施例中，该装置包括多个天线元件; 基带处理器 耦合到所述基带处理器的多个射频（RF）链; 耦合到所述多个RF链的多个开关，其中所述多个开关中的开关的位置由瞬时信道状态信息确定; 耦合在所述多个开关和所述多个天线元件之间的射频（RF）预处理器，所述RF预处理器将预处理矩阵应用于信号，所述预处理矩阵的元素被调整为平均信道状态信息的函数，并且其中 共同选择开关和预处理矩阵的元件的位置，并且其中基于与从至少一个通道实现获得的期望性能相关的度量来选择预处理矩阵。

公开(公告)号：US08073071B2

公开(公告)日：2011-12-06

申请号：US12239491

申请日：2008-09-26

申请人： Philip V. Orlik ,  Wataru Matsumoto ,  Andreas F. Molisch ,  Zhifeng Tao ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Wataru Matsumoto ,  Andreas F. Molisch ,  Zhifeng Tao ,  Jinyun Zhang

IPC分类号： H04B7/02

CPC分类号： H04L1/0606 ,  H04L1/0662 ,  H04L1/1816

摘要： A method transmits a block of symbols in a multiple-input multiple-output (MIMO) network including a transmitter having a set of transmit antennas and a receiver having a set of receive antennas. A block of symbols is coded with a first code to generate a first block, which is transmitted and received. If a decoding of the first block is incorrect, then block of symbols is coded with the first code and then a second code different than the first code to generate a second block. The second block is transmitted, received and combined with the first block to recover the block of symbols.

摘要翻译： 一种方法在包括具有一组发射天线的发射机和具有一组接收天线的接收机的多输入多输出（MIMO）网络中发送符号块。 用第一代码编码符号块以产生被发送和接收的第一块。 如果第一块的解码不正确，则使用第一代码然后与第一代码不同的第二代码对符号块进行编码以生成第二块。 第二块被发送，接收并与第一块组合以恢复符号块。

公开(公告)号：US20100124219A1

公开(公告)日：2010-05-20

申请号：US12271200

申请日：2008-11-14

申请人： Matthew Brand ,  Andreas F. Molisch

发明人： Matthew Brand ,  Andreas F. Molisch

IPC分类号： H04L12/56

CPC分类号： H04W40/08 ,  Y02D70/22 ,  Y02D70/324

摘要： A method routs a packet from a source node, via relay nodes, to a destination node. The nodes are connected by wireless links x. A channel power gain γ is measured for each link x. Resource trade-off curves y=ƒ(x) are constructed for each link x from the channel power gains γ, wherein y represents a set of resources. A hyperbolic upper bound h/x+c is fitted to each resource curve, such that h/x+c≧ƒ(x), wherein h is a scale factor, and c is an offset. A route with an optimal resource allocation is selected according to the hyperbolic upper bounds. Then, the packet is transmitted from the source node to the destination node using the route.

摘要翻译： 方法将来自源节点的分组经由中继节点路由到目的地节点。 节点通过无线链路x连接。 对于每个链路x测量信道功率增益γ。 对于来自信道功率增益γ的每个链路x构造资源权衡曲线y =ƒ（x），其中y表示一组资源。 双曲上界h / x + c适合于每个资源曲线，使得h / x +c≥f（x），其中h是比例因子，c是偏移。 根据双曲线上界选择具有最佳资源分配的路由。 然后，使用该路由从源节点向目的地节点发送分组。

公开(公告)号：US07620369B2

公开(公告)日：2009-11-17

申请号：US11029132

申请日：2005-01-04

申请人： Andreas F. Molisch ,  Philip Orlik

发明人： Andreas F. Molisch ,  Philip Orlik

IPC分类号： H04B17/00

CPC分类号： H04B1/719 ,  H04B1/7176

摘要： A method determines a duration of a frame in a time-hopping, impulse radio system. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame duration of the frame is then determined according to the channel state information and the signal to noise and interference ratio.

摘要翻译： 一种方法确定跳时脉冲无线电系统中的帧的持续时间。 周期性地估计两个收发器之间的信道的信道状态信息。 周期性地估计信噪比干扰比。 然后根据信道状态信息和信噪比干扰比来确定帧的帧持续时间。