公开(公告)号：US20090124290A1

公开(公告)日：2009-05-14

申请号：US11937883

申请日：2007-11-09

申请人： Zhifeng Tao ,  Tairan Wang ,  Andreas F. Molisch ,  Philip V. Orlik ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Tairan Wang ,  Andreas F. Molisch ,  Philip V. Orlik ,  Jinyun Zhang

IPC分类号： H04M1/00

CPC分类号： H04B7/0874 ,  H04B7/0452 ,  H04B7/0691 ,  H04B7/0808

摘要： A method for selects antennas in a spatial division multiple access (SDMA) wireless network that includes a base station and a set of mobile stations, in which the set of mobile stations includes one or more designated mobile stations, and in which each designated mobile station has a set of multiple antennas. Channel state information (CSI) is acquired for a channel between each mobile station in the set of mobile stations and the base station, and in which the CSI for each designated mobile station is acquired for different subsets of the set of multiple antennas at each designated mobile station. For each designated mobile station, a globally optimal subset of the set of antennas is selected based on the CSI acquired from all the mobile stations.

摘要翻译： 一种用于在包括基站和一组移动台的空分多址（SDMA）无线网络中选择天线的方法，其中所述一组移动站包括一个或多个指定的移动站，并且其中每个指定的移动站 有一套多个天线。 对于移动站组和基站中的每个移动站之间的信道获取信道状态信息（CSI），并且其中为每个指定的多个天线集合的不同子集获取每个指定的移动站的CSI 移动台。 对于每个指定的移动站，基于从所有移动站获取的CSI来选择该组天线的全局最佳子集。

公开(公告)号：US20090086690A1

公开(公告)日：2009-04-02

申请号：US12094441

申请日：2005-11-21

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

CPC分类号： H04B7/0417 ,  H04B7/0691 ,  H04B7/0874 ,  H04L1/0025 ,  H04L5/0023

摘要： A computer implemented method selects antennas in a multiple-input, multiple-output wireless local area network that includes multiple stations, and each station includes a set of antennas. Multiple consecutively transmitted sounding packets are received in a station. Each sounding packet corresponds to a different subset of the set of antennas. A channel matrix is estimated from the multiple consecutively transmitted sounding packets. A frame including a high throughput (HT) control field is sent to initiate a selecting of antennas, and a subset of antennas is selected according to the channel matrix.

摘要翻译： 计算机实现的方法选择包括多个站的多输入多输出无线局域网中的天线，并且每个站包括一组天线。 在站中接收到多个连续发送的探测包。 每个探测包对应于该组天线的不同子集。 从多个连续发送的探测包估计信道矩阵。 发送包括高吞吐量（HT）控制字段的帧以发起天线的选择，并且根据信道矩阵选择天线子集。

公开(公告)号：US07436909B2

公开(公告)日：2008-10-14

申请号：US10988764

申请日：2004-11-15

申请人： Zafer Sahinoglu ,  Sinan Gezici ,  Andreas F. Molisch

发明人： Zafer Sahinoglu ,  Sinan Gezici ,  Andreas F. Molisch

IPC分类号： H04L27/06

CPC分类号： H04B1/7183

摘要： A method estimates a time of arrival of a signal received in a wireless communication system. An energy in a frame of a received signal is measured to determine a block in the frame, the block representing a coarse time of arrival of the received signal. Multiple time-delayed versions of a template signal are combined with the block of the received signal to select a particular template signal. The particular template signal identifies a particular chip representing a fine time of arrival of the received signal.

摘要翻译： 方法估计在无线通信系统中接收的信号的到达时间。 测量接收信号的帧中的能量以确定帧中的块，该块表示接收信号的粗略到达时间。 模板信号的多个时间延迟版本与接收信号的块组合以选择特定的模板信号。 特定模板信号识别表示接收信号的精确到达时间的特定芯片。

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：US09705579B2

公开(公告)日：2017-07-11

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： H04B7/02 ,  H04B7/06 ,  H04B7/0413

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.

公开(公告)号：US07826853B2

公开(公告)日：2010-11-02

申请号：US11934131

申请日：2007-11-02

申请人： Andreas F. Molisch ,  Lun Dong ,  Philip V. Orlik ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Lun Dong ,  Philip V. Orlik ,  Jinyun Zhang

IPC分类号： H04W72/00

CPC分类号： H04B7/0678 ,  H04B7/024 ,  H04B7/043 ,  H04B7/0443

摘要： The embodiments of the invention provide an adaptive method for base station cooperation in a wireless network. In a multi-user communications network that includes base stations, and in which each base station is associated with a cell, and in which each cell includes one or more mobile stations, each base station determines pre-coding matrices for full-cooperation, semi-cooperation and non-cooperation. Each base stations also determines a sum rate SRfull for full-cooperation, a sum rate SRsemi for semi-cooperation, and a sum rate SRnon for non-cooperation. Then, each base station selects the pre-coding for full-cooperation, the pre-coding matrices for semi cooperation, or the pre-coding matrices for non cooperation. Each base station transmits signals according to the selected pre-coding matrices.

摘要翻译： 本发明的实施例提供了一种用于无线网络中的基站协作的自适应方法。 在包括基站并且其中每个基站与小区相关联并且每个小区包括一个或多个移动站的多用户通信网络中，每个基站确定用于全协作的预编码矩阵，半 合作不合作。 每个基站还确定全面合作的总和速率，半合作的总和SRsemi和不合作的总和速率SRnon。 然后，每个基站选择用于全协作的预编码，用于半合作的预编码矩阵，或者用于非合作的预编码矩阵。 每个基站根据选择的预编码矩阵发送信号。

公开(公告)号：US20100254369A1

公开(公告)日：2010-10-07

申请号：US12419874

申请日：2009-04-07

申请人： Zhifeng Tao ,  Philip V. Orlik ,  Zafer Sahinoglu ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Philip V. Orlik ,  Zafer Sahinoglu ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04J3/16 ,  H04L27/28

CPC分类号： H04L1/1621 ,  H04L27/26 ,  H04L2001/0093 ,  H04L2001/0097

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。

公开(公告)号：US07801107B2

公开(公告)日：2010-09-21

申请号：US11477255

申请日：2006-06-29

申请人： Zafer Sahinoglu ,  Andreas F. Molisch ,  Philip V. Orlik

发明人： Zafer Sahinoglu ,  Andreas F. Molisch ,  Philip V. Orlik

IPC分类号： H04J3/06

CPC分类号： H04L7/041 ,  H04J13/00 ,  H04L7/06

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 are inserted in the synchronization header. Multiple fixed length ternary sequences are inserted in the start of frame delimiter in an arbitrary order, 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。 前同步码和帧定界符开始插入到同步头中。 多个固定长度的三进制序列以任意顺序插入到帧定界符的起始处，然后发送分组。

公开(公告)号：US20100097985A1

公开(公告)日：2010-04-22

申请号：US12402459

申请日：2009-03-11

申请人： Philip V. Orlik ,  Raymond Yim ,  Andreas F. Molisch ,  Zhifeng Tao

发明人： Philip V. Orlik ,  Raymond Yim ,  Andreas F. Molisch ,  Zhifeng Tao

IPC分类号： H04W40/00

CPC分类号： H04W74/002 ,  H04W74/0833

摘要： In a wireless network including a base station (BS) and a set of mobile stations (MS), a MS transmits a ranging request message to the BS, using random access, when the MS enters the cell. The ranging request message includes request MS specific information for identifying the MS. The MS receives a ranging response message broadcast from the BS, which includes response MS specific information, request and response specific information to determine whether the BS received the request, or whether a collision occurred.

摘要翻译： 在包括基站（BS）和一组移动站（MS）的无线网络中，当MS进入小区时，MS使用随机接入向BS发送测距请求消息。 测距请求消息包括用于识别MS的请求MS特定信息。 MS接收从BS广播的测距响应消息，其包括响应MS特定信息，请求和响应特定信息，以确定BS是否接收到请求，还是发生冲突。

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。