公开(公告)号：US20070038413A1

公开(公告)日：2007-02-15

申请号：US11203440

申请日：2005-08-15

申请人： Neelesh Mehta ,  Andreas Molisch ,  Jingxian Wu ,  Jinyun Zhang

发明人： Neelesh Mehta ,  Andreas Molisch ,  Jingxian Wu ,  Jinyun Zhang

IPC分类号： G06F15/00

CPC分类号： H04B17/23

摘要： A method analyzes a set of signal acquired from a physical system. A set of parameters characterizing the set of signals is measured. The parameters can include the mean and the variance of the power of the signal, and a Rician factor. A first point and a second point of a moment generating function for a combination of the set of signals are evaluated according to the set of parameters to obtain a first sample and a second sample, respectively. First and second equations are defined. The equations respectively have an approximation of a moment generation function of a lognormal random variable representing the combination of the set of signals, at the first point and the second point, on the left side, and the first and second sample on the right side. The two equations are solved to obtain a mean and a variance of the lognormal random variable representing a distribution of the combination of the set of the signals.

摘要翻译： 一种方法分析从物理系统获得的一组信号。 测量表征该组信号的一组参数。 参数可以包括信号功率的平均值和方差，以及Rician因子。 根据参数集来评估用于组合信号的力矩产生函数的第一点和第二点，以分别获得第一样本和第二样本。 定义第一和第二方程。 方程式分别具有表示在左侧的第一点和第二点以及右侧的第一和第二样本的组合信号的组合的对数正态随机变量的力矩产生函数的近似。 求解两个等式以获得表示该组信号的组合的分布的对数正态随机变量的平均值和方差。

公开(公告)号：US20070248172A1

公开(公告)日：2007-10-25

申请号：US11408284

申请日：2006-04-20

申请人： Neelesh Mehta ,  Hongyuan Zhang ,  Andreas Molisch ,  Jinyun Zhang

发明人： Neelesh Mehta ,  Hongyuan Zhang ,  Andreas Molisch ,  Jinyun Zhang

IPC分类号： H04K1/10

CPC分类号： H04B7/024

摘要： A method transmits and receives signals in a cooperative, multi-user, multi-input, multi-output network. The network includes base stations (BSs) and mobile stations (MSs). Each BS has at least two antennas, and each MS has at least one antenna. At a first base station and a second base station using linear pre-coding matrices, a plurality of data streams are jointly pre-coded to produce first signals and second signals. The first signals are transmitted synchronously from the first BS and the second BS to a first MS, and the second signals are transmitted synchronously from the first BS and the second BS to a second MS, and in the first signal and the second signal are asynchronous with respect each other.

摘要翻译： 一种方法是在合作，多用户，多输入，多输出网络中发送和接收信号。 网络包括基站（BS）和移动站（MS）。 每个BS具有至少两个天线，并且每个MS具有至少一个天线。 在使用线性预编码矩阵的第一基站和第二基站处，多个数据流被联合预编码以产生第一信号和第二信号。 第一信号从第一BS和第二BS同步发送到第一MS，并且第二信号从第一BS和第二BS同步发送到第二MS，并且在第一信号和第二信号是异步的 相互尊重

公开(公告)号：US20060018402A1

公开(公告)日：2006-01-26

申请号：US10895167

申请日：2004-07-20

申请人： Neelesh Mehta ,  Fadel Digham ,  Andreas Molisch ,  Jinyun Zhang

发明人： Neelesh Mehta ,  Fadel Digham ,  Andreas Molisch ,  Jinyun Zhang

IPC分类号： H04L27/04

CPC分类号： H04B7/0417 ,  H04B7/0443 ,  H04B7/0615 ,  H04B7/0626 ,  H04L1/0687 ,  H04W52/42

摘要： A method generates signals in a transmitter of a multiple-input, multiple-output wireless communications system. The transmitter includes Nt transmit antennas. A transmit covariance matrix Rt determined using statistical state information of a channel. The transmit covariance Rt matrix is decomposed using transmit eigenvalues Λt to obtain a transmit eigenspace Ut according to Rt=UtΛtU†t, where † is a Hermitian transpose. A pilot eigenspace Up is set equal to the transmit eigenspace Ut. A Nt×Tp block of pilot symbols Xp is generated from the pilot eigenspace Up and pilot eigenvalue Λp according to Xp=UpΛp1/2. A data eigenspace Ud is set equal to the transmit eigenspace Ut. In addition, a Nt×Nt data covariance matrix Qd is generated according to UdΛdU†d, where Λd are data eigenvalues. A Nt×Td block of data symbols is generated, such that an average covariance of each of the columns in the block of data symbols Xd equals the data covariance matrix Qd. The block of pilot and data symbols form the signals to be transmitted.

摘要翻译： 一种方法在多输入多输出无线通信系统的发射机中产生信号。 发射机包括N T个发射天线。 使用信道的统计状态信息确定发送协方差矩阵R t t。 使用发射特征值λλt来分解发射协方差矩阵，以获得根据R t的t 1的发送本征空间U T t， 其中†是Hermitian转置。其中†是Hermitian转置。 飞行员本征空间U P p被设置为等于发射本征空间U T t。 从导频符号空间U P1和导频特征值Lambda生成导频符号X P p P块的导频符号X P＆lt; P＆lt;＆lt; 根据X＆lt; p＆lt; p＆lt; p＆lt; p＆lt; p＆lt; p＆gt;＆lt; 1/2＆gt; 数据本征空间U D D被设置为等于发送本征空间U T t。 另外，根据U SUB ambda is is is is is is is is is is is is is is is is is SUB is according according according according according according according according according according according according according according according according according according according according according according according according according 其中λλd是数据特征值。 生成数据符号块，使得数据符号块X中的每个列的平均协方差为 等于数据协方差矩阵Q 。 导频块和数据符号块形成要传输的信号。

公开(公告)号：US20070217432A1

公开(公告)日：2007-09-20

申请号：US11377711

申请日：2006-03-16

申请人： Andreas Molisch ,  Neelesh Mehta ,  Jonathan Yedidia ,  Jinyun Zhang

发明人： Andreas Molisch ,  Neelesh Mehta ,  Jonathan Yedidia ,  Jinyun Zhang

IPC分类号： H04L12/56

CPC分类号： H04B7/026 ,  H04B7/15592 ,  H04L1/06 ,  H04L1/0618 ,  H04L2001/0097 ,  H04W52/46

摘要： A system and method for communicating information in a wireless cooperative relay network of nodes, the nodes including a source, a set of relays, and a destination. The source broadcasts a code word encoded as a data stream using a rateless code. The relays receive the data stream, decode the data stream to recover the code word, and reencode and transmit the recovered code word as the data stream with the rateless code. The destination receives and decodes the reencoded data streams to recover the code word.

摘要翻译： 一种用于在节点的无线协作中继网络中传送信息的系统和方法，所述节点包括源，一组中继和目的地。 源使用无码代码广播编码为数据流的码字。 继电器接收数据流，解码数据流以恢复代码字，并重新编码并发送恢复的代码字作为数据流与无码代码。 目的地接收并解码重新编码的数据流以恢复码字。

公开(公告)号：US20070165581A1

公开(公告)日：2007-07-19

申请号：US11333665

申请日：2006-01-17

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

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

IPC分类号： H04Q7/24

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：US20050287962A1

公开(公告)日：2005-12-29

申请号：US10877686

申请日：2004-06-25

申请人： Neelesh Mehta ,  Pallav Sudarshan ,  Andreas Molisch ,  Jinyun Zhang

发明人： Neelesh Mehta ,  Pallav Sudarshan ,  Andreas Molisch ,  Jinyun Zhang

IPC分类号： H04J99/00 ,  H01Q3/26 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04B7/02

CPC分类号： H04B7/0417 ,  H01Q3/26 ,  H04B7/0626 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/0848 ,  H04B7/0874 ,  H04L1/0036 ,  H04L1/0625 ,  H04L1/0631

摘要： A method is presented for processing signals of a multiple-input, multiple-output communications system in the RF domain. The system includes multiple transmit antennas and multiple receive antennas connected by a wireless channel. A matrix M is generated based on long-term characteristics of the wireless channel. The matrix M is multiplied times input RF signals to obtain output RF signals. The matrix can be generated in a transmitter, a receiver, or both.

摘要翻译： 提出了一种用于处理RF域中的多输入多输出通信系统的信号的方法。 该系统包括通过无线信道连接的多个发射天线和多个接收天线。 基于无线信道的长期特性生成矩阵M. 矩阵M乘以输入RF信号，以获得输出RF信号。 矩阵可以在发射机，接收机或两者中生成。

公开(公告)号：US20050048933A1

公开(公告)日：2005-03-03

申请号：US10720596

申请日：2003-11-24

申请人： Jingxian Wu ,  Jinyun Zhang ,  Andreas Molisch

发明人： Jingxian Wu ,  Jinyun Zhang ,  Andreas Molisch

IPC分类号： H04B7/06 ,  H04L1/06 ,  H04B7/02

CPC分类号： H04B7/0626 ,  H04B7/0658 ,  H04B7/0669 ,  H04L1/0618 ,  H04L1/0693

摘要： A wireless communication system includes a transmitter and a receiver. The transmitter includes multiple groups of transmit antennas. Input symbols are generated and then orthogonal space-time block is encoded to produce a data stream for each group of transmit antennas. Each data stream is adaptively linear space encoded to produce an encoded signal for each transmit antenna of each group according to feedback information for the group. The receiver includes a single receive antenna, a module for measuring a phase of a channel impulse response for each transmit antenna. The feedback information is determined independently for each group of transmit antennas from the channel impulse responses. The feedback information for each group of transmit antennas is sent to the transmitter.

摘要翻译： 无线通信系统包括发射机和接收机。 发射机包括多组发射天线。 生成输入符号，然后对正交空时块进行编码，以产生每组发射天线的数据流。 每个数据流被自适应地线性空间编码，以根据组的反馈信息为每个组的每个发射天线产生编码信号。 接收机包括单个接收天线，用于测量每个发射天线的信道脉冲响应的相位的模块。 对于每组发射天线，信道脉冲响应独立地确定反馈信息。 每组发射天线的反馈信息被发送到发射机。

公开(公告)号：US20050048940A1

公开(公告)日：2005-03-03

申请号：US10648558

申请日：2003-08-25

申请人： Jingxian Wu ,  Andreas Molisch ,  Jinyun Zhang

发明人： Jingxian Wu ,  Andreas Molisch ,  Jinyun Zhang

IPC分类号： H04B7/06 ,  H04L1/06 ,  H04B7/02

CPC分类号： H04L1/0693 ,  H04B7/0626 ,  H04B7/0658 ,  H04B7/0669 ,  H04L1/0618

摘要： A method increases transmit diversity gain in a wireless communication system. In the wireless network, a transmitter has multiple antennas and a receiver has one antenna. A phase of each of received signal is measured. One signal is selected as a reference signal. For each other signal, a phase, with respect to the phase of the reference signal, is measured independently to determine feedback information indicating a required rotation of each other signal so that a phase of each other rotated signal is within an identical quadrant as the phase of the reference signal. The feedback information for each other signal is sent to the transmitter. In the transmitter, each other signal is phase rotated according to the corresponding feedback information before the signal is transmitting to the receiver.

摘要翻译： 一种方法增加了无线通信系统中的发射分集增益。 在无线网络中，发射机具有多个天线，接收机具有一个天线。 测量每个接收信号的相位。 选择一个信号作为参考信号。 对于每个其他信号，相对于参考信号的相位的相位被独立地测量以确定指示每个其他信号的所需旋转的反馈信息，使得彼此旋转的信号的相位在与相位相同的象限内 的参考信号。 每个其他信号的反馈信息被发送到发射机。 在发射机中，在信号发送到接收机之前，根据对应的反馈信息，每个其他信号相位旋转。

公开(公告)号：US07103326B2

公开(公告)日：2006-09-05

申请号：US10648558

申请日：2003-08-25

申请人： Jingxian Wu ,  Andreas Molisch ,  Jinyun Zhang

发明人： Jingxian Wu ,  Andreas Molisch ,  Jinyun Zhang

IPC分类号： H03C7/02 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04L1/0693 ,  H04B7/0626 ,  H04B7/0658 ,  H04B7/0669 ,  H04L1/0618

摘要： A method increases transmit diversity gain in a wireless communication system. In the wireless network, a transmitter has multiple antennas and a receiver has one antenna. A phase of each of received signal is measured. One signal is selected as a reference signal. For each other signal, a phase, with respect to the phase of the reference signal, is measured independently to determine feedback information indicating a required rotation of each other signal so that a phase of each other rotated signal is within an identical quadrant as the phase of the reference signal. The feedback information for each other signal is sent to the transmitter. In the transmitter, each other signal is phase rotated according to the corresponding feedback information before the signal is transmitting to the receiver.

摘要翻译： 一种方法增加了无线通信系统中的发射分集增益。 在无线网络中，发射机具有多个天线，接收机具有一个天线。 测量每个接收信号的相位。 选择一个信号作为参考信号。 对于每个其他信号，相对于参考信号的相位的相位被独立地测量以确定指示每个其他信号的所需旋转的反馈信息，使得彼此旋转的信号的相位在与相位相同的象限内 的参考信号。 每个其他信号的反馈信息被发送到发射机。 在发射机中，在信号发送到接收机之前，根据对应的反馈信息，每个其他信号相位旋转。

公开(公告)号：US07280942B2

公开(公告)日：2007-10-09

申请号：US11203440

申请日：2005-08-15

申请人： Neelesh B. Mehta ,  Andreas F. Molisch ,  Jingxian Wu ,  Jinyun Zhang

发明人： Neelesh B. Mehta ,  Andreas F. Molisch ,  Jingxian Wu ,  Jinyun Zhang

IPC分类号： G06F15/00

CPC分类号： H04B17/23

摘要： A method analyzes a set of signal acquired from a physical system. A set of parameters characterizing the set of signals is measured. The parameters can include the mean and the variance of the power of the signal, and a Rician factor. A first point and a second point of a moment generating function for a combination of the set of signals are evaluated according to the set of parameters to obtain a first sample and a second sample, respectively. First and second equations are defined. The equations respectively have an approximation of a moment generation function of a lognormal random variable representing the combination of the set of signals, at the first point and the second point, on the left side, and the first and second sample on the right side. The two equations are solved to obtain a mean and a variance of the lognormal random variable representing a distribution of the combination of the set of the signals.