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：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：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：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：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：US20060067382A1

公开(公告)日：2006-03-30

申请号：US10950772

申请日：2004-09-27

申请人： Jonathan Yedidia ,  Andreas Molisch ,  Karunakar Pedagani

发明人： Jonathan Yedidia ,  Andreas Molisch ,  Karunakar Pedagani

IPC分类号： H04B1/707

CPC分类号： H04L5/0026 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2035 ,  H04L27/206

摘要： A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple sub-blocks of complex numbers. Each sub-block is multiplied by a disambiguating spreading transform to obtain a sub-block of transformed symbols, which can be modulated and transmitted to a receiver, where each received block is demodulated to a block of complex numbers, which are partitioned into sub-blocks. The sub-block of complex numbers are converted to a set of likelihood ratios that correspond to decoded codewords. The input bits can be decoded unambiguously even if only one of the blocks of symbols corresponding to the block of input bits is received correctly.

摘要翻译： 一种方法编码将通过无线信道发送的输入比特块序列。 每个输入比特块被转换成码字，并将每个码字映射到复数的多个子块。 将每个子块乘以去歧义扩展变换，以获得可以被调制并发送到接收机的变换符号的子块，其中每个接收块被解调成一个复数块， 块。 复数子块被转换成对应于解码码字的似然比集合。 即使只有一个对应于输入比特块的符号块中的一个被正确地接收，输入比特可被明确地解码。

公开(公告)号：US07103109B2

公开(公告)日：2006-09-05

申请号：US10361315

申请日：2003-02-10

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

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

IPC分类号： H04L27/04

CPC分类号： H04L25/03866 ,  G01S13/0209 ,  H04B1/71632 ,  H04B1/7176 ,  H04B1/719 ,  H04B2001/6908

摘要： A method eliminates spectral lines in a time hopping ultra wide bandwidth signal. First, a train of pulses is generated from input symbols. The pulses are then modulated in time according to symbols. The modulation can use pulse position modulation and time hopping. A polarity of the pulses is inverted randomly before transmitting the pulses as an ultra wide bandwidth signal. By randomly inverting the polarity of the pulses spectral lines in the ultra wide bandwidth signal are eliminated.

摘要翻译： 一种方法消除了跳时超宽带宽信号中的频谱线。 首先，从输入符号生成一串脉冲。 然后根据符号在时间上调制脉冲。 调制可以使用脉冲位置调制和跳时。 在作为超宽带宽信号发送脉冲之前，脉冲的极性被随机反转。 通过随机反转脉冲的极性，超宽带宽信号中的谱线消除。

公开(公告)号：US20050268202A1

公开(公告)日：2005-12-01

申请号：US10857042

申请日：2004-05-28

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

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

IPC分类号： H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  G11C29/00

CPC分类号： H04L1/005 ,  H04L1/0057 ,  H04L1/0618

摘要： A method codes multiple data streams in multiple-input, multiple-output communications systems. In a transmitter, an input bitstream is encoded as codewords b in multiple layers. Each layer is modulated. A quasi-block diagonal, low-density parity-check code is applied to each layer, the quasi-block diagonal, parity-check code being a matrix H, the matrix H including one row of blocks for each subcode, and one row of blocks for each layer such that Hb=0 for any valid codeword. The layers are then forwarded to transmit antennas as a transmitted signal x.

摘要翻译： 一种方法在多输入多输出通信系统中对多个数据流进行编码。 在发射机中，输入比特流被编码为多层的码字b。 每层调制。 准块对角线，低密度奇偶校验码被应用于每个层，准块对角线，奇偶校验码是矩阵H，矩阵H包括每个子码的一行块，以及一行 每个层的块，使得对于任何有效的码字，Hb = 0。 然后将层转发到发射天线作为发射信号x。

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。