公开(公告)号：US20060056533A1

公开(公告)日：2006-03-16

申请号：US10939284

申请日：2004-09-10

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

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

IPC分类号： H04L1/02

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：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：US20060002414A1

公开(公告)日：2006-01-05

申请号：US10872578

申请日：2004-06-21

申请人： Jianxuan Du ,  Andreas Molisch ,  Jinyun Zhang

发明人： Jianxuan Du ,  Andreas Molisch ,  Jinyun Zhang

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L1/0002 ,  H04L1/0019 ,  H04L1/0656

摘要： A method allocates data rates to layers to be transmitted in a multiple input, multiple output communications system. An input data stream is demultiplexed into multiple layers. For each layer, determine statistics representing a capacity of the layer based on past observations of transmitting the layer through a channel. For each layer, determine an optimum data rate based on the statistics. For each layer, determine if the optimum data rate is less than a minimum data rate of a set of available bit rates, and, if true, selecting, for a particular layer, the minimum data rate from the set of available data rates, and otherwise, if false, selecting, for the particular layer, a closest data rate from the set of available data rates that is less than the optimum data rate.

摘要翻译： 一种方法将数据速率分配给要在多输入多输出通信系统中发送的层。 输入数据流被解复用为多层。 对于每个层，基于通过信道传输层的过去观察来确定表示层的容量的统计信息。 对于每一层，根据统计数据确定最佳数据速率。 对于每个层，确定最佳数据速率是否小于一组可用比特率的最小数据速率，并且如果为真，则从一组可用数据速率为特定层选择最小数据速率，以及 否则，如果为false，则对于特定层，从小于最佳数据速率的可用数据速率集合中选择最接近的数据速率。

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：US07356100B2

公开(公告)日：2008-04-08

申请号：US10616875

申请日：2003-07-10

申请人： Andreas Molisch ,  Ye Li ,  Jinyun Zhang

发明人： Andreas Molisch ,  Ye Li ,  Jinyun Zhang

IPC分类号： H04L27/06 ,  H04B1/00

CPC分类号： H04B1/71637 ,  H04B1/709 ,  H04B1/719 ,  H04L1/203 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/03012 ,  H04L2025/03484

摘要： A method estimates a channel impulse response in an ultra wide bandwidth (UWB) system. Multiple training sequences modulated at a chip rate are received. Each training sequence is sampled by parallel with multiple correlators at sampling rate substantially slower than the chip rate to obtain a samples over a time interval of the impulse response at a resolution substantially equal to the chip rate, and then estimating the channel impulse response from these samples.

摘要翻译： 一种方法估计超宽带（UWB）系统中的信道脉冲响应。 接收以码片速率调制的多个训练序列。 每个训练序列以与码片速率相比更慢的采样速率与多个相关器并联采样，以在基本上等于码片速率的分辨率下在脉冲响应的时间间隔上获得采样，然后从这些估计信道脉冲响应 样品。

公开(公告)号：US20050265218A1

公开(公告)日：2005-12-01

申请号：US10856708

申请日：2004-05-28

申请人： Andreas Molisch ,  Ye Li ,  Jinyun Zhang

发明人： Andreas Molisch ,  Ye Li ,  Jinyun Zhang

IPC分类号： H04J11/00 ,  H04B1/69 ,  H04B1/713 ,  H04B7/08 ,  H04B7/26 ,  H04J13/00 ,  H04L25/02 ,  H04L27/26

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：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：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：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：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。