利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

48 records (took 0.027 seconds)

    RF signal processing in multi-antenna systems
    1.
    发明申请
    RF signal processing in multi-antenna systems 有权
    多天线系统中的RF信号处理

    公开(公告)号：US20050025271A1

    公开(公告)日：2005-02-03

    申请号：US10629240

    申请日：2003-07-29

    Applicant: Andreas Molisch ,  Sun Kung ,  Xinying Zhang ,  Jinyun Zhang

    Inventor： Andreas Molisch ,  Sun Kung ,  Xinying Zhang ,  Jinyun Zhang

    IPC: H04J99/00 ,  H04B7/06 ,  H04B7/08 ,  H04L1/02

    CPC classification number: H04B7/0874 ,  H04B7/0691 ,  H04B7/0805 ,  H04B7/0857

    Abstract: A method for antenna subset selection by joint processing in RF and baseband in a multi-antenna systems. Lt input data streams are generated in a transmitter for either diversity transmission or multiplexing transmission. These streams are modulated to RF signals. These signals are switched to the t branches associated with the t transmit antennas, and a phase-shift transformation is applied to the RF signals by a t×t matrix multiplication operator Φ1, whose output are t≧Lt RF signals. These signals are transmitted over a channel by t antennas. The transmitted signals are received by r antennas in a receiver. A phase-shift transformation is applied to the r RF signals by a r×r matrix multiplication operator Φ2. Lr branches of these phase shifted streams are demodulated and further processed in baseband to recover the input data streams.

    Abstract translation: 一种在多天线系统中通过RF和基带中的联合处理进行天线子集选择的方法。 在用于分集发送或复用传输的发射机中生成Lt个输入数据流。 这些流被调制成RF信号。 这些信号被切换到与t个发射天线相关联的t个分支，并且通过txt矩阵乘法运算符Phi1将相移变换应用于RF信号，该输出是t> = Lt RF信号。 这些信号通过t个天线在信道上传输。 所发送的信号由接收机中的r个天线接收。 通过rxr矩阵乘法运算符Phi2对r个RF信号进行相移变换。 这些相移流的Lr分支被解调并在基带中进一步处理以恢复输入数据流。

    RF signal processing in multi-antenna systems
    2.
    发明授权
    RF signal processing in multi-antenna systems 有权
    多天线系统中的RF信号处理

    公开(公告)号：US07382840B2

    公开(公告)日：2008-06-03

    申请号：US10629240

    申请日：2003-07-29

    Applicant: Andreas Molisch ,  Sun Yuan Kung ,  Xinying Zhang ,  Jinyun Zhang

    Inventor： Andreas Molisch ,  Sun Yuan Kung ,  Xinying Zhang ,  Jinyun Zhang

    IPC: H04B7/10

    CPC classification number: H04B7/0874 ,  H04B7/0691 ,  H04B7/0805 ,  H04B7/0857

    Abstract: A method for antenna subset selection by joint processing in RF and baseband in a multi-antenna systems. Lt input data streams are generated in a transmitter for either diversity transmission or multiplexing transmission. These streams are modulated to RF signals. These signals are switched to the t branches associated with the t transmit antennas, and a phase-shift transformation is applied to the RF signals by a t×t matrix multiplication operator Φ1, whose output are t≧Lt RF signals. These signals are transmitted over a channel by t antennas. The transmitted signals are received by r antennas in a receiver. A phase-shift transformation is applied to the r RF signals by a r×r matrix multiplication operator Φ2. Lr branches of these phase shifted streams are demodulated and further processed in baseband to recover the input data streams.

    Abstract translation: 一种在多天线系统中通过RF和基带中的联合处理进行天线子集选择的方法。 在用于分集发送或复用传输的发射机中生成输入数据流。 这些流被调制成RF信号。 这些信号被切换到与t个发送天线相关联的t个分支，并且通过txt矩阵乘法运算符Phi1 <1>将RF移位变换应用于RF信号，其输出为t> = L RF信号。 这些信号通过t个天线在信道上传输。 所发送的信号由接收机中的r个天线接收。 通过rxr矩阵乘法运算符Phi <2>将相移变换应用于r RF信号。 这些相移流的L分支分支被解调并在基带中进一步处理以恢复输入数据流。

    System and method for transmitting signals in cooperative base station multi-user MIMO networks
    3.
    发明申请
    System and method for transmitting signals in cooperative base station multi-user MIMO networks 有权
    在合作基站多用户MIMO网络中传输信号的系统和方法

    公开(公告)号：US20070248172A1

    公开(公告)日：2007-10-25

    申请号：US11408284

    申请日：2006-04-20

    Applicant: Neelesh Mehta ,  Hongyuan Zhang ,  Andreas Molisch ,  Jinyun Zhang

    Inventor： Neelesh Mehta ,  Hongyuan Zhang ,  Andreas Molisch ,  Jinyun Zhang

    IPC: H04K1/10

    CPC classification number: H04B7/024

    Abstract: 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.

    Abstract translation: 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

    Randomly inverting pulse polarity in an UWB signal for power spectrum density shaping
    4.
    发明授权
    Randomly inverting pulse polarity in an UWB signal for power spectrum density shaping 有权
    在UWB信号中随机反转脉冲极性，用于功率谱密度整形

    公开(公告)号：US07103109B2

    公开(公告)日：2006-09-05

    申请号：US10361315

    申请日：2003-02-10

    Applicant: Yves-Paul Nakache ,  Andreas Molisch ,  Jinyun Zhang

    Inventor： Yves-Paul Nakache ,  Andreas Molisch ,  Jinyun Zhang

    IPC: H04L27/04

    CPC classification number: H04L25/03866 ,  G01S13/0209 ,  H04B1/71632 ,  H04B1/7176 ,  H04B1/719 ,  H04B2001/6908

    Abstract: 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.

    Abstract translation: 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。

    Quasi-block diagonal low-density parity-check code for MIMO systems
    5.
    发明申请
    Quasi-block diagonal low-density parity-check code for MIMO systems 审中-公开
    用于MIMO系统的准块对角低密度奇偶校验码

    公开(公告)号：US20050268202A1

    公开(公告)日：2005-12-01

    申请号：US10857042

    申请日：2004-05-28

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

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

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

    CPC classification number: H04L1/005 ,  H04L1/0057 ,  H04L1/0618

    Abstract: 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.

    Abstract translation: 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。

    Adaptive transmit diversity with quadrant phase constraining feedback
    6.
    发明申请
    Adaptive transmit diversity with quadrant phase constraining feedback 有权
    具有象限相位约束反馈的自适应发射分集

    公开(公告)号：US20050048940A1

    公开(公告)日：2005-03-03

    申请号：US10648558

    申请日：2003-08-25

    Applicant: Jingxian Wu ,  Andreas Molisch ,  Jinyun Zhang

    Inventor： Jingxian Wu ,  Andreas Molisch ,  Jinyun Zhang

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

    CPC classification number: H04L1/0693 ,  H04B7/0626 ,  H04B7/0658 ,  H04B7/0669 ,  H04L1/0618

    Abstract: 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.

    Abstract translation: 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。

    Method for representing a combination of signals with a distribution of a single lognormal random variable
    7.
    发明申请
    Method for representing a combination of signals with a distribution of a single lognormal random variable 有权
    用于表示具有单个对数正态随机变量的分布的信号的组合的方法

    公开(公告)号：US20070038413A1

    公开(公告)日：2007-02-15

    申请号：US11203440

    申请日：2005-08-15

    Applicant: Neelesh Mehta ,  Andreas Molisch ,  Jingxian Wu ,  Jinyun Zhang

    Inventor： Neelesh Mehta ,  Andreas Molisch ,  Jingxian Wu ,  Jinyun Zhang

    IPC: G06F15/00

    CPC classification number: H04B17/23

    Abstract: 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.

    Abstract translation: 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。

    Estimating channel impulse response and equalizer coefficients in UWB communication systems
    10.
    发明授权
    Estimating channel impulse response and equalizer coefficients in UWB communication systems 有权
    估计UWB通信系统中的信道脉冲响应和均衡器系数

    公开(公告)号：US07356100B2

    公开(公告)日：2008-04-08

    申请号：US10616875

    申请日：2003-07-10

    Applicant: Andreas Molisch ,  Ye Li ,  Jinyun Zhang

    Inventor： Andreas Molisch ,  Ye Li ,  Jinyun Zhang

    IPC: H04L27/06 ,  H04B1/00

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

    Abstract: 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.

    Abstract translation: 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。

Patent Agency Ranking