公开(公告)号：US07292651B2

公开(公告)日：2007-11-06

申请号：US10687400

申请日：2003-10-16

申请人： Ye Li

发明人： Ye Li

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L25/0222 ,  H04L1/06 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0232 ,  H04L25/0236 ,  H04L27/2647

摘要： A method and apparatus for pilot-symbol aided channel estimation in a wireless digital communication system which transmits packets of N OFDM data blocks, each data block comprising a set of K orthogonal carrier frequencies. At the transmitter, pilot symbols are inserted into each data packet at known positions so as to occupy predetermined positions in the time-frequency space. At the receiver, the received signal is subject to a two-dimensional inverse Fourier transform, two-dimensional filtering and a two-dimensional Fourier transform to recover the pilot symbols so as to estimate the channel response.

摘要翻译： 一种用于发送N个OFDM数据块的分组的无线数字通信系统中的导频符号辅助信道估计的方法和装置，每个数据块包括一组K个正交载波频率。 在发射机处，导频符号被插入到已知位置的每个数据分组中，以便占据时间 - 频率空间中的预定位置。 在接收机处，接收到的信号进行二维逆傅里叶变换，二维滤波和二维傅里叶变换，以恢复导频符号，以估计信道响应。

公开(公告)号：US20160132560A1

公开(公告)日：2016-05-12

申请号：US14539010

申请日：2014-11-12

申请人： Leng Han ,  Yanhui Zhao ,  Xiong Li ,  Xiaoming Gao ,  Ye Li

发明人： Leng Han ,  Yanhui Zhao ,  Xiong Li ,  Xiaoming Gao ,  Ye Li

IPC分类号： G06F17/30 ,  H04L12/751

CPC分类号： G06F17/30516 ,  G06F17/30958

摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for dynamic topology generation. One of the methods includes receiving, from a user, a query that specifies a search criterion and a post-processing function prototype. A topology definition is generated from the query that specifies one or more source nodes and at least one processing node, wherein the processing node is specified in the topology to output a stream of data objects corresponding to the data object identifiers and a post-processing node according to the post-processing function prototype, wherein the post-processing node is specified in the topology to receive a stream of data objects output by the processing node, and is specified in the topology to output one or more modified data objects. The topology definition is then provided to a real-time stream computing system for execution.

摘要翻译： 方法，系统和装置，包括在计算机存储介质上编码的计算机程序，用于动态拓扑生成。 方法之一包括从用户接收指定搜索条件的查询和后处理功能原型。 从查询生成拓扑定义，其指定一个或多个源节点和至少一个处理节点，其中在拓扑中指定处理节点以输出与数据对象标识符相对应的数据对象流和后处理节点 根据后处理功能原型，其中在拓扑中指定后处理节点以接收由处理节点输出的数据对象流，并且在拓扑中指定以输出一个或多个修改的数据对象。 然后将拓扑定义提供给实时流计算系统以供执行。

公开(公告)号：US08472553B2

公开(公告)日：2013-06-25

申请号：US12550122

申请日：2009-08-28

申请人： Ye Li

发明人： Ye Li

IPC分类号： H04L27/00

CPC分类号： H04L25/024 ,  H04L1/06 ,  H04L7/0008 ,  H04L25/0206 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2601 ,  H04L27/261 ,  H04L27/2613

摘要： In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols that produce zero cross-correlation energy. Channel communication can accordingly be simplified as the zero cross-correlation property allows for channel estimation without a matrix inversion.

公开(公告)号：US07983352B2

公开(公告)日：2011-07-19

申请号：US11532490

申请日：2006-09-15

申请人： Ye Li ,  Anthony C. K. Soong ,  Jianmin Lu

发明人： Ye Li ,  Anthony C. K. Soong ,  Jianmin Lu

IPC分类号： H04L1/02

CPC分类号： H04W52/42 ,  H04B7/04 ,  H04B7/0669

摘要： A telecommunication network component, comprising: a memory configured to store instructions, and a processor configured to execute the stored instructions, the instructions comprising: determining a plurality of power allocation adjustments for signals transmitted via an antenna array that promotes decision-feedback detection without using channel state information, and outputting the power allocation adjustments to the array. Also disclosed is a power allocation method comprising: determining a power allocation scheme that promotes decision-feedback detection in a multiple-input and multiple-output system without using channel state information, and implementing the power allocation scheme on an antenna array by modifying an adjustment for each of a plurality of antennas in the array.

摘要翻译： 一种电信网络组件，包括：被配置为存储指令的存储器和被配置为执行所存储的指令的处理器，所述指令包括：确定用于经由天线阵列发送的信号的多个功率分配调整，所述天线阵列促进判决反馈检测而不使用 信道状态信息，并且将功率分配调整输出到阵列。 还公开了一种功率分配方法，包括：在不使用信道状态信息的情况下，确定促进多输入和多输出系统中的判决反馈检测的功率分配方案，以及通过修改调整来实现天线阵列上的功率分配方案 对于阵列中的多个天线中的每一个。

公开(公告)号：US07940852B2

公开(公告)日：2011-05-10

申请号：US12315300

申请日：2008-12-02

申请人： Justin C. Chuang ,  Ye Li ,  Lang Lin

发明人： Justin C. Chuang ,  Ye Li ,  Lang Lin

IPC分类号： H04L5/12 ,  H04L1/02

CPC分类号： H04L25/0204 ,  H04L27/2647

摘要： A method for decoding a received signal comprising the steps of receiving a signal at a plurality of antennas, applying Fast Fourier transformations to the received signal, estimating channel characteristics of a channel over which the signal was transmitted using iterative processing and decoding the transformed signal.

摘要翻译： 一种用于对接收信号进行解码的方法，包括以下步骤：在多个天线处接收信号，对接收到的信号应用快速傅立叶变换，使用迭代处理估计发送信号的信道的信道特性并解码变换后的信号。

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：US07355959B2

公开(公告)日：2008-04-08

申请号：US10856708

申请日：2004-05-28

申请人： Andreas F. Molisch ,  Ye Li ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Ye Li ,  Jinyun Zhang

IPC分类号： H04J11/00

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：US07305051B2

公开(公告)日：2007-12-04

申请号：US11508480

申请日：2006-08-22

申请人： Ye Li

发明人： Ye Li

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H04L25/024 ,  H04L1/06 ,  H04L7/0008 ,  H04L25/0206 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2601 ,  H04L27/261 ,  H04L27/2613

摘要： In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols that produce zero cross-correlation energy. Channel communication can accordingly be simplified as the zero cross-correlation property allows for channel estimation without a matrix inversion.

摘要翻译： 在各种实施例中，提供技术以通过使用产生零互相关能量的各种训练符号来确定诸如OFDM系统或使用多个发射天线的系统的各种通信系统的信道特性。 因此，可以简化通道通信，因为零互相关特性允许无矩阵求逆的信道估计。

公开(公告)号：US20070030919A1

公开(公告)日：2007-02-08

申请号：US11545257

申请日：2006-10-10

申请人： Ye Li

发明人： Ye Li

IPC分类号： H04B7/02 ,  H04L27/06

CPC分类号： H04L25/0228 ,  H04L25/0204 ,  H04L25/0242 ,  H04L27/261

摘要： In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols.

摘要翻译： 在各种实施例中，提供了通过使用各种训练符号组来确定诸如OFDM系统或使用多个发射天线的系统的各种通信系统的信道特性的技术。

公开(公告)号：US07099413B2

公开(公告)日：2006-08-29

申请号：US09774875

申请日：2001-02-01

申请人： Justin C. Chuang ,  Ye Li ,  Lang Lin

发明人： Justin C. Chuang ,  Ye Li ,  Lang Lin

IPC分类号： H04B7/08

CPC分类号： H04L25/0204 ,  H04L27/2647

摘要： Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative forward processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.

摘要翻译： 提出了编码正交频分复用（COFDM）系统的联合信道估计和最大似然解码方法。 使用这种方法结合卷积编码，可以在快速色散衰落通道中实现鲁棒和近似最佳的相干检测。 在具有激进频率重用的系统中实现了分组数据吞吐量的显着性能增益。 一种用于估计多载波传输系统中的信道特性的方法，包括以下步骤：接收多载波信号，对所述多载波信号应用快速傅立叶变换，使用迭代前向处理的组合估计多载波信号在其上传输的信道特性 并进行迭代反向处理，并对变换后的多载波信号进行解码。