公开(公告)号：US08040962B2

公开(公告)日：2011-10-18

申请号：US12173685

申请日：2008-07-15

申请人： Wee Peng Goh ,  Jason Beck ,  Raja Gosula

发明人： Wee Peng Goh ,  Jason Beck ,  Raja Gosula

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/0212 ,  H04L27/2647

摘要： An efficient algorithm is described for use with OFDM receivers that characterizes the impulse response of a communication channel using frequency domain techniques that reduce computational and memory requirements, relative to time-domain cross-correlation methods, without sacrificing algorithm performance. An FFT engine is used to transform a time domain input sequence, the transformed sequence is multiplied by the conjugate of the expected sequence, the product of several sequences is averaged, then the FFT engine transforms the average back to a time domain sequence, the magnitude of which is the impulse response of the channel.

摘要翻译： 描述了一种有效的算法，用于使用频域技术来表征通信信道的脉冲响应的OFDM接收机，其相对于时域互相关方法，相对于时域互相关方法降低计算和存储器需求，而不牺牲算法性能。 FFT引擎用于对时域输入序列进行变换，将变换后的序列与预期序列的共轭相乘，将几个序列的乘积进行平均，然后FFT引擎将平均值转换为时域序列， 其中是频道的脉冲响应。

公开(公告)号：US20090022252A1

公开(公告)日：2009-01-22

申请号：US12173685

申请日：2008-07-15

申请人： Wee Peng Goh ,  Jason Beck ,  Raja Gosula

发明人： Wee Peng Goh ,  Jason Beck ,  Raja Gosula

IPC分类号： H04L27/06

CPC分类号： H04L25/0212 ,  H04L27/2647

摘要： An efficient algorithm is described for use with OFDM receivers that characterizes the impulse response of a communication channel using frequency domain techniques that reduce computational and memory requirements, relative to time-domain cross-correlation methods, without sacrificing algorithm performance. An FFT engine is used to transform a time domain input sequence, the transformed sequence is multiplied by the conjugate of the expected sequence, the product of several sequences is averaged, then the FFT engine transforms the average back to a time domain sequence, the magnitude of which is the impulse response of the channel.

摘要翻译： 描述了一种有效的算法，用于使用频域技术来表征通信信道的脉冲响应的OFDM接收机，其相对于时域互相关方法，相对于时域互相关方法降低计算和存储器需求，而不牺牲算法性能。 FFT引擎用于对时域输入序列进行变换，将变换后的序列与预期序列的共轭相乘，将几个序列的乘积进行平均，然后FFT引擎将平均值转换为时域序列， 其中是频道的脉冲响应。

公开(公告)号：US08432999B2

公开(公告)日：2013-04-30

申请号：US13274794

申请日：2011-10-17

申请人： Wee Peng Goh ,  Jason Beck ,  Raja Gosula

发明人： Wee Peng Goh ,  Jason Beck ,  Raja Gosula

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L25/0212 ,  H04L27/2647

摘要： An efficient algorithm is described for use with OFDM receivers that characterizes the impulse response of a communication channel using frequency domain techniques that reduce computational and memory requirements, relative to time-domain cross-correlation methods, without sacrificing algorithm performance. An FFT engine is used to transform a time domain input sequence, the transformed sequence is multiplied by the conjugate of the expected sequence, the product of several sequences is averaged, then the FFT engine transforms the average back to a time domain sequence, the magnitude of which is the impulse response of the channel.

摘要翻译： 描述了一种有效的算法，用于使用频域技术来表征通信信道的脉冲响应的OFDM接收机，其相对于时域互相关方法，相对于时域互相关方法降低计算和存储器需求，而不牺牲算法性能。 FFT引擎用于对时域输入序列进行变换，将变换后的序列与预期序列的共轭相乘，将几个序列的乘积进行平均，然后FFT引擎将平均值转换为时域序列， 其中是频道的脉冲响应。

公开(公告)号：US20090264142A1

公开(公告)日：2009-10-22

申请号：US12327732

申请日：2008-12-03

申请人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

发明人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

IPC分类号： H04B7/00 ,  H04W72/00 ,  H04L27/28

CPC分类号： H04L5/0032 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0057 ,  H04L5/0062 ,  H04L5/0066 ,  H04L25/0204 ,  H04W72/0406 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/082

摘要： Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference.

摘要翻译： 描述了用于减轻跨越多个相邻覆盖区域的基本上相同的工作频带的无线通信系统中的小区间干扰的方法和装置。 操作频带可以在多个相邻或相邻的小区之间共享，例如在频率重用一个配置中。 无线通信系统可以跨多个基站同步一个或多个资源分配区域或区域，并且可以协调每个资源分配区域内的置换类型。 基站可以协调多个协调资源分配区域中的每一个中的导频配置。 可以基于干扰级别在协调的资源分配区域中为用户站分配资源。 订户站可以确定协调资源分配区域中的多个基站中的每个基站的信道估计以减轻干扰。

公开(公告)号：US5870388A

公开(公告)日：1999-02-09

申请号：US685691

申请日：1996-07-24

申请人： Weng Ho Yung ,  Kin Mun Lye ,  Teck Chien Pek ,  Wee Peng Goh

发明人： Weng Ho Yung ,  Kin Mun Lye ,  Teck Chien Pek ,  Wee Peng Goh

IPC分类号： H04L12/28 ,  H04L12/413 ,  H04Q7/20

CPC分类号： H04W74/085 ,  H04L12/413

摘要： A radio conferencing method and apparatus for transmitting packets of data from a plurality of radios over a transmission channel within a series of frames of predetermined duration, each packet of data having a predetermined time length, which method comprises the steps of: sensing the status of the channel; if the channel is idle, then transmitting the packet of data; if the channel is busy with another packet of data being sent, then disposing the packet of data and re-scheduling the transmission of the next packet of data to a time equal to a fraction of the time length of the packet of data plus the duration of the frame; and repeating the above steps.

摘要翻译： 一种用于在预定持续时间的一系列帧内的传输信道上从多个无线电发送数据分组的无线电会议方法和装置，每个数据分组具有预定的时间长度，所述方法包括以下步骤： 这个频道; 如果信道空闲，则发送数据包; 如果信道正忙于发送的另一数据包，则将数据包放置并重新调度下一个数据包的传输等于数据包的时间长度的一部分加上持续时间 的框架 并重复上述步骤。

公开(公告)号：US07995459B2

公开(公告)日：2011-08-09

申请号：US12473656

申请日：2009-05-28

申请人： Wee Peng Goh ,  Anton Monk ,  Ron Porat

发明人： Wee Peng Goh ,  Anton Monk ,  Ron Porat

IPC分类号： H04J11/00

CPC分类号： H04B17/364 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/2613 ,  H04L41/12 ,  H04W24/00

摘要： In an orthogonal frequency division multiplex (OFDM) communication network, a node transmits an echo profile probe to other nodes in the network. The echo profile probe is a message that allows characterization of the unique echo profile through the communication channel between each node pair. The echo profile is used to calculate the cyclic prefix length needed for optimum communication from one node to the other.

摘要翻译： 在正交频分复用（OFDM）通信网络中，节点将回波分布探测发送到网络中的其他节点。 回波分布探测器是允许通过每个节点对之间的通信信道表征唯一回波分布的消息。 回波分布用于计算从一个节点到另一个节点进行最佳通信所需的循环前缀长度。

公开(公告)号：US09059828B1

公开(公告)日：2015-06-16

申请号：US13897447

申请日：2013-05-20

申请人： Jose Marcelo Lima Duarte ,  Shue Lee Chang ,  Wee Peng Goh

发明人： Jose Marcelo Lima Duarte ,  Shue Lee Chang ,  Wee Peng Goh

IPC分类号： H04L27/06 ,  H04L1/00

CPC分类号： H04L1/0054 ,  H04L1/06 ,  H04L25/03242 ,  H04L25/03318 ,  H04L25/03891 ,  H04L2025/03598

摘要： This invention discloses an optimum form maximum likelihood MIMO detector (SFS ML Detector) that computes the LLR of the most likely received bit sequence from the received signal y, which consist of multiple signal stream from a MIMO channel H and an estimate of H. Through 5 simple steps of QR factorization, computation of partial Euclidean distance, sorting of the partial Euclidean distance, selection of surviving hypothesis by a set of algorithmic rule and computation of the full Euclidean distance of the survivors, and computation of the maximum likelihood from the surviving full Euclidean distance, the LLR of the received bit sequence can be obtained with a significantly lower number of computation and comparison than that is implied in the theoretical form of the maximum likelihood (ML) detector. There is no loss in performance of the SFS ML detector from the theoretical ML detector.

摘要翻译： 本发明公开了一种最佳形式最大似然MIMO检测器（SFS ML检测器），其从接收信号y计算最可能接收的比特序列的LLR，其由来自MIMO信道H的多个信号流和H的估计组成。通过 QR分解的5个简单步骤，部分欧几里德距离的计算，部分欧几里德距离的排序，通过一组算法规则选择存活假设和计算幸存者的完整欧几里德距离，以及计算幸存者的最大似然 完全欧几里德距离，可以以比最大似然（ML）检测器的理论形式暗示的计算和比较数明显减少得到接收到的位序列的LLR。 来自理论ML检测器的SFS ML检测器的性能没有损失。

公开(公告)号：US08626072B2

公开(公告)日：2014-01-07

申请号：US13472040

申请日：2012-05-15

申请人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

发明人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

IPC分类号： H04B1/00

CPC分类号： H04L5/0032 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0057 ,  H04L5/0062 ,  H04L5/0066 ,  H04L25/0204 ,  H04W72/0406 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/082

摘要： Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference.

摘要翻译： 描述了用于减轻跨越多个相邻覆盖区域的基本上相同的工作频带的无线通信系统中的小区间干扰的方法和装置。 操作频带可以在多个相邻或相邻的小区之间共享，例如在频率重用一个配置中。 无线通信系统可以跨多个基站同步一个或多个资源分配区域或区域，并且可以协调每个资源分配区域内的置换类型。 基站可以协调多个协调资源分配区域中的每一个中的导频配置。 可以基于干扰级别在协调的资源分配区域中为用户站分配资源。 订户站可以确定协调资源分配区域中的多个基站中的每个基站的信道估计以减轻干扰。

公开(公告)号：US08588055B2

公开(公告)日：2013-11-19

申请号：US13032580

申请日：2011-02-22

申请人： Wee Peng Goh ,  Anton Monk ,  Ron Porat

发明人： Wee Peng Goh ,  Anton Monk ,  Ron Porat

IPC分类号： H04J11/00

CPC分类号： H04B17/364 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/2613 ,  H04L41/12 ,  H04W24/00

摘要： In an orthogonal frequency division multiplex (OFDM) communication network, a node transmits an echo profile probe to other nodes in the network. The echo profile probe is a message that allows characterization of the unique echo profile through the communication channel between each node pair. The echo profile is used to calculate the cyclic prefix length needed for optimum communication from one node to the other.

公开(公告)号：US09608703B2

公开(公告)日：2017-03-28

申请号：US12397300

申请日：2009-03-03

申请人： Ron Porat ,  Wee Peng Goh ,  Yair Bourlas

发明人： Ron Porat ,  Wee Peng Goh ,  Yair Bourlas

IPC分类号： H04B7/04 ,  H04B7/02

CPC分类号： H04B7/0417 ,  H04B7/024

摘要： The subject matter disclosed herein provides methods and apparatus for closed loop operation of a wireless system implementing multiple input multiple output (MIMO). In one aspect, there is provided a method. The method may include receiving a payload including channel estimation information. Moreover, one or more bits of the payload may be inserted into a subset of the tiles of a slot. The slot including the subset of the tiles carrying the one or more bits of the payload may be provided as part of a closed loop MIMO-based system. Related systems, apparatus, methods, and/or articles are also described.