利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

77 条记录 (耗时 0.028 秒)

    MU-MIMO-OFDMA multi-rank CQI and precoder signaling schemes
    2.
    发明授权
    MU-MIMO-OFDMA multi-rank CQI and precoder signaling schemes 有权
    MU-MIMO-OFDMA多级CQI和预编码器信令方案

    公开(公告)号：US08705392B2

    公开(公告)日：2014-04-22

    申请号：US13080416

    申请日：2011-04-05

    申请人： Narayan Prasad ,  Guosen Yue ,  Mohammad A. Khojastepour ,  Meilong Jiang ,  Sampath Rangarajan

    发明人： Narayan Prasad ,  Guosen Yue ,  Mohammad A. Khojastepour ,  Meilong Jiang ,  Sampath Rangarajan

    IPC分类号： H04L12/26 ,  H04W4/00 ,  H04B7/02

    CPC分类号： H04W24/08 ,  H04B7/0452 ,  H04B7/0465 ,  H04B7/0486 ,  H04W52/346 ,  H04W72/0406 ,  H04W72/085

    摘要： Methods and systems for determining attributes of communication channels of MU-MIMO users in an (OFDMA) system are disclosed. One method includes receiving from a base station, for at least one sub-band of contiguous sub-carriers, an indication of an estimate of or an upper-bound on a total number of streams that are co-scheduled by the base station on the at least one sub-band. The method further includes determining one or more signal quality measures for the at least one sub-band based on the estimate of or the upper-bound on the total number of streams that are scheduled by the base station on the at least one sub-band in accordance with at least one of single-user scheduling rules or multi-user scheduling rules. In addition, the method includes transmitting to the base station an indication of the one or more signal quality measures and at least one tag identifying each signal quality measure as being determined in accordance with the single-user scheduling rules or the multi-user scheduling rules.

    摘要翻译： 公开了一种用于确定（OFDMA）系统中MU-MIMO用户的通信信道属性的方法和系统。 一种方法包括从基站接收对于连续子载波的至少一个子带，对由基站在...上共同调度的流的总数的估计或上限的指示 至少一个子带。 所述方法还包括基于由所述基站在所述至少一个子带上调度的流的总数的估计或所述上限来确定所述至少一个子带的一个或多个信号质量度量 根据单用户调度规则或多用户调度规则中的至少一个。 此外，该方法包括向基站发送一个或多个信号质量测量的指示，以及标识每个信号质量测量的至少一个标签，根据单用户调度规则或多用户调度规则确定 。

    Efficient channel search with energy detection
    3.
    发明授权
    Efficient channel search with energy detection 有权
    有效的频道搜索与能量检测

    公开(公告)号：US08611293B2

    公开(公告)日：2013-12-17

    申请号：US13029726

    申请日：2011-02-17

    申请人： Yan Xin ,  Guosen Yue

    发明人： Yan Xin ,  Guosen Yue

    IPC分类号： H04W4/00

    CPC分类号： H04W72/02 ,  H04W24/00 ,  H04W28/18 ,  Y02D70/00

    摘要： Methods and systems for cognitive radio channel searching are shown that include determining an energy detection threshold and a number of samples that will find a free channel in a minimum searching time, based on a number of channels K and a channel occupancy probability π0, constrained by a target acceptable misdetection probability and a target acceptable false alarm probability. The search includes an energy detection threshold and a number of samples that will find a free channel in a minimum average searching time. The K channels are searched with a signaling device using the determined energy detection threshold and the determined number of samples to find a free channel.

    摘要翻译： 示出了用于认知无线电信道搜索的方法和系统，其包括基于信道数目K和信道占用概率pi0来确定在最小搜索时间内将找到空闲信道的能量检测阈值和数量的样本数， 目标可接受的误检概率和目标可接受的误报概率。 搜索包括能量检测阈值和将在最小平均搜索时间内找到空闲频道的样本数。 使用确定的能量检测阈值和所确定的样本数量来搜索K个信道，使用信令装置来搜索自由信道。

    System and method for wireless transmission using hybrid ARQ based on average mutual information per bit
    5.
    发明授权
    System and method for wireless transmission using hybrid ARQ based on average mutual information per bit 有权
    基于每位平均互信息的混合ARQ进行无线传输的系统和方法

    公开(公告)号：US08341467B2

    公开(公告)日：2012-12-25

    申请号：US12498042

    申请日：2009-07-06

    申请人： Guosen Yue ,  Xiaodong Wang

    发明人： Guosen Yue ,  Xiaodong Wang

    IPC分类号： G06F11/00

    CPC分类号： H04L1/1825 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009

    摘要： A method and system for packet transmission in a hybrid automatic repeat request (ARQ) system. A modulation and a block length for a transmission are determined based on the average mutual information per bit. The average mutual information per bit is computed based on a current channel signal-to-noise ratio and a plurality of previous transmissions, each being transmitted with a respective coded block length, modulation form, and signal-to-noise ratio. A block error rate is computed for the potential block lengths and modulations based on the average mutual information per bit, and a throughput of the current transmission is determined based on the block error rate. The modulation form and the block length of the transmission are determined based on an analysis of the throughput. If the receiver cannot decode the current transmission, the transmitter repeats the computation to determine the modulation and the block length for retransmission.

    摘要翻译： 一种混合自动重传请求（ARQ）系统中分组传输的方法和系统。 基于每比特的平均互信息来确定传输的调制和块长度。 基于当前信道信噪比和多个先前传输来计算每比特的平均互信息，每个传输以相应的编码块长度，调制形式和信噪比进行传输。 基于每比特的平均互信息计算潜在块长度和调制的块错误率，并且基于块错误率来确定当前传输的吞吐量。 基于吞吐量的分析来确定传输的调制形式和块长度。 如果接收机不能解码当前的传输，则发射机重复计算以确定用于重传的调制和块长度。

    Precoding Selection for Retransmission in Uplink MIMO Hybrid ARQ
    7.
    发明申请
    Precoding Selection for Retransmission in Uplink MIMO Hybrid ARQ 有权
    上行MIMO混合ARQ中重传的预编码选择

    公开(公告)号：US20120082259A1

    公开(公告)日：2012-04-05

    申请号：US13252650

    申请日：2011-10-04

    申请人： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

    发明人： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

    IPC分类号： H04L25/03 ,  H04B15/00

    CPC分类号： H04B7/0456 ,  H04L1/0618 ,  H04L1/1896 ,  H04L25/03343 ,  H04L2025/03426

    摘要： A method includes obtaining a precoder for retransmission of one codeword responsive to a known precoding matrix of a certain rank and modulation and coding scheme assignments used in an original transmission, and a desired retransmission rank', forming an approximate channel covariance matrix; stimating an a minimum mean square error receiver signal-to-noise-interference-ratio for each layer to be retransmitted responsive to the prior forming; and finding a precoding matrix from a preceding codebook that maximizes a sum-rate for enabling precoding selections for retransmissions in uplink multiple-input multiple-output MIMO hybrid automatic repeat request HARQ.

    摘要翻译： 一种方法包括响应于某一秩的已知预编码矩阵和在原始传输中使用的调制和编码方案分配以及形成近似信道协方差矩阵的期望重传等级来获得用于重传一个码字的预编码器; 响应于先前的形成，针对要重传的每个层激发最小均方误差接收机的信噪比干扰比; 以及从上一个码本中找到一个预编码矩阵，该预编码矩阵使上行链路多输入多输出MIMO混合自动重复请求HARQ中的重传的预编码选择最大化。

    LT DECODING AND RETRANSMISSION FOR WIRELESS BROADCAST
    8.
    发明申请
    LT DECODING AND RETRANSMISSION FOR WIRELESS BROADCAST 有权
    LT无线广播解码和恢复

    公开(公告)号：US20110246848A1

    公开(公告)日：2011-10-06

    申请号：US13023667

    申请日：2011-02-09

    申请人： Guosen Yue ,  Momin A. Uppal ,  Xiaodong Wang

    发明人： Guosen Yue ,  Momin A. Uppal ,  Xiaodong Wang

    IPC分类号： H04L1/08 ,  H03M13/05 ,  G06F11/10 ,  G06F11/14

    CPC分类号： H04L1/0045 ,  H03M13/3723 ,  H03M13/3761 ,  H03M13/6306 ,  H04L1/1819

    摘要： Methods and systems for doped rateless retransmission include receiving ratelessly coded symbols. An attempt is made to decode the coded symbols using a processor by creating an associated code graph that represents the structure of the rateless code used by the symbols. If the decoding attempt fails, an input node is selected from the code graph using a metric that gauges the number and degree of connections to the input node based on the code graph structure. The selected input node is then requested for retransmission of the selected input node by a feedback channel.

    摘要翻译： 用于掺杂无错重传的方法和系统包括接收无编码符号。 尝试使用处理器来解码编码符号，通过创建代表由符号使用的无码代码的结构的相关联的代码图。 如果解码尝试失败，则使用使用基于代码图结构来衡量与输入节点的连接的数量和程度的度量从代码图中选择输入节点。 然后通过反馈信道请求所选择的输入节点来重传所选择的输入节点。

    Low-Complexity High-Performance Low-Rate Communications Codes
    9.
    发明申请
    Low-Complexity High-Performance Low-Rate Communications Codes 有权
    低复杂性高性能低速率通信代码

    公开(公告)号：US20080016426A1

    公开(公告)日：2008-01-17

    申请号：US11768585

    申请日：2007-06-26

    申请人： Kai Li ,  Guosen Yue ,  Xiaodong Wang ,  Mohammad Madihian

    发明人： Kai Li ,  Guosen Yue ,  Xiaodong Wang ,  Mohammad Madihian

    IPC分类号： H03M13/27

    CPC分类号： H03M13/1194 ,  H03M13/01 ,  H03M13/1111 ,  H03M13/1125 ,  H03M13/29 ,  H03M13/296 ,  H03M13/45

    摘要： An encoder includes an outer repetition encoder, an interleaver for permuting encoding from said outer repetition encoder; and an inner encoder for encoding information from the interleaver to provide a repeat zigzag-Hadamard code. In an exemplary embodiment, a common bit of a zigzag-Hadamard segment of encoding from said inner encoder is a repetition of a last parity bit of a previous zigzag-Hadamard segment of encoding from said inner encoder and said common bit is punctured.

    摘要翻译： 编码器包括外部重复编码器，用于从所述外部重复编码器排列编码的交织器; 以及内部编码器，用于对来自交织器的信息进行编码以提供重复锯齿形 - 哈达玛码。 在示例性实施例中，来自所述内部编码器的编码的锯齿形 - 哈达玛段的公共位是来自所述内部编码器的先前之字形 - 哈达玛编码段的最后奇偶校验位的重复，并且所述公共位被删截。

    System and Method for Low-Density Parity Check (LDPC) Code Design
    10.
    发明申请
    System and Method for Low-Density Parity Check (LDPC) Code Design 失效
    用于低密度奇偶校验（LDPC）码设计的系统和方法

    公开(公告)号：US20070113146A1

    公开(公告)日：2007-05-17

    申请号：US11533978

    申请日：2006-09-21

    申请人： Chuxiang Li ,  Guosen Yue ,  Mohammad Khojastepour ,  Xiadong Wang ,  Mohammad Madihian

    发明人： Chuxiang Li ,  Guosen Yue ,  Mohammad Khojastepour ,  Xiadong Wang ,  Mohammad Madihian

    IPC分类号： H03M13/00

    CPC分类号： H03M13/1105 ,  H03M13/033 ,  H03M13/6393

    摘要： Disclosed is a density evolution algorithm based on a refined definition of node and edge densities for different parts of the code. In particular, density functions ƒV(1)(i) and ƒV(2)(i) of the output edges of the variable nodes with degree i within different codeword regions w1 and we, respectively, are defined and then calculated. Further, density functions ƒC(1)(j) and ƒC(2)(j) of the output edges for check nodes with degree j within codeword regions w1 and we, respectively, are defined and then calculated. Mixture density functions of output check edges connecting variable nodes in the first codeword region and the second codeword region are then calculated to determine an LDPC code design.

    摘要翻译： 公开了基于代码不同部分的节点和边缘密度的精确定义的密度演化算法。 特别地，（i）和（ii）（i）的浓度函数f（i） 分别在不同码字区域w 1和w e e中的等级i的可变节点的输出边缘被分别定义然后被计算。 此外，密度函数f（1）（j）和（C）的密度函数 分别定义并且然后计算在码字区域w 1和w e e中的具有度j的校验节点的输出边缘。 然后计算连接第一码字区域和第二码字区域中的可变节点的输出校验边缘的混合密度函数，以确定LDPC码设计。