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124 条记录 (耗时 0.036 秒)

    Power scaling for retransmissions in uplink MIMO hybrid ARQ
    31.
    发明授权
    Power scaling for retransmissions in uplink MIMO hybrid ARQ 有权
    上行链路MIMO混合ARQ中的重传功率缩放

    公开(公告)号：US08891677B2

    公开(公告)日：2014-11-18

    申请号：US13292659

    申请日：2011-11-09

    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： H04L27/00 ,  H04L25/03 ,  H04L5/00 ,  H04W52/48 ,  H04L1/18 ,  H04L1/00

    CPC分类号： H04L5/0055 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/1819 ,  H04L1/1867 ,  H04L25/03923 ,  H04W52/48

    摘要： A method includes obtaining a precoder for retransmission of one codeword responsive to known precoding matrix P of rank r and modulation and coding scheme MCS assignments used in an original transmission, and a desired retransmission rank r′; and scaling power in the retransmission responsive to at least two of 1) information parameters Index of UL precoder in previous transmission, 2) rank r of uplink UL precoder in previous transmission, 3) MCS assignments in previous retransmission (MCSi), 4) rank r′ for UL retransmission 5) number of retransmit antennas used for codeword to be retransmitted x in previous transmission, 6) number of retransmit antennas x′ used for retransmission, 7) precoder for UL retransmission, 8) UL precoders and channel information for previous transmission, and 8) latest channel measurements.

    摘要翻译： 一种方法包括响应于已知的秩r的预编码矩阵P以及在原始传输中使用的调制和编码方案MCS分配以及期望的重传等级r'，获得用于重传一个码字的预编码器。 并且响应于以前的传输中的UL预编码器的信息参数索引中的至少两个，2）先前传输中的上行链路UL预编码器的秩r，先前传输中的MCS分配（MCSi），4）等级 r'用于UL重传5）用于先前传输中的要重发的码字的重传天线数x 6用于重传的重传天线数x'7）用于UL重传的预编码器8）UL预编码器和用于前一个传输的信道信息 传输，以及8）最新的频道测量。

    Receiver with prefiltering for discrete fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) based systems
    34.
    发明授权
    Receiver with prefiltering for discrete fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) based systems 有权
    具有用于离散傅里叶变换扩展正交频分复用（DFT-S-OFDM）的系统的预滤波的接收机

    公开(公告)号：US08576959B2

    公开(公告)日：2013-11-05

    申请号：US12425080

    申请日：2009-04-16

    申请人： Narayan Prasad ,  Xiaodong Wang ,  Shuangquan Wang

    发明人： Narayan Prasad ,  Xiaodong Wang ,  Shuangquan Wang

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2647 ,  H04L25/03159 ,  H04L25/067

    摘要： A receiver for discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) based systems, including a prefilter for received signal codeword(s); and a log-likelihood ratio LLR module responsive to the prefilter; wherein the prefilter includes a pairing and whitening module that based on channel estimates and data rate enables the LLR module to perform either a Serial-In-Serial-Out (SISO) based log likelihood ratio processing of an output from the paring and whitening module or a two-symbol max-log soft output demodulator (MLSD) based log likelihood ratio processing of an output from the pairing and whitening module.

    摘要翻译： 一种用于离散傅里叶变换扩展正交频分复用（DFT-S-OFDM）系统的接收机，包括用于接收信号码字的预滤波器; 以及响应于所述预过滤器的对数似然比LLR模块; 其中所述预过滤器包括配对和增白模块，其基于信道估计和数据速率使得所述LLR模块能够执行基于串行输出（SISO）的对数似然比处理来自所述配对和增白模块的输出， 来自配对和增白模块的输出的基于双符号最大对数软输出解调器（MLSD）的对数似然比处理。

    Robust linear precoder designs for multi-cell downlink transmission
    35.
    发明授权
    Robust linear precoder designs for multi-cell downlink transmission 有权
    用于多小区下行链路传输的鲁棒线性预编码器设计

    公开(公告)号：US08520762B2

    公开(公告)日：2013-08-27

    申请号：US13414110

    申请日：2012-03-07

    申请人： Ali Tajer ,  Narayan Prasad ,  Xiaodong Wang ,  Sampath Rangarajan

    发明人： Ali Tajer ,  Narayan Prasad ,  Xiaodong Wang ,  Sampath Rangarajan

    IPC分类号： H04B7/02 ,  H04L1/02

    CPC分类号： H04B7/0626 ,  H04B7/022

    摘要： Methods and systems for optimizing the utilities of receiver devices in a wireless communication network are disclosed. Precoder design formulations that maximize a minimum worst-case rate or a worst-case sum rate are described for both full base station, cooperation and limited base station cooperation scenarios. In addition, optimal equalizers are also selected to optimize the worst-case sum rate.

    摘要翻译： 公开了用于优化无线通信网络中的接收机设备的实用性的方法和系统。 对于完整的基站，合作和有限的基站合作情况，都会描述最大化最小最坏情况速率或最差情况下的总速率的预编码器设计公式。 此外，还选择最佳均衡器来优化最差情况下的和速率。

    Selective joint demodulation
    36.
    发明授权
    Selective joint demodulation 有权
    选择性联合解调

    公开(公告)号：US08503554B2

    公开(公告)日：2013-08-06

    申请号：US13088955

    申请日：2011-04-18

    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： H04L27/28

    CPC分类号： H04B7/0452 ,  H04J11/0046 ,  H04L5/0023 ,  H04L25/03331 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/34 ,  H04W72/042 ,  H04W72/12

    摘要： Systems, methods and apparatuses for jointly demodulating data signals are disclosed. In accordance with the method, pilot signals are received from a base station and are processed. In addition, from a set of expected co-scheduled data streams, a subset of the co-scheduled data streams that are actually transmitted by the base station are determined based on the pilot signals. Further, a group of the transmitted co-scheduled data streams are selected from the determined subset. The data signals are received and jointly demodulated by employing the selected group of co-scheduled data streams and by suppressing non-selected data streams from the determined subset.

    摘要翻译： 公开了用于联合解调数据信号的系统，方法和装置。 根据该方法，从基站接收导频信号并进行处理。 另外，从一组期望的共同调度数据流中，基于导频信号确定由基站实际发送的协同调度数据流的子集。 此外，从确定的子集中选择一组发送的协调调度数据流。 通过采用所选择的协同调度数据流组并通过从所确定的子集抑制未选择的数据流来接收和联合地解调数据信号。

    Coordinated linear beamforming in downlink multi-cell wireless networks
    37.
    发明授权
    Coordinated linear beamforming in downlink multi-cell wireless networks 有权
    下行链路多小区无线网络中的协调线性波束成形

    公开(公告)号：US08488440B2

    公开(公告)日：2013-07-16

    申请号：US13414202

    申请日：2012-03-07

    申请人： Luca Venturino ,  Xiaodong Wang ,  Narayan Prasad

    发明人： Luca Venturino ,  Xiaodong Wang ,  Narayan Prasad

    IPC分类号： H04J11/00

    CPC分类号： H04W16/28

    摘要： System and methods are disclosed for optimizing wireless communication for a plurality of mobile wireless devices. The system uses beamforming vectors or precoders having a structure optimal with respect to the weighted sum rate in a multi-cell orthogonal frequency division multiple access (OFDMA) downlink. A plurality of base stations communicate with the mobile devices and all base stations perform a distributed non-convex optimization exploiting the determined structure.

    摘要翻译： 公开了用于优化多个移动无线设备的无线通信的系统和方法。 该系统在多小区正交频分多址（OFDMA）下行链路中使用具有关于加权和速率最优的结构的波束成形向量或预编码器。 多个基站与移动设备进行通信，并且所有基站使用所确定的结构来执行分布式非凸优化。

    Distributed message-passing based resource allocation in wireless systems
    38.
    发明授权
    Distributed message-passing based resource allocation in wireless systems 有权
    无线系统中基于分布式消息传递的资源分配

    公开(公告)号：US08385364B2

    公开(公告)日：2013-02-26

    申请号：US12549546

    申请日：2009-08-28

    申请人： Kai Yang ,  Xiaodong Wang ,  Narayan Prasad

    发明人： Kai Yang ,  Xiaodong Wang ,  Narayan Prasad

    IPC分类号： H04J3/16

    CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0039 ,  H04L5/0044 ,  H04L5/0071 ,  H04L5/0076

    摘要： Systems and methods are disclosed to allocate resources in discrete Fourier transform spread orthogonal frequency division multiple access (DFT-S-OFDMA) networks, which involve determining a reward for each user when assigned a frequency chunk (FC) of subcarriers, where each FC is a set of contiguous subcarriers; splitting each user into one or more sub-users, with each sub-user having identical rewards; and assigning resources with a message-passing based FC allocation.

    摘要翻译： 公开了系统和方法来分配离散傅立叶变换扩展正交频分多址（DFT-S-OFDMA）网络中的资源，这些网络涉及当分配子载波的频率块（FC）时确定每个用户的奖励，其中每个FC 一组连续的副载波; 将每个用户分成一个或多个子用户，每个子用户具有相同的奖励; 并使用基于消息传递的FC分配来分配资源。

    Polmux-OFDM-DD Transmitter and Receiver for Reduced Complexity and Overhead in Optical Access/Metro Transmission
    39.
    发明申请
    Polmux-OFDM-DD Transmitter and Receiver for Reduced Complexity and Overhead in Optical Access/Metro Transmission 有权
    Polmux-OFDM-DD发射机和接收机，用于降低光接入/城域传输中的复杂性和开销

    公开(公告)号：US20120263467A1

    公开(公告)日：2012-10-18

    申请号：US13446306

    申请日：2012-04-13

    申请人： Neda Cvijetic ,  Yue-Kai Huang ,  Narayan Prasad ,  Ting Wang

    发明人： Neda Cvijetic ,  Yue-Kai Huang ,  Narayan Prasad ,  Ting Wang

    IPC分类号： H04J14/06

    CPC分类号： H04J14/06 ,  H04B10/532 ,  H04B10/548 ,  H04J14/02 ,  H04L5/0023 ,  H04L25/0204 ,  H04L27/2096 ,  H04L27/223 ,  H04L27/2697 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： An optical communication system includes a polarization multiplexed orthogonal frequency-division multiplexing POLMUX-OFDM transmitter for generating a POLMUX-OFDM double sideband signal, an optical processing path for processing the double sideband signal from the transmitter; an analog-to-digital convert ADC-OFDM receiver coupled to the optical processing path for receiving the double sideband signal processed by the optical path; and a block-diagonal multiple-input multiple-output MIMO equalizer responsive to the receiver for enabling correct operation for a completely random incoming signal polarization state without adaptive polarization control at said receiver, which enables complexity.

    摘要翻译： 光通信系统包括用于产生POLMUX-OFDM双边带信号的偏振复用正交频分复用POLMUX-OFDM发射机，用于处理来自发射机的双边带信号的光处理路径; 耦合到光学处理路径的用于接收由光路处理的双边带信号的模数转换ADC-OFDM接收器; 以及响应于接收机的块对角多输入多输出MIMO均衡器，用于使能在所述接收机处没有自适应偏振控制的完全随机输入信号偏振状态的正确操作，这使得复杂性。