利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

16 条记录 (耗时 0.017 秒)

    Noise power thresholding and balancing for long term evolution (LTE) symbol detection
    1.
    发明授权
    Noise power thresholding and balancing for long term evolution (LTE) symbol detection 有权
    用于长期演进（LTE）符号检测的噪声功率阈值和平衡

    公开(公告)号：US08724754B2

    公开(公告)日：2014-05-13

    申请号：US13597738

    申请日：2012-08-29

    申请人： Thomas P. Krauss ,  Bryan S. Nollett ,  Anthony R. Schooler

    发明人： Thomas P. Krauss ,  Bryan S. Nollett ,  Anthony R. Schooler

    IPC分类号： H04B7/10

    CPC分类号： H04B7/0854 ,  H04B7/0857 ,  H04L5/0023 ,  H04L25/03178 ,  H04L25/03254 ,  H04L25/03292

    摘要： A noise thresholder of a baseband modem integrated circuit (BMIC) compares measured noise variances on corresponding receiver paths to a pre-established threshold minimum value. The noise thresholder assigns as a noise variance value for a corresponding receiver path either (a) a measured noise variance value for each receiver path having a measured noise variance that is larger than the pre-established threshold minimum, and (b) the pre-established threshold minimum value for each receiver path having a measured noise variance that is less than or equal to the pre-established threshold minimum value. A noise balancer performs noise balancing to provide a same signal to noise ratio (SNR) across all receiver paths, based on the assigned noise variances provided at the noise thresholder. A detection engine utilizes a lowest assigned noise variance value and outputs yielded by the noise balancer to simplify equalization computations while providing a high performance symbol detection capability.

    摘要翻译： 基带调制解调器集成电路（BMIC）的噪声阈值器将相应接收器路径上的测量的噪声方差与预先建立的阈值最小值进行比较。 噪声阈值分配器作为相应接收机路径的噪声方差值，分配（a）每个具有大于预先设定的阈值最小值的噪声方差的接收机路径的测量噪声方差值，以及（b） 具有小于或等于预先建立的阈值最小值的测量噪声方差的每个接收器路径的建立阈值最小值。 噪声平衡器基于在噪声阈值器处提供的分配的噪声方差来执行噪声平衡以在所有接收机路径上提供相同的信噪比（SNR）。 检测引擎利用噪声平衡器产生的最低分配噪声方差值和输出，以简化均衡计算，同时提供高性能符号检测能力。

    SYSTEM AND METHOD FOR COMBINATION MULTIPLE INPUT, MULTIPLE OUTPUT (MIMO) AND BEAMFORMING
    3.
    发明申请
    SYSTEM AND METHOD FOR COMBINATION MULTIPLE INPUT, MULTIPLE OUTPUT (MIMO) AND BEAMFORMING 有权
    用于组合多输入，多输出（MIMO）和波束形成的系统和方法

    公开(公告)号：US20100158151A1

    公开(公告)日：2010-06-24

    申请号：US12340857

    申请日：2008-12-22

    申请人： Thomas P. Krauss ,  Frederick W. Vook ,  Xiangyang Zhaung

    发明人： Thomas P. Krauss ,  Frederick W. Vook ,  Xiangyang Zhaung

    IPC分类号： H04B7/02

    CPC分类号： H04B7/0413 ,  H04B7/0617 ,  H04B7/10 ,  H04B17/21

    摘要： Specifically, a method and system that performs MIMO and beamforming at a base station based on an uplink channel sounding (ULCS) from only one of the mobile station antennas and closed-loop multiple input, multiple output (MIMO) schemes based on the singular value decomposition (SVD) of the channel matrix. The ULCS is limited to sounding and the channel uses fewer than an optimal number of transmit antennas (e.g. one for WiMAX). The base station arrays may be configured for a full array transmitting mode or a sub-array transmitting mode.

    摘要翻译： 具体地说，一种基于仅从移动台天线和闭环多路输入，基于奇异值的多输出（MIMO）方案中的上行链路信道探测（ULCS）在基站执行MIMO和波束成形的方法和系统 信道矩阵的分解（SVD）。 ULCS仅限于探测，并且该信道使用少于最佳数量的发射天线（例如一个用于WiMAX）。 基站阵列可以被配置为全阵列发送模式或子阵列发送模式。

    Method and apparatus for transmission and reception within an OFDM communication system
    5.
    发明授权
    Method and apparatus for transmission and reception within an OFDM communication system 有权
    用于OFDM通信系统内的发送和接收的方法和装置

    公开(公告)号：US06999467B2

    公开(公告)日：2006-02-14

    申请号：US10628680

    申请日：2003-07-28

    申请人： Thomas P. Krauss ,  Kevin L. Baum ,  Vijay Nangia

    发明人： Thomas P. Krauss ,  Kevin L. Baum ,  Vijay Nangia

    IPC分类号： H04B7/216 ,  H04J11/00

    CPC分类号： H04L5/0021 ,  H04L5/0048 ,  H04L25/0202

    摘要： A staggered spread OFCDM scheme is utilized that improves channel estimation. In a first embodiment, each chip stream is time shifted by a predetermined amount and then transmitted on a predetermined subcarrier. This results in time-spread symbols being staggered (time-offset) on different subcarriers allowing for more frequent sampling of the channel. In a second embodiment a staggered spreading approach is applied in the frequency dimension to improve the performance of a system with spreading in the frequency dimension.

    摘要翻译： 利用交错的扩展OFCDM方案来改进信道估计。 在第一实施例中，每个芯片流被时移一预定量，然后在预定的子载波上传输。 这导致时间扩展符号在不同子载波上交错（时间偏移），允许更频繁地对信道进行采样。 在第二实施例中，在频率维度中应用交错扩展方法以改善在频率维度上扩展的系统的性能。

    Receiver having multi-antenna log likelihood ratio generation with channel estimation error
    7.
    发明授权
    Receiver having multi-antenna log likelihood ratio generation with channel estimation error 有权
    具有信道估计误差的具有多天线对数似然比的接收机

    公开(公告)号：US08116242B2

    公开(公告)日：2012-02-14

    申请号：US11458369

    申请日：2006-07-18

    申请人： Timothy A Thomas ,  Thomas P Krauss

    发明人： Timothy A Thomas ,  Thomas P Krauss

    IPC分类号： H04B7/00

    CPC分类号： H04L1/0656 ,  H04L1/0052 ,  H04L1/0055 ,  H04L25/0204 ,  H04L25/03242 ,  H04L25/03292 ,  H04L25/03318

    摘要： A receiver and methods of operation wherein Log-Likelihood-Ratio calculation are performed for arbitrary channel estimators with linear Minimum-Mean-Square-Error (MMSE) combining, successive cancellation combining, or joint detection. In some embodiments, the use of linear MMSE or successive cancellation combining may be employed to greatly lower the computational complexity over joint detection.In (401) a channel estimation MSE as a function of frequency, the transmitter modulation type, and a noise power are provided to the LLR component (313). A signal from a transmitter is received at one of the various antennas (301), (303) and respective receiver component (305), (307) in block (403). The channel estimation component (309) computes a channel estimate for the signal from the transmitter, or computes multiple channel estimates for multiple transmitter sources, in block (405). In block (407), decoder inputs are determined as a function of the channel estimates, the received signal, noise power, and channel estimation MSE.

    摘要翻译： 一种接收机和操作方法，其中对具有线性最小均方误差（MMSE）组合，连续消除组合或联合检测的任意信道估计器执行对数似然比计算。 在一些实施例中，可以采用线性MMSE或连续消除组合的使用以大大降低联合检测的计算复杂度。 在（401）中，向LLR分量（313）提供作为频率的函数的信道估计MSE，发射机调制类型和噪声功率。 来自发射机的信号在块（403）中的各种天线（301），（303）和相应接收机组件（305），（307）中的一个处被接收。 在块（405）中，信道估计组件（309）计算来自发射机的信号的信道估计，或计算多个发射机源的多个信道估计。 在块（407）中，解码器输入被确定为信道估计，接收信号，噪声功率和信道估计MSE的函数。

    Receiver Having Multi-Antenna Log Likelihood Ratio Generation With Channel Estimation Error
    8.
    发明申请
    Receiver Having Multi-Antenna Log Likelihood Ratio Generation With Channel Estimation Error 有权
    具有信道估计误差的具有多天线对数似然比的接收机

    公开(公告)号：US20080019331A1

    公开(公告)日：2008-01-24

    申请号：US11458369

    申请日：2006-07-18

    申请人： Timothy A. Thomas ,  Thomas P. Krauss

    发明人： Timothy A. Thomas ,  Thomas P. Krauss

    IPC分类号： H04Q7/24

    CPC分类号： H04L1/0656 ,  H04L1/0052 ,  H04L1/0055 ,  H04L25/0204 ,  H04L25/03242 ,  H04L25/03292 ,  H04L25/03318

    摘要： A receiver and methods of operation wherein Log-Likelihood-Ratio calculation are performed for arbitrary channel estimators with linear Minimum-Mean-Square-Error (MMSE) combining, successive cancellation combining, or joint detection. In some embodiments, the use of linear MMSE or successive cancellation combining may be employed to greatly lower the computational complexity over joint detection.In (401) a channel estimation MSE as a function of frequency, the transmitter modulation type, and a noise power are provided to the LLR component (313). A signal from a transmitter is received at one of the various antennas (301), (303) and respective receiver component (305), (307) in block (403). The channel estimation component (309) computes a channel estimate for the signal from the transmitter, or computes multiple channel estimates for multiple transmitter sources, in block (405). In block (407), decoder inputs are determined as a function of the channel estimates, the received signal, noise power, and channel estimation MSE.

    摘要翻译： 一种接收机和操作方法，其中对具有线性最小均方误差（MMSE）组合，连续消除组合或联合检测的任意信道估计器执行对数似然比计算。 在一些实施例中，可以采用线性MMSE或连续消除组合的使用以大大降低联合检测的计算复杂度。 在（401）中，向LLR分量（313）提供作为频率的函数的信道估计MSE，发射机调制类型和噪声功率。 来自发射机的信号在块（403）中的各种天线（301），（303）和相应接收机组件（305），（307）中的一个处被接收。 在块（405）中，信道估计组件（309）计算来自发射机的信号的信道估计，或计算多个发射机源的多个信道估计。 在块（407）中，根据信道估计，接收信号，噪声功率和信道估计MSE确定解码器输入。

    Method and apparatus for transmission and reception within an OFDM communication system
    9.
    发明授权
    Method and apparatus for transmission and reception within an OFDM communication system 有权
    用于OFDM通信系统内的发送和接收的方法和装置

    公开(公告)号：US07242722B2

    公开(公告)日：2007-07-10

    申请号：US10945692

    申请日：2004-09-21

    申请人： Thomas P. Krauss ,  Kevin L. Baum ,  Vijay Nangia

    发明人： Thomas P. Krauss ,  Kevin L. Baum ,  Vijay Nangia

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L5/0021 ,  H04B7/068 ,  H04L5/0026 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2613

    摘要： In an OFDM system the same Walsh code is used at the same time for a plurality of transmitters. The multiple transmitters can be from the same, or different devices (e.g., different base stations on the downlink, different terminals on the uplink). Each subcarrier/antenna combination will share a similar pilot Walsh code, except for the fact that the scrambled spread pilot signals will be phase shifted on some subcarriers of some antennas, based on the subcarrier/antenna combination.

    摘要翻译： 在OFDM系统中，相同的沃尔什码同时用于多个发射机。 多个发射机可以来自相同或不同的设备（例如，下行链路上的不同基站，上行链路上的不同终端）。 每个子载波/天线组合将共享类似的导频沃尔什码，除了基于副载波/天线组合，扰频扩频导频信号将在一些天线的某些子载波上相移的事实。

    Flexible low complexity reference signal filtering for LTE receivers
    10.
    发明授权
    Flexible low complexity reference signal filtering for LTE receivers 有权
    用于LTE接收机的灵活低复杂度参考信号滤波

    公开(公告)号：US08873504B2

    公开(公告)日：2014-10-28

    申请号：US13597819

    申请日：2012-08-29

    申请人： Bryan W. Zancho ,  Thomas P. Krauss ,  Bryan S. Nollett ,  David L. Steckl

    发明人： Bryan W. Zancho ,  Thomas P. Krauss ,  Bryan S. Nollett ,  David L. Steckl

    IPC分类号： H04L5/22

    CPC分类号： H04L25/0212 ,  H04L25/022 ,  H04L25/0224

    摘要： A method and system generates channel response estimates by performing time direction filtering of first channel estimates obtained from frequency direction filtering. A baseband integrated circuit (BBIC) receives information signals comprising reference signals, control signals provided by physical control channels, and data signals provided by physical data channels. Using a latency requirement of a physical channel, symbol selection logic selects valid reference signal symbol positions corresponding to first channel estimates from among frequency filtered received reference signals. A coefficient set selection logic selects a set of filter coefficients from among multiple sets of pre-optimized coefficients, utilizing at least one of (a) the latency requirement, (b) a channel condition, and (c) the selected reference signal symbol positions. A time direction filter uses the selected filter coefficients to filter the first channel estimates in order to generate a channel response estimate for a resource element of the physical channel.

    摘要翻译： 方法和系统通过对从频率方向滤波获得的第一信道估计进行时间方向滤波来产生信道响应估计。 基带集成电路（BBIC）接收包括参考信号，由物理控制信道提供的控制信号和由物理数据信道提供的数据信号的信息信号。 使用物理信道的等待时间要求，符号选择逻辑从经频率滤波的接收参考信号中选择对应于第一信道估计的有效参考信号符号位置。 系数组选择逻辑利用（a）等待时间要求，（b）信道条件和（c）所选择的参考信号符号位置中的至少一个，从多组预优化系数中选择一组滤波器系数 。 时间方向滤波器使用所选择的滤波器系数来对第一信道估计进行滤波，以便为物理信道的资源元素生成信道响应估计。