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    Traffic-to-pilot ratio estimation for MIMO-OFDM system
    1.
    发明授权
    Traffic-to-pilot ratio estimation for MIMO-OFDM system 失效
    MIMO-OFDM系统的业务导频比估计

    公开(公告)号：US08306165B2

    公开(公告)日：2012-11-06

    申请号：US12768305

    申请日：2010-04-27

    申请人： Yuheng Huang ,  Brian C. Banister

    发明人： Yuheng Huang ,  Brian C. Banister

    IPC分类号： H03D1/04

    CPC分类号： H04L27/2647 ,  H04B7/0434

    摘要： A method for estimating a traffic-to-pilot ratio (TPR) for a received signal is disclosed. The received signal is despatialized to obtain a despatialized received signal. A channel matrix is despatialized to obtain a despatialized channel matrix. The despatialized received signal is whitened to obtain a pre-whitened despatialized received signal. The despatialized channel matrix is whitened to obtain a pre-whitened despatialized channel matrix. The estimated TPR for the received signal is determined using the pre-whitened despatialized received signal and one or more pre-whitened despatialized channel estimation coefficients.

    摘要翻译： 公开了一种用于估计接收信号的业务导频比（TPR）的方法。 接收到的信号被去偏移以获得接收信号。 信道矩阵被去空间化以获得despatialized信道矩阵。 接收到的接收信号被白化，以获得预白化的despatialized接收信号。 将despatialized信道矩阵变白以获得预漂白的despatialized信道矩阵。 接收信号的估计TPR是使用预白化偏移接收信号和一个或多个预白化偏移信道估计系数来确定的。

    TRAFFIC-TO-PILOT RATIO ESTIMATION FOR MIMO-OFDM SYSTEM
    2.
    发明申请
    TRAFFIC-TO-PILOT RATIO ESTIMATION FOR MIMO-OFDM SYSTEM 失效
    MIMO-OFDM系统的交通对导频比估计

    公开(公告)号：US20100278290A1

    公开(公告)日：2010-11-04

    申请号：US12768305

    申请日：2010-04-27

    申请人： Yuheng Huang ,  Brian C. Banister

    发明人： Yuheng Huang ,  Brian C. Banister

    IPC分类号： H04B1/10

    CPC分类号： H04L27/2647 ,  H04B7/0434

    摘要： A method for estimating a traffic-to-pilot ratio (TPR) for a received signal is disclosed. The received signal is despatialized to obtain a despatialized received signal. A channel matrix is despatialized to obtain a despatialized channel matrix. The despatialized received signal is whitened to obtain a pre-whitened despatialized received signal. The despatialized channel matrix is whitened to obtain a pre-whitened despatialized channel matrix. The estimated TPR for the received signal is determined using the pre-whitened despatialized received signal and one or more pre-whitened despatialized channel estimation coefficients.

    摘要翻译： 公开了一种用于估计接收信号的业务导频比（TPR）的方法。 接收到的信号被去偏移以获得接收信号。 信道矩阵被去空间化以获得despatialized信道矩阵。 接收到的接收信号被白化，以获得预白化的despatialized接收信号。 将despatialized信道矩阵变白以获得预漂白的despatialized信道矩阵。 接收信号的估计TPR是使用预白化去偏移接收信号和一个或多个预白化偏移信道估计系数来确定的。

    METHOD AND APPARATUS FOR PERFORMING FREQUENCY SCAN FOR WIRELESS SYSTEMS WITH VARIABLE CHANNEL BANDWIDTH
    4.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING FREQUENCY SCAN FOR WIRELESS SYSTEMS WITH VARIABLE CHANNEL BANDWIDTH 审中-公开
    用于对具有可变通道带宽的无线系统进行频谱扫描的方法和装置

    公开(公告)号：US20130155883A1

    公开(公告)日：2013-06-20

    申请号：US13610652

    申请日：2012-09-11

    申请人： Supratik Bhattacharjee ,  Shivratna G. Srinivasan ,  Brian C. Banister ,  Hisham Mahmoud

    发明人： Supratik Bhattacharjee ,  Shivratna G. Srinivasan ,  Brian C. Banister ,  Hisham Mahmoud

    IPC分类号： H04W48/16 ,  H04J3/00 ,  H04W24/00

    CPC分类号： H04W48/16

    摘要： Techniques for performing a frequency scan to detect wireless systems operating on frequency channels with variable bandwidths are disclosed. In one aspect, a user equipment (UE) performs a frequency scan for a plurality of frequency channels and measures the received power of each frequency channel based on a center frequency and a bandwidth of the frequency channel. The UE identifies candidate frequency channels for acquisition based on the results of the frequency scan. In another aspect, a frequency scan of a band is performed by partitioning the band into multiple segments, measuring received powers of subcarriers or raster frequencies within each segment, and concatenating received powers of subcarriers or raster frequencies for all segments. A frequency scan is then performed based on the concatenated results for the multiple segments.

    摘要翻译： 公开了用于执行频率扫描以检测在具有可变带宽的频道上操作的无线系统的技术。 一方面，用户设备（UE）对多个频道执行频率扫描，并且基于频率信道的中心频率和带宽测量每个频道的接收功率。 基于频率扫描的结果，UE识别用于获取的候选频道。 在另一方面，通过将频带划分成多个段，测量每个段内的子载波的接收功率或光栅频率，以及连接所有段的子载波或光栅频率的接收功率来执行频带的频率扫描。 然后基于多个段的级联结果执行频率扫描。

    Noise reduction filtering in a wireless communication system
    6.
    发明授权
    Noise reduction filtering in a wireless communication system 有权
    无线通信系统中的降噪滤波

    公开(公告)号：US08243864B2

    公开(公告)日：2012-08-14

    申请号：US10994012

    申请日：2004-11-19

    申请人： Steven Ciccarelli ,  Arun Raghupathy ,  Brian C. Banister

    发明人： Steven Ciccarelli ,  Arun Raghupathy ,  Brian C. Banister

    IPC分类号： H04B1/10

    CPC分类号： H03H17/0009 ,  H03G3/3052 ,  H04B1/1036 ,  H04B1/707

    摘要： A technique for noise reduction in a wireless communication system uses controllable bandwidth filters (120) to filter a received signal. In a typical implementation, the filters (120) are used at baseband frequencies. A measurement (RSSI) is indicative of the strength of the received signal. A control circuit (144) generates a control signal (146) to control the bandwidth of the filters (120). If the received signal strength is above a first threshold, a wider bandwidth may be used for the filters (120). If the received signal is below a second threshold, the control circuit (144) generates the control signal (146) to set the filters (120) to a more narrow bandwidth. The system (100) may also be used with digital filters (150, 152) following digitization by analog to digital converters (ADCs) (130, 132). The system (100) is particularly well-suited for operation with noise-shaped ADCs (130, 132), such as Delta-Sigma converters.

    摘要翻译： 用于无线通信系统中降噪的技术使用可控带宽滤波器（120）来对接收到的信号进行滤波。 在典型的实现中，滤波器（120）用于基带频率。 测量（RSSI）表示接收信号的强度。 控制电路（144）产生控制信号（146）以控制滤波器（120）的带宽。 如果接收信号强度高于第一阈值，则可以对滤波器（120）使用更宽的带宽。 如果接收信号低于第二阈值，则控制电路（144）产生控制信号（146）以将滤波器（120）设置为更窄的带宽。 在数模转换器（ADC）（130,132）之后，系统（100）也可以与数字滤波器（150,152）一起使用。 系统（100）特别适用于具有噪声形状的ADC（130,132）（诸如Δ-Σ转换器）的操作。

    APPARATUS AND METHODS FOR DYNAMIC DATA-BASED SCALING OF DATA
    8.
    发明申请
    APPARATUS AND METHODS FOR DYNAMIC DATA-BASED SCALING OF DATA 有权
    用于基于动态数据的数据分级的装置和方法

    公开(公告)号：US20100250636A1

    公开(公告)日：2010-09-30

    申请号：US12732135

    申请日：2010-03-25

    申请人： Brian C. Banister ,  Surendra Boppana

    发明人： Brian C. Banister ,  Surendra Boppana

    IPC分类号： G06F7/60 ,  G06F17/14

    CPC分类号： G06F17/142 ,  H04L27/2628 ,  H04L27/265

    摘要： Disclosed are apparatus and methods for dynamic data-based scaling of data. The disclosed methods and apparatus involve storing one or more input data samples, which are to be scaled and input to a processing function such as a Fast Fourier Transform. A scaling value operable for scaling the one or more data samples is determined based on the one or more input data samples, and then the stored data samples are scaled based on the computed scaling value when read out of storage prior to the processing function. The scaling of data based on the input data allows the data to be scaled dynamically, not statically, and ensures that the data fits within a desired bit width constraint of the processing function thereby economizing processing resources.

    摘要翻译： 公开了用于基于动态数据的数据缩放的装置和方法。 所公开的方法和装置包括存储要被缩放和输入到诸如快速傅里叶变换的处理功能的一个或多个输入数据样本。 基于一个或多个输入数据样本来确定可操作用于缩放一个或多个数据样本的缩放值，然后当在处理功能之前读出存储器时，基于所计算的缩放值对存储的数据样本进行缩放。 基于输入数据的数据缩放允许动态地而不是静态地缩放数据，并确保数据符合处理功能的期望的位宽度约束，从而节省处理资源。

    Method and apparatus for applying overlaid perturbation vectors for gradient feedback transmit antenna array adaptation
    9.
    发明授权
    Method and apparatus for applying overlaid perturbation vectors for gradient feedback transmit antenna array adaptation 有权
    用于梯度反馈发射天线阵列适配的覆盖扰动矢量的方法和装置

    公开(公告)号：US07180956B1

    公开(公告)日：2007-02-20

    申请号：US10076925

    申请日：2002-02-14

    申请人： Brian C. Banister

    发明人： Brian C. Banister

    IPC分类号： H04B7/02 ,  H04L1/02

    CPC分类号： H04B7/0641 ,  H04B7/0634 ,  H04L1/0026 ,  Y02D70/144 ,  Y02D70/444

    摘要： A novel method and apparatus for applying overlaid perturbation vectors for gradient feedback transmit antenna array adaptation is disclosed. The method and apparatus of the present invention allows a communication system to reduce transmit power that is associated with dedicated pilot signals by overlaying perturbation vectors and measuring channel estimates and demodulation channel estimates during a measurement time interval that comprises a plurality of feedback time intervals. The present inventive method utilizes channel estimates that include the effects of previous perturbation vectors, subsequent feedback vectors and intermediate feedback decisions. The inventive method extracts a coarse gradient estimate by utilizing a continuous summation of overlaid weight vector perturbation vectors and updates the weighting vector accordingly.

    摘要翻译： 公开了一种用于对梯度反馈发射天线阵列适配应用覆盖扰动矢量的新颖方法和装置。 本发明的方法和装置允许通信系统通过覆盖扰动向量来减少与专用导频信号相关联的发射功率，并且在包括多个反馈时间间隔的测量时间间隔期间测量信道估计和解调信道估计。 本发明的方法利用包括先前扰动矢量，后续反馈矢量和中间反馈决策的影响的信道估计。 本发明方法通过利用覆盖权重向量扰动向量的连续求和提取粗略梯度估计，并相应地更新加权向量。

    Method and system for preventing information losses during alternative frequency searches
    10.
    发明授权
    Method and system for preventing information losses during alternative frequency searches 失效
    用于在替代频率搜索期间防止信息丢失的方法和系统

    公开(公告)号：US06169752A

    公开(公告)日：2001-01-02

    申请号：US09031078

    申请日：1998-02-26

    申请人： Brian C. Banister

    发明人： Brian C. Banister

    IPC分类号： H04J307

    CPC分类号： H04W36/02 ,  H04W52/38 ,  H04W88/02

    摘要： A method and system for preventing information losses during alternative frequency searches by a receiving unit in a communication system in which data is channel coded, interleaved, and segmented into a plurality of frames. The method comprises the steps of discontinuing demodulation at a predetermined time before a frame ends, inserting zero values into the frame, and performing a search for alternative frequencies while continuing to insert zero values into the frame and then a next frame. After the search is completed, insertion of zero values is discontinued and demodulation is resumed. In one preferred version, the receiving unit comprises a mobile radio station operating at a serving frequency. The step of inserting zero values is followed by a step of programming the mobile radio station to a search frequency and waiting for the mobile radio station to settle. The step of discontinuing insertion of zero values is preceded by a step of programming the mobile radio station to the serving frequency and waiting for the mobile radio station to settle.

    摘要翻译： 一种在数据被信道编码，交织和分段成多个帧的通信系统中由接收单元在替代频率搜索期间防止信息丢失的方法和系统。 该方法包括以下步骤：在帧结束之前的预定时间停止解调，将零值插入到帧中，并且在继续将零值插入到帧中然后再下一帧的同时执行替代频率的搜索。 搜索完成后，中断插入零值，并恢复解调。 在一个优选版本中，接收单元包括以服务频率工作的移动无线电台。 插入零值的步骤之后是将移动无线电台编程到搜索频率并等待移动无线电台定居的步骤。 停止插入零值的步骤之前是将移动无线电台编程到服务频率并等待移动无线电台定居的步骤。