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    METHOD AND APPARATUS FOR PREDICTING CHANNEL QUALITY INDICATOR IN A HIGH SPEED DOWNLINK PACKET ACCESS SYSTEM
    3.
    发明申请
    METHOD AND APPARATUS FOR PREDICTING CHANNEL QUALITY INDICATOR IN A HIGH SPEED DOWNLINK PACKET ACCESS SYSTEM 审中-公开
    在高速下行分组接入系统中预测通道质量指示器的方法和装置

    公开(公告)号：US20100135172A1

    公开(公告)日：2010-06-03

    申请号：US12554202

    申请日：2009-09-04

    申请人： Tao Cui ,  Feng Lu ,  Anil Kumar Goteti ,  Vignesh Sethuraman ,  Subramanya P. Rao ,  Parvathanathan Subrahmanya

    发明人： Tao Cui ,  Feng Lu ,  Anil Kumar Goteti ,  Vignesh Sethuraman ,  Subramanya P. Rao ,  Parvathanathan Subrahmanya

    IPC分类号： H04L12/26

    CPC分类号： H04W72/1231

    摘要： Various embodiments are disclosed which predict the channel quality indicator (CQI) in High Speed Downlink Packet Access (HSDPA). The accuracy of CQI is crucial for HSDPA performance. In some HSDPA systems the CQI may be as much as three (3) subframes stale. Accordingly, the prediction of CQI values is required in order to efficiently schedule data for transmission over the communication channel. Various embodiments disclose first order adaptive IIR filters which are significantly less complex than the finite impulse response (FIR) counterparts and achieve similar accuracy. By minimizing the mean squared error (MSE), an exact gradient descent algorithm may be used as well as two embodiment pseudolinear regression algorithms.

    摘要翻译： 公开了预测高速下行链路分组接入（HSDPA）中的信道质量指示符（CQI）的各种实施例。 对于HSDPA性能，CQI的准确性至关重要。 在一些HSDPA系统中，CQI可能多达三（3）个子帧。 因此，需要CQI值的预测，以便有效地调度通过通信信道传输的数据。 各种实施例公开了比有限脉冲响应（FIR）对应物复杂得多的一阶自适应IIR滤波器，并且实现类似的精度。 通过最小化均方误差（MSE），可以使用精确的梯度下降算法以及两个实施例的伪线性回归算法。

    Phase-noise resilient generation of a channel quality indicator
    4.
    发明授权
    Phase-noise resilient generation of a channel quality indicator 失效
    通道质量指标的相位噪声弹性产生

    公开(公告)号：US08477888B2

    公开(公告)日：2013-07-02

    申请号：US12145322

    申请日：2008-06-24

    申请人： Feng Lu ,  Prashant Udupa Sripathi ,  Liang Zhao ,  Parvathanathan Subrahmanya ,  Subramanya P. Rao

    发明人： Feng Lu ,  Prashant Udupa Sripathi ,  Liang Zhao ,  Parvathanathan Subrahmanya ,  Subramanya P. Rao

    IPC分类号： H03D1/04

    CPC分类号： H04W52/245 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/241 ,  H04W52/243

    摘要： System(s) and method(s) are provided for generating phase-noise resilient channel quality indicator(s). A pilot signal utilized to determine a channel quality indicator is rotated to be aligned to a phase reference signal. Separate noise evaluations in quadrature and in-phase directions are utilized, at least in part, to generate a net noise estimate that is phase-noise compensated or resilient. For example, various combination schemes of quadrature and in-phase noise evaluations can be exploited to generate a net noise estimate, the schemes include weighted average of in-phase and quadrature noise estimates and running averages thereof. Simulation of net noise estimates as a function of geometry conditions reveal that the combination schemes provide substantive mitigation of phase-noise, thus making CQI generation phase-noise resilient.

    摘要翻译： 提供了用于产生相位噪声弹性信道质量指示符的系统和方法。 用于确定信道质量指示符的导频信号被旋转以与相位参考信号对准。 至少部分地利用正交和同相方向上的独立噪声评估来产生相位噪声补偿或弹性的净噪声估计。 例如，可以利用正交和同相噪声评估的各种组合方案来产生净噪声估计，该方案包括同相和正交噪声估计的加权平均值及其运行平均值。 作为几何条件的函数的净噪声估计的模拟表明，组合方案提供了相位噪声的实质性减轻，从而使得CQI生成相位噪声具有弹性。

    PHASE-NOISE RESILIENT GENERATION OF A CHANNEL QUALITY INDICATOR
    5.
    发明申请
    PHASE-NOISE RESILIENT GENERATION OF A CHANNEL QUALITY INDICATOR 失效
    通道质量指标的相位噪声生成

    公开(公告)号：US20090316842A1

    公开(公告)日：2009-12-24

    申请号：US12145322

    申请日：2008-06-24

    申请人： Feng Lu ,  Prashant Udupa Sripathi ,  Liang Zhao ,  Parvathanathan Subrahmanya ,  Subramanya P. Rao

    发明人： Feng Lu ,  Prashant Udupa Sripathi ,  Liang Zhao ,  Parvathanathan Subrahmanya ,  Subramanya P. Rao

    IPC分类号： H04B1/10

    CPC分类号： H04W52/245 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/241 ,  H04W52/243

    摘要： System(s) and method(s) are provided for generating phase-noise resilient channel quality indicator(s). A pilot signal utilized to determine a channel quality indicator is rotated to be aligned to a phase reference signal. Separate noise evaluations in quadrature and in-phase directions are utilized, at least in part, to generate a net noise estimate that is phase-noise compensated or resilient. For example, various combination schemes of quadrature and in-phase noise evaluations can be exploited to generate a net noise estimate, the schemes include weighted average of in-phase and quadrature noise estimates and running averages thereof. Simulation of net noise estimates as a function of geometry conditions reveal that the combination schemes provide substantive mitigation of phase-noise, thus making CQI generation phase-noise resilient.

    摘要翻译： 提供了用于产生相位噪声弹性信道质量指示符的系统和方法。 用于确定信道质量指示符的导频信号被旋转以与相位参考信号对准。 至少部分地利用正交和同相方向上的独立噪声评估来产生相位噪声补偿或弹性的净噪声估计。 例如，可以利用正交和同相噪声评估的各种组合方案来产生净噪声估计，该方案包括同相和正交噪声估计的加权平均值及其运行平均值。 作为几何条件的函数的净噪声估计的模拟表明，组合方案提供了相位噪声的实质性减轻，从而使得CQI生成相位噪声具有弹性。

    Method and apparatus for deriving a channel impulse response estimate for a wireless channel
    6.
    发明申请
    Method and apparatus for deriving a channel impulse response estimate for a wireless channel 有权
    用于导出无线信道的信道脉冲响应估计的方法和装置

    公开(公告)号：US20070110127A1

    公开(公告)日：2007-05-17

    申请号：US11399886

    申请日：2006-04-07

    申请人： Gokhan Mergen ,  Vignesh Sethuraman ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

    发明人： Gokhan Mergen ,  Vignesh Sethuraman ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

    IPC分类号： H04B1/00 ,  H04L27/06 ,  H04B1/10

    CPC分类号： H04L25/0216 ,  H04L25/0218

    摘要： Techniques for deriving a channel impulse response estimate (CIRE) having improved quality are described. A first CIRE with multiple channel taps is obtained based on (1) an initial CIRE derived from a received pilot or (2) a filtered CIRE derived from the initial CIRE. In one aspect, the channel taps in the first CIRE are scaled with multiple scaling factors to obtain a second CIRE. For point-wise LMMSE scaling, the energy of each channel tap is estimated. The noise energy for the channel taps is also estimated, e.g., based on energies of channel taps on one or both edges of the first CIRE. Each channel tap is scaled based on a scaling factor determined by the energy of that channel tap and the noise energy. Each channel tap with energy below a threshold may be set to zero. In another aspect, the second CIRE is obtained by zeroing out selected ones of the channel taps in the first CIRE.

    摘要翻译： 描述了用于导出具有改进的质量的信道脉冲响应估计（CIRE）的技术。 基于（1）从接收到的导频导出的初始CIRE或（2）从初始CIRE导出的滤波CIRE，获得具有多信道抽头的第一CIRE。 在一个方面，第一CIRE中的信道抽头被多个缩放因子缩放以获得第二CIRE。 对于逐点LMMSE缩放，估计每个通道抽头的能量。 也可以例如基于第一CIRE的一个或两个边缘上的信道抽头的能量来估计信道抽头的噪声能量。 每个通道抽头基于由该通道抽头的能量和噪声能量确定的缩放因子进行缩放。 能量低于阈值的每个通道抽头可以设置为零。 在另一方面，第二CIRE是通过对第一CIRE中的选通的信道抽头进行归零而获得的。

    Frequency scan for CDMA acquisition
    7.
    发明授权
    Frequency scan for CDMA acquisition 有权
    CDMA采集频率扫描

    公开(公告)号：US07593367B2

    公开(公告)日：2009-09-22

    申请号：US10173209

    申请日：2002-06-14

    申请人： Messay Amerga ,  Vikas Nagpal ,  Wen Jing New ,  Subramanya P. Rao ,  Parvathanathan Subrahmanya ,  Bhupesh Manoharlal Umatt

    发明人： Messay Amerga ,  Vikas Nagpal ,  Wen Jing New ,  Subramanya P. Rao ,  Parvathanathan Subrahmanya ,  Bhupesh Manoharlal Umatt

    IPC分类号： H04Q7/00 ,  H04B7/216

    CPC分类号： H04W48/16 ,  H04B1/707 ,  H04B1/70735 ,  H04B17/27 ,  H04B17/318 ,  H04B17/382 ,  H04L2027/0034 ,  H04W24/00 ,  H04W52/0245 ,  Y02D70/1222 ,  Y02D70/40

    摘要： Techniques for reducing the time required for frequency scan in acquisition are disclosed. In one aspect, received power measurements are made at one or more of the possible carrier frequencies and system search is performed on one or more of those frequencies when the power measurement exceeds a threshold. In another aspect, the power is measured at one or more frequencies in a band of frequencies surrounding a frequency at which the measured power exceeded a threshold. If the measured power at one or more of the frequencies in the band exceeds a second threshold, a system search is performed at one or more of those frequencies. In yet another aspect, frequencies meeting certain criteria are sorted in order of measured power prior to system search or further power measurement, and subsequent processing is performed in order of descending measured power. Various other aspects are also presented. These aspects have the benefit of reducing acquisition time, which results in faster system access and allows for more efficient use of system resources.

    摘要翻译： 公开了减少采集​​中频率扫描所需时间的技术。 在一个方面，在一个或多个可能的载波频率进行接收功率测量，并且当功率测量超过阈值时，对这些频率中的一个或多个进行系统搜索。 在另一方面，在测量功率超过阈值的频率周围的频率带中的一个或多个频率处测量功率。 如果频带中的一个或多个频率处的测量功率超过第二阈值，则在这些频率中的一个或多个频率处执行系统搜索。 在另一方面，满足某些标准的频率在系统搜索或进一步功率测量之前按照测量的功率的顺序进行分类，并且随后的处理按照下降的测量功率的顺序执行。 还提出了各种其他方面。 这些方面具有减少采集时间的优点，这导致更快的系统访问并且允许更有效地使用系统资源。