公开(公告)号：WO2010138601A2

公开(公告)日：2010-12-02

申请号：PCT/US2010/036214

申请日：2010-05-26

Applicant: QUALCOMM INCORPORATED ,  SEIBERT, Cristina A. ,  ROWITCH, Douglas Neal ,  SUBRAHMANYA, Parvathanathan ,  SHEYNBLAT, Leonid

Inventor： SEIBERT, Cristina A. ,  ROWITCH, Douglas Neal ,  SUBRAHMANYA, Parvathanathan ,  SHEYNBLAT, Leonid

IPC: H04W52/02

CPC classification number: H04W52/0254 ,  H03G3/3078 ,  H04B1/7085 ,  H04B1/7117 ,  H04L25/03019 ,  H04L2025/03566 ,  H04W48/16 ,  Y02D70/122 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/40

Abstract: Methods and apparatus are directed to mobile devices utilizing motion and/or position sensors for improving operating performance and/or power efficiency. In one example, a method for reducing power consumption in a mobile device includes receiving movement information, establishing movement data based on the movement information, determining if the mobile device is stationary using the movement data; and reducing the frequency of searching for a base station when the mobile device is stationary. In another example, a mobile device which reduces power consumption based upon movement data includes an RF front end, a receiver coupled to the RF front end, a data demodulator coupled to the receiver, a searcher, coupled to the RF front end and the receiver, which searches for base stations, and a processing unit coupled to the searcher, wherein the processing unit controls the searcher based upon the stationarity of the mobile device.

Abstract translation: 方法和装置涉及利用运动和/或位置传感器来改善操作性能和/或功率效率的移动设备。 在一个示例中，用于降低移动设备中的功耗的方法包括接收移动信息，基于移动信息建立移动数据，使用移动数据确定移动设备是否静止; 并且当移动设备静止时，降低搜索基站的频率。 在另一示例中，基于移动数据降低功耗的移动设备包括RF前端，耦合到RF前端的接收器，耦合到接收器的数据解调器，耦合到RF前端和接收器的搜索器 ，其搜索基站，以及耦合到搜索器的处理单元，其中处理单元基于移动设备的平稳度来控制搜索者。

公开(公告)号：WO2010028351A3

公开(公告)日：2010-03-11

申请号：PCT/US2009/056206

申请日：2009-09-08

Applicant: QUALCOMM Incorporated ,  CUI, Tao ,  LU, Feng ,  SETHURAMAN, Vignesh ,  RAO, Subramanya P. ,  SUBRAHMANYA, Parvathanathan ,  GOTETI, Anil Kumar

Inventor： CUI, Tao ,  LU, Feng ,  SETHURAMAN, Vignesh ,  RAO, Subramanya P. ,  SUBRAHMANYA, Parvathanathan ,  GOTETI, Anil Kumar

IPC: H04L1/00

Abstract: 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.

公开(公告)号：WO2010008830A3

公开(公告)日：2010-01-21

申请号：PCT/US2009/048263

申请日：2009-06-23

Applicant: QUALCOMM INCORPORATED ,  LU, Feng ,  SRIPATHI, Prashant, Udupa ,  ZHAO, Liang ,  SUBRAHMANYA, Parvathanathan ,  RAO, Subramanya, P.

Inventor： LU, Feng ,  SRIPATHI, Prashant, Udupa ,  ZHAO, Liang ,  SUBRAHMANYA, Parvathanathan ,  RAO, Subramanya, P.

IPC: H04L1/20

Abstract: 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.

公开(公告)号：WO2009023597A2

公开(公告)日：2009-02-19

申请号：PCT/US2008/072701

申请日：2008-08-08

Applicant: QUALCOMM Incorporated ,  LI, Yan ,  SUBRAHMANYA, Parvathanathan ,  ZAMAN, Naveed

Inventor： LI, Yan ,  SUBRAHMANYA, Parvathanathan ,  ZAMAN, Naveed

IPC: H04B1/707

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/709

Abstract: A circuit and algorithm are disclosed for a step2 search of a three step search of synchronization channels in a W-CDMA system. A mobile terminal of the CDMA system includes an RF downconverter for receiving I and Q signals. A searcher, responsive to the I and Q signals, includes a first correlator for correlating the I and Q signals with a primary synchronization code on a primary synchronization channel, and a second correlator for correlating I and Q signals with a secondary synchronization code on a secondary synchronization channel. The correlated I and Q signals are added for each of the secondary synchronization codes. An energy calculator and a maximum energy detector use the correlated I and Q signals of both the primary and secondary synchronization channels to detect the most likely scrambling code group of secondary synchronization codes.

Abstract translation: 针对W-CDMA系统中的同步信道的三步搜索的步骤2搜索公开了一种电路和算法。 CDMA系统的移动终端包括用于接收I和Q信号的RF下变频器。 响应于I和Q信号的搜索器包括第一相关器和第二相关器，第一相关器用于将I和Q信号与主同步信道上的主同步码相关，第二相关器用于将I和Q信号与辅助同步码 辅助同步信道。 为每个辅助同步码添加相关的I和Q信号。 能量计算器和最大能量检测器使用主同步信道和辅助同步信道的相关I和Q信号来检测辅助同步码的最可能的扰码组。

公开(公告)号：WO2007035550A1

公开(公告)日：2007-03-29

申请号：PCT/US2006/036137

申请日：2006-09-15

Applicant: QUALCOMM INCORPORATED ,  SUBRAHMANYA, Parvathanathan ,  KANG, Inyup ,  FEI, Jia ,  SUNDARESAN, Rajesh

Inventor： SUBRAHMANYA, Parvathanathan ,  KANG, Inyup ,  FEI, Jia ,  SUNDARESAN, Rajesh

IPC: H04B1/707 ,  H04B7/08 ,  H04L25/03

CPC classification number: H04B1/71057 ,  H04B7/0669 ,  H04B7/0673 ,  H04B7/0845 ,  H04L25/03044 ,  H04L25/03292 ,  H04L2025/03509

Abstract: This disclosure describes equalization techniques for spread spectrum wireless communication. The techniques may involve estimating a channel impulse response, estimating channel variance, and selecting filter coefficients for an equalizer based on the estimated channel impulse response and the estimated channel variance. Moreover, in accordance with this disclosure, the channel variance estimation involves estimation of two or more co-variances for different received samples. Importantly, the equalizer is "fractionally spaced" which means that the equalizer defines fractional filtering coefficients (filter taps), unlike conventional equalizers that presume that filter coefficients are defined at integer chip spacing. The techniques can allow the equalizer to account for antenna diversity, such as receive diversity, transmit diversity, or possibly both.

Abstract translation: 本公开描述了用于扩频无线通信的均衡技术。 这些技术可以包括基于所估计的信道脉冲响应和所估计的信道方差估计信道脉冲响应，估计信道方差，以及为均衡器选择滤波器系数。 此外，根据本公开，信道方差估计涉及对于不同接收样本的两个或多个协方差的估计。 重要的是，均衡器是“分数间隔”的，这意味着均衡器定义分数滤波系数（滤波器抽头），不同于传统的均衡器，假设滤波器系数是以整数芯片间隔定义的。 这些技术可以允许均衡器考虑天线分集，例如接收分集，发射分集，或者可能两者。

公开(公告)号：WO2005067168A1

公开(公告)日：2005-07-21

申请号：PCT/US2004/043970

申请日：2004-12-29

Applicant: QUALCOMM INCORPORATED ,  HSU, Chih-Ping ,  SUBRAHMANYA, Parvathanathan ,  SHIU, Da-shan ,  OH, Hyukjun ,  RIDDLE, Christopher, C. ,  KASTURI, Nitin

Inventor： HSU, Chih-Ping ,  SUBRAHMANYA, Parvathanathan ,  SHIU, Da-shan ,  OH, Hyukjun ,  RIDDLE, Christopher, C. ,  KASTURI, Nitin

IPC: H04B7/005

CPC classification number: H04W52/12 ,  H04W52/34 ,  H04W52/36

Abstract: Techniques are provided to control the transmit power for data transmission on multiple transport channels having different signal quality (SIR) targets. A single SIR target is maintained for all transport channels, and this SIR target is adjusted based only on active transport channels. For each update interval, a data processor processes at least one data block received in the current update interval on at least one of the transport channels and provides the status of each received data block. A controller increases the SIR target based on an up step if any received data block is erased and decreases the SIR target based on a down step if all received data blocks are good. If any received data block is erased, the down step used to adjust the SIR target may be set to the smallest down step size required by all transport channels with erased data blocks.

Abstract translation: 提供技术来控制具有不同信号质量（SIR）目标的多个传输信道上的数据传输的发射功率。 对于所有传输信道维持单个SIR目标，并且该SIR目标仅基于主动传输信道进行调整。 对于每个更新间隔，数据处理器处理在当前更新间隔中在至少一个传输信道上接收的至少一个数据块，并提供每个接收到的数据块的状态。 如果任何接收到的数据块被擦除，则控制器基于上升步骤增加SIR目标，并且如果所有接收到的数据块都良好，则基于下降步骤降低SIR目标。 如果任何接收到的数据块被擦除，用于调整SIR目标的下降步骤可以被设置为具有被擦除的数据块的所有传输信道所需的最小的下降步长。

公开(公告)号：WO2004054130A2

公开(公告)日：2004-06-24

申请号：PCT/US2003/038807

申请日：2003-12-04

Applicant: QUALCOMM, INCORPORATED

Inventor： OH, Hyukjun ,  BLESSENT, Luca ,  HSU, Chih-Ping ,  SHIU, Da-shan ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

IPC: H04B7/005

CPC classification number: H04W52/362 ,  H04W52/12 ,  H04W52/143 ,  H04W52/24 ,  H04W52/367

Abstract: Techniques to quickly adjust an SIR target toward a final value needed to achieve a specified target BLER for a data transmission. The outer loop may be implemented with multiple modes. The SIR target may be maintained fixed in a hold mode, adjusted in large down steps to speed up convergence in an acquisition mode, and adjusted by a small down step and a large up step for good and erased blocks, respectively, in a tracking mode. Various schemes may be used to adjust the SIR target by larger down steps in the acquisition mode. These schemes may be used even if data is transmitted intermittently, the target BLER is set to a low value, and/or one or multiple transport channels are used for data transmission. The SIR target may be boosted by a particular amount upon transitioning from the acquisition mode to the tracking mode.

Abstract translation: 快速调整SIR目标朝向实现数据传输的指定目标BLER所需的最终值的技术。 外环可以用多种模式实现。 SIR目标可以保持固定在保持模式下，以较大的向下步骤进行调整以加速采集模式中的收敛，并且在追踪模式下分别通过较小的下一步和较大的上升步骤对良好块和擦除块进行调整 。 可以使用各种方案通过采集模式中较大的下降步骤来调整SIR目标。 即使数据间歇地传输，目标BLER被设置为低值，并且/或者一个或多个传输信道被用于数据传输，也可以使用这些方案。 在从采集模式转换到跟踪模式时，SIR目标可以被增加特定量。

公开(公告)号：WO2004023672A2

公开(公告)日：2004-03-18

申请号：PCT/US2003/028108

申请日：2003-09-05

Applicant: QUALCOMM, INCORPORATED

Inventor： SUBRAHMANYA, Parvathanathan

IPC: H04B1/76

CPC classification number: H04L25/0214 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0228

Abstract: A method and apparatus are provided for adapting a pilot filter based on the velocity of a wireless communication device (WCD) in relation to a wireless network infrastructure. The pilot filter is adapted by determining pilot coefficients for the pilot filter based on the WCD velocity. The pilot filter may be located in the WCD, or in the network infrastructure, or in both.

Abstract translation: 提供了一种用于根据无线通信设备（WCD）相对于无线网络基础设施的速度来适配导频滤波器的方法和装置。 通过基于WCD速度确定导频滤波器的导频系数来适配导频滤波器。 导频滤波器可以位于WCD中，或者位于网络基础设施中，或两者中。

公开(公告)号：WO2004001988A3

公开(公告)日：2003-12-31

申请号：PCT/US2003/019937

申请日：2003-06-25

Applicant: QUALCOMM INCORPORATED

Inventor： SUBRAHMANYA, Parvathanathan

IPC: G08C25/00

Abstract: Methods and apparatus for reducing latency for communication error recovery includes recognizing that an incoming message is due, and requesting retransmission if that message is not properly received. A message is transmitted as two message portions, the first message portion transmitted at a first power level (220), and the second message portion, which is associated with the first message portion, transmitted at a second lower power level (230). The first power level is chosen to provide a predetermined probability that the first message portion will be successfully received. Alternatively, the first and second message portions are transmitted such that the first message portion has a greater energy per bit than does the second message portion. At a first time, the first message portion is received. At a second time, wherein the second time has a known relationship to the first time, a signal is received from which the second message portion is not reliably obtained. The receiving device recognizes that the second message portion was not properly received and requests retransmission of at least the second message portion.

公开(公告)号：WO2003017527A3

公开(公告)日：2003-02-27

申请号：PCT/US2002/026449

申请日：2002-08-20

Applicant: QUALCOMM INCORPORATED

Inventor： SHIU, Da-shan ,  WILLENEGGER, Serge ,  CHI, Richard ,  SUBRAHMANYA, Parvathanathan ,  HSU, Chih-Ping

IPC: H04B7/005

Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.