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1. 发明申请

WO2012075454A1 METHOD AND APPARATUS FOR DATA AIDED CHANNEL QUALITY ESTIMATION 审中-公开
标题翻译：数据辅助信道质量估计的方法和装置
公开(公告)号：WO2012075454A1
公开(公告)日：2012-06-07
申请号：PCT/US2011/063171
申请日：2011-12-02
申请人： QUALCOMM INCORPORATED , CHO, Young Geun , DUA, Aditya , LU, Feng , MERGEN, Gokhan , RAO, Subramanya P.N. , GUPTA, Abhinav , SUBRAHMANYA,, Parvathanathan
发明人： CHO, Young Geun , DUA, Aditya , LU, Feng , MERGEN, Gokhan , RAO, Subramanya P.N. , GUPTA, Abhinav , SUBRAHMANYA,, Parvathanathan
IPC分类号： H04L1/20
CPC分类号： H04L1/20
摘要： Methods and apparatuses for data aided channel quality estimation using both pilot and data information are disclosed herein. In one exemplary aspect, a method for estimating channel quality in a wireless communication system is disclosed. The method comprises estimating a pilot noise variance based on a pilot signal received from a base station on a downlink and estimating a data noise variance based on a data signal received from the base station on the downlink. The method also comprises combining the pilot noise variance and the data noise variance to obtain a combined noise variance, and estimating the channel quality based on the combined noise variance.
摘要翻译：本文公开了使用导频和数据信息的数据辅助信道质量估计的方法和装置。在一个示例性方面，公开了一种用于估计无线通信系统中的信道质量的方法。该方法包括基于从下行链路上的基站接收的导频信号来估计导频噪声方差，并且基于在下行链路上从基站接收的数据信号来估计数据噪声方差。该方法还包括组合导频噪声方差和数据噪声方差以获得组合噪声方差，并且基于组合的噪声方差来估计信道质量。

2. 发明申请

WO2010008830A2 PHASE-NOISE RESILIENT GENERATION OF A CHANNEL QUALITY INDICATOR 审中-公开
标题翻译：通道质量指标的相位噪声生成
公开(公告)号：WO2010008830A2
公开(公告)日：2010-01-21
申请号：PCT/US2009048263
申请日：2009-06-23
申请人： QUALCOMM INC , LU FENG , SRIPATHI PRASHANT UDUPA , ZHAO LIANG , SUBRAHMANYA PARVATHANATHAN , RAO SUBRAMANYA P
发明人： LU FENG , SRIPATHI PRASHANT UDUPA , ZHAO LIANG , SUBRAHMANYA PARVATHANATHAN , RAO SUBRAMANYA P
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。

3. 发明申请

WO2010002991A1 LOW POWER MODES FOR FEMTO CELLS 审中-公开
标题翻译：低功率模式用于有限元细胞
公开(公告)号：WO2010002991A1
公开(公告)日：2010-01-07
申请号：PCT/US2009/049404
申请日：2009-07-01
申请人： QUALCOMM INCORPORATED , SUBRAHMANYA, Parvathanathan
发明人： SUBRAHMANYA, Parvathanathan
IPC分类号： H04W52/02
CPC分类号： H04W88/08 , H04W52/0206 , H04W52/244 , H04W52/287 , H04W52/322 , H04W52/325 , H04W84/045 , Y02D70/1222 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/146 , Y02D70/164 , Y02D70/23
摘要： Devices and methods are provided for deploying and/or implementing a low power mode in an access point (AP) base station. The low power mode may be implemented based on the presence and/or status of access terminals (ATs). In one embodiment, the method may involve determining whether any ATs are present within at least one defined coverage area. In another embodiment, the method may involve determining whether the ATs are in an idle or active state.
摘要翻译：提供了用于在接入点（AP）基站中部署和/或实现低功率模式的设备和方法。低功率模式可以基于接入终端（AT）的存在和/或状态来实现。在一个实施例中，该方法可以包括确定在至少一个定义的覆盖区域内是否存在任何AT。在另一个实施例中，该方法可以涉及确定AT是处于空闲还是活动状态。

4. 发明申请

WO2007059522A1 METHOD AND APPARATUS FOR FILTERING NOISY ESTIMATES TO REDUCE ESTIMATION ERRORS 审中-公开
标题翻译：用于滤除噪声估计以减少估计误差的方法和装置
公开(公告)号：WO2007059522A1
公开(公告)日：2007-05-24
申请号：PCT/US2006/060952
申请日：2006-11-15
申请人： QUALCOMM Incorporated , MERGEN, Gokhan , SUBRAHMANYA, Parvathanathan , ALILAGHATTA-KANTHARAJ, Vijayaraj , KASTURI, Nitin
发明人： MERGEN, Gokhan , SUBRAHMANYA, Parvathanathan , ALILAGHATTA-KANTHARAJ, Vijayaraj , KASTURI, Nitin
IPC分类号： H04L25/02 , H04L25/03
CPC分类号： H04L25/025 , H04B17/3913 , H04B2201/70701 , H04L25/0212 , H04L25/0228 , H04L25/03038
摘要： Techniques for filtering noisy estimates to reduce estimation errors are described. A sequence of input values (e.g., for an initial channel impulse response estimate (CIRE)) is filtered with an infinite impulse response (IIR) filter having at least one coefficient to obtain a sequence of output values (e.g., for a filtered CIRE). The coefficient(s) are updated based on the sequence of input values with an adaptive filter, a bank of prediction filters, or a normalized variation technique. To update the coefficient(s) with the adaptive filter, a sequence of predicted values is derived based on the sequence of input values. Prediction errors between the sequence of predicted values and the sequence of input values are determined and filtered to obtain filtered prediction errors. The coefficient(s) of the IIR filter are then updated based on the prediction errors and the filtered prediction errors.
摘要翻译：描述了用于过滤噪声估计以减少估计误差的技术。输入值的序列（例如，对于初始信道脉冲响应估计（CIRE））用具有至少一个系数的无限脉冲响应（IIR）滤波器进行滤波以获得输出值序列（例如，对于滤波后的CIRE）。基于具有自适应滤波器，预测滤波器组或归一化变化技术的输入值的序列来更新系数。为了用自适应滤波器更新系数，基于输入值的序列导出预测值序列。确定并过滤预测值序列与输入值序列之间的预测误差，以获得滤波预测误差。然后基于预测误差和滤波预测误差来更新IIR滤波器的系数。

5. 发明申请

WO2007059517A2 EQUALIZER FOR A RECEIVER IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：用于无线通信系统中接收机的均衡器
公开(公告)号：WO2007059517A2
公开(公告)日：2007-05-24
申请号：PCT/US2006060947
申请日：2006-11-15
申请人： QUALCOMM INC , MERGEN GOKHAN , SUBRAHMANYA PARVATHANATHAN , KASTURI NITIN , SUNDARESAN RAJESH
发明人： MERGEN GOKHAN , SUBRAHMANYA PARVATHANATHAN , KASTURI NITIN , SUNDARESAN RAJESH
CPC分类号： H04B7/0634 , H04B7/0848 , H04L7/0058 , H04L25/03044
摘要： Techniques for performing equalization at a receiver are described. In an aspect, equalization is performed by sub-sampling an over-sampled input signal to obtain multiple sub-sampled signals. An over-sampled channel impulse response estimate is derived and sub-sampled to obtain multiple sub-sampled channel impulse response estimates. At least one set of equalizer coefficients is derived based on at least one sub-sampled channel impulse response estimate. At least one sub-sampled signal is filtered with the at least one set of equalizer coefficients to obtain at least one output signal. One sub-sampled signal (e.g., with largest energy) may be selected and equalized based on a set of equalizer coefficients derived from an associated sub-sampled channel impulse response estimate. Alternatively, the multiple sub-sampled signals may be equalized based on multiple sets of equalizer coefficients, which may be derived separately or jointly. The equalizer coefficients may be derived in the time domain or frequency domain.
摘要翻译：描述用于在接收机处执行均衡的技术。在一方面，通过对过采样输入信号进行子采样来执行均衡以获得多个子采样信号。导出过采样信道脉冲响应估计并进行子采样以获得多个子采样信道脉冲响应估计。基于至少一个子采样信道脉冲响应估计导出至少一组均衡器系数。用至少一组均衡器系数对至少一个子采样信号进行滤波以获得至少一个输出信号。可以基于从相关联的子采样信道脉冲响应估计导出的一组均衡器系数来选择和均衡一个子采样信号（例如，具有最大能量）。或者，可以基于可以单独或联合导出的多组均衡器系数来均衡多个子采样信号。均衡器系数可以在时域或频域中导出。

6. 发明申请

WO2004073207A1 WEIGHT PREDICTION FOR CLOSED-LOOP TRANSMIT DIVERSITY 审中-公开
标题翻译：闭环传输重力的重量预测
公开(公告)号：WO2004073207A1
公开(公告)日：2004-08-26
申请号：PCT/US2004/003903
申请日：2004-02-09
申请人： QUALCOMM INCORPORATED , JOOTAR, Jittra , SHIU, Da-shan , SUBRAHMANYA, Parvathanathan
发明人： JOOTAR, Jittra , SHIU, Da-shan , SUBRAHMANYA, Parvathanathan
IPC分类号： H04B7/06
CPC分类号： H04B7/0634
摘要： Techniques for predicting weights used for closed-loop transmit diversity. In a channel prediction scheme, channel gains for multiple transmit antennas are initially estimated (e.g., based on pilots received from these antennas) and used to derive predicted channel gains for a future time instant. The predicted channel gains are then used to derive predicted weights that are deemed to be "optimal" at the future time instant. Optimality may be determined based on one or more criteria, such as maximizing a received SNR for the received signals. In a weight prediction scheme, the channel gains for the multiple antennas are estimated and used to compute optimal weights for the current time instant. The current optimal weights are then used to predict the optimal weights at the future time instant. For both schemes, the prediction may be performed based on an adaptive filter (e.g., LMS or RLS filter) or a non-adaptive filter.
摘要翻译：用于预测用于闭环发射分集的权重的技术。在信道预测方案中，最初估计多个发射天线的信道增益（例如，基于从这些天线接收的导频），并用于在未来时刻导出预测的信道增益。然后，预测的信道增益用于导出在未来时刻被认为是“最佳”的预测权重。可以基于一个或多个准则来确定最优性，例如为接收到的信号最大化接收到的SNR。在权重预测方案中，估计多个天线的信道增益并用于计算当前时刻的最优权重。然后使用当前的最优权重来预测未来时刻的最优权重。对于这两种方案，可以基于自适应滤波器（例如，LMS或RLS滤波器）或非自适应滤波器来执行预测。

7. 发明申请

WO2010138601A3 MOVEMENT SENSOR USES IN COMMUNICATION SYSTEMS 审中-公开
标题翻译：运动传感器在通信系统中的应用
公开(公告)号：WO2010138601A3
公开(公告)日：2011-04-14
申请号：PCT/US2010036214
申请日：2010-05-26
申请人： QUALCOMM INC , SEIBERT CRISTINA A , ROWITCH DOUGLAS NEAL , SUBRAHMANYA PARVATHANATHAN , SHEYNBLAT LEONID
发明人： SEIBERT CRISTINA A , ROWITCH DOUGLAS NEAL , SUBRAHMANYA PARVATHANATHAN , SHEYNBLAT LEONID
IPC分类号： H04W52/02 , H03G3/30 , H04B1/707 , H04L25/03
CPC分类号： H04W52/0254 , H03G3/3078 , H04B1/7085 , H04B1/7117 , H04L25/03019 , H04L2025/03566 , H04W48/16 , Y02D70/00 , Y02D70/12 , Y02D70/122 , Y02D70/142 , Y02D70/144 , Y02D70/164 , Y02D70/40
摘要： 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.
摘要翻译：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性来控制搜索者。

8. 发明申请

WO2010148311A1 APPARATUS AND METHODS FOR LOW POWER SENSING OF WIRELESS ACCESS TECHNOLOGIES 审中-公开
标题翻译：无线接入技术低功率感测装置及方法
公开(公告)号：WO2010148311A1
公开(公告)日：2010-12-23
申请号：PCT/US2010/039182
申请日：2010-06-18
申请人： QUALCOMM INCORPORATED , KRISHNASWAMY, Dilip , KANADE, Parag Mohan , SUBRAHMANYA, Parvathanathan
发明人： KRISHNASWAMY, Dilip , KANADE, Parag Mohan , SUBRAHMANYA, Parvathanathan
IPC分类号： H04W52/02 , H04W48/16 , H04W48/18
CPC分类号： H04W52/028 , H04W48/16 , H04W48/18 , H04W52/0229 , H04W88/06 , Y02D70/122 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146
摘要： Apparatus and methods for low power sensing of wireless access technologies are disclosed. In particular, a mobile wireless device, such as an access terminal, may utilize a lower power circuitry portion that operates at a lower power than active circuitry, such as a primary transceiver. The lower power circuitry portion includes a configurable searcher that is capable of sensing if signals of one or more various wireless access technologies are present. When the wireless device utilizes sleep or idle modes for power savings, use of the lower power sensing circuitry to sense the presence of wireless access technologies, rather than using an awoken higher power primary transceiver for sensing, affords increased power savings. An added ability of the lower power circuitry to be put into sleep or idles modes achieves even greater power savings.
摘要翻译：公开了用于无线接入技术的低功率感测的装置和方法。具体地，诸如接入终端的移动无线设备可以利用比诸如主收发器的有源电路低的功率操作的较低功率电路部分。较低功率电路部分包括能够感测是否存在一种或多种各种无线接入技术的信号的可配置搜索器。当无线设备利用睡眠或空闲模式进行功率节省时，使用低功率感测电路来感测无线接入技术的存在，而不是使用唤醒的较高功率的主收发器来进行感测，从而提供更大的功率节省。低功率电路进入睡眠或空闲模式的附加功能实现了更大的功率节省。

9. 发明申请

WO2009023597A3 SEARCHER FOR MULTIPLE ORTHOGONAL CHANNELS WITH KNOWN DATA - WCDMA STEP2 SEARCH 审中-公开
标题翻译：具有已知数据的多个正交通道的搜索器 - WCDMA STEP2搜索
公开(公告)号：WO2009023597A3
公开(公告)日：2009-04-16
申请号：PCT/US2008072701
申请日：2008-08-08
申请人： QUALCOMM INC , LI YAN , SUBRAHMANYA PARVATHANATHAN , ZAMAN NAVEED
发明人： LI YAN , SUBRAHMANYA PARVATHANATHAN , ZAMAN NAVEED
IPC分类号： H04B1/707
CPC分类号： H04B1/7083 , H04B1/70735 , H04B1/709
摘要： 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.
摘要翻译：公开了一种针对W-CDMA系统中的同步信道的三步搜索的步骤2搜索的电路和算法。 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信号的搜索器包括用于将I信号与Q信号与主同步信道上的主同步码进行相关的第一相关器，以及用于使I和Q信号与第一同步码相关的第二相关器，辅同步通道。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和次同步信道的相关I和Q信号来检测次同步码的最可能的扰码组。

10. 发明申请

WO2008124766A2 ADAPTIVE PILOT AND DATA SYMBOL ESTIMATION 审中-公开
标题翻译：自适应导航和数据符号估计
公开(公告)号：WO2008124766A2
公开(公告)日：2008-10-16
申请号：PCT/US2008059750
申请日：2008-04-09
申请人： QUALCOMM INC , ABRISHAMKAR FARROKH , MOTAMED MARIAM , SUBRAHMANYA PARVATHANATHAN
发明人： ABRISHAMKAR FARROKH , MOTAMED MARIAM , SUBRAHMANYA PARVATHANATHAN
IPC分类号： H04L25/02
CPC分类号： H04L25/0228
摘要： Techniques for performing adaptive channel estimation are described. A receiver derives channel estimates for a wireless channel based on received pilot symbols and at least one estimation parameter. The receiver updates the at least one estimation parameter based on the received pilot symbols. The at least one estimation parameter may be for an innovations representation model of the wireless channel and may be updated based on a cost function with costs defined by prediction errors. In one design, the receiver derives predicted pilot symbols based on the received pilot symbols and the at least one estimation parameter, determines prediction errors based on the received pilot symbols and the predicted pilot symbols, and further derives error gradients based on the prediction errors. The receiver then updates the at least one estimation parameter based on the error gradients and the prediction errors, e.g., if a stability test is satisfied.
摘要翻译：描述用于执行自适应信道估计的技术。接收机基于接收的导频符号和至少一个估计参数导出无线信道的信道估计。接收机基于接收的导频符号来更新至少一个估计参数。所述至少一个估计参数可以是针对无线信道的创新表示模型，并且可以基于具有由预测误差定义的成本的成本函数来更新。在一种设计中，接收机基于接收的导频符号和至少一个估计参数导出预测的导频符号，基于接收到的导频符号和预测的导频符号来确定预测误差，并且还基于预测误差导出误差梯度。然后，接收器基于误差梯度和预测误差来更新至少一个估计参数，例如，如果满足稳定性测试。

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