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1. 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。

2. 发明申请

WO2010028351A2 METHOD AND APPARATUS FOR PREDICTING CHANNEL QUALITY INDICATOR IN A HIGH SPEED DOWNLINK PACKET ACCESS SYSTEM 审中-公开
标题翻译：用于预测高速下行链路分组接入系统中的信道质量指示符的方法和设备
公开(公告)号：WO2010028351A2
公开(公告)日：2010-03-11
申请号：PCT/US2009056206
申请日：2009-09-08
申请人： QUALCOMM INC , CUI TAO , LU FENG , SETHURAMAN VIGNESH , RAO SUBRAMANYA P , SUBRAHMANYA PARVATHANATHAN , GOTETI ANIL KUMAR
发明人： CUI TAO , LU FENG , SETHURAMAN VIGNESH , RAO SUBRAMANYA P , SUBRAHMANYA PARVATHANATHAN , GOTETI ANIL KUMAR
IPC分类号： H04W16/04
CPC分类号： H04L1/0026
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。 CQI的准确性对于HSDPA性能至关重要。在一些HSDPA系统中，CQI可能多达三（3）个子帧陈旧。因此，为了有效地调度用于在通信信道上传输的数据，需要预测CQI值。各种实施例公开了一阶自适应IIR滤波器，其比有限脉冲响应（FIR）对应物复杂得多，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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明申请

WO2005072001A2 METHOD AND APPARATUS OPTIMIZING RECEIPT OF CALL/BROADCAST PAGING MESSAGES BY SELF-POWERED WIRELESS COMMUNICATIONS DEVICES 审中-公开
标题翻译：自动无线通信设备的呼叫/广播寻呼消息收发方法与设备
公开(公告)号：WO2005072001A2
公开(公告)日：2005-08-04
申请号：PCT/US2005000822
申请日：2005-01-11
申请人： QUALCOMM INC , SUBRAHMANYA PARVATHANATHAN
发明人： SUBRAHMANYA PARVATHANATHAN
IPC分类号： H04W4/00 , H04W52/02 , H04W68/00 , H04Q7/38
CPC分类号： H04W68/00 , H04W52/0216 , Y02D70/00
摘要： A wireless communications network (120) responds to each incoming call placed to a wireless communications device (134) by transmitting a call-paging message (418) within a corresponding partition of a digital radio frame of prescribed format. Responsive to each occurrence of a broadcast event (404), the network transmits (414) a repeating broadcast-paging message announcing the availability of broadcast content from the network. The broadcast-paging message is transmitted multiple times within each digital radio frame. Another sequence (500) describes WCD operation in this network. Responsive to wakeup (502) from sleep, the WCD detects (509) received signal quality. The WCD also receives (510) scheduled network transmission of a call-paging message and a number of instances (at least one) of a repeating network transmitted broadcast-paging message that occurs multiple times for each scheduled transmission of the call-paging message. This number varies inversely with the detected signal quality.
摘要翻译：无线通信网络（120）通过在规定格式的数字无线电帧的相应分区内发送呼叫寻呼消息（418）来响应放置到无线通信设备（134）的每个呼入。响应于广播事件的每次发生（404），网络发送（414）重播广播 - 寻呼消息，通知广播内容的可用性。在每个数字无线电帧内广播 - 寻呼消息被多次发送。另一个序列（500）描述了该网络中的WCD操作。响应唤醒（502）从睡眠，WCD检测（509）接收信号质量。 WCD还接收（510）呼叫寻呼消息的调度网络传输和针对呼叫寻呼消息的每个调度传输多次发生的重复网络发送的广播寻呼消息的多个实例（至少一个）。该数字与检测到的信号质量成反比。

8. 发明申请

WO2011103355A2 PROTOCOL STACK POWER OPTIMIZATION FOR WIRELESS COMMUNICATIONS DEVICES 审中-公开
标题翻译：无线通信设备的协议栈功率优化
公开(公告)号：WO2011103355A2
公开(公告)日：2011-08-25
申请号：PCT/US2011025330
申请日：2011-02-17
申请人： QUALCOMM INC , NAWARE VIDYUT M , PATEL KETAN N , SY EUGENE T , SUBRAHMANYA PARVATHANATHAN
发明人： NAWARE VIDYUT M , PATEL KETAN N , SY EUGENE T , SUBRAHMANYA PARVATHANATHAN
IPC分类号： H04W52/02
CPC分类号： H04W52/0229 , H04W52/0238 , H04W52/0274 , H04W52/029 , H04W88/02 , Y02D70/00 , Y02D70/1242 , Y02D70/1244 , Y02D70/126 , Y02D70/23
摘要： User experiences on wireless devices are affected by communication, computation, and user interface capabilities. Another key performance indicator of a wireless device is its battery life. A method, algorithm and apparatus for improving the communication, computation and user interface capabilities of a mobile device is disclosed, which requires the expenditure of less energy and increases battery life. The trade-off between battery life and user experience related to the communication capability is managed by a protocol stack power optimization algorithm that optimally allocates energy resources. The power management algorithm inputs and combines measurements made at various layers of the protocol stack to selectively control a set of actions impacting energy usage. The algorithm maps from a set of measurements to a set of actions that provides the best trade-off between user experience and energy consumption.
摘要翻译：无线设备的用户体验受通信，计算和用户界面功能的影响。无线设备的另一个关键性能指标是其电池寿命。公开了一种用于改善移动设备的通信，计算和用户界面能力的方法，算法和装置，其需要较少的能量消耗并延长电池寿命。电池寿命与通信能力相关的用户体验之间的权衡由最优分配能源的协议栈功率优化算法进行管理。功率管理算法输入和组合在协议栈的各个层进行的测量，以选择性地控制影响能量使用的一组动作。该算法将一组测量映射到提供用户体验和能量消耗之间最佳权衡的一组动作。

9. 发明申请

WO2007035737A2 QUICK DETECTION OF SIGNALING IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：快速检测无线通信系统中的信号
公开(公告)号：WO2007035737A2
公开(公告)日：2007-03-29
申请号：PCT/US2006036489
申请日：2006-09-15
申请人： QUALCOMM INC , SUBRAHMANYA PARVATHANATHAN , SHESHADRI THEJASWI BHARADWAJ M , CHAWLA VIVEK
发明人： SUBRAHMANYA PARVATHANATHAN , SHESHADRI THEJASWI BHARADWAJ M , CHAWLA VIVEK
IPC分类号： H04L27/227
CPC分类号： H04L27/2278 , H04B1/7085 , H04B2201/70709 , H04L2027/003 , H04L2027/0034 , H04L2027/0065 , H04W52/0229 , Y02D70/00 , Y02D70/122 , Y02D70/1242 , Y02D70/166 , Y02D70/24 , Y02D70/40
摘要： Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.
摘要翻译：使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频过滤（NCP）来检测零星发送的信令，例如寻呼指示符。对于QFT，将多个假设的频率误差应用于输入信号以获得多个旋转信号。计算旋转信号的能量。提供具有最大能量的假设频率误差作为频率误差估计。对于QTT，对输入信号执行第一组时间偏移的相干累加，例如，早，准时和迟。然后执行插值，能量计算和非相干累加以获得具有较高时间分辨率的定时误差估计。对于NCP，使用非因果滤波器对导频符号进行滤波以获得针对非STTD的一个天线和针对STTD的两个天线的导频估计。频率和定时误差估计值和导频估计值用于检测信令。

10. 发明申请

WO2011106571A2 METHODS AND APPARATUS FOR ITERATIVE DECODING IN MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于多输入多输出（MIMO）通信系统中迭代解码的方法和装置
公开(公告)号：WO2011106571A2
公开(公告)日：2011-09-01
申请号：PCT/US2011026138
申请日：2011-02-24
申请人： QUALCOMM INC , CUI TAO , TANG JIA , SENDONARIS ANDREW , SALVEKAR ATUL A , RAO SUBRAMANYA P N , SUBRAHMANYA PARVATHANATHAN , XIAO LEI , MCCLOUD MICHAEL L , BANISTER BRIAN C
发明人： CUI TAO , TANG JIA , SENDONARIS ANDREW , SALVEKAR ATUL A , RAO SUBRAMANYA P N , SUBRAHMANYA PARVATHANATHAN , XIAO LEI , MCCLOUD MICHAEL L , BANISTER BRIAN C
IPC分类号： H04L1/06
CPC分类号： H04L1/005 , H04L1/06 , H04L25/03242 , H04L25/067
摘要： Methods and apparatus for receiving, processing, and decoding MIMO transmissions in communications systems are described. A non-Gaussian approximation method for simplifying processing complexity where summations are used is described. Use of a priori information to facilitate determination of log likelihood ratios (LLRs) in receivers using iterative decoders is further described. A Gaussian or non-Gaussian approximation method using a priori information may be used to determine a K-best list of values for summation to generate an LLR is also described.
摘要翻译：描述了用于在通信系统中接收，处理和解码MIMO传输的方法和装置。描述了用于简化使用求和的处理复杂度的非高斯近似方法。进一步描述使用先验信息以便于使用迭代解码器确定接收机中的对数似然比（LLR）。也可以使用使用先验信息的高斯或非高斯近似方法来确定用于求和以产生LLR的K个最佳值列表。

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