公开(公告)号：US20090316842A1

公开(公告)日：2009-12-24

申请号：US12145322

申请日：2008-06-24

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

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

IPC: H04B1/10

CPC classification number: H04W52/245 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/241 ,  H04W52/243

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.

Abstract translation: 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。

公开(公告)号：US07593367B2

公开(公告)日：2009-09-22

申请号：US10173209

申请日：2002-06-14

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

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

IPC: H04Q7/00 ,  H04B7/216

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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07433321B2

公开(公告)日：2008-10-07

申请号：US10414578

申请日：2003-04-15

Applicant: Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

Inventor： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

IPC: H04J3/06

CPC classification number: H04W56/002 ,  H04B7/2668 ,  H04B2201/70702 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

Abstract translation: 将来自多个基站的传输时间对齐到终端的方案。 为了实现时间对准，确定在终端观察到的来自基站的传输的到达时间之间的差异，并将其提供给系统，并用于调整基站处的定时，使得终端专用无线帧到达 终端在特定的时间窗口内。 在一个方案中，两个基站之间的时差被划分为帧级时间差和码片级时间差。 无论何时请求执行和报告时差测量，终端测量每个候选基站相对于参考基站的芯片级定时。 此外，终端还测量帧级定时，并且仅在需要时在时差测量中包括该信息。 否则，终端将帧级部分设置为预定值（例如，零）。

公开(公告)号：US20080233995A1

公开(公告)日：2008-09-25

申请号：US12111092

申请日：2008-04-28

Applicant: Da-shan Shiu ,  Serge Willenegger ,  Richard Chi ,  Parvathanathan Subrahmanya ,  Chih-Ping Hsu

Inventor： Da-shan Shiu ,  Serge Willenegger ,  Richard Chi ,  Parvathanathan Subrahmanya ,  Chih-Ping Hsu

IPC: H04B7/00

CPC classification number: H04W52/12 ,  H04W52/20 ,  H04W52/267 ,  H04W52/283 ,  H04W52/286 ,  H04W52/44

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.

Abstract translation: 用于更有效地控制使用多种格式（例如，速率，传输格式）的数据传输的发射功率的技术。 给定数据信道（例如，传输信道）的不同格式可能需要不同的目标SNIR来实现特定的BLER。 在一个方面，可以为每个数据信道的每个格式指定单个目标BLER。 在另一方面，提供各种功率控制方案以实现用于不同格式的不同目标SNIR。 在第一功率控制方案中，为多种格式维护多个单独的外环。 对于每个格式，其关联的外部循环尝试设置目标SNIR，使得为该格式指定的目标BLER被实现。 在第二功率控制方案中，保持多个单独的外环，并且基站进一步对不同格式的发射功率电平进行不同的调整。

公开(公告)号：US07251467B2

公开(公告)日：2007-07-31

申请号：US10684771

申请日：2003-10-14

Applicant: Andrew Sendonaris ,  Da-shan Shiu ,  Dominic Gerard Farmer ,  Jeremy H. Lin ,  Parvathanathan Subrahmanya ,  Thomas K. Rowland

Inventor： Andrew Sendonaris ,  Da-shan Shiu ,  Dominic Gerard Farmer ,  Jeremy H. Lin ,  Parvathanathan Subrahmanya ,  Thomas K. Rowland

IPC: H04B1/06 ,  H04L7/04

CPC classification number: H04L27/0014 ,  G01S19/235 ,  H04B1/3805 ,  H04L2027/0077

Abstract: Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency error in the information signal; and periodically tune the reference signal to reduce the frequency error.

Abstract translation: 公开了与无线通信有关的系统和技术。 这些系统和技术涉及无线通信，其中设备可以被配置为使用参考信号从载波恢复信息信号，检测信息信号中的频率误差; 并定期调谐参考信号以减少频率误差。

公开(公告)号：US08848549B2

公开(公告)日：2014-09-30

申请号：US12552206

申请日：2009-09-01

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

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

IPC: H04L12/26

CPC classification number: H04W28/0236 ,  H04L1/0026 ,  H04L1/203 ,  H04W28/0205

Abstract: A method for optimizing throughput in a wireless communication system is disclosed. A target metric is estimated based on previous acknowledgment data. A channel quality indicator offset is determined based on the target metric. A channel quality indicator is adjusted based on the channel quality indicator offset. The channel quality indicator indicates the quality of a wireless transmission channel.

Abstract translation: 公开了一种用于优化无线通信系统中的吞吐量的方法。 基于先前的确认数据来估计目标度量。 基于目标度量确定信道质量指示符偏移量。 基于信道质量指示符偏移量调整信道质量指示符。 信道质量指示符表示无线传输信道的质量。

公开(公告)号：US08718210B2

公开(公告)日：2014-05-06

申请号：US13237868

申请日：2011-09-20

Applicant: Mariam Motamed ,  Alexei Yurievitch Gorokhov ,  Mike L. Mccloud ,  Parvathanathan Subrahmanya

Inventor： Mariam Motamed ,  Alexei Yurievitch Gorokhov ,  Mike L. Mccloud ,  Parvathanathan Subrahmanya

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC classification number: H04L5/0051 ,  H04L25/0212 ,  H04L25/0224

Abstract: Estimating a channel impulse response (CIR) for a wireless transmission, for example a multimedia broadcast multicast services single frequency network (MBSFN) transmission, may be performed by a receiver of an wireless subframe, without requiring operational memory in excess of what is needed for CIR estimation of unicast signaling, while providing enhanced delay spread coverage. The wireless subframe may be a MBSFN subframe. The receiver may form an aggregate vector of pilot tones extracted from an OFDM reference symbol of an wireless subframe. The receiver may subsample the aggregate vector to obtain a plurality of sub-vectors each comprising a distinct subsampling phase. The receiver may process the plurality of sub-vectors using an inverse fast Fourier transform to obtain time domain representations of each of the sub-vectors. The receiver may combine the time domain representations in various ways to obtain a CIR estimate for the wireless subframe.

Abstract translation: 估计用于无线传输的信道脉冲响应（CIR），例如多媒体广播多播服务单频网（MBSFN）传输，可以由无线子帧的接收机执行，而不需要超过所需的操作存储器 CIR估计单播信令，同时提供增强的延迟扩展覆盖。 无线子帧可以是MBSFN子帧。 接收机可以形成从无线子帧的OFDM参考符号提取的导频音的聚合向量。 接收机可以对聚合向量进行子采样以获得每个包括不同子采样相位的多个子向量。 接收机可以使用快速傅里叶逆变换处理多个子向量，以获得每个子向量的时域表示。 接收机可以以各种方式组合时域表示以获得无线子帧的CIR估计。

公开(公告)号：US08687604B2

公开(公告)日：2014-04-01

申请号：US12404203

申请日：2009-03-13

Applicant: An-Swol Clement Hu ,  Jittra Jootar ,  Parvathanathan Subrahmanya

Inventor： An-Swol Clement Hu ,  Jittra Jootar ,  Parvathanathan Subrahmanya

IPC: H04J3/00

CPC classification number: H04B1/7083 ,  H04B1/70735

Abstract: A method and apparatus for improved initial cell acquisition with reduced frequency error impact. The method determines the slot timing of a transmission, identifies the primary scrambling code and frame timing using the common pilot channel, and provides a path profile using a pseudorandom noise (PN) search. An apparatus using a cell searcher that performs the method is also described.

Abstract translation: 一种用于改善初始细胞获取并减少频率误差影响的方法和装置。 该方法确定传输的时隙定时，使用公共导频信道识别主扰码和帧定时，并且使用伪随机噪声（PN）搜索来提供路径简档。 还描述了使用执行该方法的小区搜索器的装置。

公开(公告)号：US08645732B2

公开(公告)日：2014-02-04

申请号：US13013381

申请日：2011-01-25

Applicant: Vidyut M. Naware ,  Ketan N. Patel ,  Eugene T. Sy ,  Parvathanathan Subrahmanya

Inventor： Vidyut M. Naware ,  Ketan N. Patel ,  Eugene T. Sy ,  Parvathanathan Subrahmanya

IPC: G06F1/32 ,  G06F1/00

CPC classification number: H04W52/0229 ,  H04W52/0238 ,  H04W52/0274 ,  H04W52/029 ,  H04W88/02 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/126 ,  Y02D70/23

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08565775B2

公开(公告)日：2013-10-22

申请号：US12146232

申请日：2008-06-25

Applicant: Qiang Shen ,  Nathan Yee ,  Parvathanathan Subrahmanya

Inventor： Qiang Shen ,  Nathan Yee ,  Parvathanathan Subrahmanya

IPC: H04W72/00 ,  H04J11/00 ,  H04B7/14 ,  H04L12/413

CPC classification number: H04B1/7107 ,  H04B1/70735 ,  H04B1/71072 ,  H04B2201/70701

Abstract: A mobile station that is configured to perform common channel cancellation may include a parameter estimation unit that is configured to estimate parameters for generating a common channel error. The mobile station may also include a common channel generation unit that is configured to generate the common channel error based on the parameters. The mobile station may also include an adder that is configured to subtract the common channel error from received data samples.

Abstract translation: 被配置为执行公共信道消除的移动站可以包括被配置为估计用于生成公共信道错误的参数的参数估计单元。 移动台还可以包括公共信道生成单元，其被配置为基于参数生成公共信道错误。 移动站还可以包括被配置为从接收的数据样本中减去公共信道误差的加法器。