中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

118 records (took 0.026 seconds)

    METHODS AND APPARATUS FOR COMMON CHANNEL CANCELLATION IN WIRELESS COMMUNICATIONS
    81.
    发明申请
    METHODS AND APPARATUS FOR COMMON CHANNEL CANCELLATION IN WIRELESS COMMUNICATIONS 有权
    无线通信中通用通道取消的方法和设备

    公开(公告)号：US20090325586A1

    公开(公告)日：2009-12-31

    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

    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。

    PHASE-NOISE RESILIENT GENERATION OF A CHANNEL QUALITY INDICATOR
    82.
    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

    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。

    Frequency scan for CDMA acquisition
    83.
    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

    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。

    Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system
    84.
    发明授权
    Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system 失效
    用于在CDMA通信系统中对来自多个基站的传输进行时间调整的方法和装置

    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）。

    POWER CONTROL FOR A CHANNEL WITH MULTIPLE FORMATS IN A COMMUNICATION SYSTEM
    85.
    发明申请
    POWER CONTROL FOR A CHANNEL WITH MULTIPLE FORMATS IN A COMMUNICATION SYSTEM 有权
    在通信系统中具有多个格式的通道的功率控制

    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。

    Reliability determination and combining of power control commands received in a wireless communication system
    86.
    发明授权
    Reliability determination and combining of power control commands received in a wireless communication system 有权
    在无线通信系统中接收的功率控制命令的可靠性确定和组合

    公开(公告)号：US07340268B2

    公开(公告)日：2008-03-04

    申请号：US10457846

    申请日：2003-06-10

    Applicant: Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Messay Amerga ,  Chih-Ping Hsu ,  Christopher C. Riddle ,  Andrew Sendonaris

    Inventor： Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Messay Amerga ,  Chih-Ping Hsu ,  Christopher C. Riddle ,  Andrew Sendonaris

    IPC: H04B7/00 ,  H04Q7/20

    CPC classification number: H04W52/56 ,  H04W52/40 ,  H04W52/58

    Abstract: The reliability of transmit power control (TPC) commands received from a transmitter is determined based on a TPC target value. The TPC target value is derived based on a TPC threshold and possibly a weight, depending on the receiver implementation. A received TPC command is considered reliable if its absolute value exceeds the TPC target value. Received TPC commands deemed as unreliable are discarded and not used for power control. Multiple TPC target values, used for detecting UP and DOWN commands, may be derived with multiple scaling factors. For a receiver in soft handover and receiving TPC commands from multiple transmitters, a different TPC target value may be derived for each transmitter. The received TPC commands for each transmitter are compared against that transmitter's TPC target value. Received TPC commands deemed as unreliable are discarded and not combined.

    Abstract translation: 基于TPC目标值确定从发射机接收的发射功率控制（TPC）命令的可靠性。 TPC目标值基于TPC阈值和可能的权重导出，这取决于接收机实现。 如果接收到的TPC命令的绝对值超过TPC目标值，则认为它是可靠的。 被认为不可靠的TPC命令被丢弃，不用于功率控制。 用于检测UP和DOWN命令的多个TPC目标值可以用多个缩放因子导出。 对于软切换中的接收机和从多个发射机接收TPC命令，可以为每个发射机导出不同的TPC目标值。 每个发射机接收的TPC命令与该发射机的TPC目标值进行比较。 被认为不可靠的TPC命令被丢弃并不组合。

    POWER CONTROL AVOIDING OUTER LOOP WIND-UP
    87.
    发明申请
    POWER CONTROL AVOIDING OUTER LOOP WIND-UP 有权
    电源控制避免外循环

    公开(公告)号：US20070218935A1

    公开(公告)日：2007-09-20

    申请号：US11750938

    申请日：2007-05-18

    Applicant: Richard Chi ,  Da-Shan Shiu ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

    Inventor： Richard Chi ,  Da-Shan Shiu ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

    IPC: H04Q7/20

    CPC classification number: H04W52/228 ,  H04W52/12 ,  H04W52/20 ,  H04W52/221 ,  H04W52/24 ,  H04W52/241 ,  H04W52/248 ,  H04W52/36

    Abstract: Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.

    Abstract translation: 公开了避免外圈卷绕的功率控制技术。 在一个方面，检测目标功率电平的上升，并且响应地改变目标功率电平。 在另一方面，检测目标功率电平的展开，之后在不考虑卷绕的情况下确定目标功率电平。 还提出了各种其他方面，包括卷绕和展开检测程序以及目标功率级别修改程序。 这些方面具有减少发射功率超过必要时间的优点，从而增加系统容量和性能，并减轻系统资源的分配不当。

Patent Agency Ranking