TRACKING LOOP ENHANCEMENTS FOR MITIGATING SIGNAL INTERFERENCE AND ADJUSTING SIGNAL POWER
    42.
    发明申请
    TRACKING LOOP ENHANCEMENTS FOR MITIGATING SIGNAL INTERFERENCE AND ADJUSTING SIGNAL POWER 审中-公开
    跟踪信号干扰和调整信号功率的环路增强

    公开(公告)号:US20130107785A1

    公开(公告)日:2013-05-02

    申请号:US13447067

    申请日:2012-04-13

    IPC分类号: H04W4/00 H04H20/71

    摘要: A method, an apparatus, and a computer program product for wireless communication are provided for maintaining a time tracking loop (TTL) to increase an overall signal-to-noise ratio (SNR) of a signal. The signal includes a series of consecutive symbols, received via multiple signal paths with different delays in a subframe. When attempting to decode the signal, only part of a symbol for a signal path may be captured in a fast Fourier transform (FFT) window due to the multiple signal path delays, leading to inter-channel interference (ICI), inter-symbol interference (ISI), and/or power loss. The SNR may be increased by optimizing a FFT window position when decoding the signal. An optimal FFT window position may be based on a subframe type. Moreover, the SNR may be increased by performing a linear operation on samples of the symbol prior to performing the FFT.

    摘要翻译: 提供了一种用于无线通信的方法,装置和计算机程序产品,用于维持时间跟踪环(TTL)以增加信号的总体信噪比(SNR)。 该信号包括一系列连续符号,通过在子帧中具有不同延迟的多个信号路径接收。 当尝试对信号进行解码时,由于多路信号路径延迟,只能在快速傅里叶变换(FFT)窗口中捕获信号路径的一部分符号,从而导致信道间干扰(ICI),符号间干扰 (ISI)和/或功率损耗。 可以通过在对信号进行解码时优化FFT窗口位置来增加SNR。 最佳FFT窗口位置可以基于子帧类型。 此外,可以通过对执行FFT之前的符号的采样执行线性运算来增加SNR。

    Method and apparatus for computing and reporting channel quality indication (CQI)
    43.
    发明授权
    Method and apparatus for computing and reporting channel quality indication (CQI) 有权
    用于计算和报告信道质量指示(CQI)的方法和装置

    公开(公告)号:US08432873B2

    公开(公告)日:2013-04-30

    申请号:US12652605

    申请日:2010-01-05

    IPC分类号: H04B7/216

    摘要: Techniques for computing and reporting channel quality indication (CQI) are described. In an aspect, a plurality of CQI computation methods may be supported, and each CQI computation method may indicate how CQI should be computed. One CQI computation method may be selected for use. CQI may then be computed and reported in accordance with the selected CQI computation method. In an exemplary design, a user equipment (UE) may obtain a selected method for computing CQI, which may be chosen based on the UE capability and/or other factors. The selected method may specify (i) CQI computation for a specific codeword among a plurality of codewords or (ii) CQI computation by averaging signal quality across a plurality of layers used for transmission. The UE may compute CQI in accordance with the selected method, send the CQI to a base station, and receive data sent by the base station based on the CQI.

    摘要翻译: 描述了用于计算和报告信道质量指示(CQI)的技术。 在一个方面,可以支持多个CQI计算方法,并且每个CQI计算方法可以指示如何计算CQI。 可以选择一种CQI计算方法来使用。 然后可以根据所选择的CQI计算方法来计算和报告CQI。 在示例性设计中,用户设备(UE)可以获得用于计算CQI的所选择的方法,其可以基于UE能力和/或其他因素来选择。 所选择的方法可以指定(i)针对多个码字中的特定码字的CQI计算,或者(ii)通过用于传输的多个层平均信号质量的CQI计算。 UE可以根据所选择的方法计算CQI,向基站发送CQI,并且基于CQI接收由基站发送的数据。

    DETERMINATION OF NETWORK SYNCHRONIZATION
    44.
    发明申请
    DETERMINATION OF NETWORK SYNCHRONIZATION 有权
    网络同步的确定

    公开(公告)号:US20120044928A1

    公开(公告)日:2012-02-23

    申请号:US13212829

    申请日:2011-08-18

    IPC分类号: H04J3/06

    摘要: User equipment (UE) associated with synchronous networks operate in a synchronous mode while UEs associated with asynchronous networks operate in an asynchronous mode. When operating in a synchronous mode, a UE can significantly improve performance of synchronization signal detection, data decoding, and tracking loop management by using the interference cancellation (IC) techniques that are not available in an asynchronous mode of operation. Obtaining synchronization indicators and determining the synchronization status of the current network by UE is disclosed. The determination may be based on the synchronization indicator, whether detected through signal detection, signal measurements, signal analysis, or the like.

    摘要翻译: 与同步网络相关联的用户设备(UE)以同步模式工作,而与异步网络相关联的UE以异步模式工作。 当在同步模式下工作时,UE可以通过使用在异步操作模式中不可用的干扰消除(IC)技术来显着提高同步信号检测,数据解码和跟踪环路管理的性能。 公开了获取同步指示符并确定UE当前网络的同步状态。 该确定可以基于通过信号检测,信号测量,信号分析等检测的同步指示器。

    INTERFERENCE CANCELLATION
    45.
    发明申请
    INTERFERENCE CANCELLATION 有权
    干扰消除

    公开(公告)号:US20110267937A1

    公开(公告)日:2011-11-03

    申请号:US13096667

    申请日:2011-04-28

    IPC分类号: H04J3/10

    摘要: A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones.

    摘要翻译: 增强异构无线网络中的覆盖和/或吞吐量的方法包括检测相邻小区与服务小区之间的干扰。 该方法还包括使用基于干扰是否具有冲突公共参考信号(CRS)音调的自适应技术来消除干扰。

    PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS
    47.
    发明申请
    PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS 有权
    在无线网络中预测控制信道

    公开(公告)号:US20110141927A1

    公开(公告)日:2011-06-16

    申请号:US12816708

    申请日:2010-06-16

    IPC分类号: H04L12/26 H04W4/00

    摘要: Systems and methodologies are described that facilitate precoding signals transmitted over downlink control channels to provide transmit diversity. A dedicated reference signal (DRS) related to a wireless device can additionally be precoded such that the wireless device can determine a precoder or related parameters based at least in part on performing a channel estimate for the precoded DRS signal. The wireless device can utilize the determined precoder or related parameters to decode precoded signals received over downlink control channel resources. Additionally or alternatively, an access point can signal a sequence of precoders to the wireless device. The access point can cycle through the sequence of precoders to precode signals for transmission over downlink control channel resources, and the wireless device can decode the signals based at least in part on similarly cycling through the precoders for received signals.

    摘要翻译: 描述了促进预编码在下行链路控制信道上发送的信号以提供发射分集的系统和方法。 可以另外对与无线设备相关的专用参考信号(DRS)进行预编码,使得无线设备可以至少部分地基于对预编码的DRS信号执行信道估计来确定预编码器或相关参数。 无线设备可以利用所确定的预编码器或相关参数来解码通过下行链路控制信道资源接收的预编码信号。 附加地或替代地,接入点可以向无线设备发送一系列预编码器。 接入点可以循环通过预编码器序列来预编码信号以在下行链路控制信道资源上传输,并且无线设备可以至少部分地基于类似地循环通过用于接收信号的预编码器来对信号进行解码。

    MONITORING AND CORRECTING TIMING ERRORS IN WIRELESS COMMUNICATION
    48.
    发明申请
    MONITORING AND CORRECTING TIMING ERRORS IN WIRELESS COMMUNICATION 有权
    监测和校正无线通信中的时序错误

    公开(公告)号:US20110116561A1

    公开(公告)日:2011-05-19

    申请号:US12620866

    申请日:2009-11-18

    IPC分类号: H04L27/28

    CPC分类号: H04L27/2673 H04L27/2665

    摘要: Providing for improved tracking and correction of timing in wireless communications is disclosed herein. By way of example, a first algorithm can be employed to track timing of a wireless signal, based on one dimension of the signal. Additionally, a second algorithm based on a different dimension of the signal can be employed to verify the timing and reduce errors in timing analysis. Various signal dimensions can be employed for the analysis, including cyclic prefix, frequency, channel impulse response, or the like, or a combination thereof. Additionally, different channels of the wireless signal can also be analyzed by the first algorithm and the second algorithm. Furthermore, the second algorithm can be selected to reduce deficiencies identified in the first algorithm, to improve overall timing analysis, reduce undetected timing errors or false errors, and improve timing correction.

    摘要翻译: 本文公开了提供无线通信中的改进的定时跟踪和校正。 作为示例,可以采用第一算法来基于信号的一个维度来跟踪无线信号的定时。 另外,可以采用基于信号的不同维度的第二算法来验证定时并减少定时分析中的误差。 可以采用各种信号尺寸进行分析,包括循环前缀,频率,信道脉冲响应等,或其组合。 此外,无线信号的不同信道也可以通过第一算法和第二算法进行分析。 此外,可以选择第二算法以减少在第一算法中识别的缺陷,以改善总体时序分析,减少未检测到的定时误差或错误误差,并且改善定时校正。

    TIME AND FREQUENCY ACQUISITION AND TRACKING FOR OFDMA WIRELESS SYSTEMS
    49.
    发明申请
    TIME AND FREQUENCY ACQUISITION AND TRACKING FOR OFDMA WIRELESS SYSTEMS 有权
    OFDMA无线系统的时间和频率采集和跟踪

    公开(公告)号:US20110092231A1

    公开(公告)日:2011-04-21

    申请号:US12900285

    申请日:2010-10-07

    申请人: Taesang Yoo Tao Luo

    发明人: Taesang Yoo Tao Luo

    IPC分类号: H04B15/00

    摘要: Obtaining a timing reference in wireless communication is facilitated when desiring to communicate with a weak serving base station (such as an evolved NodeB) in the presence of a stronger interfering base station. The user equipment (UE) may track a stronger interfering base station's timing, or the UE may track a timing that is derived by a composite power delay profile (PDP) from multiple base stations. The composite PDP may be constructed by adjusting individual base station PDPs according to a weighting scheme. The timing obtained in such a manner may be used for estimation of the channel of the interfering base station and cancelling interfering signals from the base station. It may also be used to estimate the channel of the serving base station after adding a backoff. The UE may track a stronger interfering base station's frequency, or the UE may track a composite frequency.

    摘要翻译: 当在较强的干扰基站的存在下希望与弱服务基站(诸如演进的节点B)进行通信时,便于获得无线通信中的定时参考。 用户设备(UE)可以跟踪更强的干扰基站的定时,或者UE可以跟踪由多个基站由复合功率延迟分布(PDP)导出的定时。 可以通过根据加权方案调整各个基站PDP来构成复合PDP。 以这种方式获得的定时可以用于干扰基站的信道的估计和从基站的抵消干扰信号。 也可以用于在添加退避后估计服务基站的信道。 UE可以跟踪更强的干扰基站的频率,或者UE可以跟踪复合频率。