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    • 32. 发明申请
    • CHANNEL ESTIMATION ENHANCED LMS EQUALIZER
    • 信道估计增强LMS均衡器
    • WO2006101997A2
    • 2006-09-28
    • PCT/US2006/009556
    • 2006-03-16
    • INTERDIGITAL TECHNOLOGY CORPORATIONPIETRASKI, Philip, J.
    • PIETRASKI, Philip, J.
    • H03H7/40H03D1/04
    • H03H21/0043H03H2021/0056H04L25/0226H04L25/03019H04L2025/03496H04L2025/03611
    • The present invention is related to an enhanced equalizer using channel estimation. A scaled version of a channel estimate is used as an expected average behavior of the product of a transmitted signal and a received signal to implement Griffith algorithm. The present invention also uses advance or prediction of a channel estimate to overcome the lag problem inherent in a least means square (LMS) algorithm in a time varying channel. Therefore, the present invention enables the use of a small step size while attaining the same tracking capability with a large step size. A channel estimate at some time in the future is used for updating equalizer filter tap coefficients. This may be performed with a prediction filter. Alternatively, a delay may be introduced in the input data to the filter tap coefficient generator, which makes a channel estimate look like a prediction to the filter tap coefficient generator.
    • 本发明涉及使用信道估计的增强均衡器。 信道估计的缩放版本被用作发射信号和接收信号的乘积的预期平均行为以实现Griffith算法。 本发明还使用信道估计的提前或预测来克服时变信道中最小均方(LMS)算法中固有的滞后问题。 因此,本发明能够在以大的步长获得相同的跟踪能力的同时使用小的步长。 将来某个时间的信道估计用于更新均衡器滤波器抽头系数。 这可以用预测滤波器来执行。 或者,可以将输入数据中的延迟引入到滤波器抽头系数发生器,这使得信道估计看起来像滤波器抽头系数发生器的预测。
    • 33. 发明申请
    • LOW COMPLEXITY ADAPTIVE CHANNEL ESTIMATION
    • 低复杂自适应信道估计
    • WO2006062767A2
    • 2006-06-15
    • PCT/US2005/043121
    • 2005-11-30
    • INTERDIGITAL TECHNOLOGY CORPORATIONPIETRASKI, Philip, J.
    • PIETRASKI, Philip, J.
    • G06F3/033
    • H04L25/0228H04L25/0212
    • A channel estimation apparatus and method is provided for a wireless communication signal received from at least one relatively mobile wireless transmit/receive unit (WTRU). Predetermined filter coefficients having unique index values are stored in a memory device. An index generator matches estimation values of the mobile unit speed and SNR to a particular filter coefficient, and selects a corresponding index value, whereby the memory performs a look up function according to the index value and outputs a filter coefficient vector. The channel estimation of the wireless communication signal is taken from the output of the filter. Alternatively, a set of parallel filters which run continuously are used to produce several channel estimates, from which the final estimate is selected based on the associated lowest mean square error or highest SNR.
    • 提供了一种用于从至少一个相对移动的无线发射/接收单元(WTRU)接收的无线通信信号的信道估计装置和方法。 具有唯一索引值的预定滤波器系数被存储在存储器件中。 索引发生器将移动单元速度和SNR的估计值与特定的滤波器系数相匹配,并且选择相应的索引值,由此存储器根据索引值执行查找功能并输出滤波器系数向量。 无线通信信号的信道估计取自滤波器的输出。 或者,使用连续运行的一组并行滤波器来产生若干信道估计,基于相关联的最小均方误差或最高SNR,选择最终估计。
    • 36. 发明申请
    • METHOD AND APPARATUS FOR A MILLIMETER WAVE COMMUNICATION SYSTEM
    • 一种用于微波通信系统的方法和装置
    • WO2013086164A1
    • 2013-06-13
    • PCT/US2012/068206
    • 2012-12-06
    • INTERDIGITAL PATENT HOLDINGS, INC.
    • WANG, CarlLI, Yingxue, K.SAHIN, OnurPIETRASKI, Philip, J.PRAGADA, Ravikumar, V.CHARLTON, Gregg, A.
    • H04W48/16H04W48/12H04W36/00H04W36/14
    • H04W40/12H04W36/0055H04W36/14H04W48/12H04W48/16H04W88/02
    • Methods and apparatus for establishment of a milli-meter Wave (mmW) link communication include initial selection of candidate mmW Base stations (mBs) and configuration of mmW acquisition resources and procedures, both with the assistance of the cellular network. Further methods transmit mmW acquisition beacons, process mmW acquisition beacons to achieve mmW beam alignment and timing synchronization, and uplink (UL) reporting via cellular or mmW links. In an example, a mmW wireless transmit/receive unit (WTRU) transmits millimeter wave (mmW) WTRU (mmW WTRU) information over a cellular system to a base station, receives a candidate list of candidate mmW base stations (mB) including mmW acquisition start timing information and calculates correlation values around the received mmW acquisition start timing information for the mBs in the candidate list. The mmw WTRU performs sliding window correlations using signature sequences corresponding to mBs and beams in the candidate list.
    • 用于建立毫米波(mmW)链路通信的方法和装置包括在蜂窝网络的协助下初始选择候选mmW基站(mB)和配置mmW采集资源和程序。 进一步的方法传输mmW采集信标,处理mmW采集信标,以实现mmW光束对准和定时同步,以及通过蜂窝或mmW链路的上行链路(UL)报告。 在一个示例中,mmW无线发射/接收单元(WTRU)通过蜂窝系统向基站发送毫米波(mmW)WTRU(mmW WTRU)信息,接收包括mmW采集的候选mmW基站(mB)的候选列表 开始定时信息,并计算接收到的候选列表中的mB的接收的mmW获取开始定时信息的相关值。 mmw WTRU使用与候选列表中的mB和波束相对应的签名序列来执行滑动窗口相关。
    • 40. 发明申请
    • HIGH FREQUENCY RADIO ENVIRONMENTAL MAPPING AND SYSTEM PROCEDURES
    • 高频无线电环境映射和系统程序
    • WO2015106237A1
    • 2015-07-16
    • PCT/US2015/011113
    • 2015-01-13
    • INTERDIGITAL PATENT HOLDINGS, INC.
    • SAHIN, OnurPRAGADA, Ravikumar, V.PIETRASKI, Philip, J.CASTOR, Douglas, R.CARLTON, Alan, G.TROSSEN, Dirk
    • H04W16/14H04W24/10H04W16/28
    • H04W24/10H04L5/0048H04W16/14H04W16/28H04W72/0446
    • Systems, methods, and instrumentalities are provided to implement a method for radio environment, measurement (REM) scheduling, information extraction, storage and processing to generate terrain and object mapping/identification using higher frequency radio signals, directional transmission techniques and external database information. Described are wireless transmit/receive units (WTRUs) comprising a processor configured to, when the WTRU is in an idle state, receive a common control channel from a millimeter wave base station (mB), decode a measurement schedule included in the common control channel, wherein the measurement schedule includes one or more slots during which sounding signals will be sent, and, determine a slot during which the WTRU is available to measure a sounding signal, and, when the WTRU is in a connected state, receive a dedicated control channel from a millimeter wave base station (mB), decode a measurement schedule and a receiver configuration included in the dedicated control channel, wherein the measurement schedule and the receiver configuration are specific to the WTRU, and wherein the measurement schedule includes one or more slots during which sounding signals will be sent, and determine a slot during which the WTRU is available to measure a sounding signal.
    • 提供系统,方法和手段,以实现无线电环境,测量(REM)调度,信息提取,存储和处理的方法,以使用更高频率的无线电信号,定向传输技术和外部数据库信息来生成地形和对象映射/标识。 描述了包括处理器的无线发射/接收单元(WTRU),其被配置为当WTRU处于空闲状态时从毫米波基站(mB)接收公共控制信道,对包含在公共控制信道中的测量调度进行解码 ,其中所述测量调度包括在其中发送探测信号的一个或多个时隙,以及确定所述WTRU可用于测量探测信号的时隙,以及当所述WTRU处于连接状态时,接收专用控制 来自毫米波基站(mB)的信道解码包括在专用控制信道中的测量调度和接收机配置,其中测量调度和接收机配置是WTRU特有的,并且其中测量调度包括一个或多个时隙 在此期间将发送探测信号,并确定WTRU可用于测量探测信号的时隙。