Battery operated radio receivers having power save by reducing active reception time
    41.
    发明授权
    Battery operated radio receivers having power save by reducing active reception time 有权
    电池供电的无线电接收机通过减少主动接收时间节省功率

    公开(公告)号:US06782250B2

    公开(公告)日:2004-08-24

    申请号:US10449131

    申请日:2003-06-02

    CPC classification number: H04W52/0235 Y02D70/00

    Abstract: A portable radio receiver and a method of operating the radio receiver during Standby Mode is provided. The method comprises deactivating at least part of a receive path of a receiver until the start of a data-detection time interval in a frame in the event that estimated values of predetermined characteristics of a signal received by the receiver during the frame are within corresponding thresholds. The predetermined characteristics are affected by pre-conditioning functions performed on the receiver prior to the start of the data-detection time interval.

    Abstract translation: 提供便携式无线电接收机和在待机模式期间操作无线电接收机的方法。 该方法包括在帧内的接收机接收的信号的预定特性的估计值在相应的阈值内的情况下,去激活接收机的接收路径的至少部分,直到在帧内的数据检测时间间隔开始 。 预定特性受数据检测时间间隔开始之前在接收机上执行的预处理功能的影响。

    System and method for joint time tracking of multiple paths
    42.
    发明授权
    System and method for joint time tracking of multiple paths 有权
    多路径联合时间跟踪的系统和方法

    公开(公告)号:US06674793B2

    公开(公告)日:2004-01-06

    申请号:US09966736

    申请日:2001-10-01

    CPC classification number: H04B1/7117 H04B1/7085 H04B2201/70709

    Abstract: In a receiver having at least two fingers, the fingers tracking at least one path of a multipath channel, a method includes the steps of forming a finger block of at least two of the two fingers and jointly tracking the fingers of said finger block. The step of jointly tracking includes the steps of generating direction metrics of each of a set of possible directions of joint movement of the fingers of the finger block, selecting one of the direction metrics according to a predetermined criterion, and moving the fingers of the finger block in the directions indicated by the selected direction metric.

    Abstract translation: 在具有至少两个手指的接收器中,手指跟踪多径信道的至少一个路径,方法包括以下步骤:形成两个手指中的至少两个手指的手指块并联合跟踪所述手指块的手指。 联合跟踪的步骤包括以下步骤:产生手指块的手指的联合移动的一组可能方向中的每一个的方向度量,根据预定标准选择方向度量之一,以及移动手指的手指 按所选方向度量标示的方向阻塞。

    Channel estimator
    43.
    发明授权
    Channel estimator 失效
    通道估计器

    公开(公告)号:US06603823B1

    公开(公告)日:2003-08-05

    申请号:US09438475

    申请日:1999-11-12

    CPC classification number: H04L1/20 H04B2201/70701 H04L25/0232

    Abstract: The present invention is a channel estimator based on the values of received data and on a priori probabilities only of received symbols. The channel estimator includes a symbol probability generator, a noise variance estimator and a channel tap estimator. The symbol probability generator generates a priori probabilities only of transmitted symbols found in the received signal(s). The noise variance estimator estimates at least one noise variance corrupting the received signal(s). The channel tap estimator generates channel estimates from the received signal(s), the a priori probabilities and the noise variance(s).

    Abstract translation: 本发明是基于接收数据的值和仅接收符号的先验概率的信道估计器。 信道估计器包括符号概率发生器,噪声方差估计器和信道抽头估计器。 符号概率发生器仅生成在接收信号中发现的发送符号的先验概率。 噪声方差估计器估计至少一个噪声方差破坏接收到的信号。 信道抽头估计器从接收到的信号,先验概率和噪声方差生成信道估计。

    Systems and methods for communication using dedicated reference signal (DRS)
    44.
    发明授权
    Systems and methods for communication using dedicated reference signal (DRS) 有权
    使用专用参考信号(DRS)进行通信的系统和方法

    公开(公告)号:US08699633B2

    公开(公告)日:2014-04-15

    申请号:US13543835

    申请日:2012-07-08

    Abstract: A method for communication includes receiving in a receiver signals, which include one or more dedicated reference signals and are transmitted from a transmitter over a communication channel in multiple blocks. The signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective precoding scheme that maps the signals onto multiple antenna ports of the transmitter. One or more parameters of the communication channel are estimated over the dedicated reference signals included in two or more of the blocks whose respective precoding schemes do not differ from one another. The signals are decoded based on the estimated parameters.

    Abstract translation: 一种用于通信的方法包括在接收机中接收包括一个或多个专用参考信号的信号,并且通过多个块中的通信信道从发射机发送。 包括专用参考信号的每个块中的信号在相应的时间间隔上在相应的子载波组上发送,并且使用将信号映射到发射机的多个天线端口的相应预编码方案进行预编码。 对通信信道的一个或多个参数通过包含在其各自的预编码方案彼此不同的两个或更多个块中的专用参考信号进行估计。 信号根据估计的参数进行解码。

    Systems and methods for communication using dedicated reference signal (DRS)
    45.
    发明授权
    Systems and methods for communication using dedicated reference signal (DRS) 有权
    使用专用参考信号(DRS)进行通信的系统和方法

    公开(公告)号:US08699528B2

    公开(公告)日:2014-04-15

    申请号:US12983898

    申请日:2011-01-04

    Abstract: A method for communication includes receiving in a receiver signals, which include one or more dedicated reference signals, that are transmitted from a transmitter over a communication channel in multiple blocks. The signals in each block, including the dedicated reference signals, are transmitted on a respective group of subcarriers over a respective time interval and are precoded using a respective precoding scheme that maps the signals onto multiple antenna ports of the transmitter. Based on the received signals, feedback is computed in the receiver with respect to the communication channel in each of multiple spectral sub-bands, and the feedback for the multiple spectral sub-bands is reported to the transmitter. One or more parameters of the communication channel are estimated jointly over the dedicated reference signals included in each of the spectral sub-bands for which the feedback is reported. The signals are decoded based on the estimated parameters.

    Abstract translation: 一种用于通信的方法包括在接收器中接收包括一个或多个专用参考信号的信号,所述信号通过多个块中的通信信道从发射机发送。 包括专用参考信号的每个块中的信号在相应的时间间隔上在相应的子载波组上发送,并且使用将信号映射到发射机的多个天线端口的相应预编码方案进行预编码。 基于接收的信号,在接收机中针对多个频谱子带中的每一个中的通信信道计算反馈,并且将多个频谱子带的反馈报告给发射机。 通过包括在报告反馈的每个频谱子带中的专用参考信号联合地估计通信信道的一个或多个参数。 信号根据估计的参数进行解码。

    Feedback and user scheduling for multi-user multiple input multiple output (MU-MIMO) system
    46.
    发明授权
    Feedback and user scheduling for multi-user multiple input multiple output (MU-MIMO) system 有权
    多用户多输入多输出(MU-MIMO)系统的反馈和用户调度

    公开(公告)号:US08611447B1

    公开(公告)日:2013-12-17

    申请号:US12713064

    申请日:2010-02-25

    CPC classification number: H04B7/0452 H04B7/0456 H04B7/0632 H04B7/0639

    Abstract: Some of the embodiments of the present disclosure provide a method comprising selecting, by a user equipment (UE), a preferred interference precoding matrix from a plurality of candidate precoding matrices included in a codebook; and transmitting, by the user equipment to a communication node, a preferred interference precoding matrix index (PMI) corresponding to the preferred interference precoding matrix included in the codebook. Other embodiments are also described and claimed.

    Abstract translation: 本公开的一些实施例提供了一种方法,包括由用户设备(UE)从包括在码本中的多个候选预编码矩阵中选择优选的干扰预编码矩阵; 以及由所述用户设备向通信节点发送与所述码本中包含的优选干扰预编码矩阵相对应的优选干扰预编码矩阵索引(PMI)。 还描述和要求保护其他实施例。

    Correction of timing errors to enable long sleep times
    48.
    发明授权
    Correction of timing errors to enable long sleep times 有权
    修正定时错误,以延长睡眠时间

    公开(公告)号:US08504079B1

    公开(公告)日:2013-08-06

    申请号:US13601699

    申请日:2012-08-31

    Abstract: A mobile user equipment includes a user equipment clock and a dual mode time tracker. The clock periodically wakes up the user equipment. The dual mode time tracker uses a serving cell reference signal to correct timing errors of the user equipment clock with respect to a network clock while timing errors remain minimal and otherwise uses a serving cell synchronization signal to correct timing errors of the user equipment clock. The dual mode time tracker also sets a next wakeup time as a function at least of the size of the timing errors.

    Abstract translation: 移动用户设备包括用户设备时钟和双模式时间跟踪器。 时钟定时唤醒用户设备。 双模式时间跟踪器使用服务小区参考信号来校正用户设备时钟相对于网络时钟的定时误差,同时定时误差保持最小,否则使用服务小区同步信号来校正用户设备时钟的定时误差。 双模式时间跟踪器还将下一个唤醒时间设置为至少是定时误差的大小的函数。

    Method and apparatus of system scheduler
    49.
    发明授权
    Method and apparatus of system scheduler 有权
    系统调度器的方法和装置

    公开(公告)号:US08072941B2

    公开(公告)日:2011-12-06

    申请号:US12613122

    申请日:2009-11-05

    Abstract: Briefly, according to embodiments of the invention, there is provided a wireless communication system and a method to receive by a base station from a first mobile station a first chain of data symbols transmitted by at least two antennas and having a first transmit diversity, to receive from a second mobile station a second chain of data symbols transmitted by at least two antennas and having a second transmit diversity. Both first and second chains of data symbols are transmitted from the first and second mobile stations at the same time, modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme and encoded by a space time block codes scheme.

    Abstract translation: 简而言之,根据本发明的实施例,提供了一种无线通信系统和方法,用于由基站从第一移动台接收由至少两个天线发送并具有第一发射分集的第一数据符号链,并具有第一发射分集, 从第二移动台接收由至少两个天线发射并具有第二发射分集的第二数据符号链。 数据符号的第一和第二链同时从第一和第二移动站发送,根据正交频分复用(OFDM)方式进行调制,并由空时块编码方案编码。

    Feedback Strategies for Multi-User MIMO Communication Systems
    50.
    发明申请
    Feedback Strategies for Multi-User MIMO Communication Systems 有权
    多用户MIMO通信系统的反馈策略

    公开(公告)号:US20100254474A1

    公开(公告)日:2010-10-07

    申请号:US12723645

    申请日:2010-03-14

    CPC classification number: H04B7/0452 H04B7/0417 H04B7/0632

    Abstract: A method for signal processing in a receiver includes receiving in the receiver a Multi-User Multiple-Input Multiple-Output (MU-MIMO) signal. The MU-MIMO signal includes at least a first signal, which is precoded using a first precoding scheme and is addressed to the receiver, and a second signal, which is precoded using a second precoding scheme. An average error rate achievable in decoding the first signal in the presence of the second signal is computed. The average error rate is computed over a set of possible choices of the second precoding scheme. The first precoding scheme is selected from among a plurality of available precoding schemes so as to satisfy a criterion defined over the average error rate. The receiver sends feedback to a transmitter transmitting the first signal. The feedback depends on the selected first precoding scheme and causes the transmitter to control transmission of the first signal.

    Abstract translation: 一种接收机中的信号处理方法包括在接收机中接收多用户多输入多输出(MU-MIMO)信号。 MU-MIMO信号至少包括第一信号,其使用第一预编码方案进行预编码,并且被寻址到接收机;以及第二信号,其使用第二预编码方案被预编码。 计算在存在第二信号时对第一信号进行解码时可实现的平均误码率。 在第二预编码方案的一组可能选择上计算平均错误率。 从多个可用预编码方案中选择第一预编码方案,以便满足在平均错误率上定义的标准。 接收机向发送第一个信号的发射机发送反馈。 反馈取决于所选择的第一预编码方案,并且使得发射机控制第一信号的传输。

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