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    • 2. 发明申请
    • METHOD AND ARRANGEMENT FOR INTERFERENCE MITIGATION
    • 干扰减缓的方法和布置
    • WO2012057666A1
    • 2012-05-03
    • PCT/SE2010/051179
    • 2010-10-29
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)LINDQVIST, FredrikHUSS, Fredrik
    • LINDQVIST, FredrikHUSS, Fredrik
    • H04B7/08
    • H04B7/0871H04B7/0854H04B17/345
    • In a method of mitigating interference for received signals in a communication system, receiving S10 a transmitted signal via at least two antenna elements, estimating S20 a channel for the received signals, and estimating S30 a disturbance covariance matrix based on the channel estimate, which estimated disturbance covariance matrix represents received interference plus noise of the received signals. Subsequently, adapting S40 the estimated covariance matrix by enhancing the diagonal elements of the covariance matrix to provide an enhanced covariance matrix, to reduce the spread in eigenvalues of the covariance matrix, and thereby improve the robustness of the covariance matrix. Finally, selectively S50 using IRC and/or MRC to mitigate interference of the received signals, based on at least the channel estimate and on the enhanced covariance matrix, to provide a received signal with improved quality on channels with Doppler frequency.
    • 在减轻通信系统中的接收信号的干扰的方法中,经由至少两个天线元件接收S10发送的信号,估计S20接收信号的信道,并且基于所估计的信道估计估计S30干扰协方差矩阵 干扰协方差矩阵表示接收信号的接收干扰加噪声。 随后,通过增强协方差矩阵的对角元素来适应S40估计的协方差矩阵,以提供增强的协方差矩阵,以减小协方差矩阵的特征值的扩展,从而提高协方差矩阵的鲁棒性。 最后,基于至少信道估计和增强协方差矩阵,使用IRC和/或MRC选择性地S50来减轻接收信号的干扰,以在多普勒频率的信道上提供具有改进质量的接收信号。
    • 5. 发明申请
    • UPLINK SYNCHRONIZATION PROCESSING
    • 上拉同步处理
    • WO2011087416A2
    • 2011-07-21
    • PCT/SE2010/050038
    • 2010-01-15
    • Telefonaktiebolaget LM Ericsson (publ)LANGEREIS, AlexanderHUSS, Fredrik
    • LANGEREIS, AlexanderHUSS, Fredrik
    • H04W56/00
    • H04W56/0045
    • Uplink synchronization of user equipment, UE, (30, 40, 50) served by a radio base station, RBS, (20) is enabled by triggering (re)start of timing alignment, TA, timer (180) in response to a first TA command. Uplink timing of data received from the UE (30, 40, 50) during a measuring time window (63) constituting a defined sub-interval of a time interval (60) of the TA timer (180) is measured and employed for determining a timing advance for the UE (30, 40, 50). Transmission of a second TA command comprising a notification of the timing advance is co-scheduled together with a scheduled downlink data transmission to the UE (30, 40, 50) during a following scheduling time window (65) constituting a defined sub-interval of the time interval (60). The number of TA commands that are scheduled by themselves are minimized to free radio resources and increase the downlink throughput.
    • 由无线电基站RBS(20)服务的用户设备UE(30,40,50)的上行链路同步通过触发(重新)定时对准的开始,TA,计时器(180)响应于第一 TA指令。 测量构成TA定时器(180)的时间间隔(60)的限定子间隔的测量时间窗(63)期间从UE(30,40,50)接收的数据的上行时序,并用于确定 UE的定时提前(30,40,50)。 在后续的调度时间窗口(65)中,包括定时提前的通知的第二TA命令的传输与调度的下行链路数据传输一起被调度到UE(30,40,50) 时间间隔(60)。 自己调度的TA命令的数量被最小化,以便释放无线电资源并增加下行吞吐量。