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    • 31. 发明申请
    • METHOD AND ARRANGEMENT FOR INTERFERENCE MITIGATION
    • 干扰减缓的方法和布置
    • US20120108194A1
    • 2012-05-03
    • US12941121
    • 2010-11-08
    • Fredrik LindqvistFredrik Huss
    • Fredrik LindqvistFredrik Huss
    • H04B1/10
    • 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选择性地使用S50来减轻接收信号的干扰,以在具有多普勒频率的信道上提供具有改进质量的接收信号。
    • 32. 发明授权
    • Systems and methods for tracking power peaks of a signal
    • 用于跟踪信号功率峰值的系统和方法
    • US08055278B2
    • 2011-11-08
    • US12274808
    • 2008-11-20
    • Ulf SkärbyErling FloserFredrik Huss
    • Ulf SkärbyErling FloserFredrik Huss
    • H04Q7/20
    • H04W56/004H04W60/00H04W84/047
    • In one aspect, the invention provides a method for tracking a mobile terminal. In some embodiments, this method includes the following steps: receiving a signal transmitted from the mobile terminal; searching a primary search area for a signal associated with the mobile terminal; searching a secondary search area for a signal associated with the mobile terminal, wherein the secondary search area is larger than the primary search area; determining the strength of a signal associated with the mobile terminal that was found by searching the secondary search area; and determining whether the primary search area should be modified based on the determined strength of the signal that was found by searching the secondary search area.
    • 一方面,本发明提供了一种跟踪移动终端的方法。 在一些实施例中,该方法包括以下步骤:接收从移动终端发送的信号; 搜索主搜索区域以获取与所述移动终端相关联的信号; 搜索辅助搜索区域以获取与所述移动终端相关联的信号,其中所述辅助搜索区域大于所述主搜索区域; 确定通过搜索辅助搜索区域找到的与移动终端相关联的信号的强度; 以及基于通过搜索辅助搜索区域确定的信号的确定的强度来确定是否应该修改主搜索区域。
    • 37. 发明申请
    • Method, Base Station and Apparatus in a Base Station for Reducing Intermodulation Distortion
    • 用于减少互调失真的基站中的方法,基站和装置
    • US20150111515A1
    • 2015-04-23
    • US14399222
    • 2012-05-24
    • Youping SuAlireza NejatianFredrik Huss
    • Youping SuAlireza NejatianFredrik Huss
    • H04B1/10
    • H04B1/1027H04B1/525
    • A method in a base station is provided for reducing distortion of an uplink signal received in a receiver part (20) of the base station, said distortion being caused by intermodulation, IM, products. The method comprises: generating (106), from a transmitter source signal, a modeled signal of IM components, as nth order IM components of the transmitter source signal, n being an integer value of 2, 3, 4 and/or 5 etc., and detecting (110) IM products of the received uplink signal, the received uplink signal comprising UL traffic components and the IM products, by correlating the received uplink signal with the IM components of the modeled signal. The method further comprises producing (112) a cancellation signal based on the detected IM products of the received uplink signal, and subtracting (114) the cancellation signal from the received uplink signal. Also, a similar apparatus in a base station is provided.
    • 提供了一种基站中的方法,用于减少在基站的接收机部分(20)中接收的上行链路信号的失真,所述失真是由互调,IM,乘积引起的。 该方法包括:从发射机源信号产生(106)IM分量的建模信号,作为发射机源信号的n阶IM分量,n是2,3,4和/或5等的整数值。 并且通过将接收到的上行链路信号与建模信号的IM分量相关联来检测(110)所接收的上行链路信号的IM产品,所接收的上行链路信号包括UL业务分量和IM产品。 该方法还包括基于检测到的接收到的上行链路信号的IM产物产生(112)消除信号,以及从接收到的上行链路信号中减去(114)消除信号。 此外,提供了基站中的类似装置。
    • 38. 发明授权
    • Method and arrangement for improved interference rejection combining
    • 改进的抗干扰组合方法和布置
    • US08699448B2
    • 2014-04-15
    • US13513575
    • 2009-12-09
    • Fredrik LindqvistFredrik Huss
    • Fredrik LindqvistFredrik Huss
    • H04W4/00
    • H04J11/0046
    • In a method of interference rejection combining (IRC) for mitigating interference in received signals in the frequency domain for a telecommunication system, selecting (S 10) a sub-group of frequencies of a received signal, determining (S20) a joint representation of a covariance matrix for the interference plus noise for at least one time slot of the received signal for the selected sub-group of frequencies, determining (S30) a channel estimate based on at least one pilot symbol of said at least one time slot. Finally, determining (S40) IRC coefficients in the frequency domain for each symbol of said at least one time slot based on said determined joint representation of the covariance matrix and said determined channel estimate.
    • 在用于减轻电信系统的频域中的接收信号干扰的干扰抑制组合(IRC)的方法中,选择(S10)接收信号的一个子组的频率,确定(S20) 用于针对所选择的频率组的接收信号的至少一个时隙的干扰加噪声的协方差矩阵,基于所述至少一个时隙的至少一个导频符号来确定(S30)信道估计。 最后,基于所述确定的协方差矩阵的联合表示和所确定的信道估计,确定(S40)所述至少一个时隙的每个符号的频域中的IRC系数。
    • 39. 发明授权
    • Method and apparatus relating to channel decoding
    • 与信道解码有关的方法和装置
    • US08230306B2
    • 2012-07-24
    • US12302999
    • 2006-06-01
    • Fredrik Huss
    • Fredrik Huss
    • G06F11/00
    • H03M13/3994H03M13/09H03M13/175H03M13/4123H03M13/6362H04L1/0041H04L1/0059H04L1/0061H04L1/0073
    • The present invention relates to channel decoding and provides ways and means for improved channel decoding of data frames. The frame has been channel encoded and transmitted to a receiver (3a). The frame includes a part (51, 53) with information that is unknown to the receiver and another part (54, 55) with information for which the receiver generates at least one data hypothesis predicting its information content. The receiver performs a hypothesis-based decoding (149) of the received encoded frame, wherein the at least one data hypothesis is used to improve a probability of successful decoding. The invention may advantageously be used to improve decoding of frames containing short control messages with fill bits, e.g. acknowledgement messages (17).
    • 本发明涉及信道解码,并且提供了改进数据帧的信道解码的方式和手段。 该帧已被信道编码并被发送到接收机(3a)。 该帧包括具有对于接收机未知的信息的部分(51,53)和具有信息的另一部分(54,55),其中接收器生成预测其信息内容的至少一个数据假设。 接收机执行接收的编码帧的基于假设的解码(149),其中使用至少一个数据假设来提高成功解码的概率。 本发明可以有利地用于改善包含具有填充比特的短控制消息的帧的解码,例如, 确认消息(17)。