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    • 1. 发明申请
    • METHOD AND ARRANGEMENT RELATING TO RADIO SIGNAL TRANSMISSIONS
    • 关于无线电信号传输的方法和布置
    • WO2008004921A1
    • 2008-01-10
    • PCT/SE2006/000867
    • 2006-07-07
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)AXNÄS, Johan
    • AXNÄS, Johan
    • G06K9/20
    • H04L27/38H04L25/03191H04L25/067H04L2025/0342H04L2025/03426
    • The present invention aims to provide a method for fast and exact ML low-complexity demodulation in for example MIMO systems. The present invention relates to a method and arrangement for processing signals, especially a Maximum Likelihood (ML) demodulation of Quadrture Amplitude Modulation (QAM) signals, in a digital communications system, having a number of transmit antennas transmitting n T symbols, the method comprises the steps of: using x m , denoting symbols transmitted, wherein m=1... n T , given a channel, selecting i and j and making pre-calculations facilitating finding a best combination of X 1 ...X i-1 , X i+1 ...X j-1 , X j+1 ... X nT for any given X i , X j and a received signal, going through every combination X 1 ...X i-1 , X i+1 ...X j-1 , X j+1 ... X nT and projecting in a number of directions for each of said combinations and generating a list of candidate combinations of X i and X j for each combination X 1 ...X i-1 , X i+1 ...X j-1 , X j+1 ... X nT , and hence generating a list of candidate combinations X 1 ... X nT , and providing a maximum-likelihood symbol combination.
    • 本发明旨在提供一种在例如MIMO系统中用于快速且精确的ML低复杂度解调的方法。 本发明涉及用于处理信号的方法和装置,特别是在数字通信系统中具有多个发射天线的数字通信系统中的Quadrture Amplitude Modulation(QAM)信号的最大似然(ML)解调, SUB>符号,该方法包括以下步骤:使用表示发送的符号的x m,其中m = 1 ... n T T给定信道,选择i和 j并且进行预计算以便于找到X 1,X 2,...,X i + 1的最佳组合。 对于任何给定的X 1,X 3,X 1,X 3,...,X 1,...,X 3,..., 通过每个组合X 1,...,X i-1,X i + 1,/ N SUB 对于所述的每个所述的多个方向,向多个方向突出并且向多个方向突出 组合,并且为每个组合X 1
    • 2. 发明申请
    • COMMUNICATIONS UNIT AND METHOD
    • 通信单元和方法
    • WO2009061254A1
    • 2009-05-14
    • PCT/SE2008/050422
    • 2008-04-14
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)RINGSTRÖM, MarkusAXNÄS, JohanBALDEMAIR, Robert
    • RINGSTRÖM, MarkusAXNÄS, JohanBALDEMAIR, Robert
    • H04B1/10H04L1/00
    • H04B15/02H04L1/0006H04L1/0083
    • The effects of interference between a communication system operating in a frequency area and another system sending out pulses affecting the frequency area can be handled by means of a communication unit (RBSl. MTl) for use in a first cellular communications system, in which at least one type of system sensitive data is transmitted at pre-determined points in time, said communications unit comprising transmitting means (14, 24) arranged to transmit said system sensitive data and processing means (1 1, 21) arranged to control the transmitting means to transmit the system sensitive data at new points in time different from the predetermined points in time, instead of at said predetermined points in time, to reduce the risk of interference from a second system operating in the same frequency range as the first cellular communications system.
    • 可以通过在第一蜂窝通信系统中使用的通信单元(RBS1.M1)来处理在频域中工作的通信系统和发送影响频率区域的脉冲的另一系统之间的干扰的影响,其中至少 一种类型的系统敏感数据在预定的时间点发送,所述通信单元包括被布置为发送所述系统敏感数据的发送装置(14,24)和被布置为控制发送装置的处理装置(11,21) 在不同于预定时间点的新的时间点而不是在所述预定时间点上传送系统敏感数据,以减少与在与第一蜂窝通信系统相同的频率范围内操作的第二系统的干扰的风险。
    • 10. 发明申请
    • AGGREGATION-NODE SELECTION USING VIRTUAL HUB
    • 使用虚拟集线器进行聚合 - 节点选择
    • WO2014158063A1
    • 2014-10-02
    • PCT/SE2013/050343
    • 2013-03-27
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    • AXNÄS, JohanBALACHANDRAN, KumarHUI, Dennis
    • H04L12/721H04W40/24
    • H04W40/04H04L45/123H04W40/24H04W72/04
    • The proposed technology generally relates to route determination and routing in a multi-hop network, More specifically, it provides for a method for route determination in a multi-hop network comprising a number of nodes, 11, whereof at least two nodes are target nodes, 12. The method comprises the steps of: including, S1, in the multi-hop network, a fictitious node, the fictitious node, 15, being defined to have fictitious links to at least two of the target nodes, determining,S2, at least part of one or more extended routes for connecting one or more of the nodes comprised in the multi- hop network, to the fictitious node and determining, S3, at least a part of a route in the multi-hop network, using the at least part of one or more extended routes. One aspect of the proposed technology relates to a method and device for route determination in a multi-hop network having several gateways or aggregation nodes for connecting to a communication network, a method and device for routing in a multi-hop network as well as a corresponding device and computer program. The proposed technology also relates to an aggregation node and to a method in an aggregation node.
    • 所提出的技术通常涉及多跳网络中的路由确定和路由,更具体地,它提供了一种用于在多跳网络中的路由确定的方法,其包括多个节点11,其中至少两个节点是目标节点 该方法包括以下步骤:在多跳网络中,包括虚拟节点,虚拟节点15被定义为具有至少两个目标节点的虚拟链路,确定S2, 用于将包括在所述多跳网络中的一个或多个节点连接到所述虚拟节点的一个或多个扩展路由的至少一部分,以及使用所述多跳网络中的路由的至少一部分来确定所述多跳网络中的路由的至少一部分 至少部分一个或多个扩展路由。 所提出的技术的一个方面涉及一种具有多个网关或聚合节点的多跳网络中用于路由确定的方法和装置,用于连接到通信网络,用于在多跳网络中路由的方法和设备,以及 相应的设备和计算机程序。 所提出的技术还涉及聚合节点和聚合节点中的方法。