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    METHOD AND APPARATUS FOR CONTROLLING MULTI-ANTENNA TRANSMISSION IN A WIRELESS COMMUNICATION NETWORK
    2.
    发明公开
    METHOD AND APPARATUS FOR CONTROLLING MULTI-ANTENNA TRANSMISSION IN A WIRELESS COMMUNICATION NETWORK 审中-公开
    方法和装置用于控制多天线传输的无线通信网络

    公开(公告)号：EP2165417A4

    公开(公告)日：2014-01-29

    申请号：EP08767166

    申请日：2008-05-26

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HUI DENNIS ,  KRASNY LEONID

    IPC: H04B7/06 ,  H04B7/04 ,  H04L1/06 ,  H04L25/02 ,  H04L27/26

    CPC classification number: H04B7/0417 ,  H04B7/0426 ,  H04B7/0626 ,  H04L1/0675 ,  H04L25/0206 ,  H04L27/2601

    Abstract: Multi-antenna transmission control presented herein involves generating a set of virtual channel realizations at the transmitter that shares the same second-order statistics as the actual channel realizations observed for a targeted receiver. By making the control-related quantities of interest at the transmitter depend on the long-term statistics of the channel, the actual channel realizations are not needed for transmission control, e.g., for accurate Multiple-Input-Multiple-Output (MIMO) preceding. As such, the use of virtual channel realizations enables transmission control that approaches the "closed-loop" channel capacity that would be provided by full feedback of the (instantaneous) actual channel realizations, without requiring the overhead signaling burden that attends full feedback.

    ROUTE DETERMINATION IN A MULTI-HOP NETWORK USING MULTIPLE ROUTING METRICS
    3.
    发明公开
    ROUTE DETERMINATION IN A MULTI-HOP NETWORK USING MULTIPLE ROUTING METRICS 审中-公开
    路线确定使用多种路由度量标准的多跳网络

    公开(公告)号：EP2923466A4

    公开(公告)日：2016-08-10

    申请号：EP12888807

    申请日：2012-11-26

    Applicant: ERICSSON TELEFON AB L M

    Inventor： AXNÄS JOHAN ,  TULLBERG HUGO ,  BALDEMAIR ROBERT ,  BALACHANDRAN KUMAR ,  HUI DENNIS

    IPC: H04L12/725 ,  H04L12/26 ,  H04L12/721 ,  H04W40/02

    CPC classification number: H04L45/124 ,  H04L43/045 ,  H04W40/02 ,  Y02B60/50 ,  Y02D70/00 ,  Y02D70/22 ,  Y02D70/30

    Abstract: The proposed technology provides a computationally efficient way to find suitable routes under consideration of multiple metrics. The considered multi-hop network is represented by a connected graph having nodes and links interconnecting the nodes. The method comprises the step (S1) of obtaining a value of a reference route between a source node and a destination node in the connected graph according a first routing metric. The method further comprises the step (S2) of modifying, based on the value of the reference route according to the first routing metric, the connected graph by modifying link cost, with respect to a second routing metric, of at least one link in the connected graph. The method also comprises the step (S3) of determining at least part of a route between the source node and the destination node in the modified connected graph, based on the modified link cost, according to the second routing metric.

    METHODS AND DEVICES FOR TRANSMISSION OF SIGNALS IN A TELECOMMUNICATION SYSTEM
    4.
    发明公开
    METHODS AND DEVICES FOR TRANSMISSION OF SIGNALS IN A TELECOMMUNICATION SYSTEM 审中-公开
    用于在电信系统中发送信号的方法和设备

    公开(公告)号：EP2834928A4

    公开(公告)日：2015-08-26

    申请号：EP13773082

    申请日：2013-02-18

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LOPEZ MIGUEL ,  HUI DENNIS

    IPC: H04L23/02 ,  H04J3/02 ,  H04L25/02 ,  H04L27/26

    CPC classification number: H04J3/02 ,  H04L23/02 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2643

    Abstract: Methods and devices for generating training symbols to be transmitted in a radio network are provided for a radio system where multiple users are sharing the same transmission slot. The method involves forming a sequence of training symbols by repeating an initial block of training symbols and for each user rotating the repeated block by a user specific rotation angle. A rotated block is periodically extended in both ends.

    Abstract translation: 提供用于产生要在无线电网络中发送的训练符号的方法和设备用于其中多个用户共享相同传输时隙的无线电系统。 该方法包括通过重复训练符号的初始块并且每个用户通过用户特定的旋转角度来旋转重复的块来形成训练符号序列。 旋转的块在两端周期性地延伸。

    DELAY-DOPPLER CHANNEL RESPONSE DEMODULATION METHOD AND APPARATUS
    6.
    发明公开
    DELAY-DOPPLER CHANNEL RESPONSE DEMODULATION METHOD AND APPARATUS 审中-公开
    方法和装置解调延迟多普勒信道的答案

    公开(公告)号：EP2016728A4

    公开(公告)日：2014-04-23

    申请号：EP07748373

    申请日：2007-04-03

    Applicant: ERICSSON TELEFON AB L M

    Inventor： GUEY JIANN-CHING ,  HAFEEZ ABDULRAUF ,  HUI DENNIS

    IPC: H04L25/02 ,  H04L27/26

    CPC classification number: H04L25/0212 ,  H04L25/022 ,  H04L25/0222 ,  H04L27/2647

    Abstract: A wireless communication device uses a time-invariant delay-Doppler channel response estimate for received signal demodulation. The device provides coherent signal demodulation by accounting for frequency and time selectivity in a land-based mobile communication environment, which arise mainly because of delay and Doppler shifts, respectively. In one embodiment, the wireless communication device includes a channel estimator that estimates channel response in a wireless communication network by estimating a delay-Doppler response of a wireless communication channel to obtain a delay-Doppler channel response estimate and converting the delay-Doppler channel response estimate to a time-varying channel response estimate, e.g., a time-varying frequency or impulse response. The delay-Doppler response may be estimated in a continuous or discrete domain. In one embodiment, the channel estimator includes a delay-Doppler correlator that measures the delay-Doppler response by observing a response of a wireless communication channel to a pilot signal and converting the observed response to a delay-Doppler domain.

    ZERO-FORCING LINEAR BEAMFORMING FOR COORDINATED CELLULAR NETWORKS WITH DISTRIBUTED ANTENNAS
    9.
    发明公开
    ZERO-FORCING LINEAR BEAMFORMING FOR COORDINATED CELLULAR NETWORKS WITH DISTRIBUTED ANTENNAS 审中-公开
    ZERO-FORCING-LINEARSTRAHLFORMUNGFÜRKOORDINIERTE ZELLULARE NETZE MIT VERTEILTEN ANTENNEN

    公开(公告)号：EP2229740A4

    公开(公告)日：2013-12-11

    申请号：EP08705292

    申请日：2008-01-08

    Applicant: ERICSSON TELEFON AB L M

    Inventor： ZANGI KAMBIZ ,  HUI DENNIS

    IPC: H04B7/06 ,  H04B7/04 ,  H04L1/00

    CPC classification number: H04B7/0617 ,  H04B7/024 ,  H04B7/0426 ,  H04B7/0465 ,  H04W52/346

    Abstract: In a distributed antenna system that includes a plurality of transmitters and a controller, a method, performed by the controller, may be characterized by performing dirty-paper coding on downlink transmissions to users based on an order of the users, calculating beamforming vectors to provide that each of the downlink transmissions associated with each of the users does not interfere with other users, and maximizing, based on the calculated beamforming vectors, a data rate subject to a power constraint of the distributed antenna system.

    Abstract translation: 在包括多个发射机和控制器的分布式天线系统中，由控制器执行的方法的特征在于，基于用户的次序对用户的下行链路传输执行脏纸编码，计算波束成形向量以提供 与每个用户相关联的每个下行链路传输不会干扰其他用户，并且基于所计算的波束形成向量，使得经受分布式天线系统的功率约束的数据速率最大化。

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