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    PREFILTERING IN MIMO RECEIVER
    3.
    发明公开
    PREFILTERING IN MIMO RECEIVER 有权
    预过滤在MIMO接收机

    公开(公告)号：EP2745427A4

    公开(公告)日：2015-11-25

    申请号：EP12879310

    申请日：2012-06-18

    Applicant: ERICSSON TELEFON AB L M

    Inventor： SAHLIN HENRIK ,  LOPEZ MIGUEL

    IPC: H04B7/04 ,  H04B7/08 ,  H04L25/02 ,  H04L25/03

    CPC classification number: H04B1/40 ,  H04B7/0413 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/0246 ,  H04L25/03 ,  H04L25/03891 ,  H04L2025/03426

    Abstract: Data signals transmitted by a plurality of transmitting antennas over a radio channel are demodulated. The method comprises receiving (202) on a plurality of receiving antennas, a data signal and a reference signal, the contents of the reference signal being known a priori to the receiver. The contents of the reference signal are used for calculating (204) an estimated polynomial channel matrix. A polynomial pre-filter matrix is calculated (206, 208) by a decomposition of the estimated polynomial channel matrix into a product of a paraunitary polynomial matrix and an upper triangular polynomial matrix with minimum phase filters on its main diagonal, where the polynomial pre-filter matrix is obtained by calculating the paraconjugate of the paraunitary polynomial matrix. The received data signal is demodulated (212) where the received data signal is multiplied with the calculated polynomial pre-filter matrix.

    METHOD FOR DETECTION OF EPDCCH USING DMRS QUALITY MEASURE
    4.
    发明公开
    METHOD FOR DETECTION OF EPDCCH USING DMRS QUALITY MEASURE 审中-公开
    用DMRS质量测量检测EPDCCH的过程

    公开(公告)号：EP3044896A4

    公开(公告)日：2016-08-24

    申请号：EP13893552

    申请日：2013-09-13

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WERNER KARL ,  SAHLIN HENRIK

    IPC: H04L5/00 ,  H04L1/00 ,  H04L25/02

    CPC classification number: H04W72/042 ,  H04L1/0046 ,  H04L1/0061 ,  H04L1/0072 ,  H04L5/0051 ,  H04L5/0053 ,  H04L25/0224 ,  H04L25/0232 ,  H04W72/085

    Abstract: The present invention relates to a receiver circuitry and an evaluation method in a receiver circuitry for controlling a decoding of a plurality of control channel message candidates by selecting control channel message candidates based on a quality measure control channel message candidates for decoding of a received control channel message (S150). The quality measure is computed for a DMRS candidate based on an extracted signal sequence and a calculated DMRS sequence (S140).

    Abstract translation: 本发明涉及一种接收机电路中的接收机电路和评估方法，该接收机电路用于通过基于用于解码所接收的控制信道的质量测量控制信道候选来选择控制信道消息候选来控制多个控制信道消息候选的解码 消息（S150）。 基于提取的信号序列和计算的DMRS序列，对DMRS候选计算质量度量（S140）。

    ENHANCED USE OF FREQUENCY SPECTRUM IN A WIRELESS COMMUNICATION NETWORK
    7.
    发明申请
    ENHANCED USE OF FREQUENCY SPECTRUM IN A WIRELESS COMMUNICATION NETWORK 审中-公开
    在无线通信网络中增强频率频谱的使用

    公开(公告)号：WO2013004283A8

    公开(公告)日：2013-12-27

    申请号：PCT/EP2011061176

    申请日：2011-07-04

    Applicant: ERICSSON TELEFON AB L M ,  SAHLIN HENRIK ,  PERSSON ANDERS ,  ENGDAL DAVID ,  WANG YI-PIN ERIC

    Inventor： SAHLIN HENRIK ,  PERSSON ANDERS ,  ENGDAL DAVID ,  WANG YI-PIN ERIC

    IPC: H04W24/10 ,  H04L5/14 ,  H04W72/12

    CPC classification number: H04W24/08 ,  H04L1/0026 ,  H04L1/0027 ,  H04W24/10 ,  H04W72/1226

    Abstract: The present invention relates to a user terminal (1) arranged for communication with at least one node (2) in a wireless communication network (3). The user terminal (1) is arranged to measure received signal characteristics from at least one other user terminal (4, 5) when it is transmitting signals (6, 7; 8, 9). The measured received signal characteristics are comprised in measurement data. The user terminal (1) is arranged to transfer the measurement data to said node (2) at certain times. The present invention also relates to a node (2) that is arranged to schedule transmission and reception of signals such that each user terminal (1, 4, 5) that communicates via the node (2) either transmits or receives signals to/from the node (2) at a first frequency interval. The node (2) is arranged to transmit and receive signals simultaneously at the first frequency interval. The present invention also relates to a method.

    Abstract translation: 本发明涉及一种用于在无线通信网络（3）中与至少一个节点（2）通信的用户终端（1）。 用户终端（1）被布置成在发送信号（6,7,8,9）时测量来自至少一个其他用户终端（4,5）的接收信号特性。 测量的接收信号特性包含在测量数据中。 用户终端（1）被布置成在某些时间将测量数据传送到所述节点（2）。 本发明还涉及一种节点（2），其被布置成调度信号的发送和接收，使得经由节点（2）进行通信的每个用户终端（1,4,5）向/从所述节点 节点（2）以第一频率间隔。 节点（2）被布置成以第一频率间隔同时发送和接收信号。 本发明还涉及一种方法。

    METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM FOR PRODUCING SIGNAL STRUCTURE WITH CYCLIC PREFIX
    9.
    发明申请
    METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM FOR PRODUCING SIGNAL STRUCTURE WITH CYCLIC PREFIX 审中-公开
    用于生成具有循环前缀的信号结构的无线通信系统中的方法和安排

    公开(公告)号：WO2009151358A8

    公开(公告)日：2010-01-28

    申请号：PCT/SE2008050712

    申请日：2008-06-13

    Applicant: ERICSSON TELEFON AB L M ,  LARSSON PETER ,  SAHLIN HENRIK

    Inventor： LARSSON PETER ,  SAHLIN HENRIK

    IPC: H04L27/26

    CPC classification number: H04L27/2607 ,  H04L1/0079 ,  H04L27/2662

    Abstract: The present invention relates to methods and arrangements in a wireless communication system supporting cyclic-prefix insertion, using a symbol sequence comprising a number of samples for transmission over a radio channel that enables the handling of very large signal delay spreads. The symbol sequence is built up by a first symbol with CP and a second symbol with CP. The second symbol is a copy of the first symbol with the samples shifted in a way that makes the two adjacent symbols with CP match in regards to the sample order. The symbol sequence may also comprise a third symbol with CP or more, where the third symbol is a copy of the second symbol and with the samples shifted in analogy with the symbol shift described above. The resulting symbol sequence will thus appear as an extended continuous symbol thanks to the precise cyclic shift that matches adjacent symbols. This allows the receiver to place its FFT window anywhere during the extended symbol, e.g. at the end of the symbol sequence thus making it possible to handle a delay spread longer than the CP duration. It also allows to place e.g. two FFT windows and to combine the extracted signal into one SNR improved signal, while still handling a longer delay spread.

    Abstract translation: 本发明涉及一种支持循环前缀插入的无线通信系统中的方法和装置，其使用包括多个样本的符号序列，以在能够处理非常大的信号延迟扩展的无线电信道上进行传输。 符号序列由具有CP的第一个符号和带有CP的第二个符号构成。 第二个符号是第一个符号的副本，其中样本以使得具有CP的两个相邻符号与样本顺序匹配的方式移位。 符号序列还可以包括具有CP或更多的第三符号，其中第三符号是第二符号的副本，并且样本类似于上述符号移位移位。 因此，由于符合相邻符号的精确循环移位，所得到的符号序列因此将显示为扩展的连续符号。 这允许接收机将其FFT窗口放置在扩展符号期间的任何地方。 因此在符号序列结束时，可以处理长于CP持续时间的延迟扩展。 它也允许放置例如。 两个FFT窗口，并将提取的信号组合成一个SNR改进的信号，同时仍处理更长的延迟扩展。

    PREFILTER DESIGN BY SPECTRAL FACTORIZATION
    10.
    发明申请
    PREFILTER DESIGN BY SPECTRAL FACTORIZATION 审中-公开
    基于谱分解的前置设计

    公开(公告)号：WO0233923A3

    公开(公告)日：2002-08-01

    申请号：PCT/SE0102262

    申请日：2001-10-16

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDBOM LARS ,  SAHLIN HENRIK

    IPC: H04L25/03 ,  H04L27/00

    CPC classification number: H04L25/03038 ,  H04L2025/0356 ,  H04L2025/03605

    Abstract: A baseband signal processing method for calculating a minimum phase version of a channel estimate using spectral factorization is disclosed. The method provides for a low complexity implementation of prefilters. The prefilter does not color the signal and operates as an allpass filter. Additionally, methods are described for constructing prefilters for equalization in both the forward and backward direction.

    Abstract translation: 公开了一种基带信号处理方法，用于使用频谱分解计算信道估计的最小相位版本。 该方法提供了预滤器的低复杂度实现。 预滤器不着色信号并作为全通滤波器运行。 另外，描述了用于在前向和后向构建用于均衡的预滤波器的方法。

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