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    Technique for precoding a radio transmission
    1.
    发明授权
    Technique for precoding a radio transmission 有权

    公开(公告)号：US12015458B2

    公开(公告)日：2024-06-18

    申请号：US17634084

    申请日：2019-08-09

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Mohammadreza Malek Mohammadi ,  Karl Werner ,  Niklas Jaldén

    IPC分类号： H04B7/0456 ,  H04B7/06

    CPC分类号： H04B7/0456 ,  H04B7/0632

    摘要： A technique for transmitting on a multiple-input channel from a transmitting device to at least one receiving device is described. As to a method of the technique, a quality of a channel estimate of the multiple-input channel from the transmitting device to the at least one receiving device is determined. A transmission on the multiple-input channel from the transmitting device to the at least one receiving device is performed. The transmission is spatially precoded using at least one precoder determined out of a set of precoders. A size of the set of precoders is an increasing or non-decreasing function of the determined quality of the channel estimate.

    Reference signaling for radio access networks
    3.
    发明授权
    Reference signaling for radio access networks 有权

    公开(公告)号：US11616616B2

    公开(公告)日：2023-03-28

    申请号：US17047047

    申请日：2018-04-13

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Karl Werner ,  Lars Lindbom

    IPC分类号： H04L5/00 ,  H04B7/06 ,  H04L1/1829 ,  H04L27/26 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/04

    摘要： There is disclosed a method of operating a signaling radio node in a radio access network, the signaling radio node being adapted for transmitting on a plurality of layers utilizing an antenna arrangement; wherein the method comprises transmitting, on each of the plurality of layers, reference signaling in the same symbol time interval, wherein reference signaling on at least a first layer of the plurality of layers is shifted in time and/or phase relative to reference signaling on at least a second layer of the plurality of layers.
    There are also disclosed related methods and devices.

    Channel-matrix reduction for precoding control
    4.
    发明授权
    Channel-matrix reduction for precoding control 有权

    公开(公告)号：US11616542B2

    公开(公告)日：2023-03-28

    申请号：US17600853

    申请日：2019-04-05

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Mohammadreza Malek-Mohammadi ,  Niklas Jaldén ,  Karl Werner

    IPC分类号： H04B7/04 ,  H04B7/0456

    摘要： A channel matrix representing characteristics of a multi-path channel between a transmitter device (210) equipped with multiple transmitter antennas (211, 212, 213, 214, 215) and a receiver device (220, 230, 240) equipped with multiple receiver antennas (221, 222, 231, 232, 241, 242) is determined. The channel matrix is organized in a first number of channel vectors each associated with a different one of the multiple receiver antennas (221, 222, 231, 232, 241, 242). The channel vectors are combined to a smaller second number of linear combinations of the channel vectors and a reduced channel matrix is composed from the linear combinations of the channel vectors. A precoding matrix is determined based on the reduced channel matrix, and multi-antenna transmission by the transmitter device is controlled based on the determined precoding matrix.

    CSI reference signaling in LTE/NR coexistence
    5.
    发明授权
    CSI reference signaling in LTE/NR coexistence 有权

    公开(公告)号：US11502796B2

    公开(公告)日：2022-11-15

    申请号：US16972194

    申请日：2018-06-05

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Karl Werner ,  Robert Baldemair ,  Håkan Björkegren

    IPC分类号： H04W4/00 ,  H04L5/00

    摘要： A method of operating a network node in a NR radio access network includes transmitting channel state information reference signaling, CSI-RS, the CSI-RS having a CSI-RS pattern in frequency domain over a range of subcarriers including a reference subcarrier, wherein in a first frequency range below the reference subcarrier, the CSI-RS pattern includes a first sub-pattern represented by a repeated flush arrangement of a pattern element covering a number NP of subcarriers, and in a second frequency range above the reference subcarrier, the CSI-RS pattern includes a second sub-pattern represented by a repeated flush arrangement of the pattern element, wherein the first sub-pattern and the second sub-pattern are separated in frequency domain by an interrupting pattern having a number NI of subcarriers, wherein NI> 0 and NI is different from NP. The disclosure also pertains to related methods and devices.

    Demodulation reference signaling in LTE/NR coexistence
    6.
    发明授权
    Demodulation reference signaling in LTE/NR coexistence 有权

    公开(公告)号：US11438118B2

    公开(公告)日：2022-09-06

    申请号：US17049125

    申请日：2018-06-05

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Robert Baldemair ,  Håkan Björkegren ,  Karl Werner

    IPC分类号： H04W72/04 ,  H04L5/00

    摘要： There is disclosed a method of operating a network node (100) in a NR radio access network, the method comprising transmitting demodulation reference signaling, DM-RS, associated to downlink channel signaling, the DM-RS having a DM-RS pattern in frequency domain over a range of subcarriers including a reference subcarrier, wherein in a first frequency range below the reference subcarrier, the DM-RS pattern comprises a first sub-pattern represented by a repeated flush arrangement of a pattern element covering a number NP of subcarriers, and in a second frequency range above the reference subcarrier, the DM-RS pattern comprises a second sub-pattern represented by a repeated flush arrangement of the pattern element, wherein the first sub-pattern and the second sub-pattern are separated in frequency domain by an interrupting pattern having a number NI of subcarriers, wherein NI>0 and NI is different from NP. The disclosure also pertains to related methods and devices.

    MULTI-SUBCARRIER SYSTEM WITH MULTIPLE NUMEROLOGIES
    8.
    发明申请
    MULTI-SUBCARRIER SYSTEM WITH MULTIPLE NUMEROLOGIES 有权

    公开(公告)号：US20210212064A1

    公开(公告)日：2021-07-08

    申请号：US17203536

    申请日：2021-03-16

    申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

    发明人： Karl Werner ,  Ning He ,  Robert Baldemair

    IPC分类号： H04W72/04 ,  H04L5/00

    摘要： A method of operating a user equipment comprises addressing multi-subcarrier system resources using multiple different numerologies available within a single carrier, the multiple different numerologies comprising a first numerology having resource blocks (RBs) with a first bandwidth and a first subcarrier spacing, Δf1, and a second numerology having RBs with a second bandwidth and a second subcarrier spacing, Δf2, which is different from Δf1, wherein the first numerology is aligned in the frequency domain relative to a frequency reference, Fref, according to m*Δf1+Fref and the second numerology is aligned in the frequency domain relative to the frequency reference, Fref, according to n*Δf2+Fref, where m and n are integers. The method further comprises transmitting and/or receiving information within the single carrier according to the at least one of the multiple different numerologies.