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    TECHNIQUE FOR RADIO CHANNEL ESTIMATION
    4.
    发明申请
    TECHNIQUE FOR RADIO CHANNEL ESTIMATION 审中-公开

    公开(公告)号：US20190229952A1

    公开(公告)日：2019-07-25

    申请号：US15764623

    申请日：2018-01-25

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Wanlu Sun ,  Stefano Sorrentino

    IPC分类号： H04L25/02 ,  H04B7/0413 ,  H04W72/04

    CPC分类号： H04L25/0224 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0868 ,  H04L25/0244 ,  H04W72/0446

    摘要： A technique for determining channel coefficients for a first array of antennas coupled through respective first phase shifters to a first radio chain and a second array of antennas coupled through respective second phase shifters to a second radio chain is described. As to a method aspect of the technique, pairs of first and second phase vectors are applied to the first and second phase shifters, respectively. Each of the pairs defines complementary directional gains at the first and second arrays for receiving reference signals. A channel estimation is performed in each of the first and second radio chains for each of the pairs based on the received reference signals. Based on the channel estimations for each of the pairs, at least one channel coefficient for the antennas in each of the first and second arrays is determined.

    MULTIMODE ANTENNA SYSTEM AND METHODS FOR USE THEREWITH
    6.
    发明申请
    MULTIMODE ANTENNA SYSTEM AND METHODS FOR USE THEREWITH 审中-公开

    公开(公告)号：US20190229432A1

    公开(公告)日：2019-07-25

    申请号：US16373816

    申请日：2019-04-03

    申请人： AT&T Intellectual Property I, L.P.

    发明人： Paul Shala Henry ,  Giovanni Vannucci ,  Thomas M. Willis, III

    IPC分类号： H01Q21/00 ,  H04B1/38 ,  H04B3/52 ,  H01Q13/02 ,  H01Q21/20

    CPC分类号： H01Q21/0006 ,  H01Q13/02 ,  H01Q21/205 ,  H04B1/38 ,  H04B3/52 ,  H04B7/0413

    摘要： In accordance with one or more embodiments, a communication device includes an antenna having a feed point and an aperture. A feedline is coupled to the feed point of the dielectric antenna. A multi-input multi-output (MIMO) transceiver is coupled to feedline, the MIMO transceiver facilitating a transmission of first electromagnetic waves to the feed point of the antenna, wherein the first electromagnetic waves are guided by the feedline, wherein the first electromagnetic waves propagate along the feedline via a plurality of guided wave modes without requiring an electrical return path, wherein the first electromagnetic waves convey first data in accordance with one or more MIMO techniques and wherein the first electromagnetic waves generate first free-space wireless signals at the aperture of the antenna in accordance with the one or more MIMO techniques.

    Downlink-Only Fifth Generation New Radio
    7.
    发明申请
    Downlink-Only Fifth Generation New Radio 审中-公开

    公开(公告)号：US20190223243A1

    公开(公告)日：2019-07-18

    申请号：US16359541

    申请日：2019-03-20

    申请人： Google LLC

    发明人： Jibing Wang ,  Erik Stauffer ,  Aamir Akram

    IPC分类号： H04W76/15 ,  H04W76/00

    CPC分类号： H04W76/15 ,  H04B7/0413 ,  H04B7/0634 ,  H04B17/318 ,  H04W16/28 ,  H04W76/00 ,  H04W84/042

    摘要： In aspects of downlink-only fifth generation new radio, a mobile communication device includes a radio frequency transceiver, a radio frequency receiver, and a processor and memory system to implement a radio control manager application that establishes an LTE anchor link with a base station using the LTE transceiver, establishes a 5G NR downlink from the base station to the mobile communication device using the radio frequency receiver, and manages the 5G NR downlink via an uplink of the LTE anchor link. In another aspect, a mobile communication device estimates channel conditions for a 5G NR downlink, selects a precoding matrix to beamform the 5G NR downlink, and provides an indication of the selected precoding matrix via the LTE anchor link.