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47 条记录 (耗时 0.049 秒)

    Reference signal channel estimation
    1.
    发明授权
    Reference signal channel estimation 有权

    公开(公告)号：US11411779B2

    公开(公告)日：2022-08-09

    申请号：US16836668

    申请日：2020-03-31

    申请人： XCOM Labs, Inc.

    发明人： Peter John Black ,  Jinghu Chen ,  Jing Jiang ,  Tamer Adel Kadous ,  Wanlun Zhao

    IPC分类号： H04L25/02

    摘要： Aspects of this disclosure relate to reference signal channel estimation. A wireless communication channel between two nodes can be estimated based on a received reference signal, such as a Sounding Reference Signal. Techniques are disclosed to improve performance of reference signal channel estimation and make channel estimates more robust in the presence of one or more of a variety of impairments. Frequency domain processing and/or time domain processing can be performed to reduce distortion in channel estimates.

    ACTIVE SET MANAGEMENT FOR MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATIONS
    2.
    发明申请
    ACTIVE SET MANAGEMENT FOR MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATIONS 有权

    公开(公告)号：US20220200664A1

    公开(公告)日：2022-06-23

    申请号：US17537178

    申请日：2021-11-29

    申请人： XCOM Labs, Inc.

    发明人： Tamer Adel Kadous ,  Michael Mingxi Fan

    IPC分类号： H04B7/024 ,  H04W24/02 ,  H04W72/12 ,  H04B7/0413

    摘要： Aspects of the disclosure relate to an active set management scheme implemented by a scheduler in a multiple-input multiple-output (MIMO) network that minimizes capacity and interference issues. For example, the scheduler can initially group each base station into a separate active set. The scheduler can then analyze each active set to determine whether the active set is a good or bad based on the level of interference in and the number of MIMO receive dimensions available in the respective active set. If the scheduler determines that an active set is a bad, the scheduler can determine a set of metrics that each represent a capacity and link quality that would result if the bad active set is combined with another active set. Based on the set of metrics, the scheduler can combine the bad active set with another active set, and repeat this process until no bad active sets remain.

    Methods and systems of multi-link peer-to-peer communications
    3.
    发明授权
    Methods and systems of multi-link peer-to-peer communications 有权

    公开(公告)号：US11330649B2

    公开(公告)日：2022-05-10

    申请号：US16750589

    申请日：2020-01-23

    申请人： XCOM Labs, Inc.

    发明人： Paul Eric Jacobs ,  Matthew Stuart Grob

    IPC分类号： H04W76/14 ,  H04W76/15

    摘要： Methods and systems of multi-link peer-to-peer communications enable consumer devices to have increased communication performance. A method of communication can include establishing, by a consumer device, a P2P interface with extender devices, transmitting uplink data to the two or more extender devices, and transmitting, by each of the two or more extender devices, uplink transmission data to a cellular network. The method can further include receiving, by the extender devices, downlink transmission data from a respective cellular network, transmitting, by each of the two or more extender devices via the peer-to-peer wireless interface, the received downlink transmission data, and receiving, at the consumer device via the peer-to-peer wireless interface, data related to the received downlink transmission data. In an example, the consumer device can also transmit data directly to a cellular network and receive data directly from the cellular network in parallel with the P2P communication.

    Downlink active set management for multiple-input multiple-output communications
    4.
    发明授权
    Downlink active set management for multiple-input multiple-output communications 有权

    公开(公告)号：US11032841B2

    公开(公告)日：2021-06-08

    申请号：US16395837

    申请日：2019-04-26

    申请人： XCOM Labs, Inc.

    发明人： Tamer Adel Kadous ,  Michael Mingxi Fan

    IPC分类号： H04L12/00 ,  H04W72/12 ,  H04W24/02 ,  H04B7/0413 ,  H04B7/024

    摘要： Aspects of the disclosure relate to an active set management scheme implemented by a scheduler in a multiple-input multiple-output (MIMO) network that minimizes capacity and interference issues. For example, the scheduler can initially group each base station into a separate active set. The scheduler can then analyze each active set to determine whether the active set is a good or bad based on the level of interference in and the number of MIMO transmit dimensions available in the respective active set. If the scheduler determines that an active set is a bad, the scheduler can determine a set of metrics that each represent a capacity and link quality that would result if the bad active set is combined with another active set. Based on the set of metrics, the scheduler can combine the bad active set with another active set, and repeat this process until no bad active sets remain.

    TIME-DIVISION DUPLEX MULTIPLE INPUT MULTIPLE OUTPUT CALIBRATION
    5.
    发明申请
    TIME-DIVISION DUPLEX MULTIPLE INPUT MULTIPLE OUTPUT CALIBRATION 有权

    公开(公告)号：US20210014085A1

    公开(公告)日：2021-01-14

    申请号：US16510802

    申请日：2019-07-12

    申请人： XCOM LABS, INC.

    发明人： Jinghu Chen ,  Wanlun Zhao ,  Tamer Adel Kadous ,  Peter John Black ,  Michael Mingxi Fan

    IPC分类号： H04L25/02 ,  H04L5/00 ,  H04L5/14 ,  H04B7/0413 ,  H04B7/06

    摘要： Aspects of this disclosure relate to a time-division duplex (TDD) multiple-input multiple-output (MIMO) system that includes a plurality of nodes. The plurality of nodes collectively includes antennas divided into groups. Reference signals can be transmitted from each group of antennas to one or more other groups of antennas during respective time slots. Channel estimates can be generated based on the received reference signals. The channel estimates can be jointly processed to generate calibration coefficients. Each calibration coefficient can represent a ratio associated with a transmit coefficient and a receive coefficient. Example algorithms for the joint processing are disclosed.

    Downlink user equipment selection
    7.
    发明授权
    Downlink user equipment selection 有权

    公开(公告)号：US10686502B1

    公开(公告)日：2020-06-16

    申请号：US16397954

    申请日：2019-04-29

    申请人： XCOM Labs, Inc.

    发明人： Wanlun Zhao ,  Jinghu Chen ,  Tamer Adel Kadous ,  Michael Mingxi Fan ,  Peter John Black

    IPC分类号： H04B7/04 ,  H04B7/0456 ,  H04B7/0452 ,  H04B17/309 ,  H04B17/382 ,  H04B7/0404

    摘要： Aspects of the disclosure relate to a selection scheme implemented by a scheduler in a multiple-input multiple-output (MIMO) network to identify which users to schedule simultaneously during the same time slot. For downlink communications and a particular frequency wholeband or sub-band, the scheduler can determine downlink channel information using uplink channel information for channels between base stations and UEs. The scheduler can then determine a strength of the channels using the downlink channel information, order the UEs using a fairness metric based on the channel strengths, and compute one or more QR decompositions to identify whether a spatial dimension of a UE is roughly or approximately orthogonal to spatial dimension(s) of other UEs selected to be served during a time slot being scheduled. If the spatial dimensions are roughly or approximately orthogonal, the scheduler selects the UE to be served at the same time as other UEs already selected.