Demodulation reference signal having a reduced overhead

    公开(公告)号:US11424884B2

    公开(公告)日:2022-08-23

    申请号:US17033656

    申请日:2020-09-25

    Abstract: An apparatus for wireless communication transmits a demodulation reference signal (DMRS) for at least eight orthogonal DMRS ports in a single symbol of at least one slot. The apparatus also transmits data in the at least one slot. The apparatus may correspond to a base station transmitting DMRS and downlink data. The apparatus may correspond to a user equipment (UE) transmitting DMRS and uplink data. The apparatus may bundle the DMRS across multiple slots with a bundled DMRS including a first set of the DMRS ports in a first single symbol of a first slot and a second set of the DMRS ports in a second single symbol of a second slot. The apparatus may transmit the DMRS in only a single slot in a physical resource block group (PRG) including two or more resource blocks using four frequency domain orthogonal cover codes (FD-OCC) and a frequency offset pattern.

    Antenna correlation feedback for partial reciprocity

    公开(公告)号:US11350269B2

    公开(公告)日:2022-05-31

    申请号:US17021704

    申请日:2020-09-15

    Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for the establishment of a communication link between a base station and a user equipment (UE). The UE may have a spatial partial reciprocity capability. The UE may be configured to determine antenna cross-correlation information for at least a first subset of antenna elements in the UE. The cross-correlation information may include one or more correlation parameters (e.g., correlation coefficients), a correlation model, or both. The UE may transmit sounding reference signals for a second set of antenna elements in accordance with the spatial partial reciprocity capability. The UE may also transmit an indication of the cross-correlation information for at least the first subset of antenna elements of the UE. The base station may use such information to derive correlation parameters for the unsounded antennas and determine precoders for downlink communications.

    GUARD BANDS FOR RESOURCE BLOCK SETS OF FULL DUPLEX SLOT CONFIGURED BANDWIDTH PARTS

    公开(公告)号:US20220086029A1

    公开(公告)日:2022-03-17

    申请号:US17470914

    申请日:2021-09-09

    Abstract: Systems and methods providing guard bands for resource blocks of full duplex slot configured bandwidth parts (BWPs) are described. One or more guard bands of an intra-cell guard band allocation with respect to a full duplex BWP configuration may be determined using a full duplex guard band message containing information regarding guard bands between RB sets of a BWP when used in a full duplex slot configuration. Additionally or alternatively, one or more guard bands of an intra-cell guard band allocation with respect to a full duplex BWP configuration may be determined using half duplex guard band messages containing information regarding guard bands between RB sets of a BWP when used in a corresponding half duplex slot duplex configuration. Other aspects and features are also claimed and described.

    BANDWIDTH PART SWITCHING TECHNIQUES FOR WIRELESS COMMUNICATIONS SYSTEMS

    公开(公告)号:US20210321409A1

    公开(公告)日:2021-10-14

    申请号:US17224734

    申请日:2021-04-07

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit, to a base station, a control message indicating a capability of the UE to operate in a full duplex mode on a single carrier in an unpaired radio frequency spectrum. The UE may receive, from the base station, control signaling indicating a default bandwidth part associated with the full duplex mode or a half-duplex mode based at least in part on the control message. The UE and the base station may communicate using an active bandwidth part. The UE and the base station may then communicate, based on an expiration of an inactivity timer associated with the active bandwidth part, using the default bandwidth part in accordance with the full duplex mode/ or the half-duplex mode.

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