FREQUENCY DEPENDENT RESIDUAL SIDE BAND CORRECTION

    公开(公告)号:US20240080230A1

    公开(公告)日:2024-03-07

    申请号:US17930403

    申请日:2022-09-07

    CPC classification number: H04L27/04 H04L5/0098 H04L25/03006 H04L2025/03815

    Abstract: A network node may transmit a training signal for a UE on a plurality of sub-carriers, the training signal transmitted via multiple IQ modulators and multiple RF antenna panels and receive a feedback associated with an FDRSB based on the training signal. The network node may apply an FDRSB correction filter to at least one signal to be transmitted to the UE, and the FDRSB correction filter may be based on the feedback received from the UE. The training signal may include at least one tone transmitted on a first subset of sub-carriers of the plurality of sub-carriers, the first subset of sub-carriers being configured symmetric to a second subset of sub-carriers with respect to a center frequency of the plurality of sub-carriers, and the second subset of sub-carriers being free of the at least one tone of the training signal.

    PRECODING PERTURBATION TO ALLOW LARGE ARRAY DIGITAL POST DISTORTION

    公开(公告)号:US20240007142A1

    公开(公告)日:2024-01-04

    申请号:US17810499

    申请日:2022-07-01

    CPC classification number: H04B1/62 H04B7/0456

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for performing wireless communication using digital post distortion, for example, with a large antenna array where the number of transmit antennas may be greater than a number of spatial streams. A transmitting device and a receiving device determine a perturbed precoding matrix based on a precoding perturbation rule. The transmitting device precodes a signal using the perturbed precoding matrix and transmits via the number of antennas greater than the number of spatial streams. The receiving device receives the signal and subtracts non-linearities from the received signal based on a channel estimation using the perturbed precoding matrix over one or more iterations.

    RS PATTERN ASSOCIATED WITH DYNAMIC SPUR DETECTION

    公开(公告)号:US20230318766A1

    公开(公告)日:2023-10-05

    申请号:US17651400

    申请日:2022-02-16

    CPC classification number: H04L5/0048 H04W72/042

    Abstract: A base station may configure a user equipment (UE) with a subset of reference signal (RS) configurations among a set of RS configurations, and transmit a plurality of RSs based on the subset of RS configurations. The RS may be a demodulation RS (DMRS). The plurality of RSs may be configured to span each of the plurality of resource elements (REs) in the active bandwidth part (BWP). The UE may receive the plurality of RSs based on the subset of RS configurations and perform a spur detection based on the plurality of RSs received based on the subset of RS configurations. Each RS configuration of the set of RS configurations may be associated with at least one of the subset of RS configurations that is associated with the plurality of RSs spanning each of the plurality of REs in the active BWP.

    NON-LINEARITY ESTIMATION FOR ENVELOPE TRACKING PA

    公开(公告)号:US20230239092A1

    公开(公告)日:2023-07-27

    申请号:US17648805

    申请日:2022-01-24

    CPC classification number: H04L5/0048 H04L5/0073 H04L5/0067 H04L27/367

    Abstract: A base station may identify one or more signaling messages or pilots usable for identifying a combined PA and ET non-linearity model associated with the base station. The combined PA and ET non-linearity model may be associated with a PA circuitry and an ET circuitry. The PA circuitry and the ET circuitry may be associated with the base station. The base station may transmit, to the UE, and the UE may receive, from the base station, the one or more signaling messages or pilots. The UE may identify a combined PA and ET non-linearity model associated with the base station based on the one or more signaling messages or pilots. The UE may compensate for a distortion in one or more subsequent signals from the base station based on the identified combined PA and ET non-linearity model.

    ENVELOPE TRACKING FOR WIDEBAND SIGNALS USING FILTER BANK PROCESSING

    公开(公告)号:US20230143623A1

    公开(公告)日:2023-05-11

    申请号:US17453800

    申请日:2021-11-05

    CPC classification number: H04W52/52 H04W24/08

    Abstract: Certain aspects of the present disclosure provide techniques for envelope tracking schemes for a node in a wireless communication network. One aspect provides a method for wireless communication by a transmitter device. The method generally includes: combining envelopes associated with subbands of an input signal to be amplified for transmission based on a combination function; amplifying, via an amplifier, the input signal to generate a transmission signal, the input signal being amplified based on a combined envelope signal, representing the combination of the envelopes, received at a supply input of the amplifier; and transmitting the transmission signal to a receiver device.

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