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    Self-interference cancellation in frequency division duplexing system
    1.
    发明授权
    Self-interference cancellation in frequency division duplexing system 有权

    公开(公告)号：US12177169B2

    公开(公告)日：2024-12-24

    申请号：US17142116

    申请日：2021-01-05

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Jin Yuan ,  Khurram Muhammad ,  Gary Xu

    IPC: H04L5/14 ,  H03M1/12 ,  H04B1/44 ,  H04L25/03

    Abstract: A method and an apparatus for self-interference cancellation in a communication device. The communication device includes an antenna configured to transmit a transmit signal and receive a receive signal through a duplexer in FDD communications, a first analog to digital converter (ADC) configured to convert the receive signal from analog to digital, a coupler configured to couple a sample of the transmit signal to a second ADC, which is configured to convert the sample of the transmit signal from analog to digital, and self-interference cancellation circuitry configured to process the digital sample of the transmit signal to generate a self-interference cancellation signal and apply the self-interference cancellation signal to the digital receive signal to cancel an amount of interference induced in the receive signal by the transmit signal. The SIC process provides additional isolation between TX signal and RX signal. The additional isolation could be utilized to relief the isolation requirement for the duplexer, reducing the cost and form factor of the duplexer.

    SYSTEM AND METHOD FOR USER EQUIPMENT ASSISTED OVER-THE-AIR CALIBRATION
    4.
    发明申请
    SYSTEM AND METHOD FOR USER EQUIPMENT ASSISTED OVER-THE-AIR CALIBRATION 有权

    公开(公告)号：US20230067500A1

    公开(公告)日：2023-03-02

    申请号：US17823491

    申请日：2022-08-30

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Jin Yuan ,  Yu Liu ,  Junmo Sung ,  Gang Xu ,  Jianzhong Zhang

    IPC: H04B7/06 ,  H04B7/0417 ,  H04B17/11

    Abstract: A method includes receiving, by a base station, a sounding reference signal (SRS) symbol from a user equipment (UE). The method also includes estimating, by the base station, an uplink (UL) channel from the UE to a full dimensional multiple-input multiple-output (FD-MIMO) base station base band based on the received SRS symbol. The method also includes receiving, by the base station from the UE, an estimate of a downlink (DL) channel from the FD-MIMO base station base band to the UE. The method also includes performing, by the base station, a joint calibration by applying one or more calibration algorithms using channel state information (CSI) of the UL channel and the DL channel.

    HYBRID SELF-INTERFERENCE CANCELATION IN FREQUENCY DIVISION DUPLEXING SYSTEM
    5.
    发明申请
    HYBRID SELF-INTERFERENCE CANCELATION IN FREQUENCY DIVISION DUPLEXING SYSTEM 有权

    公开(公告)号：US20220038133A1

    公开(公告)日：2022-02-03

    申请号：US17383295

    申请日：2021-07-22

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Khurram Muhammad ,  Jin Yuan ,  Xinguang Xu

    IPC: H04B1/525

    Abstract: A communication device includes an antenna configured to receive a signal in a receive band and transmit a signal in a transmit band through a duplexer, analog transmitter-side radio frequency (RF) self-interference cancelation (SIC) circuitry configured to reduce power of the transmit signal in the receive band before input to the antenna, analog receiver-side RF SIC circuitry configured to reduce power of the receive signal in the transmit band before input to a first analog-to-digital converter (ADC) to convert the receive signal from analog to digital, a coupler configured to couple a small part of the transmit signal to a second ADC to convert the transmit signal from analog to digital, and digital SIC circuitry configured to process the digital sample to generate and apply an SIC signal to the digital receive signal to cancel interference induced in the receive signal by the transmit signal.

    METHODS AND APPARATUS FOR CALIBRATION AND ARRAY OPERATION IN ADVANCED MIMO SYSTEM
    6.
    发明申请
    METHODS AND APPARATUS FOR CALIBRATION AND ARRAY OPERATION IN ADVANCED MIMO SYSTEM 审中-公开

    公开(公告)号：US20180254839A1

    公开(公告)日：2018-09-06

    申请号：US15891244

    申请日：2018-02-07

    Applicant: Samsung Electronics Co., Ltd

    Inventor： Jin Yuan ,  Yang Li ,  Gary Xu ,  Robert Monroe ,  Jianzhong Zhang ,  Sridhar Rajagopal

    IPC: H04B17/12 ,  H04B1/40 ,  H04B7/04

    Abstract: A method for a transceiver calibration and antenna array operation in a multi-input multi-output (MIMO) system. The method comprises sending a calibration signal and a pre-designed training sequence, via a coupling network, receiving a calibration signal and a pre-designed training sequence that is sent a the transceiver array in a time slotted pattern via a coupling network, generating an Rx calibration measurement (R1) based on one or more uplink signals received via antenna array and the coupling network, generating a Tx calibration measurement (T1) based on receipt of the calibration signal from each of antennas via the coupling network; and performing a joint Tx/Rx (TRx) calibration based on HR, R1, and T1, where H is a channel response in air interface, R is a channel response of receivers in transceiver array.

    Hybrid GMP/equalizer digital self interference cancelation for MIMO transmitters
    7.
    发明授权
    Hybrid GMP/equalizer digital self interference cancelation for MIMO transmitters 有权

    公开(公告)号：US11750232B2

    公开(公告)日：2023-09-05

    申请号：US17539109

    申请日：2021-11-30

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Matthew Tonnemacher ,  Jin Yuan ,  Chance Tarver ,  Khurram Muhammad

    IPC: H04B1/10 ,  H04B1/3805 ,  H04B1/14

    CPC classification number: H04B1/1036 ,  H04B1/14 ,  H04B1/3805 ,  H04B2001/1045

    Abstract: A base station configured to perform a method for self-interference cancelation (SIC) is provided. The method includes transmitting, by a transceiver configured to transmit an uplink channel and a downlink channel concurrently, one or more signals, the transceiver coupled to, or including, a first number of transmit antennas and a second number of receive antennas. The method also includes, for at least one receive antenna of the second number of receive antennas, applying a forward path model including a non-linear component corresponding to a transmit path in the transceiver, and applying an equalizer function to a first signal to be transmitted by at least one transmit antenna of the first number of transmit antennas determine a self-interference (SI) estimate; and subtracting, in SIC circuitry, the SI estimate from the signal received via at least one receive antenna of the second number of receive antennas to obtain an residual signal.

    MIMO ANTENNA ARRAY FOR CROSS DIVISION DUPLEX
    9.
    发明申请
    MIMO ANTENNA ARRAY FOR CROSS DIVISION DUPLEX 有权

    公开(公告)号：US20220030570A1

    公开(公告)日：2022-01-27

    申请号：US17107567

    申请日：2020-11-30

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Gary Xu ,  Khurram Muhammad ,  Jin Yuan ,  Jianzhong Zhang

    IPC: H04W72/04 ,  H04B7/08 ,  H04B7/0452 ,  H04L5/00

    Abstract: A radio frequency (RF) unit and method of operation of the RF unit are disclosed herein. The RF unit comprises an antenna array, and the antenna array comprises a plurality of antenna elements. A first set of the plurality of antenna elements is configured to operate in a first mode and a second set of the plurality of antenna elements is configured to operate in a second mode. In the first mode, the first set of the plurality of antenna elements is configured to transmit and receive. In the second mode, the second set of the plurality of antenna elements is configured to only receive.

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