USER DETECTION TECHNIQUE, AND METHOD AND APPARATUS FOR CHANNEL ESTIMATION IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MASSIVE MULTIPLE-INPUT MULTIPLE-OUTPUT

    公开(公告)号:US20230164002A1

    公开(公告)日:2023-05-25

    申请号:US17925183

    申请日:2021-05-14

    CPC classification number: H04L25/021 H04L25/0204

    Abstract: Disclosed are a user detection technique, and a method and apparatus for channel estimation in a wireless communication system supporting massive multiple-input multiple-output. The method comprises the steps of: receiving a superimposed signal including a transmission signal of at least one user equipment (UE) from among a plurality of user equipments, wherein each transmission signal includes a pilot signal of a corresponding user equipment; calculating a sample covariance matrix from the received superimposed signal by using the number of antennas of a base station and a pilot signal matrix of the at least one user equipment; calculating a likelihood function indicating the likelihood probability of the received superimposed signal, on the basis of the number of antennas of the base station and the received superimposed signal; detecting a user index set indicating whether or not the plurality of user equipments have transmitted signals, by using the calculated likelihood function and sample covariance matrix; and performing channel estimation of the at least one user equipment that is transmitting the signal, on the basis of the detected user index set.

    EXTRACELLULAR MATRIX-BASED BIOADHESIVE

    公开(公告)号:US20230111780A1

    公开(公告)日:2023-04-13

    申请号:US17936385

    申请日:2022-09-29

    Abstract: An embodiment of the present disclosure provides an extracellular matrix-based bioadhesive as an adhesive in the form of a composition including an extracellular matrix-containing hydrogel and a gelatin curing agent, wherein the extracellular matrix-containing hydrogel is gelatinized. Since the extracellular matrix-based bioadhesive according to an embodiment of the present disclosure has the same or similar rheological properties as gelatin, the bioadhesive has flowability at a temperature of 30° C. or higher and may be evenly and easily applied to a lesion site in the body. In addition, the extracellular matrix-based bioadhesive according to an embodiment of the present disclosure may adhere well to the lesion site because of a level of adhesive strength that is about 2 to 6 times higher than that of fibrin glue used as a commercial tissue adhesive. In addition, the extracellular matrix-based bioadhesive according to an embodiment of the present disclosure is based on a tissue-derived extracellular matrix, and thus includes a tissue-derived wound healing component or a tissue regeneration component, and may be used for wound healing or tissue regeneration in addition to bioadhesive applications.

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