TECHNOLOGIES FOR ACOUSTIC MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) TRANSMISSION THROUGH A SERIAL PERIPHERAL INTERFACE (SPI) BUS

    公开(公告)号:US20230370124A1

    公开(公告)日:2023-11-16

    申请号:US17745019

    申请日:2022-05-16

    申请人: Lehigh University

    IPC分类号: H04B7/0413 H04L27/20

    CPC分类号: H04B7/0413 H04L27/20

    摘要: An acoustic transmission device may communicate sensing data via one or more multiple-input multiple-output (MIMO) transmissions. The device may comprise a serial peripheral interface (SPI) and/or a phase shifting key (PSK) modulator. The device may be configured to provide a first SPI signal, perhaps including one or more coded information bits, to the PSK modulator. The device may provide a second SPI signal, perhaps including a synchronous clock signal, to the PSK modulator. The device may generate of one or more symbols on N transmit branches based on the first SPI signal. The device may generate of at least one carrier frequency with one or more phases to form one or more phased carriers based on the second SPI signal. The device may control a transmission of the sensing data (e.g., video) via the one or more symbols on the N transmit branches on the one or more phased carriers.

    System and Method for Forming Nano-Particles in Additively-Manufactured Metal Alloys

    公开(公告)号:US20180311736A1

    公开(公告)日:2018-11-01

    申请号:US15965266

    申请日:2018-04-27

    IPC分类号: B22F3/105 B22F1/00

    摘要: In some embodiments, a method of producing a metallic article includes providing a metallic powder, selecting a predetermined concentration for a reactive component, providing a controlled atmosphere including the reactive component at the predetermined concentration, and additively manufacturing the metallic article from the metallic powder under the controlled atmosphere. The metallic powder includes a metallic element or metallic alloy. The reactive component reacts with the metallic powder in a weld pool formed during the additive manufacturing to form a dispersion of nano-particles in the weld pool. The nano-particles are dispersed throughout the metallic article in a substantially uniform manner. In some embodiments, the metallic powder includes the reactive component. Metallic articles formed by the disclosed methods are also disclosed.