Detection and Prevention of Intermodulation Products above Electromagnetic Compatibility (EMC) Levels for Power Line Communication (PLC) Devices

    公开(公告)号:US20170155426A1

    公开(公告)日:2017-06-01

    申请号:US15196919

    申请日:2016-06-29

    Inventor: Jose ABAD MOLINA

    CPC classification number: H04B3/54

    Abstract: The present disclosure is directed to systems, apparatuses, and methods for monitoring the frequency spectrum of signals transmitted by a PLC device over a PLC network to detect and correct potential EMC regulation violations due to intermodulation (IMD) products created by the interaction of the transmitted signals with one or more non-linear devices on the PLC network. Once an IMD issue is detected, the systems, apparatuses, and methods can reduce the injected power of signals transmitted by the PLC device at the frequencies (or range of frequencies) that result in a EMC regulation violation. In addition, the systems, apparatuses, and methods can reduce the injected power of signals transmitted by the PLC device at all times or during times that the non-linear devices are interacting and generating IMD products.

    Data and pilot sub-carrier or tone design for OFDM/OFDMA in wireless communications

    公开(公告)号:US09634875B2

    公开(公告)日:2017-04-25

    申请号:US14736517

    申请日:2015-06-11

    Inventor: Ron Porat

    Abstract: A wireless communication device (alternatively, device) includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other wireless communication device(s) and to generate and process signals for such communications. A device is configured to generate various orthogonal frequency division multiplexing (OFDM) and/or orthogonal frequency division multiple access (OFDMA) packets (e.g., frames, signals, etc.) that are based on any of a group of set of OFDM/A frame structures. Across the various OFDM/A frame structures, the ratio of pilot sub-carriers to data sub-carriers across resource units (RUs) of decreases as the total number of sub-carriers across the RUs increases. In addition, some of the OFDM/A frame structures include different total number of sub-carriers yet same number of pilot sub-carriers. The device is configured to perform adaptation among and between the various OFDM/A frame structures based on any one or more considerations.

Patent Agency Ranking