Patents by Inventor Pingbo LIU

Pingbo LIU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Single-carrier quadrature amplitude modulation (SC-QAM) downstream channel fast pre-scanning
    Patent number: 11930445
    Abstract: A network device for providing single-carrier quadrature amplitude modulation (SC-QAM) downstream channel fast pre-scanning. An orthogonal frequency-division multiplexing (OFDM) downstream (DS) channel scan in a foreground process and a single-carrier quadrature amplitude modulation (SC-QAM) DS channel scan in a background process are simultaneously performed. When a first OFDM downstream channel is locked onto, OFDM downstream channel is paused while scanning for SC-QAM downstream channels continues. SC-QAM DS channels identified in the background process are stored in a table. Based on a scan of all OFDM channels and failure to lock onto any OFDM DS channels, the SC-QAM DS channel scan in the background process is stopped and a normal SC-QAM DS channel scan is started. SC-QAM DS channels in the table are scanned first to provide fast pre-scanning. A modem becomes operational with a qualified SC-QAM DS channel obtained from the table.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: March 12, 2024
    Assignee: ARRIS ENTERPRISES LLC
    Inventors: Xing Feng, Jinji Guo, Pingbo Liu, Feng Li
  • SINGLE-CARRIER QUADRATURE AMPLITUDE MODULATION (SC-QAM) DOWNSTREAM CHANNEL FAST PRE-SCANNING
    Publication number: 20220312302
    Abstract: A network device for providing single-carrier quadrature amplitude modulation (SC-QAM) downstream channel fast pre-scanning. An orthogonal frequency-division multiplexing (OFDM) downstream (DS) channel scan in a foreground process and a single-carrier quadrature amplitude modulation (SC-QAM) DS channel scan in a background process are simultaneously performed. When a first OFDM downstream channel is locked onto, OFDM downstream channel is paused while scanning for SC-QAM downstream channels continues. SC-QAM DS channels identified in the background process are stored in a table. Based on a scan of all OFDM channels and failure to lock onto any OFDM DS channels, the SC-QAM DS channel scan in the background process is stopped and a normal SC-QAM DS channel scan is started. SC-QAM DS channels in the table are scanned first to provide fast pre-scanning. A modem becomes operational with a qualified SC-QAM DS channel obtained from the table.
    Type: Application
    Filed: September 18, 2020
    Publication date: September 29, 2022
    Inventors: Xing FENG, Jinji GUO, Pingbo LIU, Feng LI