Patents by Inventor Vishnu Ratnam

Vishnu Ratnam 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).

  • Patent number: 11259191
    Abstract: A server, method, and computer-readable storage medium for coverage prediction in wireless networks. The server includes a memory storing instructions and a processor operably connected to the memory, which is configured to execute the instructions to cause the server to identify a region of interest (RoI) for the coverage prediction; determine, using a neural network, a set of values for a system performance metric for areas in the RoI, respectively; and generate the coverage prediction for the RoI which associates the areas in the RoI with a determined value in the set of values. The set of values for the system performance metric is determined based on a plurality of data samples for a set of RoIs which include at least one of building height, terrain height, foliage height, clutter data that classifies land cover, line-of-sight indication data, antenna height, and ground truth data for the system performance metric.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: February 22, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hao Chen, Vishnu Ratnam, Young-Han Nam, Joonyoung Cho, Jianzhong Zhang
  • Publication number: 20200169895
    Abstract: A server, method, and computer-readable storage medium for coverage prediction in wireless networks. The server includes a memory storing instructions and a processor operably connected to the memory, which is configured to execute the instructions to cause the server to identify a region of interest (RoI) for the coverage prediction; determine, using a neural network, a set of values for a system performance metric for areas in the RoI, respectively; and generate the coverage prediction for the RoI which associates the areas in the RoI with a determined value in the set of values. The set of values for the system performance metric is determined based on a plurality of data samples for a set of RoIs which include at least one of building height, terrain height, foliage height, clutter data that classifies land cover, line-of-sight indication data, antenna height, and ground truth data for the system performance metric.
    Type: Application
    Filed: November 22, 2019
    Publication date: May 28, 2020
    Inventors: Hao Chen, Vishnu Ratnam, Young-Han Nam, Joonyoung Cho, Jianzhong Zhang
  • Publication number: 20190081659
    Abstract: Systems, methods and apparatus for an optimal achievable performance criterion for a wireless communication system. A method may include determining a joint average channel characteristic for each diversity branch of a plurality of diversity branches. The method may further include determining an optimal size of a first subset of the plurality of diversity branches based on the joint average channel characteristics. The method may further include determining an optimal choice for the first subset based on the joint average channel characteristics. The method may further include determining a number of pilot transmissions required based on the optimal choice of diversity branches for the first subset. The method may further include determining a second subset of the plurality of diversity branches based on instantaneous channel state information.
    Type: Application
    Filed: September 10, 2018
    Publication date: March 14, 2019
    Inventors: Vishnu Ratnam, Andreas Molisch, Hatim Behairy, Faisal Alawwad, Naif Rabeah