Patents Assigned to Park Air Systems Limited
  • SIMULTANEOUS CALL TRANSMISSION DETECTION
    Publication number: 20190199462
    Abstract: A method of determining the presence of a secondary carrier signal in a time-domain sum-signal including a primary carrier signal is disclosed, the method comprising: transforming the sum-signal into the frequency domain; extracting at least one peak corresponding to a heterodyne tone from the transformed sum-signal; determining the presence of a secondary carrier signal in the sum-signal based on said at least one peak. A corresponding apparatus is also disclosed.
    Type: Application
    Filed: February 27, 2019
    Publication date: June 27, 2019
    Applicant: Park Air Systems Limited
    Inventors: Desmond Keith PHILLIPS, Paul Andrew Noble
  • Simultaneous call transmission detection
    Patent number: 10263721
    Abstract: A method of determining the presence of a secondary carrier signal in a time-domain sum-signal including a primary carrier signal is disclosed, the method comprising: transforming the sum-signal into the frequency domain; extracting at least one peak corresponding to a heterodyne tone from the transformed sum-signal; determining the presence of a secondary carrier signal in the sum-signal based on said at least one peak. A corresponding apparatus is also disclosed.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: April 16, 2019
    Assignee: Park Air Systems Limited
    Inventors: Desmond Keith Phillips, Paul Andrew Noble