Patents by Inventor Lars Peter Wahlström

Lars Peter Wahlström 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).

  • Reducing interference in telecommunications systems
    Patent number: 6516199
    Abstract: A cellular network is controlled such that time slots of transmissions from base stations with the same operating frequency are synchronized. Moreover, adjacent base stations using the same frequency are controlled such that, at any given time, they are transmitting different sync words.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: February 4, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jan Erik Söderkvist, Lars Peter Wahlström
  • Telecommunications systems
    Patent number: 6295290
    Abstract: A base station monitors signals received from cochannel interferers, and detects the air frame positions of the interfering transmissions. The base station then adjusts the air frame position of its own transmissions such that it minimizes the possibility of interference with the cochannel interferers.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: September 25, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jan Erik Söderkvist, Lars Peter Wahlström
  • Signal-to-noise ratio determination using digital signal processing
    Patent number: 6181739
    Abstract: Methods and systems for measuring signal noise of supervisory audio tones (SATs) in radiocommunication systems are disclosed. Exemplary embodiments involve extracting a real component from a received SAT signal, removing the SAT signal portion and examining the remainder to determine a noise component present in the SAT. The noise component can be compared with a signal strength measurement to obtain a signal-to-noise ratio.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: January 30, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Omar Ryde, Olof Tomas Backström, Lars Peter Wahlström