Patents by Inventor Stefan Allevad

Stefan Allevad 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).

  • Method and device for estimating properties of a telecommunication transmission line
    Patent number: 8290122
    Abstract: A method and device for estimating one or more transmission properties of a telecommunication transmission line. At least one signal is sent on the line, the at least one signal including at least two frequencies for which the absolute value of the line propagation constant times the line length is less than ?, and a resulting signal is received. An estimate of at least one transmission line property is then determined by examining the relationship between the sent and resulting signal or signals. The process may be repeated, if necessary. The estimate determination may also be repeated one or more times, with each successive estimate preferably using for the determination only those frequencies for which, as previously estimated, the absolute value of the line propagation constant times the line length is less than ?.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: October 16, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Allevad, Per Ödling, Antoni Fertner, Henrik Back, Fredrik Lindqvist, Per Ola Börjesson, Jaume Rius i Riu
  • METHOD AND DEVICE FOR ESTIMATING PROPERTIES OF A TELECOMMUNICATION TRANSMISSION LINE
    Publication number: 20090213998
    Abstract: A method and device for estimating one or more transmission properties of a telecommunication transmission line. At least one signal is sent on the line, the at least one signal including at least two frequencies for which the absolute value of the line propagation constant times the line length is less than ?, and a resulting signal is received. An estimate of at least one transmission line property is then determined by examining the relationship between the sent and resulting signal or signals. The process may be repeated, if necessary. The estimate determination may also be repeated one or more times, with each successive estimate preferably using for the determination only those frequencies for which, as previously estimated, the absolute value of the line propagation constant times the line length is less than ?.
    Type: Application
    Filed: October 27, 2005
    Publication date: August 27, 2009
    Inventors: Stefan Allevad, Per Odling, Antoni Fertner, Henrik Back, Fredrik Lindqvist, Per Ola Borjesson, Jaume Rius i Riu