Patents by Inventor Matthias Urs Frey

Matthias Urs Frey 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).

  • Multi-level soft detector-quantizer
    Patent number: 7451174
    Abstract: An analog electronic circuit is proposed that e.g. computes the symbol likelihoods for PAM or QAM signal constellations. The circuit has at least one set of M transistors connected to a common current source. A multiplier/adder generates the voltages to be applied to the transistors from a value y and a set of M expected values in such a way that the currents through the transistors correspond to the likelihood that the value y corresponds to the expected values. The circuit can be used for signal demodulation and various other applications.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: November 11, 2008
    Assignee: Anadec GmbH
    Inventors: Hans-Andrea Loeliger, Matthias Urs Frey, Patrick Peter Merkli