Patents by Inventor Juha Karna

Juha Karna 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 of receiving spread spectrum signal, and receiver
    Publication number: 20060126703
    Abstract: A receiver for receiving a spread spectrum signal, including mechanisms for receiving a combination signal including a user signal spread with the user's spreading code, mechanisms for correlating the received combination signal for observing correlation between the user's spreading code and spreading codes used in the combination signal, mechanisms for regenerating the user signal using a user signal estimate and the user's spreading code, wherein the receiver includes mechanisms for providing the user's spreading code synchronously to the mechanisms for correlating and the mechanisms for regenerating.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 15, 2006
    Applicant: Nokia Corporation
    Inventor: Juha Karna
  • Method of receiving spread spectrum signal, and receiver
    Patent number: 7023903
    Abstract: A receiver for receiving a spread spectrum signal, comprising means for receiving a combination signal comprising a user signal spread with the user's spreading code, means for correlating the received combination signal for observing correlation between the user's spreading code and spreading codes used in the combination signal, means for regenerating the user signal by means of a user signal estimate and the user's spreading code, wherein the receiver comprises means for providing the user's spreading code synchronously to the means for correlating and the means for regenerating.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: April 4, 2006
    Assignee: Nokia Corporation
    Inventor: Juha Kärnä
  • Data transmission method and a radio system
    Patent number: 6625138
    Abstract: The invention relates to a data transmission method used in a CDMA-type radio system. A base station and terminal equipments exchange data at least in a packet switched mode, and a terminal equipment transmits to the base station on a random access channel a random access signal comprising at least a preamble (100) and a data part (102) multiplied by a spreading code. A predetermined set of spreading codes and signature sequences (104) are stored in the terminal equipment, and each signature sequence (104) determines one spreading code. The terminal equipment selects one signature sequence (104) by a random process from the set of signature sequences and adds the selected signature sequence (104) to the preamble (100) of the random access signal. Further, the terminal equipment uses the spreading code corresponding to the selected signature sequence (104) in the data part (102) of the random access signal.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: September 23, 2003
    Assignee: Nokia Corporation
    Inventors: Juha Kärnä, Antti Toskala, Pekka Soininen, Kari Kalliojärvi, Ari Hottinen, Risto Wichman
  • Data transmission method and a radio system
    Patent number: 6594248
    Abstract: The invention relates to a data transmission method used in a CDMA-type radio system. A base station and terminal equipments exchange data at least in a packet switched mode, and a terminal equipment transmits to the base station on a random access channel a random access signal comprising at least a preamble (100) and a data part (102) multiplied by a spreading code. A predetermined set of spreading codes and signature sequences (104) are stored in the terminal equipment, and each signature sequence (104) determines one spreading code. The terminal equipment selects one signature sequence (104) by a random process from the set of signature sequences and adds the selected signature sequence (104) to the preamble (100) of the random access signal. Further, the terminal equipment uses the spreading code corresponding to the selected signature sequence (104) in the data part (102) of the random access signal.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: July 15, 2003
    Assignee: Nokia Corporation
    Inventors: Juha Kärnä, Antti Toskala, Pekka Soininen, Kari Kalliojärvi, Ari Hottinen, Risto Wichman
  • Method of receiving spread spectrum signal, and receiver
    Publication number: 20020196841
    Abstract: A receiver for receiving a spread spectrum signal, comprising means for receiving a combination signal comprising a user signal spread with the user's spreading code, means for correlating the received combination signal for observing correlation between the user's spreading code and spreading codes used in the combination signal, means for regenerating the user signal by means of a user signal estimate and the user's spreading code, wherein the receiver comprises means for providing the user's spreading code synchronously to the means for correlating and the means for regenerating.
    Type: Application
    Filed: June 14, 2002
    Publication date: December 26, 2002
    Inventor: Juha Karna
  • Data transmission method and a radio system
    Publication number: 20020114297
    Abstract: The invention relates to a data transmission method used in a CDMA-type radio system. A base station and terminal equipments exchange data at least in a packet switched mode, and a terminal equipment transmits to the base station on a random access channel a random access signal comprising at least a preamble (100) and a data part (102) multiplied by a spreading code. A predetermined set of spreading codes and signature sequences (104) are stored in the terminal equipment, and each signature sequence (104) determines one spreading code. The terminal equipment selects one signature sequence (104) by a random process from the set of signature sequences and adds the selected signature sequence (104) to the preamble (100) of the random access signal. Further, the terminal equipment uses the spreading code corresponding to the selected signature sequence (104) in the data part (102) of the random access signal.
    Type: Application
    Filed: October 9, 2001
    Publication date: August 22, 2002
    Applicant: Nokia Telecommunications Oy
    Inventors: Juha Karna, Antti Toskala, Pekka Soininen, Kari Kalliojarvi, Ari Hottinen, Risto Wichman