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Joachim Hagenauer, Rupert Herzog, Andreas Schmidbauer: Decoding method and decoding device for a CDMA transmission system for demodulating a received signal available in serial code concatenation. Deutsche Telekom, Kenyon & Kenyon, April 23, 2002: US06377610 (161 worldwide citation)

A method and a device for decoding for use in a code-division multiple access (CDMA) transmission system for demodulating a received signal available in serial code concatenation, with a two-step coding being carried out at the transmitting end of the transmission system, including an orthogonal, mu ...


2
Gerhard Fleck, Reinhold Mertens: Method and system for determining dynamic traffic information. DeTeMobil Deutsche Telekom MobilNet, Baker & Maxham, January 4, 2000: US06012012 (123 worldwide citation)

A method and system for determination of dynamic traffic information or traffic events. Relevant data from vehicle-mounted terminals are recorded automatically, by remote interrogation or manually, and transmitted directly, together with a location identifier, via a wide-coverage mobile-telephone ne ...


3
Joerg Schwenk: Method for securing system protected by a key hierarchy. Deutsche Telekom, Kenyon & Kenyon, April 24, 2001: US06222923 (116 worldwide citation)

A method for securing a system protected by a predefined hierarchy of cryptographic keys, and in particular, for securing a pay TV system, against unauthorized users. An individual cryptographic key assigned to a dishonest customer is determined by forming the intersection of at least two predefined ...


4
Werner Hebbecker: Electronic identification tag. Deutsche Telekom, Kenyon & Kenyon, February 17, 2004: US06693544 (108 worldwide citation)

An electronic identification tag or card is indicated, which may be equipped with a rupture joint that has a vertical, diagonal, undulated, zigzag, meander-shaped or other type of design or pattern. The electronic identification tag or card may have two sections which may have a mirror-inverted desi ...


5
Weber Klaus Dipl Ing, Brakemeier Achim Dr Dipl Ing, Rudolph Dietmar Prof Dr Dipl I: Method for transmitting test sequences for radio transmitters. Deutsche Telekom, Telefunken Sendertechnik, April 24, 1996: EP0708546-A2 (74 worldwide citation)

The transmission system has the digital signals to be transmitted used to select successive multi-stage symbols from a defined complex value symbol alphabet. The selected symbols are arranged in line along a time axis, to obtain a pulse sequence weighted by the symbols, which is filtered for reducin ...


6
Juergen Plehn: Process of allocating frequencies to base stations of a mobile radiotelephone network. Detemobil Deutsche Telekom Mobilnet, Spencer & Frank, November 17, 1998: US05839074 (57 worldwide citation)

In a process of allocating frequencies to base stations of a mobile radiotelephone network, which process is based on input information containing at least the number of frequencies required for each base station, the frequencies permissible in the mobile radiotelephone network and information on po ...


7
Andreas Czylwik, Hitoshi Yoshino: Method for co-channel interference cancellation in a multicarrier communication system. Deutsche Telekom, Darby & Darby, January 29, 2008: US07324437 (49 worldwide citation)

A method for cancelling co-channel interference in a multi-carrier communication system includes receiving a serial baseband multi-carrier signal including at least one desired signal and at least one interference signal over at least one receiving branch, and converting the received multi-carrier s ...


8
Axel Susen, Stefan Brock: Method for verifying access authorization for voice telephony in a fixed network line or mobile telephone line as well as a communications network. Deutsche Telekom, Kenyon & Kenyon, April 25, 2006: US07035386 (44 worldwide citation)

A method for verifying access authorization for voice telephony in a fixed network line or mobile telephone line, as well as a communications network having such access authorization verification are described. The access authorization is verified by analysis of a voice signal which was entered by t ...


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Gerd Zimmermann, Henrik Schulze: Method and system for the OFDM multicarrier transmission of digital broadcasting signals. Deutsche Telekom, Kenyon & Kenyon, February 18, 2003: US06522700 (43 worldwide citation)

An improved DAB transmission system with which a higher net data rate can be achieved while maintaining the same system quality, or the same system quality can be achieved with a much lower signal-to-noise ratio on the receiver side at the same net data rate. A symbol mapper is connected directly do ...