Siemens Aktiengesellschaft

Infineon Technologies Ag

Intel Mobile Communications Gmbh

Intel Deutschland Gmbh

Dieter Brueckmann

Christian Kranz

Tobias Scholand

André Neubauer

Michael Speth

Michael Alger-Meunier

Ulrich Boetzel

Yousif Ammar

Gerald Hoefer

Johannes Van Den Boom

Walfried Preuss

Rüdiger Pott

A method for adjusting a transmit power of a multi carrier transmitter in a mobile communication system includes providing at least two data streams, each data stream to be transmitted on a separate carrier frequency, and determining a transmit signal adaptation metric separately for each of the at least two data streams. The method further includes calculating a combined transmit signal adaptation metric based on the separate transmit signal adaptation metrics, combining the two data streams carried on the two carrier frequencies to an overall transmit signal, and adjusting the transmit power of the overall transmit signal based on the calculated combined transmit signal adaptation metric.

Method for adjusting a transmit power of a multi carrier transmitter and a multi carrier transmitter

A detector for zero crossings and a counter which is connected to it are used to determine the time intervals between the zero crossings of the received signal or of an intermediate-frequency signal which is produced from the received signal, and for detection of the digital signal data. In this case, a sequence of determined zero crossing intervals can be stored in digital form in a shift register chain, and can be compared in a classification device with previously stored interval sequences. Furthermore, a frequency offset can be determined by averaging the zero crossing intervals and can be compensated for by suitable selection or modification of the previously stored interval sequences, in which case the latter can also be used during the synchronization phase. The synchronization process may, furthermore, be assisted by payload data identification.

Demodulation of a digitally frequency-modulated analog received signal by evaluation of the time intervals between the zero crossings

A frequency hopping method for a mobile radio system by which the carrier frequency of the base station () and of one or more mobile stations () of the mobile radio system is temporally changed in defined intervals according to a pre-determined frequency hopping scheme. Preferably, certain operational conditions of the mobile radio system are monitored and the frequency hopping scheme is adaptively adjusted according thereto. As a result, during operation, a frequency hopping sequence can be adjusted to the present operational conditions, especially to the influence of possible interfering signal.

Frequency hopping method for a mobile radio telephone system

An apparatus transmits digital signals between a higher-ranking station and one or more subordinate stations through transmission devices. A signal transit time is automatically measured in the transmission devices, differences in transit time are automatically compensated for and useful signals in the various subordinate stations are automatically synchronized with one another.

Apparatus for compensating for signal transit time differences of digital transmission devices

A digital signal processing device includes at least one peripheral unit, a data bus and at least three data registers and a flag register exchanging binary-encoded data with the at least one peripheral unit through the data bus. Two shift registers are each loaded with contents of one of the data registers. Two modification units are each connected downstream stream of a respective one of the shift registers. An arithmetic and logic unit is connected to the modification units. A multiplication register is to be written by the arithmetic and logic unit and through the data bus by the at least one peripheral unit. A logic block controls shift operations of at least one of the two shift registers as a function of contents of the multiplication register. A programmable sequence control is connected to the data registers, the at least one peripheral unit, the arithmetic and logic unit, the flag register, the shift registers, and the modification units.

Digital signal processing device with optimized ALU circuit and logic

A circuit configuration for monitoring a supply voltage of a processor unit being clocked by an oscillator and requiring a minimum supply voltage, includes an undervoltage detector being connected to the processor unit. The undervoltage detector is in operation and generates a reset signal at a supply voltage being in a range between a lower first limit value and a higher second limit value and being below the minimum supply voltage. A comparator is connected to the processor unit. The comparator is in operation at a supply voltage above the second limit value and the comparator generates an activation signal at a supply voltage above a third limit value being above the minimum supply voltage. The oscillator is in operation at a supply voltage above the second limit value and the processor unit is in operation upon the appearance of the activation signal.

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Meerbusch, Germany

Dieter Brueckmann