Abstract: According to an embodiment, a mobile extender (82) is provided which may be configured to provide a base unit (81) with an additional uplink via a mobile network like LTE.

Abstract: According to an embodiment, a mobile extender (82) is provided which may be configured to provide a base unit (81) with an additional uplink via a mobile network like LTE.

Abstract: Telecommunication system for bidirectional transmission of data and voice signals with a data network (2), which is connected via a satellite data transmission link (6, 5, 8) for bidirectional data signal transmission to at least one satellite device (7), which is connected to a 10 Base S switching device (14); a telephone network (25), which is connected via a number of subscriber telephone lines (23) for bidirectional voice signal transmission to the 10 Base S switching device (14); and with a number of 10 Base S subscriber modems (18), which are connected for bidirectional voice and data signal transmission to the 10 Base S switching device (14).

Abstract: Digital modem for data exchange between a data distribution unit (2) and at least one receiver (3, 4) which can be connected to the digital modem (1) with: a user-data forward signal path (17) for the transmission of user data from the television-data distribution unit (2) to the receiver (3, 4) over broadband user-data forward transmission channels, a backward signal path (42) for the transmission of television-receiver control data from the receiver (3, 4) to the data distribution unit (2) over narrowband backward transmission channels; and with a control-data forward signal path (27) for the transmission of narrowband control data or user data from the data distribution unit (2) to the receiver (3, 4) over narrowband forward transmission channels, it additionally being possible for broadband user data to be transmitted over the control-data forward signal path (27) from the data distribution unit (2) to the receiver (3, 4).

Abstract: The invention relates to a frequency converter for converting a digital baseband signal (2) having a first frequency (0 Hz) into an analog output signal (8), which is centered around a second frequency (fz, f1+fz, f2+fz), which is switched in rapidly successive frequency jumps, and to a corresponding method. In order to improve the performance of the frequency converter with regard to the rapid switching of the transmission frequency (fz, f1+fz, f2+fz), it is proposed to provide the frequency converter with a digital mixer (9), which transforms the digital baseband signal (2) fed to it to a low intermediate frequency (f1, f2), a D/A converter (3) for converting the baseband signal (4) supplied by the digital mixer (9) into an analog bandpass signal (6), and an analog mixer (7), which transforms the analog bandpass signal (6) with a predetermined constant factor (fz) into a real bandpass signal (8) which is centered around the transmission frequency (fz, f1+fz, f2+fz).

Abstract: Telecommunication system for bidirectional transmission of data and voice signals with a data network (2), which is connected via a satellite data transmission link (6, 5, 8) for bidirectional data signal transmission to at least one satellite device (7), which is connected to a 10 Base S switching device (14); a telephone network (25), which is connected via a number of subscriber telephone lines (23) for bidirectional voice signal transmission to the 10 Base S switching device (14); and with a number of 10 Base S subscriber modems (18), which are connected for bidirectional voice and data signal transmission to the 10 Base S switching device (14).

Abstract: A method for processing signals composed of data symbols that are each separated from one another by a guard interval. Such signals are used for digital television transmission, for example. The guard intervals results in that gaps in the flow of recovered data are produced at the reception end. These gaps are prevented by extending evaluation of the symbols to the duration of the guard interval. This allows an additional buffer store to be dispensed with.

Abstract: Digital modem for data exchange between a data distribution unit (2) and at least one receiver (3, 4) which can be connected to the digital modem (1) with: a user-data forward signal path (17) for the transmission of user data from the television-data distribution unit (2) to the receiver (3, 4) over broadband user-data forward transmission channels,