Robert Boschgmbh

Tesat-spacecom Gmbh & Co Kg

Bobert Bosch Gmbh

Erich Auer

Heinz Gockler

Thomas Alberty

Hans-Peter Petry

Harald Ansorge

A communication satellite for use in a satellite constellation is provided. The communication satellite includes: a user side interface for wireless receiving and transmitting of data; a network side interface for wireless receiving and transmitting of data; a first inter satellite interface for wireless receiving and transmitting of data having a first radiation direction of electromagnetic waves; a second inter satellite interface for wireless receiving and transmitting of data having a second radiation direction of electromagnetic waves. The first radiation direction has a first radiation angle with respect to a direction of movement of the communication satellite. The second radiation direction has a second radiation angle with respect to the direction of movement of the communication satellite. An absolute value of the first radiation angle corresponds to an absolute value of the second radiation angle.

Communication satellite for a satellite constellation

The disclosure relates to a method for operating a selective switching device for signals, a related selective switching device, and a message transmission system having the selective switching device. An embodiment of the method includes the following steps, not necessarily in this order: determining a current temperature in the region of the selective switching device; determining a signal shift of the selective switching device due to the current temperature; adding the signal shift to an input signal of the selective switching device as to receive a compensated signal for which the signal shift due to the current temperature is compensated; and removing the signal shift from an output signal of the selective switching device as to receive a corrected signal for which the compensation is corrected.

Method for operating a selective switching device for signals

A method and arrangements for extracting a plurality of clock signals for signal-processing circuits, in particular for a digital modem, from a supplied clock signal, for the clock signals to be extracted to be formed in each case from an output signal of an accumulator of predefined bit width n. The accumulator accumulates in each case an increment in the clock pulse of the supplied clock signal and, in the process, performs a modulo2,operation.

Process and device for generating a plurality of derived clock signals

In order to permit flexible allocation of transmission capacities in such a radio transmission system, without interrupting or disturbing existing radio links, provision is made for a control device which, in response to a change of transmission channels in the central station and in the subscriber stations in question, adjusts one or a plurality of transmission parameters so that both the band width of the available radio frequency channel is optimally utilized, and a required resistance to interference is attained in the radio frequency channel. To that end, the modems existing in the central station and in the subscriber stations are equipped with L transmission channels and K receiving channels, of which, in each case, a maximum of L-1 in the transmission direction, and a maximum of K-1 in the receiving direction are activated. In response to a change in the transmission channels with respect to the number of carriers and/or the transmission parameters of the individual carriers, the adjustment to the new transmission parameters is effected in the at least one non-activated transmission channel or receiving channel and, after acquisition of the new transmission parameters has been concluded, a switchover is made to this/these transmission channels or receiving channels.

Point-multipoint radio transmission system

Aerial for a central station of a point-to-multi-point radio link system

A point-to-multiple points signal transmission system includes a central station and several participant stations by which the transmission channels between the central station and the participants can be apportioned as required. The point-to-multiple point wireless transmission system includes a central station and a plurality of participants, the transmission channels being allocable between the central station and the participants as required. The system also includes a plurality of modems and a plurality of transmission channels for transmitting signals between the central station and the participants, the transmission channels being allocable as a function of the transmission requirements. The system further includes a control unit operable to adjust for each respective transmission channel of the send and receive channels, with respect to activated and packet-oriented traffic connections data, at least one of a group of transmission parameters including channel carrier frequency, data rate, modulation, coding, send gauge and indicia of signal quality rating as a function of at least one of the required count and bandwidth of the respective transmission channel and the required resistance of the respective transmission channel.

Growing community of inventors

Besigheim, Germany

Erich Auer