Abstract: The present invention relates to a satellite communications system comprising a satellite with a spatial digital modulator for transmitting an incoming bit stream in multiple beams, wherein the spatial digital modulator is configured to generate transmit symbols by dividing the incoming bit stream into symbols of a symbol alphabet and to allocate each transmit symbol to a specific beam. The invention further relates to a method for transmitting a bit stream by such a satellite communications system.

Abstract: A method for connecting an end device to a linkable computer infrastructure is provided. A device certificate is created and supplied to a user of the end device. The device certificate is input into the end device. A data link from the end device to an access zone connected upstream of functions of the linkable computer infrastructure is produced. The access zone may be selectively separated from the functions of the linkable computer infrastructure by this link. The end device is registered in the access zone using the device certificate. By access of a function from the linkable computer infrastructure to the end device registered in the access zone, this end device is identified for the linkable computer infrastructure. With successful identification of the end device, use of the linkable computer infrastructure is enabled for the end device.

Abstract: The invention relates to a method for operating a communication system, the communication system comprising at least two separate transmitting antennas located on Earth and at least two receive antennas located with a distance from Earth, the receive antennas having directional receiving patterns which cover a common region on Earth, the method comprising the following steps: —precoding the symbol sequences before transmission from the transmitting antennas to the receive antennas in order to reduce spatial interference between the symbol sequences, and —simultaneously transmitting symbol sequences from the transmitting antennas to the receive antennas by spatial and frequency multiplexing in a time and phase synchronized fashion, the symbol sequences being transmitted from different transmitting antennas being different from each other but being transmitted on the same frequency.

Abstract: The invention relates to a method for linking a terminal (1) into a region (4a) of an interconnectable computer infrastructure (2) which is designed for a plurality of users (6, 6a), said region being allocated to a user (6a). A user certificate (12a) is generated for the region (4a) allocated to the user (6a) and is provided to the user (6a) and/or the interconnectable computer infrastructure (2). A terminal certificate (16a) which is compatible with the user certificate (12a) is generated, and the terminal certificate (16a) is entered into the terminal (1). The terminal (1) is registered in the interconnectable computer infrastructure (2) via a data connection (20), wherein the terminal certificate (16a) and/or a password which is encrypted using the terminal certificate (16a) is transmitted from the terminal (1) to the interconnectable computer infrastructure (2) via the data connection (20) for the registration process.

Abstract: The present invention relates to a satellite communications system comprising a satellite with a spatial digital modulator for transmitting an incoming bit stream in multiple beams, wherein the spatial digital modulator configured to generate transmit symbols by dividing the incoming bit stream into symbols of a symbol alphabet and to allocate each transmit symbol to a specific beam. The invention further relates to a method for transmitting a bit stream by such a satellite communications system.

Abstract: The invention relates to a method for linking a terminal (1) into a region (4a) of an interconnectable computer infrastructure (2) which is designed for a plurality of users (6, 6a), said region being allocated to a user (6a). A user certificate (12a) is generated for the region (4a) allocated to the user (6a) and is provided to the user (6a) and/or the interconnectable computer infrastructure (2). A terminal certificate (16a) which is compatible with the user certificate (12a) is generated, and the terminal certificate (16a) is entered into the terminal (1). The terminal (1) is registered in the interconnectable computer infrastructure (2) via a data connection (20), wherein the terminal certificate (16a) and/or a password which is encrypted using the terminal certificate (16a) is transmitted from the terminal (1) to the interconnectable computer infrastructure (2) via the data connection (20) for the registration process.

Abstract: Operating a communication system comprises providing N transmitting antennas (TA) for transmitting symbol streams (SST) and K ground receivers (GR) which may be provided with symbol streams (SST) transmitted by transmitting antennas (TA). Transmitting antennas (TA) are located with a distance from Earth (E). Ground receivers (GR) are spatially separated from each other, wherein the constraint K>N applies. The method includes: simultaneously transmitting N symbol streams (SST) by N transmitting antennas (TA), receiving a linear combination of N simultaneously transmitted symbol streams (SST) by each ground receiver (GR), respectively, determining the respective linear combination for N transmitting antennas (TA) and each of the K ground receivers (GR), respectively, deciding on the basis of the determined linear combinations which of the K ground receivers (GR) is assigned to a respective common receiver group in order to be simultaneously and with the same frequency provided with symbol streams (SST).

Abstract: Provided is a layered process for identifying a first signal sequence within a received signal sequence by cross-correlating a received signal sequence with a first correlation sequence to derive a first correlation pattern indicating occurrences of the first correlation sequence within the received signal sequence and cross-correlating the first correlation pattern with a first correlation sequence pattern to detect a first signal sequence comprising occurrences of the first correlation sequence as indicated by the first correlation sequence pattern, within the received signal sequence.

Abstract: The invention relates to a method for operating a communication system, the communication system comprising at least two separate transmitting antennas located on Earth and at least two receive antennas located with a distance from Earth, the receive antennas having directional receiving patterns which cover a common region on Earth, the method comprising the following steps: —precoding the symbol sequences before transmission from the transmitting antennas to the receive antennas in order to reduce spatial interference between the symbol sequences, and —simultaneously transmitting symbol sequences from the transmitting antennas to the receive antennas by spatial and frequency multiplexing in a time and phase synchronized fashion, the symbol sequences being transmitted from different transmitting antennas being different from each other but being transmitted on the same frequency.

Abstract: Provided is a layered process for identifying a first signal sequence within a received signal sequence by cross-correlating a received signal sequence with a first correlation sequence to derive a first correlation pattern indicating occurrences of the first correlation sequence within the received signal sequence and cross-correlating the first correlation pattern with a first correlation sequence pattern to detect a first signal sequence comprising occurrences of the first correlation sequence as indicated by the first correlation sequence pattern, within the received signal sequence.

Abstract: A method for connecting an end device to a linkable computer infrastructure is provided. A device certificate is created and supplied to a user of the end device. The device certificate is input into the end device. A data link from the end device to an access zone connected upstream of functions of the linkable computer infrastructure is produced. The access zone may be selectively separated from the functions of the linkable computer infrastructure by this link. The end device is registered in the access zone using the device certificate. By access of a function from the linkable computer infrastructure to the end device registered in the access zone, this end device is identified for the linkable computer infrastructure. With successful identification of the end device, use of the linkable computer infrastructure is enabled for the end device.

Abstract: Disclosed are a process and a system for ascertaining an operating point of a nonlinear power amplifier, wherein a signal amplified by the power amplifier is received, and a value of a measure of a deviation of the amplitude distribution of the received signal from a Gaussian distribution is ascertained.

Abstract: Operating a communication system comprises providing N transmitting antennas (TA) for transmitting symbol streams (SST) and K ground receivers (GR) which may be provided with symbol streams (SST) transmitted by transmitting antennas (TA). Transmitting antennas (TA) are located with a distance from Earth (E). Ground receivers (GR) are spatially separated from each other, wherein the constraint K>N applies. The method includes: simultaneously transmitting N symbol streams (SST) by N transmitting antennas (TA), receiving a linear combination of N simultaneously transmitted symbol streams (SST) by each ground receiver (GR), respectively, determining the respective linear combination for N transmitting antennas (TA) and each of the K ground receivers (GR), respectively, deciding on the basis of the determined linear combinations which of the K ground receivers (GR) is assigned to a respective common receiver group in order to be simultaneously and with the same frequency provided with symbol streams (SST).

Abstract: A countermeasure system is provided including a frame and two or more rows of countermeasures disposed on the frame. Each row of the countermeasures may be configured to be initiated substantially simultaneously along the length of the row. Additional countermeasure systems may include elongated explosive charges and or masses disposed along the length of the rows. The frame may include two or more ridges on a side opposite to the two or more rows of countermeasures, the ridges being configured to engage with corresponding ridges on a vehicle when the countermeasure panel is mounted to the vehicle.

Abstract: A countermeasure system is provided including a frame and two or more rows of countermeasures disposed on the frame. Each row of the countermeasures may be configured to be initiated substantially simultaneously along the length of the row. Additional countermeasure systems may include elongated explosive charges and or masses disposed along the length of the rows. The frame may include two or more ridges on a side opposite to the two or more rows of countermeasures, the ridges being configured to engage with corresponding ridges on a vehicle when the countermeasure panel is mounted to the vehicle.

Abstract: A method for enabling an oscillating crystal available in a system to be used to generate a software-realized time function, and an apparatus for implementing the method, without requiring additional hardware components, wherein a periodic interrupt signal is generated by the system-internal real-time clock, a table entry with a reference to a routine in an intra-system table is accessed upon receipt of the periodic interrupt signal and a counter is formed by the routine.

Abstract: A method for enabling an oscillating crystal available in a system to be used to generate a software-realized time function, and an apparatus for implementing the method, without requiring additional hardware components, wherein a periodic interrupt signal is generated by the system-internal real-time clock, a table entry with a reference to a routine in an intra-system table is accessed upon receipt of the periodic interrupt signal and a counter is formed by the routine.

Abstract: A turbine air-intake filter for removal of particles from an air stream entering a gas turbine comprises a composite filter media (10) being made from a membrane filtration layer (20) comprising a porous polymeric membrane, such as porous polytetrafluoroethylene (ePTFE), and at least one depth filtration media layer (18) comprising fibers, such as a melt blown web, and being disposed on an upstream side of the membrane filtration layer (20) relative to a direction of gas flow through the filter. The fibers of the depth filtration media layer (18) have an electrostatic charge. The ePTFE membrane is preferably made from a blend of a PTFE homopolymer and a modified PTFE polymer.

Abstract: A fan cooling unit (10) for cooling electronic components, such as for an air-cooled telecommunications base station, comprises a protective covering for at least the air inlet opening (11) of a casing (8) in which the electronic components are housed. The protective covering (1) has a frame (2) into which a composite filter media (3) is mounted so as to create an air-tight fit. The composite filter media (3) comprises a membrane filtration layer (20) with a porous polymeric membrane, such as expanded polytetrafluoroethylene (ePTFE), and at least one depth filtration layer (18) disposed on an upstream side of the membrane filtration layer (20). The depth filtration media layer comprises fibers having an electrostatic charge. The ePTFE membrane is preferably made from a blend of a PTFE homopolymer and a modified PTFE polymer.

Abstract: An electrical connection between a vibratory rotation sensor and a hermetic header which makes use of a local interference fit to provide a high degree of mechanical isolation between the sensor and the header. The electrical connection includes an electrical pin extending from the header which is connected to the sensor through a coil spring. The pin includes an enlarged portion having a maximal dimension greater than an inner diameter of the coil spring to provide an interference fit between the coil spring and the pin. The degree of interference is variable controlled by selecting the dimensions of the enlarged portion of the pin and the coil spring. The degree of mechanical isolation between the header and sensor can also be chosen by selecting the location of the enlarged portion along a length of the pin. This provides a reliable electrical connection which maintains a high degree of mechanical isolation.