Abstract: A filling level monitoring device for monitoring a filling level of a fluid container is provided that includes an exciting element, a sensing element, a signal source, a suspension element with a defined stiffness, and a processing unit. The exciting element is configured to mount on the fluid container or suspension element to activate a specific suspension mode of vibration. The suspension element attaches rigidly to the fluid container so that both vibrate together. The sensing element detects these vibrations and sends data to the processing unit. The signal source generates a multi-frequency input signal for the exciting element. The processing unit uses the vibration data to identify the suspension mode, determine its modal frequency, and calculate the fluid container's current filling level based on this modal frequency.

Abstract: A filling level monitoring device includes an exciting element, first and second sensors, a signal source, and a processor. The exciting element can be mounted to the fluid container. The first and second sensors can be mounted to the fluid container at opposite sides. The signal source is connected to the exciting element and can generate an input signal including frequency components. The first and second sensors are each connected to the processor to sense vibrations within the fluid container and to generate and send corresponding vibration signals to the processor. The processor can determine a horizontal vibration mode from the vibration signals of the first and second sensors and the input signal, to determine a modal frequency of the determined horizontal vibration mode, and to determine a current filling level of the fluid container based on the modal frequency of the determined horizontal vibration mode.

Abstract: A wireless network infrastructure for an aircraft includes a first communication unit to receive and transmit data signals from and to a control system in a secured domain of the aircraft, the first communication unit configured as a first network node of a wireless communication network, second communication units of corresponding aircraft devices in an unsecured domain of the aircraft and configured as second network nodes of the wireless communication network. The aircraft devices are operable by control signals sent from the control system to the aircraft devices and transmit control signals to the control system over the wireless communication network, each aircraft device having a communication unit further comprising additional control dissimilar from the control signals sent over the wireless communication network for operating the aircraft device independently. Also provided are an aircraft including the wireless network infrastructure and a method for wireless communication onboard an aircraft.

Abstract: A system and a method for estimating a transmission channel of a communication link. A transmitter can transmit a first transmission signal and a receiver can receive the first transmission signal through the transmission channel. The first transmission signal includes data elements and pilots, each of the pilots being located at specified locations within a time-frequency domain of the first transmission signal. The receiver can determine a level of interference for each of the pilots, the level of interference being indicative of an extent of distortion on a respective pilot caused by a second transmission signal interfering with the first transmission signal. The receiver can further determine an interference-mitigated pilot for each pilot based on the determined level of interference determined for each respective pilot. The receiver can use the determined interference-mitigated pilots to estimate the transmission channel of the first transmission signal.

Abstract: A method performed by a mobile user equipment, UE, comprising: obtaining measurement information from a mobile phased array antenna, PAA, separate from the UE, the measurement information indicating, for at least one signal received by the PAA from a plurality of base stations, a received power, RP; determining, for the signal, a quality measure based on the RP of the signals; and transmitting, to a network node, a first message indicating the determined quality measure and enabling the network node to select at least one of the plurality of base stations as a target base station for a communication connection with the UE. Also a computer program, a UE, and a system.

Abstract: A network system includes access points and wireless devices. Each wireless device can exchange data with at least one access point that includes a diversity matrix defining at least two data exchange connections between a first wireless device and at least one access point for exchanging data between the first wireless device and the at least one access point. The diversity matrix indicates a space domain with at least one access point, a frequency domain with at least one data transmission frequency value, and a time domain with at least one data transmission time. Each data exchange connection is defined by an access point, a data transmission frequency, and a data transmission time, selected from the diversity matrix. The at least two data exchange connections between the first wireless device and the at least one access point are configured to transmit the same information.

Abstract: A filling level monitoring device for monitoring a filling level of a fluid in a container includes exciter(s), sensor(s), a signal source connected to the exciter(s), a processor, at least one spatial orientation and acceleration sensor, and a filling level indicator. The device uses the signal source and the exciter(s) to couple vibrational loads having multiple frequency components into the container. Sensors measure vibrations in the container after the exciters transmit the vibrational loads into the container. The processor performs spectral analysis of the input signal and of vibration signals from the sensors, comparing these respective spectral functions to extract resonance frequencies of the container, which are based on the spatial orientation of the container.

Abstract: A filling level monitoring device for monitoring a filling level of a fluid in a container includes exciter(s), sensor(s), a signal source connected to the exciter(s), a processor, at least one spatial orientation and acceleration sensor, and a filling level indicator. The device uses the signal source and the exciter(s) to couple vibrational loads having multiple frequency components into the container. Sensors measure vibrations in the container after the exciters transmit the vibrational loads into the container. The processor performs spectral analysis of the input signal and of vibration signals from the sensors, comparing these respective spectral functions to extract resonance frequencies of the container, which are based on the spatial orientation of the container.

Abstract: A method for synchronizing wireless network nodes of a wireless communication network involves a base station of the wireless communication network to determine or obtain a maximum value for a frequency content per unit of time of an FMCW radio-frequency signal interfering with the wireless communication network, transmit a first synchronization frame containing a first synchronization sequence in a first wireless communication frequency bandwidth, and transmit a second synchronization frame simultaneously to the first synchronization frame, the second synchronization frame containing a second synchronization sequence in a second wireless communication frequency bandwidth that is spaced apart from the first wireless communication frequency bandwidth by a spectral distance larger or equal to the product of the determined maximum value for the frequency content per unit of time of the FMCW radio-frequency signal and duration of the first and second synchronization sequences.

Abstract: A system and a method for estimating a transmission channel of a communication link. A transmitter can transmit a first transmission signal and a receiver can receive the first transmission signal through the transmission channel. The first transmission signal includes data elements and pilots, each of the pilots being located at specified locations within a time-frequency domain of the first transmission signal. The receiver can determine a level of interference for each of the pilots, the level of interference being indicative of an extent of distortion on a respective pilot caused by a second transmission signal interfering with the first transmission signal. The receiver can further determine an interference-mitigated pilot for each pilot based on the determined level of interference determined for each respective pilot. The receiver can use the determined interference-mitigated pilots to estimate the transmission channel of the first transmission signal.

Abstract: A network system includes access points and wireless devices. Each wireless device can exchange data with at least one access point that includes a diversity matrix defining at least two data exchange connections between a first wireless device and at least one access point for exchanging data between the first wireless device and the at least one access point. The diversity matrix indicates a space domain with at least one access point, a frequency domain with at least one data transmission frequency value, and a time domain with at least one data transmission time. Each data exchange connection is defined by an access point, a data transmission frequency, and a data transmission time, selected from the diversity matrix. The at least two data exchange connections between the first wireless device and the at least one access point are configured to transmit the same information.

Abstract: A method for synchronizing wireless network nodes of a wireless communication network involves a base station of the wireless communication network to determine or obtain a maximum value for a frequency content per unit of time of an FMCW radio-frequency signal interfering with the wireless communication network, transmit a first synchronization frame containing a first synchronization sequence in a first wireless communication frequency bandwidth, and transmit a second synchronization frame simultaneously to the first synchronization frame, the second synchronization frame containing a second synchronization sequence in a second wireless communication frequency bandwidth that is spaced apart from the first wireless communication frequency bandwidth by a spectral distance larger or equal to the product of the determined maximum value for the frequency content per unit of time of the FMCW radio-frequency signal and duration of the first and second synchronization sequences.

Abstract: A data evaluation system, in particular for data evaluation on interfaces on board an aircraft, includes a data processing server having a receiver device, a data processing processor and an external server interface, and includes multiple data readers, coupled to the data processing server via the receiver device, that each have a device processor and a data capture component connected to the device processor and are configured to forward data captured by the data capture component to the data processing server for conditioning.

Abstract: This relates to wireless communication on-board aircraft. More particularly, the present disclosure relates to a method for controlling an on-board aircraft network cell to be used in an on-board aircraft wireless communication network, to such an on-board aircraft network cell configured to be used in an on-board aircraft wireless communication network, to an on-board aircraft wireless communication network comprising at least one such on-board aircraft network cell, and to an aircraft comprising such on-board aircraft wireless communication network. An embodiment of the on-board aircraft network cell comprises at least one Wireless Module unit, at least two Wireless Data Concentrator units, and at least two independent wireless links, each wireless link being established between the at least one Wireless Module unit and one of the at least two Wireless Data Concentrator units.

Abstract: This relates to wireless communication on-board aircraft. More particularly, the present disclosure relates to a method for controlling an on-board aircraft network cell to be used in an on-board aircraft wireless communication network, to such an on-board aircraft network cell configured to be used in an on-board aircraft wireless communication network, to an on-board aircraft wireless communication network comprising at least one such on-board aircraft network cell, and to an aircraft comprising such on-board aircraft wireless communication network. An embodiment of the on-board aircraft network cell comprises at least one Wireless Module unit, at least two Wireless Data Concentrator units, and at least two independent wireless links, each wireless link being established between the at least one Wireless Module unit and one of the at least two Wireless Data Concentrator units.