Abstract: The present disclosure relates to a system for attempting to establish a connection between a mobile phone and a virtual node of a cellular network. The system includes the virtual node that is configured to be switchable such that the virtual node is switched off and on in a defined manner. The virtual node is configured to automatically change at least one cell parameter each time the virtual node is switched off and on. Further, the present disclosure relates to a method of attempting to establish a connection between a mobile phone and a virtual node of a cellular network.

Abstract: A probe tip module includes a probe tip interface and a probe tip memory. The probe tip interface is connectable to a probe main module. A reduced characterization data set is stored in the probe tip memory. The prove tip module may be part of a probe system or a measurement system.

Abstract: A method of determining a signal histogram having a predetermined number of bins. The method includes: receiving an input signal; decimating the input signal, thereby generating a decimated signal that includes a maximum signal value and a minimum signal value associated with the maximum signal value; assigning the maximum signal value to a maximum bin of a signal histogram; assigning the minimum signal value to a minimum bin of the signal histogram; and filling at least one intermediate bin of the signal histogram with an intermediate value, wherein the intermediate bin is located between the minimum bin and the maximum bin in the signal histogram.

Abstract: A method of performing a measurement of a device under test by using an antenna array.

Abstract: An external frontend device is described. The external frontend device includes an integrated synthesizer circuit, a reference signal input, a receiver channel, a transmitter channel, and at least one mixer circuit. The reference signal input is configured to receive a low-frequency reference signal. The reference signal input is configured to forward the received low-frequency reference signal to the integrated synthesizer circuit. The integrated synthesizer circuit is configured to generate a local oscillator (LO) signal based on the low-frequency reference signal. The at least one mixer circuit is associated with the receiver channel and/or with the transmitter channel. The at least one mixer circuit is configured to mix the LO signal with a radio frequency (RF) signal processed by the receiver channel and/or with an intermediate frequency (IF) signal processed by the transmitter channel, thereby obtaining an IF output signal and/or an RF output signal, respectively.

Abstract: Embodiments of the present disclosure relate to methods of finding optimized analog measurement hardware settings of a measurement system for a target measurement. The method can include one or more of the following steps: applying initial settings to the measurement system; varying the settings over a power sweep while processing a test signal used for the target measurement or a representative signal; performing the target measurement during the power sweep, thereby determining a hardware contribution of the measurement system over the power sweep; and identifying the respective settings that lead to a minimum hardware contribution of the measurement system at various powers.

Abstract: The present disclosure concerns a method of processing measurement data. The method includes gathering measurement data by a measurement component, processing the measurement data by the measurement component, thereby producing at least one two-dimensional histogram of a measurement quantity depending on a variable for at least one period of time, forwarding, by the measurement component, the at least one two-dimensional histogram to a processing component, and processing, by the processing component, the at least one two-dimensional histogram received from the measurement component, thereby generating data associated with at least one histogram and data associated with a waterfall diagram having several waterfall lines, wherein each of the several waterfall lines is associated with an individual histogram. Further, the present disclosure concerns a system for processing measurement data.

Abstract: A measurement system is described. The measurement system comprises a measurement device and a probe unit, wherein the measurement device comprises an image analysis circuit or module. The probe unit comprises at least one image sensor, wherein the at least one image sensor is connected to the image analysis module in a signal transmitting manner. The image sensor is configured to capture an image of a measurement area being associated with a device under test. The image analysis module is configured to analyze the image captured and to determine at least one characteristic quantity of the image captured via an image analysis technique. The image analysis module is further configured to gather an information concerning a test position of the probe unit from the at least one characteristic quantity. Further, a method for operating a measurement system is described.

Abstract: A digital filter circuit is described. The digital filter circuit includes a pre-adder circuit, a convolution circuit, and a post-adder circuit. The pre-adder circuit includes a number of n pre-adder sub-circuits, wherein n is an integer greater than or equal to 2. The convolution circuit includes a number of m convolution sub-circuits, wherein m is an integer. The post-adder circuit includes a number of k post-adder sub-circuits, wherein k is an integer greater than or equal to 2. The number m of convolution sub-circuits is greater than the number n of pre-adder sub-circuits of the pre-adder circuit. The number m of convolution sub-circuits is greater than the number k of post-adder sub-circuits of the post-adder circuit. Further, an electronic device is described.

Abstract: A digital filter circuit is described. The digital filter circuit includes a digital filter input, at least two finite impulse response (FIR) filter circuits, and a connection circuit. The digital filter input is configured to receive a digital input signal set having a data parallelism. The at least two FIR filter circuits are configured to process the digital input signal set at least partially. The at least two FIR filter circuits include a pre-adder sub-circuit, a convolution sub-circuit, and a post-adder sub-circuit, respectively. The connection circuit is configured to selectively connect the at least two FIR filter circuits based on the data parallelism of the digital input signal set.

Abstract: A method of determining an equivalent source associated with a device under test by an over-the-air test (OTA) test system is described. The OTA test system includes an analysis circuit and at least one measurement antenna. The method includes the steps of: conducting, by the at least one measurement antenna, at least two sets of measurements of electromagnetic waves emitted by the device under test, thereby generating measurement signals associated with the electromagnetic waves; determining, by the analysis circuit, at least one radiation parameter of the device under test based on the measurement signals, wherein the at least one radiation parameter is associated with the electromagnetic waves emitted by the device under test; and determining, by the analysis circuit, an equivalent source on a Huygens surface based on the at least one determined radiation parameter, wherein the equivalent source is associated with the device under test.

Abstract: The present disclosure provides a main measurement device for simultaneously measuring signals with at least one secondary measurement device, the main measurement device comprising a reference signal output port configured to couple to the at least one secondary measurement device, a reference signal generator coupled to the reference signal output port and configured to generate a reference signal, a measurement port configured to receive a signal to be measured, a trigger output port configured to couple to a trigger input port of the at least one secondary measurement device and to output a trigger signal, and a controllably switchable internal signal path configured to selectively couple the reference signal generator with the measurement port. Further, the present invention discloses a respective secondary measurement device, a respective measurement system, and a respective method.

Abstract: The present disclosure relates to an over-the-air test apparatus for testing a device under test over-the-air. The test apparatus includes an antenna that is connected with a radio frequency circuit having at least three ports. A first port of the radio frequency circuit is connected with a first path that includes a connector configured to connect a signal analyzer and/or a signal generator with the over-the-air test circuit. A second port of the radio frequency circuit is connected with a second path that encompasses a detector. The second path includes an interface configured to be connected with a power meter, a signal analyzer or a feedback interface of a signal generator. Further, a test system is described.

Abstract: A method and a test device for testing the CSI Type 2 channel estimation capability of a DUT are provided. The method includes: a) stimulating certain variance of PMI feedback values from the DUT, especially those belonging to the finer grained Type 2 CSI, b) a statistical collection of one or more PMI reports received through CSI reporting from the DUT during the test execution, c) an identification of Type 1/Type 2 PMI feedback type based on the CSI reports received from the DUT, and d) applying a pass criterion: a minimum threshold of Type 2 specific feedback reports must have been received.

Abstract: An air traffic control system is described that comprises at least two aircraft radios and a ground system. The ground system has an operator device and at least one ground radio station configured to communicate with the at least two aircraft radios. The ground system has a simultaneous transmission detection unit that is configured to detect at least two aircraft radio signals received simultaneously by the at least one ground radio station. The at least one ground radio station is configured to forward information with regard to the simultaneous transmission detection of at least two aircraft radio signals to at least one of the at least two aircraft radios. Furthermore, a method of simultaneous call transmission handling is described.

Abstract: A radar system for detecting aircraft signatures is provided. The system comprises a plurality of radar clusters where each radar cluster further comprises a plurality of transmit antennas and a plurality of receive antennas. In this context, the plurality of transmit antennas and the plurality of receive antennas are co-located within each radar cluster. Furthermore, the plurality of transmit antennas are time synchronized and/or phase coherent with the plurality of receive antennas.

Abstract: A monitoring system and monitoring method for detecting a spectral anomaly in a cellular wireless network, in particular a 5G private uRLLC network, wherein an RF receiver monitors the cellular wireless network spectrum and derives spectrum and/or physical measurement values of the spectrum of the cellular wireless network, and a processing unit of the monitoring system executes a spectral anomaly neural network trained by a machine learning algorithm in a training system, wherein the processing unit obtains the spectrum and/or the physical measurement values of the spectrum and processes it to detect a spectral anomaly information.

Abstract: A scalable multiviewer system comprises at least one communication module. The at least one communication module comprises at least one input being associated with at least one data source. The at least one communication module comprises at least one output being associated with at least one data sink. The at least one communication module comprises at least one channel interface for an inter-module communication channel configured to transfer data between the at least one communication module and at least one further communication module. The at least one communication module comprises a processor configured to receive an input signal from the at least one input, to downscale the input signal based on at least one preset communication parameter, and to selectively transmit the downscaled input signal to either the output or to the channel interface for the inter-module communication channel based on the at least one preset communication parameter.

Abstract: A direction finding method of determining bearings of radio signals by a direction finding system is described. Further, a direction finding system for determining bearings of radio signals is described.

Abstract: A measurement device is described that comprises a measurement unit configured to perform measurements on an electric signal of a device under test while applying at least one measurement parameter for performing the measurements. The measurement device has an integrated direct current source configured to power the device under test. The measurement device also comprises a monitoring unit configured to monitor at least one monitoring parameter of the direct current source. The measurement device has a control unit configured to control the measurement parameter. Further, a method for measuring a device under test is described.