Abstract: A clock recovery method for recovering a clock signal from a data signal is described, wherein the data signal comprises a symbol sequence. The clock recovery method comprises the following steps: The data signal is received. At least two partial clock timings of a partial clock signal that is based on the data signal are determined. The number of symbols between the at least two partial clock timings is determined. Clock timings of the clock signal are determined based on the at least two partial clock timings and the number of symbols. Further, a clock recovery module is described.

Abstract: A measurement system comprising an anechoic space, a measurement antenna, a device under test, a spectrum analyzer, and a power sensor. The device under test transmits a signal. The measurement antenna measures the signal transmitted by the device under test. The signal measured by the measurement antenna is forwarded at least partly to the power sensor. The power sensor triggers the spectrum analyzer to perform a measurement. Further, a method of measuring a signal is described.

Abstract: A bus data analysis method comprises the steps of receiving an input signal, decoding the input signal according to a protocol, thereby extracting a data signal from the input signal, and analyzing the data signal extracted from the input signal statistically, thereby generating a statistically analyzed data signal. Furthermore, a bus data analysis system is described.

Abstract: A device for generating training data sets for signal type recognition has at least one radio frequency signal generator for generating at least one artificial radio frequency signal, a radio frequency receiver connected to the at least one radio frequency signal generator for receiving the at least one artificial radio frequency signal generated by the at least one radio frequency signal generator, and a signal data recorder connected to the radio frequency receiver for storing the radio frequency signal received by the radio frequency receiver as a training data set. Further, a method for generating training data sets as well as a training data set are provided.

Abstract: A test system for testing a device under test comprises a testing device and a device under test. A beam control channel is established between the device under test and the testing device, via which a respective beam of the device under test to be applied is controlled such that beamforming of the device under test is carried out in the testing device. The testing device applies a transposed combined channel matrix, wherein the transposed combined channel matrix encompasses a transposed beamforming matrix of the device under test, a transposed channel matrix and a transposed beamforming matrix of an entity emulated by the testing device. Further, a method of testing a device under test is described.

Abstract: A measurement device with improved electrical strength comprises an input for receiving an input signal as well as a measurement circuit connected with the input. The measurement circuit has at least one component. The measurement device also comprises an electrical interface provided in addition to the input. The measurement device further comprises at least one internal enclosure that encloses the component within the measurement device, thereby improving the electrical strength of the measurement device.

Abstract: A signal generation system for signal simulation includes at least one data input, a pulse description word generator, a multi-frequency signal generator, and at least one radio frequency output. The multi-frequency signal generator is configured to simulate a multi-frequency global navigation satellite system signal. The pulse description word generator and the multi-frequency signal generator are assigned to the data input in order to process data received via the data input. The pulse description word generator and the multi-frequency signal generator are configured to generate an output signal based on at least one instruction for a certain generator behavior of the pulse description word generator and/or the multi-frequency signal generator. The at least one instruction is encompassed in the data received. Further, a method of signal generation is described.

Abstract: A port multiplier for extending ports of a radio communication test instrument comprises an input for receiving at least one input signal, a power supply unit, a control logic, and at least one output for outputting a processed signal. The port multiplier is configured to split the at least one input signal into its different components such that a radio signal component of the input signal is forwarded to the at least one output. A power signal component of the input signal is forwarded to the power supply unit. Further, a control signal component of the input signal is forwarded to the control logic. Moreover, a radio communication test system for testing a device under test is described.

Abstract: A sampling assembly is described. The sampling assembly comprises an input, a light source unit, at least one deflector unit, and a light receiver. The input is configured to receive an electrical input signal. The light source unit is configured to generate and output a light beam in the direction of the deflector unit. The light source unit is configured to adapt an intensity of the light beam based on an amplitude of the input signal. The deflector unit is configured to obtain a deflection command signal. The deflector unit further is configured to deflect the light beam into at least one spatial direction based on the deflection command signal. The light receiver comprises at least two photosensitive pixels. The light receiver is configured to receive the light beam via at least one of the at least two photosensitive pixels, and the light receiver is configured to convert received light into an electrical output signal. Further, a testing instrument is described.

Abstract: A method of analyzing a ground-based augmentation system (GBAS) signal, comprising: transmitting at least one GBAS message burst; receiving the GBAS message burst, and performing a power measurement at symbol times of the GBAS message burst. Further, a test system for testing a ground-based augmentation system is described.

Abstract: A method for reporting scheduling decisions by a communication tester is provided. The method comprises the steps of establishing a communication between the communication tester and a device under test, and creating a message log during the communication with the aid of the communication tester. In this context, the message log comprises reports with all negative scheduling decisions.

Abstract: A mobile radio testing device for protocol testing of a device under test is provided. The mobile radio testing device comprises a downlink path and an uplink path, wherein the uplink path comprises at least a first analysis mode and a second analysis mode. In this context, the mobile radio testing device includes a demodulation processing unit for analyzing signals from the device under test in the first analysis mode. In addition, the second analysis mode analyzes signals from the device under test without using the demodulation processing unit.

Abstract: A signal analysis method of analyzing a performance of a device under test is described. A digitized input signal is obtained, wherein the digitized input signal is associated with the device under test. At least one characteristic quantity is determined via an artificial intelligence circuit. The artificial intelligence circuit includes at least one computing parameter. The at least one characteristic quantity is determined based on the digitized input signal and based on the at least one computing parameter. The at least one characteristic quantity is indicative of at least one performance property of the device under test. Further, a test system for analyzing a performance of a device under test as well as a computer program or program product are described.

Abstract: A signal analysis method is described. The signal analysis method comprises the following steps: An input signal function associated with a time domain is obtained. A window function is determined based on the input signal function via an artificial intelligence module. The artificial intelligence module comprises at least one computing parameter, wherein the window function is determined based on the at least one computing parameter. The input signal function and the window function are convolved, thereby generating a convolved signal. Further, a signal analysis module is described.

Abstract: A system for calibrating a multi-channel radio frequency signal generation system is described. At least two signal sources and a calibration unit are provided. A calibration data module is provided that is assigned to at least one of the signal sources. The at least two signal sources are assigned to at least two signal channels. In a first operation mode, the calibration unit is connected with the at least two signal channels simultaneously. The calibration unit is configured to gather calibration data assigned to the at least two signal channels. The system is configured to transfer the calibration data gathered from the calibration unit to the calibration data module. In a second operation mode, the system is configured to disconnect the at least two signal channels from the calibration unit and to connect the at least two signal channels with a device under test. Further, a method of calibrating a multi-channel radio signal generation frequency system is described.

Abstract: A method for data transmission rate control in a network is provided. The method comprises the steps of establishing a connection to a device under test and transmitting rate control commands to the device under test via vendor specific information element fields of transmitting frames in order to control the transmission rate of the device under test.

Abstract: A signal analyzer for analyzing a signal comprises a frontend with at least two interleaved digitizers configured to digitize an input signal, thereby generating a digitized input signal. The signal analyzer also comprises a first interleave alignment filter established by a hardware interleave alignment filter that is configured to hardware-compensate non-ideal effects of the frontend in the digitized input signal in real-time, thereby generating a hardware-compensated, digitized input signal. Further, the signal analyzer comprises an acquisition memory configured to store the hardware-compensated, digitized input signal, thereby acquiring an acquired signal. Moreover, the signal analyzer comprises a second interleave alignment filter configured to fine-compensate further non-ideal effects of the frontend in a post-processing of the acquired signal. In addition, a method of analyzing a signal is described.

Abstract: A dynamic probe for probing a dynamic data signal comprising a switching unit configured to provide at least two different input impedances, wherein the switching unit is configured to select a first input impedance in a first mode and a second input impedance in a second mode, the switching unit being configured to be operated dynamically based on an event in the data signal processed. Further, a dynamic measurement system and a method for probing a dynamic data signal are described.

Abstract: The invention relates to a measuring device and a measurement method for the display of a measurement signal connected to the measuring device. The measuring device comprises a measurement-signal input, a measurement-parameter input, a calculation unit and a display unit for the display of calculated statistical signals. The measuring device is set up to display a plurality of statistical signals in parallel on the display unit in real-time.

Abstract: A method of calibrating a measurement and analyzing device for measuring a frequency-converting device under test, comprises the steps of connecting a first port of the measurement and analyzing device with a radio frequency port assigned to the frequency-converting device under test as well as connecting a second port of the measurement and analyzing device with an intermediate frequency port assigned to the frequency-converting device under test. Further, a scalar-mixer calibration is performed at the radio frequency port and the intermediate frequency port, thus providing a precise calibration conversion amplitude. A relative calibration is performed between the radio frequency port and the intermediate frequency port by using a calibration mixer. At least one correction coefficient is determined by the difference between the results obtained from the scalar-mixer calibration and the relative calibration. The at least one correction coefficient is used to correct an error term applied.