Abstract: A signal processing system is described. The signal processing system includes at least one signal processing path and a control module. The at least one signal processing path includes at least one signal input and at least two filter units. The at least two filter units include at least one hardware filter unit. The at least one signal input is connectable to at least one external electronic component. The control module is connected to the signal input and to the at least two hardware filter units. The control module is configured to determine a frequency response deviation being associated with the at least one external electronic component. The control module further is configured to reconfigure the at least one hardware filter unit such that the frequency response deviation is compensated at least partially. Further, a signal processing method for adapting filter coefficients of a signal processing system is described.

Abstract: A comb signal generator that includes at least two signal sources that each provide a signal, wherein the signals provided by the at least two signal sources are shaped similarly. The com signal generator also has a combining circuit connected with the at least two signal sources, wherein the combining circuit is configured to combine the signals provided by the at least two signal sources, thereby generating a combined signal. Further, the com signal generator includes a clipping circuit connected with the combining circuit, wherein the clipping circuit is configured to receive and process the combined signal, thereby generating a comb signal. Further, a method of providing a phase and amplitude reference is described.

Abstract: A classification method for classifying physical layer protocol data units (PPDU) for further RF quality analysis is described. The classification method Includes: receiving a plurality of PPDUs; processing the plurality of PPDUs by a PPDU classification algorithm, thereby obtaining at least one classification parameter being associated with at least one of at least two different classes; and augmenting the PPDUs with classification information based on the at least one classification parameter, thereby obtaining augmented PPDUs. Further, a classification apparatus comprising one or more circuits for classifying physical layer protocol data units (PPDU) for further RF quality analysis is described.

Abstract: A comb signal generator that includes at least two signal sources that each provide a signal, wherein the signals provided by the at least two signal sources are shaped similarly. The comb signal generator also has a combining circuit connected with the at least two signal sources, wherein the combining circuit is configured to combine the signals provided by the at least two signal sources, thereby generating a combined signal. Further, the comb signal generator includes a clipping circuit connected with the combining circuit, wherein the clipping circuit is configured to receive and process the combined signal, thereby generating a comb signal. Further, a method of providing a phase and amplitude reference is described.

Abstract: A signal processing system is described. The signal processing system includes at least one signal processing path and a control module. The at least one signal processing path includes at least one signal input and at least two filter units. The at least two filter units include at least one hardware filter unit. The at least one signal input is connectable to at least one external electronic component. The control module is connected to the signal input and to the at least two hardware filter units. The control module is configured to determine a frequency response deviation being associated with the at least one external electronic component. The control module further is configured to reconfigure the at least one hardware filter unit such that the frequency response deviation is compensated at least partially. Further, a signal processing method for adapting filter coefficients of a signal processing system is described.

Abstract: A classification method for classifying physical layer protocol data units (PPDU) for further RF quality analysis is described. The classification method Includes: receiving a plurality of PPDUs; processing the plurality of PPDUs by a PPDU classification algorithm, thereby obtaining at least one classification parameter being associated with at least one of at least two different classes; and augmenting the PPDUs with classification information based on the at least one classification parameter, thereby obtaining augmented PPDUs. Further, a classification apparatus comprising one or more circuits for classifying physical layer protocol data units (PPDU) for further RF quality analysis is described.

Abstract: A receiver with a power detecting function for a pulsed signal is provided. Said receiver comprises an accumulator for accumulating samples of the respective power of the corresponding signal over time. In this context, the respective accumulation length is a window being based on the pulse length of the corresponding signal. Furthermore, the receiver may additionally comprise an output for outputting several windows and a maximum detector. In this context, the maximum detector is configured to determine a maximum power value of the several windows.

Abstract: A method for separating spectrums of an input signal having a first spectrum and a second spectrum by mixing the input signal at a first mixer with a first frequency to obtain a first mixed signal; mixing the input signal at a second mixer with second frequency to obtain a second mixed signal; displacing the first mixed signal and/or the second mixed signal up and down by the difference of the first and second frequency obtaining at least one lower auxiliary signal and at least one upper auxiliary signal, respectively; and extracting the first spectrum and/or the second spectrum using the lower auxiliary signal and/or the upper auxiliary signal as well as the first mixed signal and/or the second mixed signal. Further, measurement devices for separating spectrums are shown.

Abstract: A measurement device with automatic optimization capabilities comprises at least one signal processing component with a physical detector and a virtual detector component comprising at least one virtual detector for a signal processing component without physical detector. The physical detector is configured to physically measure a measurement value assigned to the signal processing component. The virtual detector component is configured to use a model of a signal processing chain from the physical detector to the location of the virtual detector. The model comprises at least one model parameter for the signal processing chain. The measurement device is configured to adapt the virtual detector component with respect to a measurement type for the signal to be measured. The virtual detector component is configured to use the model and the at least one measurement value.

Abstract: A receiver with a power detecting function for a pulsed signal is provided. Said receiver comprises an accumulator for accumulating samples of the respective power of the corresponding signal over time. In this context, the respective accumulation length is a window being based on the pulse length of the corresponding signal. Furthermore, the receiver may additionally comprise an output for outputting several windows and a maximum detector. In this context, the maximum detector is configured to determine a maximum power value of the several windows.

Abstract: A measurement system for automated measurement of several contributions to signal degradation is provided. Said measurement system comprises a device under test, a signal analyzer, and a controller. In this context, the controller comprises at least one command sequence for the device under test and/or the signal analyzer. In addition to this, each of the at least one command sequence comprises respective commands to compensate for a specific cause of signal degradation.

Abstract: A measurement device with automatic optimization capabilities comprises at least one signal processing component with a physical detector and a virtual detector component comprising at least one virtual detector for a signal processing component without physical detector. The physical detector is configured to physically measure a measurement value assigned to the signal processing component. The virtual detector component is configured to use a model of a signal processing chain from the physical detector to the location of the virtual detector. The model comprises at least one model parameter for the signal processing chain. The measurement device is configured to adapt the virtual detector component with respect to a measurement type for the signal to be measured. The virtual detector component is configured to use the model and the at least one measurement value.

Abstract: A system to create periodic pulse sequences with defined absolute phase comprises a phase coherent analyzer and a pulse generator. The phase coherent analyzer and the pulse generator are connected with each other. The pulse generator has a clock input connected to the analyzer for receiving a clock signal from the analyzer. The system comprises a trigger line via which a marker signal is provided to at least one of the analyzer and the pulse generator. The marker signal temporally aligns an output signal of the pulse generator with a measurement process of the analyzer. Further, a method of creating periodic pulse sequences with defined absolute phase is described.

Abstract: A frequency comb generating device is described. The frequency comb generating device comprises a pulsed optical light source, a sequence generator, a light receiving unit and a switching unit. The sequence generator is configured to generate a repeating sequence signal and to forward the repeating sequence signal at least to the switching unit. The pulsed optical light source is configured to generate electromagnetic wave packets and is synchronized with the sequence generator. The light receiving unit is configured to receive the electromagnetic wave packets and to convert the electromagnetic wave packets into an electrical signal. The switching unit is configured to at least one of control the pulsed optical light source, control the light receiving unit, attenuate the electromagnetic wave packets, phase shift the electromagnetic wave packets, attenuate the electrical signal, and phase shift the electrical signal based on the repeating sequence signal.

Abstract: A frequency comb generating device is described. The frequency comb generating device comprises a pulsed optical light source, a sequence generator, a light receiving unit and a switching unit. The sequence generator is configured to generate a repeating sequence signal and to forward the repeating sequence signal at least to the switching unit. The pulsed optical light source is configured to generate electromagnetic wave packets and is synchronized with the sequence generator. The light receiving unit is configured to receive the electromagnetic wave packets and to convert the electromagnetic wave packets into an electrical signal. The switching unit is configured to at least one of control the pulsed optical light source, control the light receiving unit, attenuate the electromagnetic wave packets, phase shift the electromagnetic wave packets, attenuate the electrical signal, and phase shift the electrical signal based on the repeating sequence signal.

Abstract: A method for separating spectrums of an input signal having a first spectrum and a second spectrum by mixing the input signal at a first mixer with a first frequency to obtain a first mixed signal; mixing the input signal at a second mixer with second frequency to obtain a second mixed signal; displacing the first mixed signal and/or the second mixed signal up and down by the difference of the first and second frequency obtaining at least one lower auxiliary signal and at least one upper auxiliary signal, respectively; and extracting the first spectrum and/or the second spectrum using the lower auxiliary signal and/or the upper auxiliary signal as well as the first mixed signal and/or the second mixed signal. Further, measurement devices for separating spectrums are shown.

Abstract: A test and measurement device is described that includes a radio frequency input for receiving a radio frequency signal, a mixer to mix the radio frequency signal into a first intermediate frequency signal, a splitter to split the first intermediate frequency signal into several split signals, several signal paths for processing the several split signals, and a recombiner that is configured to recombine the split signals in order to create an output signal having a frequency span substantially representing the one of the radio frequency signal. Further, a method for calibrating a test and measurement device and a method for analyzing a high bandwidth of a radio frequency signal are described.

Abstract: A method for calibrating a radio frequency test instrument is described wherein a first frequency response is measured using a radio frequency and coarse intermediate frequency grid. A first matrix is created comprising data obtained from said first frequency response measuring. A second frequency response is measured using a radio frequency and fine intermediate frequency grid. A second matrix is created comprising data obtained from said second frequency response measuring. Said first matrix and said second matrix are processed and combined in order to determine a frequency response for a radio frequency desired, said first matrix and said second matrix comprising data obtained from measurements performed with different radio frequency and intermediate frequency grids. Further, a radio frequency test instrument is described.

Abstract: A method for calibrating a radio frequency test instrument is described wherein a first frequency response is measured using a radio frequency and coarse intermediate frequency grid. A first matrix is created comprising data obtained from said first frequency response measuring. A second frequency response is measured using a radio frequency and fine intermediate frequency grid. A second matrix is created comprising data obtained from said second frequency response measuring. Said first matrix and said second matrix are processed and combined in order to determine a frequency response for a radio frequency desired, said first matrix and said second matrix comprising data obtained from measurements performed with different radio frequency and intermediate frequency grids. Further, a radio frequency test instrument is described.

Abstract: A test and measurement device is described that comprises a radio frequency input for receiving a radio frequency signal, a mixer to mix said radio frequency signal into a first intermediate frequency signal, a splitter to split said first intermediate frequency signal into several split signals, several signal paths for processing said several split signals, and a recombiner that is configured to recombine said split signals in order to create an output signal having a frequency span substantially representing the one of said radio frequency signal. Further, a method for calibrating a test and measurement device and a method for analyzing a high bandwidth of a radio frequency signal are described.