DE102020100948A1 - BUS DECODING AND TRIGGERING ON DIGITALLY DOWNWARDED DATA IN A TEST AND MEASURING INSTRUMENT - Google Patents

Abstract

Test and measurement instrument with a digital down converter configured to receive a bus signal and output in-phase and quadrature-phase baseband component waveform data, a track generator configured to the in-phase and quadrature phases Receive baseband component waveform data and generate at least one radio frequency over time trace, a decoder configured to receive the at least one radio frequency over time trace and the bus signal based on the at least one radio frequency decode over time trace and a wireless modulation scheme, and a trigger configured to detect at least a portion of the bus signal based on the decoded bus signal.

Description

PRIORITY

This revelation takes advantage of the provisional U.S. Application No. 62 / 794,528 entitled "BUS DECODE AND TRIGGERING ON DIGITAL DOWN CONVERTED DATA IN A TEST AND MEASUREMENT INSTRUMENT", which was filed on January 18, 2019 and which is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

This disclosure relates to systems and methods in connection with test and measurement systems and in particular to a test and measurement system for decoding wirelessly received bus data and for triggering on the decoded bus data.

BACKGROUND

Conventional testing and measuring instruments, e.g. Oscilloscopes allow the user to decode a serial bus signal. This can be done by sampling a serial bus signal as well as other signals that are required to decode the serial bus signal. Additional information is made available to the oscilloscope, e.g. Information about the serial bus detected, including what type of bus it is, what each channel is scanning, and various other setup information.

Given the setup information, a conventional oscilloscope can decode the actual packet and / or the data content that the bus transmits and make this data available to the user in the form of a decoded bus display. However, this type of capability is only available for wired serial and parallel bus connections and, due to the complexities of the wireless modulation schemes, cannot be performed on a signal using a wireless modulation scheme on a conventional oscilloscope.

Embodiments of the disclosure address these and other shortcomings in the prior art.

Figure list

• 1 ein Blockdiagramm eines Prüf- und Messinstruments gemäß einigen Ausführungsformen der Offenbarung ist.
• 2 ein Blockdiagramm eines anderen Prüf- und Messinstruments gemäß anderen Ausführungsformen der Offenbarung ist.
• 3 ein Flussdiagramm für die Dekodierung eines drahtlos empfangenen Bussignals gemäß Ausführungsformen der Offenbarung ist.

Aspects, features, and advantages of embodiments of the present disclosure will become apparent from the following description of embodiments with reference to the accompanying drawings, in which:

• 1 10 is a block diagram of a testing and measuring instrument according to some embodiments of the disclosure.
• 2nd 10 is a block diagram of another testing and measuring instrument according to other embodiments of the disclosure.
• 3rd 10 is a flowchart for decoding a wirelessly received bus signal according to embodiments of the disclosure.

DESCRIPTION

1 FIG. 4 shows a block diagram of an exemplary testing and measuring instrument according to some embodiments of the disclosure. The test and measurement instrument can have one or more inputs 100 included that are configured to receive one or more signals. At least one of the one or more inputs 100 receives a signal, such as a bus signal, to which a wireless modulation scheme has been applied to the signal. The one or more entrances 100 can receive the signal via either a wired or wireless input.

The test and measurement instrument may include one or more Analog to Digital Converter (ADC) 102 to convert the input bus signal to a digital bus signal. The digital bus signal can be down-converted or down-converted by a digital down converter (DDC: 104) into its in-phase or in-phase and quadrature phases or baseband component data which is phase-shifted by 90 °.

It can also be a track generator 106 receive the in-phase (I) and quadrature-phase (Q) baseband component information and derive or generate one or more time domain traces that may illustrate how a particular property of the bus signal changes over time. The time domain tracks may include one or more frequency-over-time tracks and / or in-phase baseband component data over time and quadrature-phase baseband component data over time. In some embodiments, a fast Fourier transform can be performed on the in-phase and quadrature-phase baseband components to produce a spectrum view of the time domain data.

The radio frequency-over-time track can comprise, for example, an amplitude-over-time track, a frequency-over-time track or a phase-over-time track. In addition, an amplitude-over-time track can be a linear power-over-time track, a logarithmic power-over-time track and / or comprise a linear amplitude-over-time track. The track generator 106 can generate in-phase baseband component tracks and quadrature-phase baseband component tracks.

$$\text{Q}=\text{A}\cdot \text{sin}\left(\mathrm{\varphi }\right);$$

$$\text{Spitzenamplitude A}={\left({\text{I}}^2+{\text{Q}}^2\right)}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.};$$

$$\text{Phasenwinkel }\mathrm{\varphi }={\text{tan}}^{-1}\left(\text{Q}/\text{I}\right);\text{ und}$$

$$\text{Frequenz}=\left({\text{Phase}}_{\text{n}+1}-{\text{Phase}}_{\text{n}}\right)/\left(360*1/{\text{SR}}_{\text{D}}\right).$$

The radio frequency over time traces are generated using the equations below, where I is that of the buck converter 104 determined in-phase baseband waveform data and Q that from the buck converter 104 Quadrature baseband waveform data obtained are:
$$\text{I.}=\text{A}\cdot \text{cos}\left(\mathrm{\varphi }\right);$$

$$\text{Q}=\text{A}\cdot \text{sin}\left(\mathrm{\varphi }\right);$$

$$\text{Peak amplitude A}={\left({\text{I.}}^{\mathrm{2nd}}+{\text{Q}}^{\mathrm{2nd}}\right)}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$\mathrm{2nd}$}\right.};$$

$$\text{Phase angle}\mathrm{\varphi }={\text{tan}}^{-1}\left(\text{Q}/\text{I.}\right);\text{and}$$

$$\text{frequency}=\left({\text{phase}}_{\text{n}+1}-{\text{phase}}_{\text{n}}\right)/\left(360*1/{\text{SR}}_{\text{D}}\right).$$

SR _D in equation (5) is the decimated sampling rate of the incoming bus signal.

One or more by the track generator 106 Generated time domain track (s) can by a decoder 108 be used to decode the serial bus signal. The decoder 108 can also be an input from a user input 110 receive. The user input 110 can be any component that enables a user to enter information into the system, such as a keyboard, mouse, joystick, or any other connected component. The input from the user input 110 can be received wired or wireless. The input from the user input 110 may contain information about a wireless modulation scheme, such as phase shift keying, frequency shift keying, frequency modulation, etc.

The decoder 108 can the serial bus signal with the help of the track generator 106 generated one or more track (s) and decode the user input into decoded data. The decoded data can be, for example, a binary signal. Based on the at the user entrance 110 received information regarding the wireless modulation scheme can the decoder 108 set one or more thresholds to determine a binary signal. In some embodiments, one or more threshold values are set by the user using user input 110 fixed rather than being determined by the wireless modulation scheme.

For example, a threshold value can be set at a specific frequency with the aid of a frequency-over-time track. All frequencies above the threshold frequency in the frequency-over-time track are decoded as a binary value of 1, and all frequencies below this frequency are decoded as a binary value of 0. However, the thresholds can be determined based on the phases, amplitudes, etc. of the signals, depending on the wireless modulation scheme and the thresholds identified by the user, and are not limited to frequencies only.

In some embodiments, more than one threshold can be set. For example, if three thresholds are used, any value below both thresholds can be decoded at 00, any value between the first threshold and the second threshold can be decoded as 01, any value between the second threshold and the third threshold can be decoded as 10, and can read all values above the third threshold as 11 be decoded. The embodiment of the disclosure is not limited to a single threshold, and any number of thresholds can be used as needed based on user input.

A trigger 112 can search the decoded data for a particular binary pattern and then trigger the acquisition of the decoded data when the particular binary pattern has been recognized. The respective binary pattern that is to be used as a trigger can be entered by the user via the user input 110 to be selected. As soon as the decoded data has been recorded, the testing and measuring instrument can process the data further, for example carry out additional measurements and analyzes or data on the display 114 view, or the trigger 112 can a memory 116 instruct to save the decoded data.

Similar to 1 can the testing and measuring instrument in 2nd one or more entrances 200 for receiving a modulated bus signal that has been modulated based on a wireless modulation scheme. The modulated bus signal can be through an analog-to-digital converter 202 be digitized. The trigger 204 can include, for example, a hardware trigger that can be configured to trigger on an edge of the input signal or a clock signal. If the trigger 204 detects an edge, the modulated bus signal can be detected. In some Embodiments can be the trigger 204 are triggered when a high-frequency signal is detected.

Similar to above regarding 1 described, the digitized signal in a digital down converter 206 downconverted to its in-phase (I) and quadrature-phase (Q) baseband component data.

A track generator 208 is the track generator 106 Similarly, and may receive the in-phase and quadrature-phase baseband component waveform data and derive one or more time domain traces, as mentioned above, which may illustrate how a particular property of the bus signal changes over time, as above with respect to FIG the track generator 106 discussed.

The one from the track generator 208 generated one or more time domain track (s) can be generated by a decoder 210 which is an input from a user input 212 , similar to user input 110 , can be used to decode the serial bus signal.

Similar to the discussion above, the decoder can 210 then the modulated serial bus signal with the help of the track generator 208 generated one or more track (s) and decode the user input into decoded data. The decoded data can be, for example, a binary signal. The decoded data can be sent to a viewfinder 214 can be sent, which can search for a specific binary pattern. As mentioned above, the particular binary pattern can be entered by a user in the user inputs 212 to provide. If the particular binary pattern is found in the captured waveform, the viewfinder can 214 accept the waveform and the waveform for storage in memory 216 , see full ad 218 or to another component, such as. B. one or more processors for further processing. However, if the particular binary pattern is not found in the captured waveform, the captured waveform is used by the viewfinder 214 rejected and not saved.

In some embodiments, the buck converter 206 , the track generator 208 , the decoder 210 and the viewfinder 214 each contained in one or more processors (not shown). The one or more processors can store instructions, for example in memory 216 to perform the down converter functions described above 206 , the track generator 208 , the decoder 210 and the viewfinder 214 to execute.

3rd FIG. 14 shows a flow diagram for decoding a bus signal based on a wireless modulation scheme using one of the methods shown in FIG 1 and 2nd shown embodiments was modulated.

In one process 300 a digitized, modulated bus signal is first downconverted to in-phase (I) and quadrature-phase (Q) baseband component waveform data. In one process 302 one or more time domain track (s) can be generated using the in-phase and quadrature-phase baseband component waveform data. For example, the one or more radio frequency-over-time track (s), as mentioned above, may include frequency-over-time, phase-over-time, or amplitude-over-time. The time domain tracks can also include in-phase and quadrature-phase baseband component information-over-time tracks.

An operation decodes using a received wireless modulation scheme 304 the modulated bus signal based on time domain traces in the process 302 were generated. For example, one or more threshold values can be defined for the time domain tracks in order to decode the bus signal into a binary signal. For the high frequency over time traces, the threshold values can be frequency, phase, or amplitude threshold values that are compared to the traces to determine whether the bus signal should be decoded into binary components.

Once the bus signal has been decoded, it can be done in one operation 306 a detection device such as either the trigger 112 or the viewfinder 214 , determine whether one or more triggering events are contained in the decoded signal. For example, the trigger 112 or the viewfinder 214 determine whether a certain bit stream is present in the decoded signal. If the triggering event is present, the decoded bus signal can be recorded and either stored in the memory, displayed or further processed by the testing and measuring instrument, as in the 1 and 2nd shown and as described above. If in the embodiment of 2nd the seeker 214 the finder cannot find the triggering event 214 discard the decoded bus signal.

In each of the embodiments discussed above, the decoding of the bus signal can continue on a periodic or continuous basis. That is, a large portion of the bus signal can be captured and then decoded, or the bus signal can be continuously decoded and analyzed for a triggering event when it is received.

Aspects of the disclosure may operate on specially designed hardware, firmware, digital signal processors, or on a specially programmed computer including a processor operating according to programmed instructions. The terms controller or processor used here are intended to include microprocessors, microcomputers, application-specific integrated circuits (ASICs) and dedicated hardware controllers. One or more aspects of the disclosure may be embodied in computer-usable data and computer-executable instructions, for example in one or more program modules that are executed by one or more computers (including monitoring modules) or other devices. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform certain tasks or implement certain abstract data types when executed by a processor in a computer or other device. The computer-executable instructions can be stored on a computer-readable storage medium, such as e.g. B. a hard disk, an optical disk, a removable disk, a solid-state memory, a working memory (RAM), etc. The functionality of the program modules can, as will be recognized by those skilled in the art, be combined or distributed in various ways. In addition, all or part of the functionality may be embodied in firmware or hardware equivalents such as integrated circuits, FPGA and the like. Certain data structures can be used to more effectively implement one or more aspects of the disclosure, and such data structures are contemplated within the computer-executable instructions and computer-usable data described herein.

The disclosed aspects may be implemented in hardware, firmware, software, or a combination thereof in some cases. The disclosed aspects can also be implemented in the form of instructions carried or stored on one or more or computer readable storage media that can be read and executed by one or more processors. Such instructions can be referred to as a computer program product. Computer-readable media, as discussed here, are all media that a computing device can access. As an example, and not as a limitation, computer readable media can be computer storage media and communication media.

Any medium that can be used to store computer-readable information is considered a computer storage medium. As an example, but not by way of limitation, computer storage media may include RAM, ROM, electrically erasable programmable read only memory (EEPROM), flash memory or other storage technologies, compact disc read only memory (CD-ROM), digital video disc (DVD) or other optical Disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, as well as any other volatile or non-volatile, removable or non-removable media that are implemented in any technology. Computer storage media exclude signals per se and transitory forms of signal transmission.

Communication media are all media that can be used for the transmission of computer-readable information. As an example, but not limited to, communication media may include coaxial cable, fiber optic cable, air, or other media suitable for the transmission of electrical, optical, radio frequency (RF), infrared, acoustic, or other types of signals .

EXAMPLES

Illustrative examples of the technologies disclosed herein are provided below. An embodiment of the technologies may include one or more and any combination of the examples described below.

Example 1 is a test and measurement instrument that includes a digital buck converter configured to receive a modulated bus signal that has been modulated based on a wireless modulation scheme and to output in-phase and quadrature-phase baseband component waveform data; a track generator configured to receive the in-phase and quadrature-phase baseband component waveform data and generate one or more tracks, the one or more tracks being a radio frequency over time track or in-phases and include quadrature phase over time traces; a decoder configured to decode the modulated bus signal based on the one or more tracks and a wireless modulation scheme; and a detection device configured to detect the modulated bus signal based on the decoded bus signal.

Example 2 is the test and measurement instrument of Example 1, wherein the decoder is configured to derive the bus signal based on the one or more tracks by determining at least one threshold and decoding the bus signal into a binary signal by comparing the one or decode multiple tracks with the at least one threshold.

Example 3 is the test and measurement instrument from Example 2, which also has user input configured to receive the at least one threshold.

Example 4 is the test and measurement instrument from Example 3, the at least one threshold being determined based on the wireless modulation scheme.

Example 5 is the test and measurement instrument of one of Examples 1-4, wherein the detection device comprises one or more processors configured to receive the decoded bus signal, to search for a triggering event in the decoded bus signal, to reject the modulated bus signal and detect a new modulated bus signal if the triggering event does not occur in the decoded bus signal and detect the modulated bus signal if the triggering event occurs in the decoded bus signal.

Example 6 is the testing and measuring instrument of one of Examples 1-5, the high-frequency over-time trace being at least one of an amplitude-over-time trace, a frequency-over-time trace and a phase-over-time Track includes.

Example 7 is the testing and measuring instrument from Example 6, the amplitude-over-time trace being at least one of a linear power-over-time trace, a logarithmic power-over-time trace and a linear amplitude-over-time Track includes.

Example 8 is the test and measurement instrument of one of Examples 1-7, the detection device being further configured to detect whether an event is present in the decoded bus signal and to detect the modulated bus signal when the event is detected.

Example 9 is a method for decoding a wirelessly received bus signal, comprising: downconverting a bus signal into in-phase and quadrature-phase baseband component waveform data; Generating at least one time domain track based on the in-phase and quadrature-phase baseband component waveform data; Decoding the bus signal into decoded data based on the at least one time domain track and a wireless modulation scheme; Detecting an event in the decoded bus signal; and detecting at least a portion of the decoded bus signal when the event is detected.

Example 10 is the method of Example 9, wherein the decoding of the bus signal comprises determining at least one threshold value and decoding the bus signal into a binary signal by comparing the at least one time domain track with the at least one threshold value.

Example 12 is the method of Example 10, which also includes receiving the at least one threshold from user input.

Example 13 is the method of Example 12, wherein the at least one threshold is determined based on the wireless modulation scheme.

Example 14 is the method of one of Examples 9-13, further comprising rejecting the portion of the decoded bus signal and detecting a new bus signal if the event was not recognized.

Example 15 is the method of one of Examples 9-14, wherein the at least one time domain track is a radio frequency-over-time track including an amplitude-over-time track, a frequency-over-time track, and a phase-over-time Track includes.

Example 16 is the method of Example 15, wherein the amplitude-over-time track comprises at least one of a linear power-over-time track, a logarithmic power-over-time track, and a linear amplitude-over-time track .

Example 17 is one or more computer readable storage media with instructions that, when executed by one or more processors of a test and measurement instrument, cause the test and measurement instrument to receive a wirelessly received bus signal in in-phase and quadrature-phase baseband components -Convert waveform data; generate at least one track based on the in-phase and quadrature-phase baseband component waveform data; decode the bus signal into decoded data based on the track and a wireless modulation scheme; determine if there is an event in the decoded bus signal; and store the decoded bus signal if the event is detected and discard the decoded bus signal if the event is not detected.

Example 18 is the one or more computer readable storage media of Example 17, wherein decoding the bus signal by determining at least one threshold and decoding the bus signal into a binary signal Comparing the track with the at least one threshold value comprises.

Example 19 is one or more computer-readable storage media from one of Examples 17 or 18, the at least one track being at least one of an amplitude-over-time track, a frequency-over-time track, a phase-over-time track, an in-phase baseband component-over-time trace and a quadrature-phase baseband component-over-time trace.

Example 20 is the one or more computer readable storage media of Example 19, wherein the amplitude-over-time trace is at least one of a linear power-over-time trace, a logarithmic power-over-time trace, and a linear amplitude-over trace -Time track includes.

The previously described versions of the disclosed subject matter have many advantages that have either been described or would be apparent to those skilled in the art. However, these advantages or features are not required in all versions of the disclosed devices, systems or methods.

In addition, special features are pointed out in this written description. It is to be understood that the disclosure in this specification encompasses all possible combinations of these special features. If a particular feature is disclosed in the context of a particular point of view or example, that feature may, where possible, also be used in connection with other aspects and examples.

Even if this application refers to a method with two or more defined steps or processes, the defined steps or processes can be carried out in any order or simultaneously, unless the context excludes these possibilities.

Although specific examples of the invention have been shown and described for purposes of illustration, it is believed that various modifications can be made without departing from the spirit and scope of the invention. Accordingly, the invention should not be limited except as by the appended claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 62794528 [0001]

Claims (19)

A test and measurement instrument consisting of: a digital down converter configured to receive a modulated bus signal that has been modulated based on a wireless modulation scheme and to output in-phase and quadrature-phase baseband component waveform data; a trace generator configured to receive the in-phase and quadrature-phase baseband component waveform data and to generate one or more traces, the one or more traces being a radio frequency time trace or In - contain phase and quadrature phase time trace, a decoder configured to decode the modulated bus signal based on one or more tracks and a wireless modulation scheme; and a detection device configured to detect the modulated bus signal based on the decoded bus signal. Testing and measuring instrument after Claim 1 wherein the decoder is configured to decode the bus signal based on the one or more tracks by determining at least one threshold and decoding the bus signal into a binary signal by comparing the one or more tracks with the at least one threshold. The testing and measuring instrument after Claim 2 , further comprising user input configured to receive at least one threshold. The test and measurement instrument after Claim 2 wherein the at least one threshold is determined based on the wireless modulation scheme. Testing and measuring instrument after Claim 1 wherein the detection device includes one or more processors configured to receive the decoded bus signal, look for a triggering event in the decoded bus signal, reject the modulated bus signal, and detect a new modulated bus signal if the triggering event is not in the decoded bus signal occurs, and detect the modulated bus signal when the triggering event occurs in the decoded bus signal. Test and measuring instrument after Claim 1 , in which the radio frequency-time curve has at least one of the following properties: amplitude-time curve, frequency-time curve and phase-time curve. Testing and measuring instrument after Claim 6 , in which the amplitude-time curve contains at least one of the following tracks: linear power / time curve, logarithmic power / time curve and linear amplitude-time curve. the testing and measuring instrument Claim 1 , wherein the detection device is further configured to detect whether an event is present in the decoded bus signal and to detect the modulated bus signal when the event is detected. A method of decoding a wirelessly received bus signal, comprising: Down-converting a bus signal to in-phase and quadrature baseband component waveform data; Generating at least one time domain curve based on the in-phase and quadrature baseband component waveform data; decoding the bus signal into decoded data based on the at least one time domain track and a wireless modulation scheme; Detection of an event in the decoded bus signal; and Detection of at least part of the decoded bus signal when the event is detected. Procedure according to Claim 9 , wherein the decoding of the bus signal comprises the determination of at least one threshold value and the decoding of the bus signal into a binary signal by comparing the at least one time-domain track with the at least one threshold value. The method of Claim 10 that further includes receiving at least one threshold from user input. Procedure according to Claim 10 wherein the at least one threshold is determined based on the wireless modulation scheme. The procedure after Claim 9 also includes rejecting the portion of the decoded bus signal and detecting a new bus signal if the event is not recognized. Procedure according to Claim 9 , wherein the at least one time domain curve contains a radio frequency-time curve including an amplitude-time curve, a frequency-time curve and a phase-time curve. Procedure according to Claim 14 , in which the amplitude-time curve has at least one of the following properties: linear power / time curve, logarithmic power / time curve and linear amplitude / time curve. One or more computer-readable storage media with instructions that, when executed by one or more processors of a test and measurement instrument, cause the test and measurement instrument to: downconvert a wirelessly received bus signal into in-phase and quadrature-phase baseband component waveform data; generate at least one track based on the in-phase and quadrature baseband component waveform data, decode the bus signal into decoded data based on the track and a wireless modulation scheme; determine whether an event is included in the decoded bus signal; and store the decoded bus signal if the event is detected and reject the decoded bus signal if the event is not detected. One or more computer-readable storage media Claim 16 , wherein the decoding of the bus signal comprises the determination of at least one threshold value and the decoding of the bus signal into a binary signal by comparing the track with the at least one threshold value. One or more computer-readable storage media Claim 16 , wherein the at least one track contains at least one of the following tracks: amplitude-time track, frequency-time track, phase-time track, in-phase baseband component-time track and quadrature-phase baseband component-time track . One or more computer-readable storage media Claim 18 , wherein the amplitude-time curve contains at least one of the linear power / time curve, the logarithmic power / time curve and the linear amplitude-time curve.

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