CN113872709B - System for continuously monitoring presence or absence of high-speed signal - Google Patents
System for continuously monitoring presence or absence of high-speed signal Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 74
- 238000005070 sampling Methods 0.000 claims abstract description 51
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 238000009825 accumulation Methods 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 8
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- 238000001514 detection method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
Abstract
The application provides a system for continuously monitoring whether a high-speed signal exists or not, which relates to the technical field of high-speed signal monitoring, and the method comprises the following steps: the device comprises a main control unit, a high-speed signal acquisition unit, a signal dispersion calculation unit and a filtering and judging unit; the main control unit: controlling data sampling and export of the high-speed signal acquisition unit, and controlling numerical calculation of the signal dispersion calculation unit and the filtering and judging unit; high-speed signal acquisition unit: the device comprises a high-speed SAR (successive approximation register type) ADC (analog-to-digital converter) sampling and data deriving circuit; signal dispersion calculating unit: calculating the average value and the average difference of the data of the sampling points of the high-speed SAR ADC; and a filtering and judging unit: the method comprises the steps of judging whether a signal exists or not according to a hysteresis threshold, accumulating the number of continuous periods of the signal, and outputting a judgment result of whether the signal exists or not. The application can reduce the resource requirement on MCU (micro control unit) and corresponding circuit, shorten the judging time of whether the signal exists or not, and reduce the misjudging rate of whether the signal exists or not.
Description
Technical Field
The application relates to the technical field of high-speed signal monitoring, in particular to a system for continuously monitoring whether a high-speed signal exists or not.
Background
The monitoring of the presence or absence of high speed signals is important for the reporting of LOS (LOSs of signal) in high speed communication systems, and for the operation associated with LOS in high speed communication systems.
The application patent with publication number CN107800512A discloses a signal detection device and method, comprising: the system comprises a signal monitoring module and a signal processing module. The signal processing module is connected in series on the high-speed data path, the input end of the signal monitoring module is connected with the high-speed data path, and the output end of the signal monitoring module is connected with the signal processing module. When the signal monitoring module detects that no effective signal is transmitted in the high-speed signal path, transmitting a detection result to the signal processing module, wherein the signal processing module is in a standby power saving mode; when the signal monitoring module detects that the low-frequency periodic signal LFPS is transmitted in the high-speed signal path, the signal processing module does not perform any amplitude attenuation processing on the input signal; when the signal monitoring module detects that the high-speed data packet signal is transmitted in the high-speed signal path, the signal processing module correspondingly processes the input signal according to the pre-configuration.
At present, whether a plurality of high-speed signals exist or not is monitored by calculating the variance or standard deviation of signal sampling point data, if the calculation is realized by a solidified digital hardware circuit, the complexity requirement on the hardware circuit is higher, and if the calculation is realized by MCU software programming, the resource requirement and the resource occupation on the MCU are higher.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a system for continuously monitoring whether a high-speed signal exists or not.
The application provides a system for continuously monitoring the presence or absence of a high-speed signal, which comprises the following steps:
a system for continuously monitoring for the presence of high-speed signals, the system comprising: the device comprises a main control unit, a high-speed signal acquisition unit, a signal dispersion calculation unit and a filtering and judging unit;
the main control unit: controlling data sampling and export of the high-speed signal acquisition unit, and controlling numerical calculation of the signal dispersion calculation unit and the filtering and judging unit;
high-speed signal acquisition unit: the high-speed SAR ADC sampling circuit comprises a high-speed SAR ADC sampling circuit and a data deriving circuit, wherein the output end of the high-speed SAR ADC sampling circuit is connected with the input end of the data deriving circuit;
signal dispersion calculating unit: the output end of the data deriving circuit is connected, and the average value and the average difference of the data of the sampling points of the high-speed SAR ADC are calculated;
and a filtering and judging unit: and judging whether the signal exists or not according to the hysteresis threshold based on the average value and the average difference, and accumulating the number of continuous periods of the signal.
Preferably, the main control unit, the signal dispersion calculating unit and the filtering and judging unit are all realized by software programming of an MCU or realized by a solidified digital circuit.
Preferably, the high-speed SAR ADC sampling in the high-speed signal acquisition unit comprises: the high-speed signal is directly sampled, or a certain path of output signal after the high-speed signal is subjected to frequency reduction is sampled.
Preferably, the data deriving circuit in the high-speed signal acquisition unit needs to send a section of continuous high-speed SAR ADC sampling point data to the signal dispersion calculating unit, and store the data in the buffer, where the sampling point corresponding to the high-speed SAR ADC sampling point data needs to embody the overall amplitude characteristic of the signal.
Preferably, the signal dispersion calculating unit includes:
calculating an arithmetic average value of the acquired continuous high-speed SAR ADC sampling point data;
and calculating absolute values of the dispersion of all the high-speed SAR ADC sampling point data and the arithmetic mean value, accumulating the absolute values of all the dispersion, and calculating the mean value to obtain an average difference which is used for representing the signal dispersion.
Preferably, in the filtering and deciding unit: the hysteresis threshold comprises a signal dispersion high threshold and a signal dispersion low threshold, and both the two thresholds can be configured;
accumulation of the number of no-signal duration cycles: the maximum limit value of the no-signal duration period is related, and the maximum limit value of the no-signal duration period can be configured;
the signal presence/absence judgment result is the current state, and the acquisition of the signal presence/absence judgment result is dependent on the signal dispersion of the previous state and the current period.
Preferably, the filtering and judging logic of the filtering and judging unit is as follows:
when the previous state is a signal, if the signal dispersion of the period is smaller than the signal dispersion low threshold, the number of the no-signal continuous periods is increased by 1;
if the updated no-signal duration period number exceeds the maximum limit value of the no-signal duration period, the no-signal duration period number is limited to the maximum limit value, the current state output result is no signal, and otherwise, the current state output result is a signal.
Preferably, when the previous state is a signal, if the signal dispersion of the current period is not less than the signal dispersion low threshold, the number of continuous periods of no signal is reduced by 1, and the output result of the current state is a signal;
if the updated number of no-signal duration cycles is less than 0, the number of no-signal duration cycles is limited to 0.
Preferably, when the previous state is no signal, if the signal dispersion of the period is greater than the signal dispersion high threshold, the no-signal duration period number is reduced by 1;
if the updated no-signal duration period number is smaller than 0, the no-signal duration period number is limited to 0, the current state output result is a signal, and otherwise, the current state output result is no signal.
Preferably, when the previous state is no signal, if the signal dispersion of the present period is not greater than the signal dispersion high threshold, the number of continuous periods of no signal is increased by 1, and the output result of the current state is no signal;
if the updated no-signal duration period exceeds the maximum limit value of the no-signal duration period, the no-signal duration period is limited to the maximum limit value.
Compared with the prior art, the application has the following beneficial effects:
1. the application can rapidly judge whether the signal exists or not, reduce the time and space complexity of calculation by adopting MCU or corresponding circuit, reduce the resource requirement for MCU and corresponding circuit, and shorten the judgment time of whether the signal exists or not;
2. by adopting a mode of hysteresis judgment and accumulation on the 'no-signal continuous period number', jitter in signal sampling data is filtered, and the misjudgment rate of whether the signal exists or not is reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a diagram of the overall structure of the present application;
fig. 2 is a schematic diagram of filtering and decision logic.
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
An embodiment of the present application provides a system for continuously monitoring whether a high-speed signal exists, which is shown in fig. 1, and includes: the system comprises a main control unit, a high-speed signal acquisition unit, a signal dispersion calculation unit and a filtering and judging unit.
The main control unit is used for periodically controlling the data sampling and the export of the high-speed signal acquisition unit, controlling the numerical computation of the signal dispersion computation unit and the filtering and judging unit, and can be realized by software programming of an MCU (micro control unit) or by a solidified digital circuit.
High-speed signal acquisition unit: the system comprises a high-speed SAR ADC sampling circuit and a data deriving circuit; the output end of the high-speed SAR ADC sampling circuit is connected with the input end of the data deriving circuit; the high-speed SAR ADC sampling can be direct sampling of a high-speed signal, or sampling of a certain path of output signal after the high-speed signal is subjected to frequency reduction.
The data export circuit is required to send a section of continuous high-speed SAR ADC sampling point data to the signal dispersion calculation unit and store the data in the buffer memory, the number of sampling points corresponding to the section of continuous sampling point data is not excessively small, and the sampling points corresponding to the high-speed SAR ADC sampling point data are required to embody the integral amplitude characteristic of the signal.
Signal dispersion calculating unit: and connecting the output end of the data deriving circuit to obtain high-speed SAR ADC sampling point data, and calculating the average value and average difference of the high-speed SAR ADC sampling point data.
The signal dispersion calculating unit firstly calculates an arithmetic average value of the acquired continuous high-speed SAR ADC sampling point data, then calculates absolute values of dispersion of all the high-speed SAR ADC sampling point data and the arithmetic average value, accumulates the absolute values of all the dispersion, and calculates an average value to obtain an average difference, wherein the average difference is used for representing the signal dispersion, and the specific formula is as follows:
where MD is the average difference, Σ is the summed sign, x i For SAR ADC sampling point data, < >>The data is the arithmetic average number of the SAR ADC sampling point data, and n is the data of the SAR ADC sampling point data. The signal dispersion calculating unit can be realized by software programming of an MCU or can be realized by a solidified digital circuit.
And a filtering and judging unit: and comparing the average difference with a hysteresis comparison threshold based on the average difference, judging whether the signal exists or not, accumulating the number of signal duration periods, and outputting a final signal judgment result or not.
In order to prevent continuous and repeated changes of the comparison result of the average difference and the magnitude of the decision threshold when the average difference of the signals is continuous near the decision threshold, the decision threshold adopts a hysteresis comparison threshold. The hysteresis comparison threshold comprises a signal dispersion high threshold and a signal dispersion low threshold, and both thresholds are configurable. The value of the signal dispersion high threshold is larger than that of the signal dispersion low threshold, the signal dispersion high threshold is used for judging whether the signal is from none to some, and the signal dispersion low threshold is used for judging whether the signal is from the existence to the nonexistence; the accumulation of the number of signal-free duration periods relates to a maximum limit value of the number of signal-free duration periods, which is configurable; the signal has or not a judging result is the current state, and the acquisition of the signal needs to depend on the previous state (namely the judging result of the previous period) and the signal dispersion of the current period. The filtering and judging unit can be realized by software programming of an MCU or by a solidified digital circuit.
Referring to fig. 2, the filtering and decision logic of the filtering and decision unit is as follows:
when the previous state is 'signal-present', if the signal dispersion of the current period is smaller than the signal dispersion low threshold, the 'no-signal continuous period number' is increased by 1, if the updated 'no-signal continuous period number' exceeds the maximum limit value of the no-signal continuous period, the 'no-signal continuous period number' is limited to the maximum limit value, the current state output result is 'no signal', otherwise, the current state output result is 'signal-present';
if the signal dispersion of the present period is not less than the signal dispersion low threshold, the number of the no-signal continuous periods is reduced by 1, and the current output result is the signal, and if the updated number of the no-signal continuous periods is less than 0, the number of the no-signal continuous periods is limited to 0.
When the previous state is no signal, if the signal dispersion of the current period is larger than the signal dispersion high threshold, the no signal duration period number is reduced by 1, if the updated no signal duration period number is smaller than 0, the no signal duration period number is limited to 0, the current state output result is a signal, otherwise, the current state output result is no signal;
if the signal dispersion of the present period is not greater than the signal dispersion high threshold, the number of no-signal continuous periods is increased by 1, and the current output result is no-signal, and if the updated number of no-signal continuous periods exceeds the maximum limit value of the no-signal continuous periods, the number of no-signal continuous periods is limited to the maximum limit value.
The implementation principle is as follows: under the control of a main control unit, a high-speed signal acquisition unit performs SAR ADC sampling on a high-speed signal in each period, a section of continuous SAR ADC sampling point data is sent to a signal dispersion calculation unit, the average difference of the sampling point data is calculated and used for representing the signal dispersion of the high-speed signal, the signal dispersion is sent to a filtering and judging unit, the size comparison is performed between the signal dispersion and a signal dispersion high threshold and a signal dispersion low threshold, the calculation result of the previous period is combined, the judgment result of the existence of the signal in the period is finally obtained, meanwhile, the calculation result of the period is also saved, and the calculation result of the existence of the signal in the next period is used for calculating the judgment result.
The embodiment of the application provides a system for continuously monitoring whether a high-speed signal exists or not, which achieves the aim of rapidly judging whether the signal exists or not by adopting a mode of calculating average difference to represent signal dispersion, reduces the time and space complexity of calculating by adopting an MCU or a corresponding circuit, reduces the resource requirements on the MCU and the corresponding circuit, and shortens the judging time of whether the signal exists or not. By adopting a mode of hysteresis judgment and accumulation on the 'no-signal continuous period number', jitter in signal sampling data is filtered, and the misjudgment rate of whether the signal exists or not is reduced.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (9)
1. A system for continuously monitoring the presence of high-speed signals, comprising: the device comprises a main control unit, a high-speed signal acquisition unit, a signal dispersion calculation unit and a filtering and judging unit;
the main control unit: controlling data sampling and export of the high-speed signal acquisition unit, and controlling numerical calculation of the signal dispersion calculation unit and the filtering and judging unit;
high-speed signal acquisition unit: the high-speed SAR ADC sampling circuit comprises a high-speed SAR ADC sampling circuit and a data deriving circuit, wherein the output end of the high-speed SAR ADC sampling circuit is connected with the input end of the data deriving circuit;
signal dispersion calculating unit: connecting the output end of the data deriving circuit to obtain high-speed SAR ADC sampling point data, and calculating the average value and average difference of the high-speed SAR ADC sampling point data;
and a filtering and judging unit: judging whether a signal exists or not according to a hysteresis threshold based on the average value and the average difference, and accumulating the number of continuous periods of the signal;
the filtering and judging unit comprises: the hysteresis threshold comprises a signal dispersion high threshold and a signal dispersion low threshold, and both the two thresholds can be configured;
accumulation of the number of no-signal duration cycles: the maximum limit value of the no-signal duration period is related, and the maximum limit value of the no-signal duration period can be configured;
the signal presence/absence judgment result is the current state, and the acquisition of the signal presence/absence judgment result is dependent on the signal dispersion of the previous state and the current period.
2. The system for continuously monitoring the presence of high-speed signals according to claim 1, wherein the main control unit, the signal dispersion calculating unit and the filtering and judging unit are all realized by software programming of an MCU or realized by a solidified digital circuit.
3. The system for continuously monitoring the presence of high-speed signals according to claim 1, wherein the high-speed SAR ADC sampling in the high-speed signal acquisition unit comprises: the high-speed signal is directly sampled, or a certain path of output signal after the high-speed signal is subjected to frequency reduction is sampled.
4. The system for continuously monitoring the presence of high-speed signals according to claim 1, wherein the data deriving circuit in the high-speed signal acquisition unit is configured to send a segment of continuous high-speed SAR ADC sampling point data to the signal dispersion calculating unit, and store the continuous high-speed SAR ADC sampling point data in the buffer, and the sampling points corresponding to the high-speed SAR ADC sampling point data are configured to embody the overall amplitude characteristics of the signals.
5. The system for continuously monitoring the presence of high-speed signals according to claim 1, wherein said signal dispersion calculating unit comprises:
calculating an arithmetic average value of the acquired continuous high-speed SAR ADC sampling point data;
and calculating absolute values of the dispersion of all the high-speed SAR ADC sampling point data and the arithmetic mean value, accumulating the absolute values of all the dispersion, and calculating the mean value to obtain an average difference which is used for representing the signal dispersion.
6. The system for continuously monitoring the presence of high speed signals according to claim 1, wherein the filtering and decision logic of said filtering and decision unit is as follows:
when the previous state is a signal, if the signal dispersion of the period is smaller than the signal dispersion low threshold, the number of the no-signal continuous periods is increased by 1;
if the updated no-signal duration period number exceeds the maximum limit value of the no-signal duration period, the no-signal duration period number is limited to the maximum limit value, the current state output result is no signal, and otherwise, the current state output result is a signal.
7. The system according to claim 6, wherein when the previous state is signal, if the signal dispersion of the present period is not less than the signal dispersion low threshold, the number of continuous periods of no signal is reduced by 1, and the current state output result is signal;
if the updated number of no-signal duration cycles is less than 0, the number of no-signal duration cycles is limited to 0.
8. The system of claim 7, wherein when the previous state is no signal, if the signal dispersion of the present period is greater than a signal dispersion high threshold, the number of no signal duration periods is reduced by 1;
if the updated no-signal duration period number is smaller than 0, the no-signal duration period number is limited to 0, the current state output result is a signal, and otherwise, the current state output result is no signal.
9. The system according to claim 8, wherein when the previous state is no signal, if the signal dispersion of the present period is not greater than the signal dispersion high threshold, the number of continuous periods of no signal is increased by 1, and the current state output result is no signal;
if the updated no-signal duration period exceeds the maximum limit value of the no-signal duration period, the no-signal duration period is limited to the maximum limit value.
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