CN107241120B - Method and device for acquiring zero setting threshold value in broadband power line communication - Google Patents
Method and device for acquiring zero setting threshold value in broadband power line communication Download PDFInfo
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- CN107241120B CN107241120B CN201610177018.8A CN201610177018A CN107241120B CN 107241120 B CN107241120 B CN 107241120B CN 201610177018 A CN201610177018 A CN 201610177018A CN 107241120 B CN107241120 B CN 107241120B
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Abstract
The invention discloses a method and a device for acquiring a zero setting threshold value in broadband power line communication. Wherein, the method comprises the following steps: detecting a first signal power of a target modulation signal loaded to the power communication line; acquiring a preset model for describing an incidence relation between signal power and a zero setting threshold value; and determining a zero setting threshold value of the target modulation signal based on the preset model and the first signal power. The invention solves the technical problem that the optimal zero setting threshold value in the broadband power communication cannot be accurately determined in the related technology.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a device for acquiring a zero setting threshold value in broadband power line communication.
Background
The high intensity and burstiness of the impulse interference has a great impact on the performance of the power line communication system, the pulse interference suppression technology is widely paid attention, the zero setting technology is the simplest and most effective pulse interference suppression technology and is widely applied to the broadband power line communication system, the selection of the zero setting threshold value directly influences the performance of the zero setting technology, if the threshold value is too small, the useful signal can be eliminated, if the threshold value is too large, the interference suppression effect is not obvious, at present, the selection of the threshold value in the zero setting technology is only obtained by the ideal state defined by experience, these thresholds need to be re-estimated continuously for the impulse interference of different occurrence probabilities and different signal-to-interference ratio situations, and in the actual broadband power line communication system, the impulse interference is variable and bursty, these parameter characteristics are difficult to estimate, and therefore, how to determine the optimal threshold value in a variable environment is a big bottleneck faced by the impulse interference suppression.
Aiming at the technical problem that the optimal zero setting threshold value in the broadband power communication cannot be accurately determined in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for acquiring a zero setting threshold value in broadband power line communication, which at least solve the technical problem that the optimal zero setting threshold value in broadband power line communication cannot be accurately determined in the related technology.
According to an aspect of an embodiment of the present invention, a method for acquiring a zeroing threshold in broadband power line communication is provided, where the method includes: detecting a first signal power of a target modulation signal loaded to the power communication line; acquiring a preset model for describing an incidence relation between signal power and a zero setting threshold value; and determining a zero setting threshold value of the target modulation signal based on the preset model and the first signal power.
Further, obtaining a preset model for describing an association relationship between the signal power and the zero setting threshold value includes: loading a plurality of test modulation signals to a first end of a power communication line, respectively, wherein any two of the plurality of test modulation signals have different signal powers; acquiring a target threshold set corresponding to each test modulation signal, wherein each target threshold set comprises a plurality of zero setting thresholds which enable the error rate of the signal received by the second end of the power communication line to be zero; determining threshold parameters of each target threshold set according to a preset algorithm; and performing linear fitting on the signal power of each test modulation signal and the threshold parameter of each target threshold set to determine a linear relation for representing the preset model.
Further, obtaining a target threshold set corresponding to each test modulation signal includes: the method comprises the steps that under the condition that the occurrence probability of pulse interference of an electric power communication line is a first preset value, a second preset value in a preset signal-to-interference ratio set is obtained, the preset signal-to-interference ratio set comprises a plurality of preset values of the pulse interference signal-to-interference ratio, a first threshold value set corresponds to each preset value of the pulse interference signal-to-interference ratio, the first threshold value set comprises a plurality of zero setting threshold values enabling the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference signal-to-interference ratio is the corresponding preset value, and the number of the zero setting threshold values in the first threshold value set corresponding to the second preset value is not more than the number of the zero setting threshold values in the first threshold value set corresponding to any preset value; under the condition that the pulse interference signal-to-interference ratio of the electric power communication line is a second preset value, acquiring a plurality of second threshold value sets corresponding to a probability set, wherein the probability set comprises preset probabilities of a plurality of pulse interference occurrence probabilities, each preset probability corresponds to one second threshold value set, and the second threshold value sets comprise a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference occurrence probabilities are the corresponding preset probabilities; and setting the minimum number of zero thresholds in the plurality of second threshold value sets as a target threshold value set.
Further, determining the threshold parameters of each target threshold set according to a preset algorithm includes: calculating the average value of the zero threshold values in the target threshold value set according to an average value algorithm; and taking the average value of the zero thresholds in the target threshold set as a threshold parameter.
Further, linearly fitting the signal power of each test modulated signal to the threshold parameters of each target threshold set to determine a linear relationship representing the predetermined model comprises: taking the arithmetic square root of the signal power of each test modulation signal and the threshold parameter of each test modulation signal as a set of data; and performing least square normal linear fitting on the multiple groups of data obtained by the multiple pairs of data to obtain a linear relation.
According to another aspect of the embodiments of the present invention, there is provided an apparatus for acquiring a zeroing threshold in broadband power line communication, the apparatus including: a detection unit for detecting a first signal power of a target modulation signal loaded to the power communication line; the acquisition unit is used for acquiring a preset model for describing the incidence relation between the signal power and the zero setting threshold value; and the determining unit is used for determining the zero setting threshold value of the target modulation signal based on the preset model and the first signal power.
Further, the acquisition unit includes: the loading module is used for loading the plurality of test modulation signals to the first end of the power communication line respectively, and the signal power of any two of the plurality of test modulation signals is different; the acquisition module is used for acquiring a target threshold set corresponding to each test modulation signal, wherein each target threshold set comprises a plurality of zero setting thresholds which enable the error rate of the signal received by the second end of the power communication line to be zero; the determining module is used for determining the threshold parameters of each target threshold set according to a preset algorithm; and the processing module is used for performing linear fitting on the signal power of each test modulation signal and the threshold parameter of each target threshold set so as to determine a linear relation for representing the preset model.
Further, the acquisition module includes: the first obtaining submodule is used for obtaining a second preset value in a preset signal-to-interference ratio set under the condition that the occurrence probability of pulse interference of the electric power communication line is a first preset value, the preset signal-to-interference ratio set comprises a plurality of preset values of the pulse interference signal-to-interference ratio, a first threshold value set corresponds to each preset value of the pulse interference signal-to-interference ratio, the first threshold value set comprises a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference signal-to-interference ratio is the corresponding preset value, and the number of zero threshold values in the first threshold value set corresponding to the second preset value is not more than the number of zero threshold values in the first threshold value set corresponding to any preset value in the preset signal-to-interference ratio set; the second obtaining submodule is used for obtaining a plurality of second valve value sets corresponding to the probability set under the condition that the pulse interference signal-to-interference ratio of the electric power communication line is a second preset value, wherein the probability set comprises preset probabilities of a plurality of pulse interference occurrence probabilities, each preset probability corresponds to one second valve value set, and the second valve value sets comprise a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference occurrence probabilities are the corresponding preset probabilities; and the first processing submodule is used for taking the minimum number of zero thresholds in the plurality of second threshold value sets as a target threshold value set.
Further, the determining module includes: the determining submodule is used for determining the threshold parameters of each target threshold set according to a preset algorithm, and comprises the following steps: the calculating submodule is used for calculating the average value of the zero threshold values in the target threshold value set according to an average value algorithm; and the second processing sub-module is used for taking the average value of the zero thresholds in the target threshold set as a threshold parameter.
Further, the processing module includes: a third processing submodule for taking the arithmetic square root of the signal power of each test modulated signal and the threshold parameter of each test modulated signal as a set of data; and the fourth processing submodule is used for performing least square normal fitting on multiple groups of data obtained by multiple pairs of data pairs to obtain a linear relation.
In the embodiment of the invention, when the zero setting threshold value of the system needs to be adjusted, the first signal power of the target modulation signal loaded to the power communication line is detected; and acquiring a preset model for describing the incidence relation between the signal power and the zero setting threshold value, namely determining the zero setting threshold value of the target modulation signal based on the preset model and the first signal power, thereby solving the technical problem that the optimal zero setting threshold value in the broadband power communication cannot be accurately determined in the related technology, and realizing the technical effect of accurately acquiring the optimal zero setting threshold value in the broadband power communication.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a method for acquiring a zeroing threshold in broadband power line communication according to an embodiment of the present invention; and
fig. 2 is a schematic diagram of an apparatus for acquiring a zero threshold in broadband power line communication according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for acquiring a zero threshold in broadband power line communication, where the steps illustrated in the flowchart of the drawings may be executed in a computer system, such as a set of computer executable instructions, and although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be executed in an order different from that shown.
Fig. 1 is a flowchart of a method for acquiring a zeroing threshold in broadband power line communication according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
in step S101, a first signal power of a target modulation signal loaded to a power communication line (i.e., a broadband power line) is detected.
Step S102, acquiring a preset model for describing the incidence relation between the signal power and the zero setting threshold value.
And step S103, determining a zero setting threshold value of the target modulation signal based on the preset model and the first signal power.
With the above embodiment, when the zero setting threshold of the system needs to be adjusted, the first signal power of the target modulation signal loaded to the power communication line is detected; and acquiring a preset model for describing the incidence relation between the signal power and the zero setting threshold value, namely determining the zero setting threshold value of the target modulation signal based on the preset model and the first signal power, thereby solving the technical problem that the optimal zero setting threshold value in the broadband power communication cannot be accurately determined in the related technology, and realizing the technical effect of accurately acquiring the optimal zero setting threshold value in the broadband power communication.
In the embodiment of step S102, obtaining the preset model for describing the association relationship between the signal power and the zero setting threshold value may include: loading a plurality of test modulation signals to a first end of a power communication line, respectively, wherein any two of the plurality of test modulation signals have different signal powers; acquiring a target threshold set corresponding to each test modulation signal, wherein each target threshold set comprises a plurality of zero setting thresholds which enable the error rate of the signal received by the second end of the power communication line to be zero; determining threshold parameters of each target threshold set according to a preset algorithm; and performing linear fitting on the signal power of each test modulation signal and the threshold parameter of each target threshold set to determine a linear relation for representing the preset model.
The test modulation signals are test modulation signals with different powers, the initial value of the signal power is px, and the powers of the test modulation signals are integer multiples of px. If px is 0.00027245w (w is power unit, i.e. watt), the number of test modulation signals is 13, and the signal selection multiple set k is as follows:
k is {4,9,16,25,64,100,225,400,900,1600,2500,6400,10000}, and the index of the signal can be set to i, then for any test modulated signal PX (i), its power is "PX k (i)", e.g., PX (1) is 0.0010898w and PX (5) is 0.0174368 w.
During testing, the zero setting threshold values of the 13 test modulation signals may be tested one by one to obtain a corresponding target threshold value set, and obtaining the target threshold value set corresponding to each test modulation signal may be implemented by the following method: the method comprises the steps that under the condition that the occurrence probability of pulse interference of an electric power communication line is a first preset value, a second preset value in a preset signal-to-interference ratio set is obtained, the preset signal-to-interference ratio set comprises a plurality of preset values of the pulse interference signal-to-interference ratio, a first threshold value set corresponds to each preset value of the pulse interference signal-to-interference ratio, the first threshold value set comprises a plurality of zero setting threshold values enabling the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference signal-to-interference ratio is the corresponding preset value, and the number of the zero setting threshold values in the first threshold value set corresponding to the second preset value is not more than the number of the zero setting threshold values in the first threshold value set corresponding to any preset value; under the condition that the pulse interference signal-to-interference ratio of the electric power communication line is a second preset value, acquiring a plurality of second threshold value sets corresponding to a probability set, wherein the probability set comprises preset probabilities of a plurality of pulse interference occurrence probabilities, each preset probability corresponds to one second threshold value set, and the second threshold value sets comprise a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference occurrence probabilities are the corresponding preset probabilities; and setting the minimum number of zero thresholds in the plurality of second threshold value sets as a target threshold value set.
For example, for testing modulated signal PX (1), an impulse interference occurrence probability of 0.35 (i.e., a first preset value) may be selected, and if the preset set of signal-to-interference ratios is { -40dB, -30dB, -20dB, -10dB, -5dB,0dB }, each preset value in the preset set of signal-to-interference ratios may be tested one by one, e.g., if the signal-to-interference ratio is-40 dB, threshold th may be initialized to 0, if the threshold th is 0, it is checked whether the error rate of the signal received at the second end of the power communication line is 0, if 0, the threshold th of 0 is stored in the first set of signal-to-40 dB signal-to-interference ratios, if the error rate of the signal received at the second end of the power communication line is not 0, the value of threshold th is increased by a fixed value (e.g., 0.01, 0.001, etc.) until the threshold th is set between 0 and 30, which enables the error rate of the signal received at the second end of the power communication line to be, thus, a first threshold set of-40 dB signal-to-interference ratios is obtained, and then the first threshold sets corresponding to other signal-to-interference ratios in the preset signal-to-interference ratio set are obtained through one-by-one test.
For the test modulation signal PX (1), after obtaining the first threshold set corresponding to each of the pulse interference signal-to-interference ratios in the preset signal-to-interference ratio set, it is equivalent to determining 6 first threshold sets corresponding to the test modulation signal PX (1), then calculating the number of elements (i.e., zero setting thresholds) in the 6 first threshold sets, respectively, and taking the pulse interference signal-to-interference ratio corresponding to the first threshold set with the least number of elements as the second preset value.
It should be noted that, under the condition that the occurrence probability of the impulse interference and the Signal-to-interference ratio are determined, the corresponding zero setting threshold is in a certain interval, since the occurrence probability of the impulse interference is always a fixed value, the obtaining of the first threshold set is equivalent to determining the interval of the zero setting threshold corresponding to each impulse interference Signal-to-interference ratio, and the finally obtained data is shown in table 1, and each test modulation Signal (i.e., Signal) corresponds to an interval of the zero setting threshold under the influence of different impulse interference Signal-to-interference ratios (i.e., SINRs).
After obtaining the interval of the zero threshold value of each test modulation signal under the influence of different impulse interference signal-to-interference ratios, the size of the interval corresponding to each impulse interference signal-to-interference ratio can be clearly seen, wherein the number of the corresponding zero threshold values with smaller intervals is less, and the second preset value is obtained to be equivalent to the impulse interference signal-to-interference ratio corresponding to the interval of the minimum zero threshold value, for example, for the test modulation signal PX (1), the second preset value is-20 dB and-10 dB, and for the test modulation signal PX (7), the interval of the minimum zero threshold value is 0.5-0.9, that is, the second preset value is-10 dB.
Table 1:
for the test modulated signal PX (1), under the condition that the pulse interference signal-to-interference ratio thereof is the second preset value, if the probability set is {0.1,0.2,0.3,0.4,0.5,0.55}, for each preset probability in the probability set, obtaining a threshold value with threshold value th between 0 and 30, which enables the error rate of the signal received by the second end of the power communication line to be 0, through testing, thereby obtaining a second threshold value set corresponding to each preset probability, for the test modulated signal PX (1), obtaining 6 second threshold value sets, then calculating the number of elements (i.e., zero setting threshold values) in the 6 second threshold value sets, and taking the second threshold value set with the least number of elements as a target threshold value set.
After the target threshold value sets are obtained, threshold value parameters of each target threshold value set can be determined according to a preset algorithm, and for example, the average value of zero threshold values in the target threshold value sets is calculated according to an average value algorithm; and taking the average value of the zero thresholds in the target threshold set as a threshold parameter.
It should be noted that, in order to reduce errors, when calculating the average value of the zeroing thresholds in the target threshold set, the zeroing thresholds in the target threshold set may be preprocessed first, for example, whether a difference between a maximum value in the set and an adjacent zeroing threshold exceeds a preset value or whether a difference between a minimum value and an adjacent zeroing threshold exceeds a preset value is determined, if so, the zeroing threshold is removed, and then the average value of the zeroing thresholds in the target threshold set is calculated.
After the above processing, the threshold parameter of the test modulated signal PX (1) may be obtained, and for the test modulated signals PX (2) to PX (13), the threshold parameter may be obtained by using the same method, and the power of each test modulated signal and the threshold parameter are used as a data pair (i.e., a set of data), so as to perform linear fitting on the signal power of each test modulated signal and the threshold parameter of each target threshold set, so as to determine the linear relationship for representing the preset model, which may specifically be implemented in the following manner: taking the arithmetic square root of the signal power of each test modulation signal and the threshold parameter of each test modulation signal as a set of data; and performing least square normal linear fitting on the multiple groups of data obtained by the multiple pairs of data to obtain a linear relation.
Optionally, under the condition that the occurrence probability and the signal-to-interference ratio of the impulse interference are determined, the corresponding zero threshold is in a certain interval, since the impulse interference signal-to-interference ratio of the second threshold set is always a fixed value, the obtained second threshold set is equivalent to the interval of the zero threshold corresponding to each occurrence probability of the impulse interference, and the finally obtained data is shown in table 2, and each test modulation signal corresponds to an interval of the zero threshold under the influence of different occurrence probabilities of the impulse interference.
Table 2:
after obtaining the interval of the zero threshold value of each test modulation Signal under the influence of different pulse interference occurrence probabilities P, the size of the interval corresponding to each pulse interference occurrence probability can be clearly seen, the target threshold value set is the second threshold value set with the smallest interval, the middle value of each interval is equivalent to the average value of the zero threshold value, that is, the threshold value parameter, for example, for the test modulation Signal PX (1), the second threshold value set with the probability of 0.3 or 0.4 is the target threshold value set, the threshold value parameter is 0.1, for the test modulation Signal PX (7), the second threshold value set with the probability of 0.4 is the target threshold value set, and the threshold value parameter is 0.7. It should be noted that "nul" in table 2 indicates that there is no corresponding second threshold value set at this probability, and this portion needs to be ignored in determining the target threshold value set.
After the calculation, 13 groups of data are obtained for 13 test modulation signals
th(i))，
I.e. the arithmetic square root of the signal power of the test modulated signal, th (i), i.e. the corresponding threshold parameter, for these 13 sets of data, a least squares linear fit can be used to obtain the corresponding linear relationship. The formula obtained by fitting the data is
px is the signal power and T is the threshold.
In the above embodiment, a plurality of groups of signals with different powers are input, and all threshold sets satisfying that the system bit error rate is zero under different pulse interference occurrence probabilities and different pulse interference signal-to-interference ratios of each group of signals are counted to form corresponding data pairs; and finally, determining an optimal relation between the signal power and the threshold value according to the data pairs, and aiming at the broadband power line communication system, the threshold value optimization method can obtain a corresponding optimal threshold value only by knowing the signal power, and the optimized threshold value can be suitable for pulse interference under different occurrence probabilities and different signal-to-interference ratios in the broadband power line communication environment so as to enable the system to work in an optimal state.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiment of the invention also provides a device for acquiring the zero setting threshold value in the broadband power line communication. It should be noted that the apparatus for acquiring a null threshold in broadband power line communication according to the embodiment of the present invention may be used to execute the method for acquiring a null threshold in broadband power line communication according to the embodiment of the present invention.
Fig. 2 is a schematic diagram of an apparatus for acquiring a zero threshold in broadband power line communication according to an embodiment of the present invention. As shown in fig. 2, the apparatus may include: a detection unit 10, an acquisition unit 20 and a determination unit 30.
The detection unit 10 is configured to detect a first signal power of a target modulation signal loaded to the power communication line.
The obtaining unit 20 is configured to obtain a preset model for describing an association relationship between the signal power and the zero setting threshold.
The determining unit 30 is configured to determine a zero threshold of the target modulation signal based on the preset model and the first signal power.
Through the embodiment, when the zero setting threshold value of the system needs to be adjusted, the detection unit detects the first signal power of the target modulation signal loaded to the electric power communication line, the acquisition unit acquires the preset model for describing the incidence relation between the signal power and the zero setting threshold value, and the determination unit determines the zero setting threshold value of the target modulation signal based on the preset model and the first signal power, so that the technical problem that the optimal zero setting threshold value in broadband electric power communication cannot be accurately determined in the related technology is solved, and the technical effect of accurately acquiring the optimal zero setting threshold value in the broadband electric power communication is achieved.
In the above embodiment, the obtaining unit may include: the loading module is used for loading a plurality of test modulation signals to the first end of the power communication line respectively, wherein the signal power of any two of the test modulation signals is different; the acquisition module is used for acquiring a target threshold set corresponding to each test modulation signal, wherein each target threshold set comprises a plurality of zero setting thresholds which enable the error rate of the signal received by the second end of the power communication line to be zero; the determining module is used for determining the threshold parameters of each target threshold set according to a preset algorithm; and the processing module is used for performing linear fitting on the signal power of each test modulation signal and the threshold parameter of each target threshold set so as to determine a linear relation for representing the preset model.
Specifically, the obtaining module may include: the first obtaining submodule is used for obtaining a second preset value in a preset signal-to-interference ratio set under the condition that the occurrence probability of pulse interference of the electric power communication line is a first preset value, wherein the preset signal-to-interference ratio set comprises a plurality of preset values of the pulse interference signal-to-interference ratio, a first threshold value set corresponds to each preset value of the pulse interference signal-to-interference ratio, the first threshold value set comprises a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference signal-to-interference ratio is the corresponding preset value, and the number of the zero setting threshold values in the first threshold value set corresponding to the second preset value is not more than the number of zero setting threshold values in the first threshold value set corresponding to any preset value in the preset signal-to-; the second obtaining submodule is used for obtaining a plurality of second valve value sets corresponding to the probability set under the condition that the pulse interference signal-to-interference ratio of the electric power communication line is a second preset value, wherein the probability set comprises preset probabilities of a plurality of pulse interference occurrence probabilities, each preset probability corresponds to one second valve value set, and the second valve value sets comprise a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference occurrence probabilities are the corresponding preset probabilities; and the first processing submodule is used for taking the minimum number of zero thresholds in the plurality of second threshold value sets as a target threshold value set.
Optionally, the determining module may include: the determining submodule is used for determining the threshold parameters of each target threshold set according to a preset algorithm, and comprises the following steps: the calculating submodule is used for calculating the average value of the zero threshold values in the target threshold value set according to an average value algorithm; and the second processing sub-module is used for taking the average value of the zero thresholds in the target threshold set as a threshold parameter.
Optionally, the processing module may include: a third processing submodule for taking the arithmetic square root of the signal power of each test modulated signal and the threshold parameter of each test modulated signal as a set of data; and the fourth processing submodule is used for performing least square normal fitting on multiple groups of data obtained by multiple pairs of data pairs to obtain a linear relation.
In the above embodiment, a plurality of groups of signals with different powers are input, and all threshold sets satisfying that the system bit error rate is zero under different pulse interference occurrence probabilities and different pulse interference signal-to-interference ratios of each group of signals are counted to form corresponding data pairs; and finally, determining an optimal relation between the signal power and the threshold value according to the data pairs, and aiming at the broadband power line communication system, the threshold value optimization method can obtain a corresponding optimal threshold value only by knowing the signal power, and the optimized threshold value can be suitable for pulse interference under different occurrence probabilities and different signal-to-interference ratios in the broadband power line communication environment so as to enable the system to work in an optimal state.
Each module provided in this embodiment is the same as the use method provided in the corresponding step of the method embodiment, and the application scenario may also be the same. Of course, it should be noted that the solution related to the modules may not be limited to the content and the scenario in the above embodiments, and the modules may be executed in a computer terminal or a mobile terminal, and may be implemented by software or hardware.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method for acquiring a zero threshold in broadband power line communication is characterized by comprising the following steps:
detecting a first signal power of a target modulation signal loaded to the power communication line;
acquiring a preset model for describing an incidence relation between signal power and a zero setting threshold value;
determining a zero threshold value of the target modulation signal based on the preset model and the first signal power;
the method for obtaining the preset model for describing the incidence relation between the signal power and the zero setting threshold value comprises the following steps:
loading a plurality of test modulation signals to a first end of the power communication line, respectively, wherein signal powers of any two of the plurality of test modulation signals are different;
acquiring a target threshold set corresponding to each test modulation signal, wherein each target threshold set comprises a plurality of zero setting thresholds which enable the error rate of the signal received by the second end of the power communication line to be zero;
determining threshold parameters of each target threshold set according to a preset algorithm;
and performing linear fitting on the signal power of each test modulation signal and the threshold parameter of each target threshold set to determine a linear relation for representing the preset model.
2. The method of claim 1, wherein obtaining the set of target thresholds for each of the test modulated signals comprises:
acquiring a second preset value in a preset signal-to-interference ratio set under the condition that the occurrence probability of the pulse interference of the electric power communication line is a first preset value, wherein the preset signal-to-interference ratio set comprises a plurality of preset values of the pulse interference signal-to-interference ratio, each preset value of the pulse interference signal-to-interference ratio corresponds to a first threshold value set, the first threshold value set comprises a plurality of zero setting threshold values which enable the error rate of a signal received by the second end of the electric power communication line to be zero when the pulse interference signal-to-interference ratio is the corresponding preset value, and the number of the zero setting threshold values in the first threshold value set corresponding to the second preset value is not more than the number of the zero setting threshold values in the first threshold value set corresponding to any preset value in the preset signal-to-interference ratio set;
under the condition that the pulse interference signal-to-interference ratio of the power communication line is the second preset value, acquiring a plurality of second threshold value sets corresponding to a probability set, wherein the probability set comprises a plurality of preset probabilities of the occurrence probability of the pulse interference, each preset probability corresponds to one second threshold value set, and the second threshold value sets comprise a plurality of zero setting threshold values which enable the error rate of the signal received by the second end of the power communication line to be zero when the occurrence probability of the pulse interference is the corresponding preset probability;
and taking the minimum number of zero thresholds in the plurality of second threshold value sets as the target threshold value set.
3. The method of claim 1 or 2, wherein determining the threshold parameters for each of the target threshold sets according to a predetermined algorithm comprises:
calculating the average value of the set zero threshold values in the target threshold value set according to an average value algorithm;
and taking the average value of the zero thresholds in the target threshold set as the threshold parameter.
4. The method of claim 3, wherein linearly fitting the signal power of each of the test modulated signals to the threshold parameters of each of the target threshold sets to determine a linear relationship representing the predetermined model comprises:
using the arithmetic square root of the signal power of each of the test modulated signals and the threshold parameter of each of the test modulated signals as a set of data;
and performing least square normal linear fitting on the obtained multiple groups of data to obtain the linear relation.
5. An apparatus for obtaining a zero threshold in broadband power line communication, comprising:
a detection unit for detecting a first signal power of a target modulation signal loaded to the power communication line;
the acquisition unit is used for acquiring a preset model for describing the incidence relation between the signal power and the zero setting threshold value;
a determining unit, configured to determine a zero setting threshold of the target modulation signal based on the preset model and the first signal power;
wherein the acquisition unit includes:
a loading module, configured to load a plurality of test modulation signals to a first end of the power communication line, respectively, where signal powers of any two of the plurality of test modulation signals are different;
an obtaining module, configured to obtain a target threshold set corresponding to each test modulation signal, where each target threshold set includes a plurality of zeroing thresholds that enable an error rate of a signal received at the second end of the power communication line to be zero;
the determining module is used for determining the threshold parameter of each target threshold set according to a preset algorithm;
and the processing module is used for performing linear fitting on the signal power of each test modulation signal and the threshold parameter of each target threshold set so as to determine a linear relation for representing the preset model.
6. The apparatus of claim 5, wherein the obtaining module comprises:
the first obtaining submodule is used for obtaining a second preset value in a preset signal-to-interference ratio set under the condition that the occurrence probability of pulse interference of the electric power communication line is a first preset value, wherein the preset signal-to-interference ratio set comprises a plurality of preset values of the pulse interference signal-to-interference ratio, each preset value of the pulse interference signal-to-interference ratio corresponds to a first threshold set, the first threshold set comprises a plurality of zero setting threshold values which enable the error rate of signals received by the second end of the electric power communication line to be zero when the pulse interference signal-to-interference ratio is the corresponding preset value, and the number of the zero setting threshold values in the first threshold set corresponding to the second preset value is not more than the number of the zero setting threshold values in the first threshold set corresponding to any preset value in the preset signal-to-interference ratio set;
a second obtaining sub-module, configured to, when an impulse interference signal-to-interference ratio of the power communication line is the second preset value, obtain a plurality of second threshold value sets corresponding to a probability set, where the probability set includes a plurality of preset probabilities of occurrence of impulse interference, each preset probability corresponds to one of the second threshold value sets, and the second threshold value set includes a plurality of zeroing threshold values that enable an error rate of a signal received at the second end of the power communication line to be zero when the probability of occurrence of impulse interference is the corresponding preset probability;
and the first processing submodule is used for taking the minimum number of zero thresholds in the plurality of second threshold value sets as the target threshold value set.
7. The apparatus of claim 5 or 6, wherein the determining module comprises:
the determining submodule is configured to determine, according to a preset algorithm, that the threshold parameter of each target threshold set includes:
the calculating submodule is used for calculating the average value of the zero threshold values in the target threshold value set according to an average value algorithm;
and the second processing submodule is used for taking the average value of zero thresholds in the target threshold set as the threshold parameter.
8. The apparatus of claim 7, wherein the processing module comprises:
a third processing sub-module for taking the arithmetic square root of the signal power of each of said test modulated signals and the threshold parameter of each of said test modulated signals as a set of data;
and the fourth processing submodule is used for performing least square normal linear fitting on the obtained multiple groups of data to obtain the linear relation.
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