Ultrashort wave signal testing method and system

Abstract

The present application relates to the technical field of ultra-short wave signal testing, and specifically to an ultra-short wave signal testing method and system, the method comprising: determining the signal interference degree of each ultra-short wave signal based on the difference between the maximum values ​​of all adjacent throughput differences, combined with the signal deformation degree; determining the time difference coefficient of each ultra-short wave signal based on the number of all suspected disturbed sub-signals in each ultra-short wave signal, and the time interval between any two suspected disturbed sub-signals, and determining the signal quality coefficient of each ultra-short wave signal in combination with the envelope deviation and the signal interference degree, and testing the ultra-short wave signal. The present application improves the accuracy of ultra-short wave signal testing by comprehensively analyzing the influence of external environmental interference and multipath interference on the communication quality of ultra-short wave signals.

Description

Technical Field

[0001] The present application relates to the technical field of ultrashort wave signal testing, and in particular to an ultrashort wave signal testing method and system. Background Art

[0002] Ultrashort waves are usually radio waves with frequencies ranging from 30 MHz to 300 MHz. Due to their strong penetration and high stability, they are widely used in broadcast communications, mobile communications, military communications, aviation communications, etc. However, no matter which field they are used in, there will be certain interference, which will affect the quality of ultrashort wave communications. Therefore, it is usually necessary to test ultrashort wave signals.

[0003] There are many interferences in the transmission process of ultra-short wave signals. When ultra-short wave signals are interfered, their signal strength will be weakened. Since ultra-short wave signals will attenuate during transmission, their signal strength will also weaken as the transmission time and distance increase, affecting the communication quality of ultra-short wave signals. As a result, when testing ultra-short wave signals, it is difficult to distinguish the true situation of ultra-short wave signals, reducing the accuracy of ultra-short wave signal testing. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide an ultrashort wave signal testing method and system, and the technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present application provides an ultrashort wave signal testing method, the method comprising the following steps:

[0006] Collect ultra-short wave signals of different frequencies within a preset time during ultra-short wave communication;

[0007] Extract all envelopes of each ultrashort wave signal, divide the ultrashort wave signal into sub-signals, and determine the signal deformation degree of each ultrashort wave signal based on the difference between each envelope in each ultrashort wave signal and all other envelopes, and the difference in time between each sub-signal and all other sub-signals;

[0008] In each ultra-short wave signal communication process, the throughput at all times within a preset time length is obtained, and based on the difference between the maximum values ​​of all adjacent throughput differences and the signal deformation degree, the signal interference degree of each ultra-short wave signal is determined;

[0009] Determine the envelope deviation of each ultrashort wave signal based on the time intervals between the peak values ​​of all adjacent envelopes in each sub-signal of each ultrashort wave signal and the difference in the average distribution of all envelope peak values ​​between different sub-signals;

[0010] Based on the average distribution of all envelope peaks in each sub-signal, the suspected disturbed sub-signal is obtained in combination with the threshold segmentation algorithm;

[0011] Based on the number of all suspected disturbed sub-signals in each ultrashort wave signal and the time interval between any two suspected disturbed sub-signals, the time difference coefficient of each ultrashort wave signal is determined, and the signal quality coefficient of each ultrashort wave signal is determined in combination with the envelope deviation and the signal disturbance degree, and the ultrashort wave signal is tested.

[0012] Preferably, the method for determining the signal deformation degree of each ultrashort wave signal is:

[0013] Analyze the difference mean between each envelope and all other envelopes in each ultrashort wave signal, and calculate the cumulative sum of the difference means of all envelopes, which is recorded as the first sum value of each ultrashort wave signal;

[0014] Analyze the mean of the difference between the period of each sub-signal and all other sub-signals in each ultrashort wave signal, and calculate the cumulative sum of the mean of the difference in the period of all sub-signals, which is recorded as the second sum of each ultrashort wave signal;

[0015] The signal deformation degree of each ultrashort wave signal is the result of the fusion of the first sum value and the second sum value.

[0016] Preferably, the method for determining the signal disturbance degree of each ultrashort wave signal is:

[0017] In each ultra-short wave signal communication process, based on the distribution of differences in all adjacent throughputs, a signal quality disturbance index of each ultra-short wave signal is determined;

[0018] The expression of the signal interference degree of each ultrashort wave signal is: ; In the formula, represents the signal disturbance degree of the i-th ultrashort wave signal; represents the signal deformation degree of the i-th ultrashort wave signal; Represents the signal quality disturbance coefficient of the i-th ultrashort wave signal.

[0019] Preferably, the signal quality disturbance index of each ultrashort wave signal is the ratio of the range of the absolute values ​​of all elements in the first-order difference sequence of all throughputs of each ultrashort wave signal to the corresponding time interval.

[0020] Preferably, the method for determining the envelope deviation of each ultrashort wave signal is:

[0021] In each ultrashort wave signal, determine the mean of the time intervals between the peak values ​​of all envelopes in each sub-signal and the peak values ​​of their respective right adjacent envelopes, average the differences between the mean values ​​of the time intervals between each sub-signal and all other sub-signals, and calculate the cumulative sum of the mean values ​​of all sub-signals, which is recorded as the first cumulative sum of each ultrashort wave signal;

[0022] In each ultrashort wave signal, the average value of the difference between the mean value of all envelope peak values ​​in each sub-signal and the mean value of all envelope peak values ​​in all other sub-signals is calculated, and the cumulative sum of the average values ​​of the differences in the mean values ​​of the envelope peak values ​​of all sub-signals is calculated, which is recorded as the second cumulative sum of each ultrashort wave signal;

[0023] The envelope deviation of each ultra-short wave signal is a result of the fusion of the first cumulative sum and the second cumulative sum of each ultra-short wave signal.

[0024] Preferably, the method for acquiring the suspected interfered sub-signal is:

[0025] In each ultrashort wave signal, the envelope peak mean of all sub-signals is used as the input of the threshold segmentation algorithm to obtain the segmentation threshold, and the sub-signals with envelope peak mean greater than or equal to the segmentation threshold are regarded as suspected disturbed sub-signals.

[0026] Preferably, the method for determining the time difference coefficient of each ultrashort wave signal is:

[0027] Calculate the time interval between any two suspected disturbed sub-signals in each ultrashort wave signal, and analyze the discreteness of all time intervals;

[0028] The expression of the time difference coefficient of each ultrashort wave signal is: ; In the formula, represents the time difference coefficient of the i-th ultrashort wave signal; Represents the discrete degree of the i-th ultrashort wave signal; Represents the number of all suspected disturbed sub-signals in the i-th ultrashort wave signal.

[0029] Preferably, the expression of the signal quality coefficient of each ultrashort wave signal is: ; In the formula, represents the signal quality coefficient of the i-th ultrashort wave signal; represents the signal disturbance degree of the i-th ultrashort wave signal; Indicates the envelope deviation of the i-th ultrashort wave signal; Represents the time difference coefficient of the i-th ultrashort wave signal.

[0030] Preferably, the testing of the ultrashort wave signal comprises:

[0031] The signal quality coefficients of ultrashort wave signals of all frequencies are used as the input of the threshold segmentation algorithm to obtain the signal segmentation threshold. When the signal quality coefficient is less than or equal to the signal segmentation threshold, the ultrashort wave signal is interfered, otherwise, the ultrashort wave signal is not interfered.

[0032] In a second aspect, an embodiment of the present application further provides an ultrashort wave signal testing system, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the steps of any one of the ultrashort wave signal testing methods described above are implemented.

[0033] This application has at least the following beneficial effects:

[0034] The present application determines the signal deformation degree of each ultra-short wave signal by analyzing the difference between each envelope and all other envelopes in each ultra-short wave signal, and the difference between each sub-signal and all other sub-signals in time, and has the beneficial effect of being able to judge whether the ultra-short wave signal is deformed, and being able to evaluate the signal quality of the ultra-short wave signal after being disturbed by the outside world during the transmission process; the present application determines the signal disturbance degree of each ultra-short wave signal by analyzing the difference between the maximum values ​​of the differences in all adjacent throughputs, combined with the signal deformation degree, and has the beneficial effect of indirectly reflecting the communication quality of the ultra-short wave signal by analyzing the throughput of data during the communication process; the present application determines the signal disturbance degree of each ultra-short wave signal based on the signal quality disturbance index and the signal deformation degree, and has the beneficial effect of comprehensively evaluating the degree of disturbance of the signal quality and more accurately evaluating the signal quality. Communication quality of ultra-short wave signals; This application determines the envelope deviation of each ultra-short wave signal by analyzing the time intervals between the peaks of all adjacent envelopes in each sub-signal in each ultra-short wave signal, and the difference in the average distribution of all envelope peaks between different sub-signals, so as to determine whether there is multipath interference in the ultra-short wave communication process, and its beneficial effect is that it can identify the existence of multipath interference in the communication process; This application determines the time difference coefficient of each ultra-short wave signal by analyzing the number of all suspected disturbed sub-signals in each ultra-short wave signal, and the time interval between any two suspected disturbed sub-signals, and determines the signal quality coefficient of each ultra-short wave signal by combining the envelope deviation and the signal quality coefficient, and tests the ultra-short wave signal, and its beneficial effect is that it can more comprehensively evaluate the quality of the ultra-short wave signal during the transmission process. This application improves the accuracy of ultra-short wave signal testing by comprehensively analyzing the influence of external environmental interference and multipath interference on the communication quality of ultra-short wave signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A flowchart of a method for testing ultrashort wave signals provided in one embodiment of the present application;

[0037] Figure 2 A comparison diagram of ultrashort wave signals with and without external interference provided in one embodiment of the present application;

[0038] Figure 3 A schematic diagram of a signal quality coefficient extraction process provided by an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following is a detailed description of an ultrashort wave signal testing method and system proposed in accordance with the present application, its specific implementation, structure, features and effects, in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0040] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0041] The following is a detailed description of a method and system for testing ultrashort wave signals provided by the present application in conjunction with the accompanying drawings.

[0042] See also Figure 1 , which shows a flow chart of the steps of an ultrashort wave signal testing method provided by an embodiment of the present application, the method comprising the following steps:

[0043] Step S1: collecting ultra-short wave signals at different frequency points within a preset time during ultra-short wave communication.

[0044] Ultrashort wave signals of different frequencies within a preset time period are collected during ultrashort wave communication, and during each ultrashort wave signal communication process, the throughput at all times within the preset time period is obtained, and the sampling interval of the throughput is set to T, wherein the values ​​of the preset time period and the sampling interval are both manually set. In this embodiment, the value of the preset time period is 5s, and the sampling interval T of the throughput is 0.01s. The implementer can set it by himself according to the specific situation, and this embodiment does not impose any special restrictions.

[0045] Step S2: Based on the difference between each envelope in each ultrashort wave signal and all other envelopes, and the difference in time between each sub-signal and all other sub-signals, the signal deformation degree of each ultrashort wave signal is determined.

[0046] When the ultrashort wave is interfered with during communication, the ultrashort wave signal will produce irregular fluctuations in the time domain, which is specifically manifested as a new envelope in the original regularly fluctuating ultrashort wave signal. The original envelope will also be irregularly deformed due to signal interference, and the burrs in the envelope will increase, and the regularity of the overall signal envelope will decrease. Preferably, the ultrashort wave signal comparison diagram with and without external interference provided in this embodiment is as follows: Figure 2 As shown, a represents the ultra-short wave signal diagram without external interference, and b represents the ultra-short wave signal diagram with external interference.

[0047] Therefore, in order to analyze whether the envelope in the ultrashort wave signal is deformed, each ultrashort wave signal is used as the input of the envelope detector to obtain all the envelopes in each ultrashort wave signal; further, in order to analyze the envelope deformation in the local signal of the ultrashort wave signal, each ultrashort wave signal is divided into multiple sub-signals at equal time intervals.

[0048] The principle of extracting the envelope in the signal by the envelope detector is a well-known technology, and the specific process of extracting the envelope in the signal will not be described in detail.

[0049] Furthermore, in order to more accurately understand the degree of external interference to the signal, and thus evaluate the signal quality of the ultrashort wave signal after being interfered with by the outside world during the transmission process, by analyzing the difference between each envelope and all other envelopes in each ultrashort wave signal, and the difference between each sub-signal and all other sub-signals in time, the signal deformation degree of each ultrashort wave signal is determined to determine whether the ultrashort wave signal is deformed, thereby quantifying the quality parameters of the ultrashort wave signal. The specific determination process of the signal deformation degree of each ultrashort wave signal is as follows:

[0050] (1) Analyze the difference mean between each envelope and all other envelopes in each ultrashort wave signal, and calculate the cumulative sum of the difference means of all envelopes, which is recorded as the first sum of each ultrashort wave signal;

[0051] It should be understood that there are many ways to measure the difference between each envelope and the other envelopes. In this embodiment, the difference between different envelopes is measured by calculating the DTW distance between each envelope and all other envelopes. The implementer may also use other methods of measuring the difference, such as Euclidean distance and Manhattan distance. This embodiment does not impose any special restrictions on the selection of the method for measuring the difference between envelopes.

[0052] The calculation process of the DTW distance is a well-known technology, and the specific calculation process will not be repeated here.

[0053] (2) Further, the mean of the difference between the period of each sub-signal and all other sub-signals in each ultrashort wave signal is analyzed, and the cumulative sum of the mean of the difference in period of all sub-signals is calculated, which is recorded as the second sum of each ultrashort wave signal;

[0054] It should be noted that there are many methods for measuring the period difference between each sub-signal and all other sub-signals. In this embodiment, the period difference between each sub-signal and the rest of the sub-signals is measured by calculating the absolute value of the difference between the period of each sub-signal and the period of the rest of the sub-signals. As other implementation methods, the implementer may also use other methods of measuring the difference, such as ratio. Regarding the choice of the method of measuring the difference, this embodiment does not impose any special restrictions.

[0055] In addition, in this embodiment, the reciprocal of the maximum peak value in the spectrum of each sub-signal in the ultrashort wave signal is used as the period of each sub-signal in each ultrashort wave signal. The process of obtaining the signal spectrum is a well-known technology, and the specific process is not repeated here.

[0056] (3) Further, based on the first sum and the second sum, a signal deformation degree of each ultrashort wave signal is determined, and the signal deformation degree of each ultrashort wave signal is a result of fusion of the first sum and the second sum.

[0057] It should be understood that fusion refers to combining two or more indicators by adding or multiplying them together in order to obtain a comprehensive indicator, thereby more comprehensively and accurately evaluating a phenomenon or problem. This fusion method is not limited to simple arithmetic operations, but can also include more complex statistical models and analysis methods. The implementer can choose according to the specific situation, and this embodiment does not impose any special restrictions.

[0058] Preferably, the signal deformation degree of each ultrashort wave signal in the present embodiment is the product of the first sum and the second sum; in actual application, as another implementation method, the signal deformation degree of each ultrashort wave signal is an exponential function value with a natural constant as the base and the addition result of the first sum and the second sum of each ultrashort wave signal as the independent variable.

[0059] According to the signal deformation degree of each ultrashort wave signal, it can be understood that if the ultrashort wave signal is interfered by the outside world during the communication process, some envelopes in the ultrashort wave signal will undergo certain morphological changes, resulting in an increase in the difference between different envelopes in the ultrashort wave signal, thereby increasing the first sum value, and the burrs in the envelope increase after the interference, and even additional envelopes may appear, which in turn causes the period of each sub-signal to change, thereby causing the difference between the periods of different sub-signals to increase, that is, the second sum value increases, and ultimately the signal deformation degree increases, indicating that the interference to the ultrashort wave signal during the communication transmission process is more serious; conversely, if the ultrashort wave signal is not interfered by the outside world, the difference between different envelopes in the ultrashort wave signal is smaller, thereby making the first sum value smaller, and the difference between the periods of different sub-signals is smaller, that is, the second sum value is smaller, and ultimately the signal deformation degree is smaller.

[0060] Step S3: In each ultra-short wave signal communication process, based on the difference between the maximum values ​​of all adjacent throughput differences and in combination with the signal deformation degree, the signal interference degree of each ultra-short wave signal is determined.

[0061] When the ultra-short wave signal is interfered, its throughput will also decrease due to the interference. Specifically, the throughput decreases faster, the decrease amplitude is larger and the decrease lasts longer.

[0062] Therefore, in order to further evaluate the degree to which the signal quality of the ultra-short wave signal is disturbed by the external environment during the communication process, in each ultra-short wave signal communication process, by analyzing the difference between the maximum values ​​of all adjacent throughput differences, combined with the signal deformation degree, the signal disturbance degree of each ultra-short wave signal is determined to indirectly reflect the communication quality of the ultra-short wave signal, specifically:

[0063] The signal quality disturbance index of each ultra-short wave signal is the ratio of the absolute value range of all elements in the first-order difference sequence of all throughputs of each ultra-short wave signal to the corresponding time interval.

[0064] The method for obtaining the first-order difference sequence is a well-known technology, and the specific process of obtaining the first-order difference sequence of throughput is not described in detail.

[0065] According to the signal quality disturbance index of each ultra-short wave signal, it can be understood that when the ultra-short wave signal is interfered with, the throughput in the communication process will drop sharply in a short time, and then the larger the range in the first-order difference sequence of the throughput and the smaller the time interval corresponding to the range, the larger the signal quality disturbance index of the ultra-short wave signal, indicating that the more serious the interference to the ultra-short wave signal in the communication process, the worse the quality of the ultra-short wave signal; conversely, when the ultra-short wave signal is not interfered with, the smaller the range in the first-order difference sequence of the throughput and the larger the time interval corresponding to the range, the smaller the signal quality disturbance index of the ultra-short wave signal.

[0066] Further, in order to comprehensively evaluate the degree of interference of the signal quality, thereby more accurately evaluating the communication quality of the ultra-short wave signal, the signal interference degree of each ultra-short wave signal is determined based on the signal quality interference index and the signal deformation degree, specifically:

[0067] The expression of the signal interference degree of each ultrashort wave signal is: ; In the formula, represents the signal disturbance degree of the i-th ultrashort wave signal; represents the signal deformation degree of the i-th ultrashort wave signal; Represents the signal quality disturbance coefficient of the i-th ultrashort wave signal.

[0068] According to the signal interference degree of each ultrashort wave signal, it can be understood that when the ultrashort wave signal is more seriously interfered with, that is, the greater the signal interference degree of the ultrashort wave signal, the greater the signal envelope deformation degree of the ultrashort wave signal in the time domain, and the more serious the interference to the communication quality of the ultrashort wave signal, that is, the greater the signal quality interference index; conversely, when the ultrashort wave signal is less interfered with, that is, the smaller the signal interference degree of the ultrashort wave signal, the smaller the signal envelope deformation degree of the ultrashort wave signal in the time domain, and the less interference to the communication quality of the ultrashort wave signal, that is, the smaller the signal quality interference index.

[0069] Step S4: Determine the envelope deviation of each ultrashort wave signal based on the time intervals between all adjacent envelope peaks in each sub-signal in each ultrashort wave signal and the difference in average distribution of all envelope peaks between different sub-signals.

[0070] In the process of ultra-short wave signal transmission, the ultra-short wave signal is sent from the transmitter. In the process of transmission to the receiver, in addition to direct interference, it may also be due to the reflection of the radio waves by the ground and ground objects during the transmission process, resulting in multiple reflection paths (side paths) in addition to the direct wave (main path). The main path and the side path have different path periods, and the time delay and phase when they arrive at the receiver are different, which will cause the superposition of multipath signals at the receiver end, thereby causing the deformation of the ultra-short wave signal. However, because the side path is transmitted to the receiver after multiple reflections, the signal attenuation is greater, and the signal envelope is more similar to the main path signal. Therefore, when the above method is used for calculation after superposition, the signal interference is small, and it is difficult to determine whether there is multipath interference in the ultra-short wave signal, so further analysis is needed.

[0071] Specifically, when there is multipath interference in the ultra-short wave signal, since the reasons for the formation of each reflection path are different (the obstacles encountered are different), when it arrives at the receiver and is superimposed with the main path signal, the envelope of the superimposed signal will be offset, which will cause the sampling time interval between the partial envelopes to become longer and a small increase in the signal level will occur.

[0072] Therefore, in order to identify the existence of multipath interference, the envelope deviation of each ultrashort wave signal is determined by analyzing the time intervals between the peaks of all adjacent envelopes in each sub-signal in each ultrashort wave signal, as well as the difference in the average distribution of all envelope peaks between different sub-signals, so as to determine whether there is multipath interference in the ultrashort wave communication process. Specifically,

[0073] (1) In each ultrashort wave signal, determine the mean of the time intervals between the peak values ​​of all envelopes in each sub-signal and the peak values ​​of their respective right adjacent envelopes, average the differences between the mean values ​​of the time intervals between each sub-signal and all other sub-signals, and calculate the cumulative sum of the mean values ​​of all sub-signals, which is recorded as the first cumulative sum of each ultrashort wave signal;

[0074] (2) Further, in each ultrashort wave signal, the average value of the difference between the mean value of all envelope peak values ​​in each sub-signal and the mean value of all envelope peak values ​​in all other sub-signals is calculated, and the cumulative sum of the average values ​​of the differences in the mean values ​​of the envelope peak values ​​of all sub-signals is calculated, which is recorded as the second cumulative sum of each ultrashort wave signal;

[0075] (3) Further, based on the first accumulated sum and the second accumulated sum, the envelope deviation of each ultrashort wave signal is determined, and the envelope deviation of each ultrashort wave signal is a result of merging the first accumulated sum and the second accumulated sum of each ultrashort wave signal.

[0076] Preferably, in the present embodiment, the envelope deviation of each ultrashort wave signal is the product of the first cumulative sum and the second cumulative sum of each ultrashort wave signal; in actual application, the envelope deviation of each ultrashort wave signal is an exponential function value with a natural constant as the base and the sum of the first cumulative sum and the second cumulative sum of each ultrashort wave signal as the independent variable.

[0077] Further, according to the envelope deviation of each ultrashort wave signal, it can be understood that when there is multipath interference in the propagation process of the ultrashort wave signal, the envelope of the ultrashort wave signal will be offset due to the multipath interference. Therefore, the greater the difference in the mean values ​​of the time intervals between different sub-signals in the interfered ultrashort wave signal, the larger the first cumulative sum of the ultrashort wave signal, and the greater the difference between the mean values ​​of all envelope peaks in each sub-signal and the mean values ​​of all envelope peaks in all other sub-signals due to the superposition of signals, the larger the second cumulative sum of the ultrashort wave signal, and ultimately the larger the envelope deviation of the ultrashort wave signal; conversely, when there is no multipath interference in the propagation process of the ultrashort wave signal, the smaller the difference in the mean values ​​of the time intervals between different sub-signals in the ultrashort wave signal, the smaller the first cumulative sum of the ultrashort wave signal, and the smaller the difference between the mean values ​​of all envelope peaks in each sub-signal and the mean values ​​of all envelope peaks in all other sub-signals due to the superposition of signals, the smaller the second cumulative sum of the ultrashort wave signal, and ultimately the smaller the envelope deviation of the ultrashort wave signal.

[0078] Step S5: Based on the average distribution of all envelope peaks in each sub-signal, a suspected disturbed sub-signal is obtained in combination with a threshold segmentation algorithm; based on the number of all suspected disturbed sub-signals in each ultrashort wave signal and the time interval between any two suspected disturbed sub-signals, the time difference coefficient of each ultrashort wave signal is determined, and the signal quality coefficient of each ultrashort wave signal is determined in combination with the envelope deviation and the signal quality coefficient.

[0079] Because each path of multipath interference encounters different obstacles, the time of arrival at the receiver is different, and the interference is more dispersed. The time intervals between the affected sub-signals are relatively large and less regular. When multipath interference exists, the superposition of ultra-short wave signals will cause small changes in the level.

[0080] In order to determine the dispersion situation when multipath interference exists, the envelope peak mean of all sub-signals in each ultra-short wave signal is used as the input of the threshold segmentation algorithm to obtain the segmentation threshold, and the sub-signals with envelope peak mean greater than or equal to the segmentation threshold are regarded as suspected interfered sub-signals.

[0081] It should be noted that there are many commonly used threshold segmentation algorithms. In this embodiment, the Otsu threshold segmentation algorithm is used to obtain the segmentation threshold in the envelope peak mean of all sub-signals. The implementer can also use other threshold segmentation algorithms such as the maximum inter-class variance to classify the sub-signals.

[0082] Among them, the Otsu threshold segmentation algorithm is a well-known technology, and the specific segmentation principle will not be repeated here.

[0083] Furthermore, in order to quantify the impact of multipath interference on the signal quality during the ultra-short wave signal communication process, the time difference coefficient of each ultra-short wave signal is determined based on the number of all suspected interfered sub-signals in each ultra-short wave signal and the time interval between any two suspected interfered sub-signals to evaluate the stability of the ultra-short wave signal, specifically:

[0084] Calculate the time interval between any two suspected disturbed sub-signals in each ultrashort wave signal, and analyze the discreteness of all time intervals;

[0085] It should be noted that there are many methods for measuring the degree of discreteness of all time intervals in an ultrashort wave signal. In this embodiment, the degree of discreteness of all time intervals is measured by calculating the variance of all time intervals. The implementer may also use other methods for measuring the degree of discreteness, such as the coefficient of discreteness or the mean difference. This embodiment does not impose any special restrictions on the selection of the method for measuring the degree of discreteness.

[0086] The expression of the time difference coefficient of each ultrashort wave signal is: ; In the formula, represents the time difference coefficient of the i-th ultrashort wave signal; Represents the discrete degree of the i-th ultrashort wave signal; Represents the number of all suspected disturbed sub-signals in the i-th ultrashort wave signal.

[0087] According to the time difference coefficient of each ultrashort wave signal, it can be understood that if multipath interference exists during the transmission of ultrashort wave signals, the sub-signals in some time periods will have serious multipath interference. Therefore, the greater the degree of discreteness of the time intervals between the suspected interfered sub-signals, the greater the time difference coefficient of the ultrashort wave signal, indicating that there are more time periods in the ultrashort wave signal that are interfered with by multipath; conversely, the smaller the degree of discreteness of the time intervals between the suspected interfered sub-signals, the smaller the time difference coefficient of the ultrashort wave signal, indicating that there are fewer time periods in the ultrashort wave signal that are interfered with.

[0088] Further, in order to more comprehensively evaluate the quality of the ultrashort wave signal during the transmission process, the signal quality coefficient of each ultrashort wave signal is determined based on the envelope deviation, the time difference coefficient and the signal interference degree, specifically:

[0089] The expression of the signal quality coefficient of each ultrashort wave signal is: ; In the formula, In the formula, represents the signal quality coefficient of the i-th ultrashort wave signal; represents the signal disturbance degree of the i-th ultrashort wave signal; Indicates the envelope deviation of the i-th ultrashort wave signal; Represents the time difference coefficient of the i-th ultrashort wave signal.

[0090] According to the signal quality coefficient of each ultrashort wave signal, it can be understood that when the ultrashort wave signal is affected by the outside world and there is multipath interference during the transmission process, the greater the envelope deviation of the ultrashort wave signal, and the greater and more dispersed the time difference of the interference, that is, the larger the time difference coefficient, and the greater the signal interference degree of the ultrashort wave signal, the smaller the signal quality coefficient of the ultrashort wave signal, indicating that the ultrashort wave signal is seriously disturbed by external interference and multipath interference during transmission, and its transmission quality is worse; conversely, if the envelope deviation of the ultrashort wave signal is smaller, and the time difference of the interference is smaller and the distribution is more concentrated, that is, the smaller the time difference coefficient, and the smaller the signal interference degree of the ultrashort wave signal, then the signal quality coefficient of the ultrashort wave signal is larger, indicating that the transmission quality of the ultrashort wave signal is better during transmission, and it is more likely to be uninterrupted.

[0091] Preferably, the signal quality coefficient extraction process diagram provided in this embodiment is as follows: Figure 3 shown.

[0092] Step S6: Based on the signal quality coefficient of each ultrashort wave signal, the ultrashort wave signal is tested.

[0093] The signal quality coefficient of the ultrashort wave signal of all rates is used as the input of the threshold segmentation algorithm to obtain the signal segmentation threshold. When the signal quality coefficient is less than or equal to the signal segmentation threshold, the ultrashort wave signal is interfered with and automatically switches to the ultrashort wave signal frequency point greater than the signal segmentation threshold to transmit the ultrashort wave signal; otherwise, the ultrashort wave signal is not interfered with. In this embodiment, the Otsu threshold segmentation algorithm is used to obtain the signal segmentation threshold to realize the detection of signal quality. The selection of the threshold segmentation algorithm is not particularly limited in this embodiment.

[0094] So far, this embodiment analyzes the direct interference and multipath interference during the ultra-short wave signal transmission process, constructs the signal interference degree and the multipath interference coefficient to characterize the interference situation when the ultra-short wave signal is currently used for transmission, and further constructs the signal quality coefficient to characterize the signal quality of the current ultra-short wave signal transmission. It solves the problem that it is difficult to distinguish signal attenuation and interference when testing the ultra-short wave signal when the ultra-short wave signal is currently used for transmission, improves the accuracy of the ultra-short wave signal test, and can more timely discover the signal quality problems existing in the ultra-short wave signal transmission process.

[0095] Based on the same inventive concept as the above method, an embodiment of the present application also provides an ultrashort wave signal testing system, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the steps of any one of the above ultrashort wave signal testing methods are implemented.

[0096] It should be noted that the above sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above is a description of a specific embodiment of this specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0097] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0098] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for testing ultrashort wave signals, characterized in that: The method comprises the following steps: Collect ultra-short wave signals of different frequencies within a preset time during ultra-short wave communication; Extract all envelopes of each ultrashort wave signal, divide the ultrashort wave signal into sub-signals, and determine the signal deformation degree of each ultrashort wave signal based on the difference between each envelope in each ultrashort wave signal and all other envelopes, and the difference in time between each sub-signal and all other sub-signals; In each ultra-short wave signal communication process, the throughput at all times within a preset time length is obtained, and based on the difference between the maximum values ​​of all adjacent throughput differences and the signal deformation degree, the signal interference degree of each ultra-short wave signal is determined; Determine the envelope deviation of each ultrashort wave signal based on the time intervals between the peak values ​​of all adjacent envelopes in each sub-signal of each ultrashort wave signal and the difference in the average distribution of all envelope peak values ​​between different sub-signals; Based on the average distribution of all envelope peaks in each sub-signal, the suspected disturbed sub-signal is obtained in combination with the threshold segmentation algorithm; Based on the number of all suspected disturbed sub-signals in each ultrashort wave signal and the time interval between any two suspected disturbed sub-signals, the time difference coefficient of each ultrashort wave signal is determined, and the signal quality coefficient of each ultrashort wave signal is determined in combination with the envelope deviation and the signal disturbance degree, and the ultrashort wave signal is tested.

2. The ultrashort wave signal testing method according to claim 1, characterized in that: The method for determining the signal deformation degree of each ultrashort wave signal is as follows: Analyze the difference mean between each envelope and all other envelopes in each ultrashort wave signal, and calculate the cumulative sum of the difference means of all envelopes, which is recorded as the first sum value of each ultrashort wave signal; Analyze the mean of the difference between the period of each sub-signal and all other sub-signals in each ultrashort wave signal, and calculate the cumulative sum of the mean of the difference in the period of all sub-signals, which is recorded as the second sum of each ultrashort wave signal; The signal deformation degree of each ultrashort wave signal is the result of the fusion of the first sum value and the second sum value.

3. The ultrashort wave signal testing method according to claim 1, characterized in that: The method for determining the signal interference degree of each ultrashort wave signal is as follows: In each ultra-short wave signal communication process, based on the distribution of differences in all adjacent throughputs, a signal quality disturbance index of each ultra-short wave signal is determined; The expression of the signal interference degree of each ultrashort wave signal is: ; In the formula, represents the signal disturbance degree of the i-th ultrashort wave signal; represents the signal deformation degree of the i-th ultrashort wave signal; Represents the signal quality disturbance coefficient of the i-th ultrashort wave signal.

4. The ultrashort wave signal testing method according to claim 3, characterized in that: The signal quality disturbance index of each ultra-short wave signal is the ratio of the range of the absolute values ​​of all elements in the first-order difference sequence of all throughputs of each ultra-short wave signal to the corresponding time interval.

5. The ultrashort wave signal testing method according to claim 1, characterized in that: The method for determining the envelope deviation of each ultrashort wave signal is as follows: In each ultrashort wave signal, determine the mean of the time intervals between the peak values ​​of all envelopes in each sub-signal and the peak values ​​of their respective right adjacent envelopes, average the differences between the mean values ​​of the time intervals between each sub-signal and all other sub-signals, and calculate the cumulative sum of the mean values ​​of all sub-signals, which is recorded as the first cumulative sum of each ultrashort wave signal; In each ultrashort wave signal, the average value of the difference between the mean value of all envelope peak values ​​in each sub-signal and the mean value of all envelope peak values ​​in all other sub-signals is calculated, and the cumulative sum of the average values ​​of the differences in the mean values ​​of the envelope peak values ​​of all sub-signals is calculated, which is recorded as the second cumulative sum of each ultrashort wave signal; The envelope deviation of each ultra-short wave signal is a result of the fusion of the first cumulative sum and the second cumulative sum of each ultra-short wave signal.

6. The ultrashort wave signal testing method according to claim 1, characterized in that: The method for obtaining the suspected interfered sub-signal is: In each ultrashort wave signal, the envelope peak mean of all sub-signals is used as the input of the threshold segmentation algorithm to obtain the segmentation threshold, and the sub-signals with envelope peak mean greater than or equal to the segmentation threshold are regarded as suspected disturbed sub-signals.

7. The ultrashort wave signal testing method according to claim 1, characterized in that: The method for determining the time difference coefficient of each ultrashort wave signal is: Calculate the time interval between any two suspected disturbed sub-signals in each ultrashort wave signal, and analyze the discreteness of all time intervals; The expression of the time difference coefficient of each ultrashort wave signal is: ; In the formula, represents the time difference coefficient of the i-th ultrashort wave signal; Represents the discrete degree of the i-th ultrashort wave signal; Represents the number of all suspected disturbed sub-signals in the i-th ultrashort wave signal.

8. The ultrashort wave signal testing method according to claim 1, characterized in that: The expression of the signal quality coefficient of each ultrashort wave signal is: ; In the formula, represents the signal quality coefficient of the i-th ultrashort wave signal; represents the signal disturbance degree of the i-th ultrashort wave signal; Indicates the envelope deviation of the i-th ultrashort wave signal; Represents the time difference coefficient of the i-th ultrashort wave signal.

9. The ultrashort wave signal testing method according to claim 1, characterized in that: The testing of the ultrashort wave signal comprises: The signal quality coefficients of ultrashort wave signals of all frequencies are used as the input of the threshold segmentation algorithm to obtain the signal segmentation threshold. When the signal quality coefficient is less than or equal to the signal segmentation threshold, the ultrashort wave signal is interfered, otherwise, the ultrashort wave signal is not interfered.

10. An ultrashort wave signal testing system, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the ultrashort wave signal testing method as described in any one of claims 1 to 9 are implemented.

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