CN113358929B - Method for adjusting reference level, computer readable storage medium and spectrum receiver - Google Patents
Method for adjusting reference level, computer readable storage medium and spectrum receiver Download PDFInfo
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- CN113358929B CN113358929B CN202110720327.6A CN202110720327A CN113358929B CN 113358929 B CN113358929 B CN 113358929B CN 202110720327 A CN202110720327 A CN 202110720327A CN 113358929 B CN113358929 B CN 113358929B
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- G01R23/16—Spectrum analysis; Fourier analysis
Abstract
The application is applicable to the field of radio and provides a method for adjusting a reference level, a computer-readable storage medium and a spectrum receiver. In the method for adjusting the reference level, in a signal sampling frame, the reference level automatically increases the peak signal reference level along with the enhancement of a signal, and automatically decreases the peak signal reference level along with the reduction of the signal; therefore, whether a large signal, a small signal or a signal is superposed on another signal can be identified, the identification rate of spectrum signal detection in a complex electromagnetic environment is improved, the full-automatic intellectualization of the spectrum receiver is realized, any manual operation is not needed, and the popularization of equipment is facilitated.
Description
Technical Field
The present application relates to the field of radio, and in particular, to a method for adjusting a reference level, a computer-readable storage medium, and a spectrum receiver.
Background
The reference level is very important for identifying the signal, and the adjustment of the reference level is mainly performed by manual adjustment and automatic adjustment of instruments at present. The automatic adjustment of the instrument is to determine the gain according to the maximum or minimum signal in the scanning frequency range, determine the reference level in the whole scanning frequency range by adding a certain value to the low noise level in the whole signal frame, and the reference level is fixed and unchangeable in the whole signal frame, so the reference levels used for identifying signals in the whole frequency range scanning frame are the same, but the signals have different sizes, and some signals are superposed on other signals, so the automatic adjustment of the instrument cannot identify the signals in the complex electromagnetic environment.
Disclosure of Invention
The application aims to provide a method for adjusting a reference level, a computer readable storage medium and a frequency spectrum receiver, and aims to solve the problem that signals in a complex electromagnetic environment cannot be identified by adopting a mode of automatically adjusting the reference level by an instrument in the prior art.
In a first aspect, the present application provides a method for adjusting a reference level, the method comprising:
s101, receiving a signal, and sampling the signal;
s102, obtaining average level values of a preset number of sampling points, determining a first trough signal average level according to the average level values, and using the sum of the first trough signal average level and a preset fixed value as a first peak signal reference level for identifying a first peak signal;
s103, identifying a first peak signal according to the reference level of the first peak signal, calculating the average level value of the first peak signal, and then executing S104;
s104, judging whether the difference between the average level value of the first peak signal and the reference level of the first peak signal is larger than a preset level difference, if so, taking the sum of the reference level of the first peak signal and the preset level difference as the updated reference level of the first peak signal, and then returning to S103, otherwise, executing S105;
s105, judging whether a signal higher than the reference level of the current peak signal exists in a third preset bandwidth after the current peak signal is ended according to the reference level of the current peak signal, if so, executing S106, and if not, executing S107;
s106, taking the sum of the average level value of the signal in the third preset bandwidth in the previous step and a preset fixed value as the reference level of the next peak signal, and then executing S108;
s107, taking the sum of the average level value of the signal in the third preset bandwidth in the previous step and a preset fixed value as a new peak signal reference level, judging whether a signal higher than the new peak signal reference level exists in the third preset bandwidth or not according to the new peak signal reference level, if so, executing S106, and if not, continuing to execute S107;
s108, identifying the next peak signal according to the reference level of the next peak signal, calculating the average level value of the next peak signal, and then executing S109;
s109, judging whether the difference between the average level value of the next peak signal and the reference level of the next peak signal is larger than a preset level difference, if so, taking the sum of the reference level of the next peak signal and the preset level difference as the updated reference level of the next peak signal, and then returning to S108, otherwise, returning to S105 until the received signal is identified completely.
In a second aspect, the present application provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of adjusting a reference level as described.
In a third aspect, the present application provides a spectrum receiver, comprising:
one or more processors;
a memory; and
one or more computer programs, the processor and the memory being connected by a bus, wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, which when executing the computer programs implement the steps of the method of adjusting a reference level as described.
In the method for adjusting the reference level, in a signal sampling frame, the reference level of the peak signal is automatically increased along with the enhancement of the signal, and the reference level of the peak signal is automatically reduced along with the reduction of the signal; therefore, whether a large signal, a small signal or a signal is superposed on another signal can be identified, the identification rate of spectrum signal detection in a complex electromagnetic environment is improved, the full-automatic intellectualization of the spectrum receiver is realized, any manual operation is not needed, and the popularization of equipment is facilitated.
Drawings
Fig. 1 is a flowchart of a method for adjusting a reference level according to an embodiment of the present disclosure.
Fig. 2 is a block diagram illustrating a specific structure of a spectrum receiver according to an embodiment of the present application.
Detailed Description
In order to make the purpose, technical solution and beneficial effects of the present application more clear and more obvious, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Please refer to fig. 1, which is a flowchart illustrating a method for adjusting a reference level according to an embodiment of the present application, wherein the method for adjusting a reference level is mainly applied to a spectrum receiver for example, and the method for adjusting a reference level according to an embodiment of the present application includes the following steps:
s101, receiving a signal, and sampling the signal.
For example, the sampling resolution is 100KHz, 200KHz, 25KHz, etc.
S102, obtaining average level values of a preset number of sampling points, determining a first trough signal average level according to the average level values, and using the sum of the first trough signal average level and a preset fixed value as a first peak signal reference level for identifying a first peak signal.
In an embodiment of the present application, the obtaining of the average level value of the preset number of sampling points may specifically be: and acquiring the average level value of the continuous sampling points with the preset number.
In an embodiment of the present application, the preset number of sampling points may be one sampling point or a plurality of consecutive sampling points (e.g., 10-100 sampling points).
In an embodiment of the present application, the preset fixed value is a modified value, so that a peak signal reference level is higher than a highest value of a plurality of valley bottom levels after a peak signal identified by the peak signal reference level, and since the valley bottom level has a zero-crossing phenomenon, the preset fixed value is generally 8-12dbm, which is different for different spectrum receivers.
In an embodiment of the present application, the determining the first valley signal average level according to the average level value, and taking a sum of the first valley signal average level and a preset fixed value as the first peak signal reference level may specifically be:
and taking the average level value as a first valley signal average level, and taking the sum of the first valley signal average level and a preset fixed value as a first peak signal reference level.
The determining the first valley signal average level according to the average level value, and using the sum of the first valley signal average level and a preset fixed value as the first peak signal reference level may also specifically be:
identifying the signal by using the sum of the average level value and a preset fixed value as a reference level, judging whether a peak signal with a first preset bandwidth (the first preset bandwidth can be set according to practice and can indicate that the signal exists) higher than the average level value is identified, and if so, taking the sum of the signal average level value in a second preset bandwidth (for example, 2MHz, which is an empirical value and can be determined according to the fineness of the valley signal average level used for identifying the signal, wherein the narrower the bandwidth, the finer the description) behind the peak signal and the preset fixed value as the first peak signal reference level; if no wave peak signal is identified in the whole signal frame, calculating an average level value in the whole signal frame, taking the average level value in the whole signal frame as a first wave trough signal average level, and taking the sum of the first wave trough signal average level and a preset fixed value as a first wave peak signal reference level, wherein the signal average level value in the second preset bandwidth refers to the sum of level values of all sampling points of the signal in the second preset bandwidth divided by the number of the sampling points.
S103, identifying the first peak signal according to the reference level of the first peak signal, calculating the average level value of the first peak signal, and then executing S104.
S104, judging whether the difference between the average level value of the first peak signal and the reference level of the first peak signal is larger than a preset level difference, if so, taking the sum of the reference level of the first peak signal and the preset level difference as the updated reference level of the first peak signal, and then returning to S103, otherwise, executing S105. I.e. automatically raising the peak signal reference level as the signal increases.
In an embodiment of the present application, the predetermined level difference may be set to any value between 4dB and 12dB, such as 4dB, 6dB, 12dB, etc., according to an actual setting, and the magnitude of the predetermined level difference determines the degree of fineness.
S105, determining whether there is a signal higher than the reference level of the current peak signal within a third preset bandwidth (for example, 1MHz, which is an empirical value and can be determined according to the fineness of the average level of the valley signal used for identifying the signal, the narrower the bandwidth indicates the finer the bandwidth is), if so, executing S106, and if not, executing S107.
S106, the sum of the average level value of the signal within the third preset bandwidth in the previous step and the preset fixed value is used as the reference level of the next peak signal, and then S108 is executed.
S107, taking the sum of the average level value of the signal in the third preset bandwidth in the previous step and a preset fixed value as a new peak signal reference level, judging whether a signal higher than the new peak signal reference level exists in the third preset bandwidth or not according to the new peak signal reference level, if so, executing S106, and if not, continuing to execute S107.
The purpose of S107 is to continue to look for lower average levels of the valley signal to lower the peak signal reference level as the signal becomes smaller.
S108, identifying the next peak signal according to the reference level of the next peak signal, and calculating the average level value of the next peak signal, and then performing S109.
S109, judging whether the difference between the average level value of the next peak signal and the reference level of the next peak signal is larger than a preset level difference, if so, taking the sum of the reference level of the next peak signal and the preset level difference as the updated reference level of the next peak signal, and then returning to S108, otherwise, returning to S105 until the received signal is identified completely.
An embodiment of the present application provides a computer-readable storage medium, which stores a computer program, which when executed by a processor implements the steps of the method of adjusting reference levels as provided by an embodiment of the present application.
Fig. 2 shows a specific block diagram of a spectrum receiver according to an embodiment of the present application, where a spectrum receiver 100 includes: one or more processors 101, a memory 102, and one or more computer programs, wherein the processors 101 and the memory 102 are connected by a bus, the one or more computer programs are stored in the memory 102 and configured to be executed by the one or more processors 101, and the steps of the method of adjusting reference levels as provided by an embodiment of the present application are implemented when the computer programs are executed by the processors 101.
In an embodiment of the present application, the spectrum receiver may be a drone detection receiving device or the like.
In the method for adjusting the reference level, in a signal sampling frame, the reference level of the peak signal is automatically increased along with the enhancement of the signal, and the reference level of the peak signal is automatically reduced along with the reduction of the signal; therefore, whether a large signal, a small signal or a signal is superposed on another signal can be identified, the identification rate of spectrum signal detection in a complex electromagnetic environment is improved, the full-automatic intellectualization of the spectrum receiver is realized, any manual operation is not needed, and the popularization of equipment is facilitated.
It should be understood that the steps in the embodiments of the present application are not necessarily performed in the order indicated by the step numbers. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of adjusting a reference level, the method comprising the steps of:
s101, receiving a signal, sampling the signal, and then executing S102;
s102, obtaining average level values of a preset number of sampling points, determining a first trough signal average level according to the average level values, taking the sum of the first trough signal average level and a preset fixed value as a first peak signal reference level for identifying a first peak signal, and then executing S103;
s103, identifying a first peak signal according to the reference level of the first peak signal, calculating the average level value of the first peak signal, and then executing S104;
s104, judging whether the difference between the average level value of the first peak signal and the reference level of the first peak signal is larger than a preset level difference, if so, taking the sum of the reference level of the first peak signal and the preset level difference as the updated reference level of the first peak signal, and then returning to S103, otherwise, executing S105;
s105, judging whether a signal higher than the reference level of the current peak signal exists in a third preset bandwidth after the current peak signal is ended according to the reference level of the current peak signal, if so, executing S106, and if not, executing S107;
s106, taking the sum of the average level value of the signal in the third preset bandwidth in the previous step and a preset fixed value as the reference level of the next peak signal, and then executing S108;
s107, taking the sum of the average level value of the signal in the third preset bandwidth in the previous step and a preset fixed value as a new peak signal reference level, judging whether a signal higher than the new peak signal reference level exists in the third preset bandwidth or not according to the new peak signal reference level, if so, executing S106, and if not, continuing to execute S107;
s108, identifying the next peak signal according to the reference level of the next peak signal, calculating the average level value of the next peak signal, and then executing S109;
s109, judging whether the difference between the average level value of the next peak signal and the reference level of the next peak signal is larger than a preset level difference, if so, taking the sum of the reference level of the next peak signal and the preset level difference as the updated reference level of the next peak signal, and then returning to S108, otherwise, returning to S105 until the received signal is identified completely.
2. The method as claimed in claim 1, wherein said obtaining the average level value of the predetermined number of sampling points is specifically: and acquiring the average level value of the continuous sampling points with the preset number.
3. The method of claim 1, wherein the predetermined number of sample points is one sample point or a consecutive plurality of sample points.
4. The method of claim 1, wherein the predetermined fixed value is a modified value such that a peak signal reference level is higher than a highest value among a plurality of valley bottom levels following a peak signal identified by the peak signal reference level.
5. The method as claimed in claim 1, wherein said determining the first valley signal average level based on said average level value, and using the sum of the first valley signal average level plus a predetermined fixed value as the first peak signal reference level is embodied as:
and taking the average level value as a first valley signal average level, and taking the sum of the first valley signal average level and a preset fixed value as a first peak signal reference level.
6. The method as claimed in claim 1, wherein said determining the first valley signal average level based on said average level value, and using the sum of the first valley signal average level plus a predetermined fixed value as the first peak signal reference level is embodied as:
adopting the sum of the average level value and a preset fixed value as a reference level to identify the signal, judging whether a peak signal with a first preset bandwidth and higher than the average level value is identified, and if so, taking the sum of the average level value of the signal in a second preset bandwidth behind the peak signal and the preset fixed value as a first peak signal reference level; if no wave peak signal is identified in the whole signal frame, calculating an average level value in the whole signal frame, taking the average level value in the whole signal frame as a first wave trough signal average level, and taking the sum of the first wave trough signal average level and a preset fixed value as a first wave peak signal reference level, wherein the signal average level value in the second preset bandwidth refers to the sum of level values of all sampling points of the signal in the second preset bandwidth divided by the number of the sampling points.
7. The method of claim 1, wherein the predetermined fixed value is 8-12 dbm.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of adjusting a reference level according to any one of claims 1 to 7.
9. A spectrum receiver, comprising:
one or more processors;
a memory; and
one or more computer programs, the processor and the memory being connected by a bus, wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, characterized in that the steps of the method of adjusting a reference level according to any of claims 1 to 7 are implemented when the computer programs are executed by the processors.
10. The spectrum receiver of claim 9, wherein said spectrum receiver is an unmanned aircraft detection receiver device.
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