CN113691479B - Method and device for eliminating side lobe influence of signal and readable storage medium - Google Patents
Method and device for eliminating side lobe influence of signal and readable storage medium Download PDFInfo
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- CN113691479B CN113691479B CN202110799921.9A CN202110799921A CN113691479B CN 113691479 B CN113691479 B CN 113691479B CN 202110799921 A CN202110799921 A CN 202110799921A CN 113691479 B CN113691479 B CN 113691479B
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- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- H04L27/26265—Arrangements for sidelobes suppression specially adapted to multicarrier systems, e.g. spectral precoding
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method, a device and a readable storage medium for eliminating side lobe influence of a signal, which belong to the technical field of electronic communication.
Description
Technical Field
The invention belongs to the technical field of electronic communication, and particularly relates to a method and a device for eliminating side lobe influence of a signal.
Background
Under the general condition, a receiving antenna of the broadband radio frequency system can be divided into a main lobe of a main signal and a side lobe signal beside the main lobe according to a signal pattern of the antenna, and the larger and better the main lobe of the signal are generally required as characteristics of the antenna radiation signal, the smaller and better the side lobe of the signal are, so that influence of the side lobe of the signal on the main lobe can be reduced, but no matter how designed, the main lobe and the side lobe can be always generated in the signals radiated and received by the antenna due to the characteristics of the antenna, the electrical performance index of the antenna can only suppress the magnitude of the side lobe relative to the main lobe, and the side lobe cannot be completely eliminated, so that the error and the accuracy of a measurement signal are unstable for a high-sensitivity receiving system as long as the side lobe exists.
Disclosure of Invention
In view of the above, the present invention aims to provide a method and apparatus for eliminating side lobe effects of a signal to achieve the purpose of measuring only a main lobe of a received signal, and measuring accuracy can be more accurate.
The technical scheme adopted by the invention is as follows: a method of signal cancellation sidelobe effects, the method comprising:
s1: receiving signals of a target radiation source at different frequencies at different angles according to a multi-unit receiving antenna;
s2: measuring the signal intensity of each same frequency of the multi-unit receiving antenna at each fixed angle;
s3: acquiring the maximum value of the signal intensity received by each antenna in a plurality of antennas at the same angle and the same frequency;
s4: calculating the average value of the maximum value of the signal intensity received by each antenna in the plurality of antennas at the same angle and the same frequency to obtain an average value A of the side lobes of the cut signal;
s5: obtaining the maximum value Z in the signal intensity received by all antennas at the same angle and the same frequency;
s6: calculating a sidelobe cutting coefficient according to the average value A and the maximum value Z;
s7: repeating the steps S2 to S6, respectively obtaining the sidelobe cutting coefficients corresponding to each same frequency at different fixed angles, and generating a sidelobe cutting coefficient table of different frequencies at all angles;
s8: and the broadband radio frequency receiving system only keeps the main signal lobe of the target radiation source by utilizing the side lobe cutting coefficient table.
Further, in step S1, the multi-element receiving antenna is adapted to the broadband radio frequency receiving system, which receives signals of the target radiation source through the multi-element receiving antenna.
Further, in step S6, the formula for calculating the cut sidelobe coefficients is:
cut sidelobe coefficient = maximum Z-average a-3dB;
the sidelobe cutting coefficient is the angle and frequency corresponding to the current maximum value Z and the average value A, and the sidelobe cutting coefficient table is composed of a plurality of sidelobe cutting coefficients.
Further, in step S7, after the table of sidelobe-cutting coefficients is generated, a fitting curve of the sidelobe-cutting coefficients corresponding to each frequency in different angular directions is generated by MATLAB software, so that a worker can perform related analysis processing on the operation state of the broadband radio frequency receiving system.
Further, in step S8, the sidelobe cut coefficient table is loaded into the wideband radio frequency receiving system for operation, and the sidelobe cut coefficient table is loaded into the TXT file for operation.
Further, in step S8, when a signal is received, the maximum value Z in the signal intensities received by all the antennas is subtracted by the sidelobe cutting coefficient corresponding to the corresponding frequency of the currently received signal to obtain the threshold value of the received signal, and all the signals below the threshold value are cut off, so that only the main signal lobe of the target radiation source is reserved, and the measurement accuracy can be more accurate and the reliability is stronger.
In the present invention, there is also provided an apparatus for canceling side lobe influence of a signal, the apparatus being applied to a broadband radio frequency receiving system, comprising: a memory and a processor; the memory is used for storing program codes;
the processor is used for calling the program code, and when the program code is executed, the processor is used for executing steps S1-S7 in the method for eliminating the side lobe influence by the signals and generating a side lobe cutting coefficient table;
the processor is in communication connection with the broadband radio frequency receiving system, uploads the side lobe cutting coefficient table to the broadband radio frequency receiving system, and only the main lobe of the received signal is measured through the broadband radio frequency receiving system.
The invention also provides a readable storage medium, which is characterized in that the readable storage medium stores a computer program, and the computer program is executed by a processor to realize the method for eliminating side lobe influence of the signal.
The beneficial effects of the invention are as follows:
1. the method, the device and the readable storage medium for eliminating the side lobe influence of the signal provided by the invention are adopted to obtain the side lobe cutting coefficient table of the target radiation source by processing the signal received by the multi-unit receiving antenna of the broadband radio frequency receiving system, the side lobe cutting coefficient table is loaded to the broadband radio frequency receiving system, and the broadband radio frequency receiving system only carries out main lobe measurement on the received target radiation source signal, so that the measurement accuracy can be more accurate and the measurement error can be reduced to the maximum extent.
Drawings
FIG. 1 is a corresponding workflow diagram of a method for eliminating side lobe effects of a signal provided by the present invention;
fig. 2 is a schematic diagram of a fitted curve generated by the method for eliminating side lobe influence of signals provided by the invention.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar modules or modules having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.
Example 1
In this embodiment, a method for eliminating side lobe influence of a signal is specifically provided, and the method processes a signal received by a multi-unit receiving antenna of a broadband radio frequency receiving system, so that the broadband radio frequency receiving system only processes a main lobe signal of the signal, and the measurement accuracy of the received signal can be more accurate.
As shown in fig. 1, the method includes the following:
s1: in a broadband radio frequency receiving system, signals of a target radiation source at different frequencies are received according to different angles of a multi-unit receiving antenna; the broadband radio frequency receiving system is widely used in the fields of control, analysis instruments, chemistry, medical treatment, communication and the like, and achieves the functions of ultra-wideband communication, ultra-wideband detection, ultra-wideband imaging and the like; the multi-unit receiving antenna is an antenna system formed by arranging a plurality of identical single independent antennas (such as symmetrical antennas) according to a certain rule, and is also called an antenna array; a radiation source (radiation source) refers to a substance or device capable of emitting ionizing radiation.
S2: measuring the signal strength of each of the same frequencies of the multi-element receive antenna over a fixed angle, for example: signal intensity at a certain fixed angle and a certain frequency point; in practical application, the normal position of the multi-unit receiving antenna is 0 degree, signals of the target radiation source are received from the normal position of the multi-unit receiving antenna in all the angle directions, and all signals of each same frequency in the same direction angle are recorded;
meanwhile, it should be checked whether the signal data stored at each direction angle satisfies the requirement, ensuring that each signal does not have abrupt change in signal strength, wherein the checking logic is as follows: if the signal data is qualified, the corresponding signal data can be called and the subsequent logic operation is carried out; if the signal data is not qualified, the signal data is prompted to be unqualified and terminated.
S3: comparing the signal strengths of all signals of each antenna in the same angular direction and the same frequency at the same angle and the same frequency (with respect to step S2), and so on, the maximum value of the signal strength received by each of the plurality of antennas of the multi-unit receiving antenna can be obtained, that is: a maximum value of signal strength received by each of the plurality of antennas;
s4: calculating an average of the maximum values of the signal intensities received for each of the plurality of antennas of the multi-unit receiving antenna at the same angle and the same frequency (with respect to step S2), the average = sum of the maximum values of the signal intensities +.;
s5: at the same angle and at the same frequency (relative to step S2), obtaining the signal intensities received by all the antennas in the multi-unit receiving antenna, and taking the maximum value Z among the signal intensities;
s6: calculating a sidelobe cutting coefficient according to the average value A and the maximum value Z; the formula for calculating the cut sidelobe coefficients is:
cut sidelobe coefficient = maximum Z-average a-3dB;
the sidelobe cutting coefficient is a coefficient value corresponding to the angle and the frequency corresponding to the current maximum value Z and the average value A; the 3dB is a microwave professional term, and the 3dB bandwidth means a frequency range defined when the highest point of the power spectral density is reduced to 1/2, i.e. the signal strength is reduced by half.
S7: repeating the steps S2-S6, respectively obtaining the sidelobe cutting coefficients corresponding to each same frequency in different angle directions, and generating a sidelobe cutting coefficient table of different frequencies in all angle directions, wherein the sidelobe cutting coefficient table is presented in a TXT file in actual application;
after the sidelobe-cutting coefficient table is generated, fitting curves of sidelobe-cutting coefficients corresponding to the frequencies in different angle directions are automatically generated through MATLAB software, and the fitting curves are shown in FIG. 2; the relation between each frequency and the sidelobe cutting coefficient can be intuitively observed through a fitting curve, so that a worker can analyze and process the operation state of the broadband radio frequency receiving system in a correlated way.
S8: and loading the side lobe cutting coefficient table into a broadband radio frequency receiving system for operation, when signals are received, subtracting the side lobe cutting coefficient corresponding to the corresponding frequency of the currently received signals (the corresponding frequency refers to the currently received frequency point, such as 4GHz,4.1GHz and the like, and a specific frequency point) from the maximum value Z in the signal intensity received by all antennas to obtain the threshold value of the received signals, and cutting off all signals below the threshold value to realize that only the signal main lobe of the target radiation source is reserved.
Example 2
In the present invention, there is also provided an apparatus for canceling side lobe influence of a signal, the apparatus being applied to a broadband radio frequency receiving system, comprising: a memory and a processor; the memory is used for storing program codes;
the processor is configured to invoke the program code, and when the program code is executed, perform steps S1-S7 in the method for eliminating side lobe effects of signals as described in the above embodiment 1, and generate a side lobe cut coefficient table;
the processor is in communication connection with the broadband radio frequency receiving system, and in practical application, the communication mode can be wire or wireless communication, and uploads a side lobe cutting coefficient table to the broadband radio frequency receiving system, and the broadband radio frequency receiving system calculates a threshold value of a received signal and cuts off all signals below the threshold value so as to only measure a main lobe of the received signal through the broadband radio frequency receiving system.
Example 3
In the present invention, there is also provided a computer-readable storage medium having stored therein a computer program which, when executed by a processor, implements the above-described method of eliminating side lobe effects of a signal as described in embodiment 1.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (6)
1. A method of canceling side lobe effects in a signal, the method comprising:
s1: receiving signals of a target radiation source at different frequencies at different angles according to a multi-unit receiving antenna;
s2: measuring the signal intensity of each same frequency of the multi-unit receiving antenna at each fixed angle;
s3: acquiring the maximum value of the signal intensity received by each antenna in a plurality of antennas at the same angle and the same frequency;
s4: calculating the average value of the maximum value of the signal intensity received by each antenna in the plurality of antennas at the same angle and the same frequency to obtain an average value A of the side lobes of the cut signal;
s5: obtaining the maximum value Z in the signal intensity received by all antennas at the same angle and the same frequency;
s6: calculating a sidelobe cutting coefficient according to the average value A and the maximum value Z; the formula for calculating the cut sidelobe coefficients is:
cut sidelobe coefficient = maximum Z-average a-3dB;
the sidelobe cutting coefficient is the angle and the frequency corresponding to the current maximum value Z and the average value A;
s7: repeating the steps S2 to S6, respectively obtaining the sidelobe cutting coefficients corresponding to each same frequency at different fixed angles, and generating a sidelobe cutting coefficient table of different frequencies at all angles;
s8: the broadband radio frequency receiving system only keeps the main signal lobe of the target radiation source by utilizing the side lobe cutting coefficient table; when signals are received, the maximum value Z in the signal intensity received by all the antennas is subtracted by the sidelobe cutting coefficient corresponding to the corresponding frequency of the currently received signals to obtain the threshold value of the received signals, and all the signals below the threshold value are cut off, so that only the main signal lobe of the target radiation source is reserved.
2. The method of claim 1, wherein in step S1, a multi-element receiving antenna is adapted to the wideband radio frequency receiving system.
3. The method according to claim 1, wherein in step S7, after generating the table of side lobe cut coefficients, fitting curves of side lobe cut coefficients corresponding to respective frequencies in different angular directions are generated by MATLAB software.
4. The method according to claim 1, wherein in step S8, the sidelobe cut coefficient table is loaded into a broadband radio frequency receiving system for operation.
5. An apparatus for canceling side lobe effects in a signal for use in a wideband radio frequency receiver system, the apparatus comprising: a memory and a processor; the memory is used for storing program codes;
the processor is configured to invoke the program code, when the program code is executed, perform steps S1-S7 in the method for eliminating side lobe effects of the signal according to any one of claims 1-4, and generate a side lobe cut coefficient table;
the processor is in communication connection with the broadband radio frequency receiving system, uploads the side lobe cutting coefficient table to the broadband radio frequency receiving system, and only the main lobe of the received signal is measured through the broadband radio frequency receiving system.
6. A readable storage medium, characterized in that a computer program is stored in the readable storage medium, which computer program, when being executed by a processor, implements a method of eliminating side lobe effects of a signal according to any of claims 1-4.
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