Antenna coupling management method based on multiple-input multiple-output technology

Abstract

The invention relates to the technical field of multiple-input-multiple-output antennas, and particularly discloses an antenna coupling management method based on a multiple-input-multiple-output technology, which is used for solving the problem that it is difficult to ensure that frequency deviation is completely corrected when the frequency deviation of a multiple-input-multiple-output antenna is calibrated. According to the invention, the first working parameter, the second working parameter and the third working parameter are obtained, the coupling interference value of the multiple-input-multiple-output antenna unit is determined by the first working parameter, and the frequency deviation value of the multiple-input-multiple-output antenna unit is determined based on the coupling interference value and the second working parameter. And the third working parameter is extracted to calculate the frequency correction value of the MIMO antenna unit, and the correction qualified value of the MIMO antenna unit is determined based on the frequency expected value, the frequency correction value and the frequency deviation value, so that the frequency deviation problem can be timely found and processed, and the troubleshooting efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of multiple-input multiple-output (MIMO) antenna technology, and more specifically, to an antenna coupling management method based on MIMO technology. Background Technology

[0002] Multiple-input multiple-output (MIMO) technology in communication systems uses multiple antenna elements to transmit multiple data streams simultaneously at the transmitter and receiver. In this system, the multipath components increase with the distance between antenna elements, leading to more independent multipath fading between antenna pairs at the transmitter and receiver, and consequently, more independent channels. Applying MIMO to antennas effectively utilizes multipath fading to combat fading and noise, reducing interference and significantly improving channel capacity, data transmission rate, and spectral efficiency. However, as the number of antenna elements increases and the overall antenna array becomes smaller, strong mutual coupling occurs between antennas, degrading the performance of MIMO antennas. Therefore, reducing the coupling effect between MIMO antenna elements to improve the overall performance of the antenna system is essential.

[0003] In existing publicly available literature, in the paper (Design of miniaturized tri-Band wearable antenna based on characteristic mode theory. Progress In Electromagnetics Research C, 2023, Vol. 132, 187-203), I fabricated a tri-band wearable antenna with a metal frame. This antenna covers Bluetooth / Wi-Fi (2.4G, 5.8G) and the N78 band. My subsequent research focused on the following antenna systems: first, a multiple-input multiple-output (MIMO) antenna for WLAN / WiMAX wireless terminals, but this cannot fully meet the requirements of multi-band communication for RFID and GPS; second, a 3D dual-element MIMO antenna system for WLAN / WiMAX / WiFi applications. When this system determines the coupling degree between multiple input multiple output antenna elements, the frequency offset of the antenna elements is caused by mutual coupling between them, which prevents the communication system from working normally at the expected frequency. Multiple recalibrations are required to correct the frequency offset. However, it is difficult to guarantee that the frequency offset is completely corrected during the calibration process. The remaining frequency offset will lead to a decrease in signal quality, resulting in the instability of the communication system. In order to solve the above problems, a technical solution is provided. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, this invention provides an antenna coupling management method based on multiple-input multiple-output (MIMO) technology. By calculating and determining the coupling interference value, frequency deviation value, and frequency correction value of the MIMO antenna element, and based on the expected frequency value, frequency correction value, and frequency deviation value, the corrected pass value of the MIMO antenna element is determined. This helps to detect and handle frequency offset problems in a timely manner, thereby improving the efficiency of fault diagnosis and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An antenna coupling management method based on multiple-input multiple-output (MIMO) technology includes the following steps:

[0007] Step S1: Obtain the first operating parameters of the multiple input multiple output antenna element and the second operating parameters of the output signal frequency;

[0008] Step S2: Calculate the coupling interference value of the multi-input multi-output antenna element by importing the first working parameter into the antenna coupling interference value calculation formula;

[0009] Step S3: Determine the frequency deviation value of the multi-input multi-output antenna element by using the coupling interference value and the second operating parameter, and determine whether the multi-input multi-output antenna element has a frequency deviation based on the frequency deviation value;

[0010] Step S4: Obtain the third working parameter after the MIMO antenna correction, and calculate the frequency correction value of the MIMO antenna element by importing the third working parameter into the antenna frequency correction value calculation formula.

[0011] Step S5: Extract the expected frequency value, corrected frequency value, and frequency deviation value of the multi-input multi-output antenna element, and import the expected frequency value, corrected frequency value, and frequency deviation value into the antenna correction qualification value calculation formula to calculate the correction qualification value of the multi-input multi-output antenna element.

[0012] Step S6: By comparing the correction pass value of the multi-input multi-output antenna element with the preset correction pass threshold, if the correction pass value is greater than or equal to the preset correction pass threshold, there is no frequency offset; if the correction pass value is less than the preset correction pass threshold, there is still a frequency offset. Investigate and analyze the cause and handle it accordingly. After handling, repeat the above S1-S5 until the correction pass value is greater than or equal to the preset correction pass threshold.

[0013] As a further aspect of the present invention, in S1, the first operating parameter includes the physical spacing and angular deviation value between the multiple input multiple output antenna elements; the second operating parameter includes the frequency relative deviation value of the output signal frequency of the multiple input multiple output antenna elements relative to the expected frequency; and the third operating parameter includes the frequency relative deviation value of the corrected output signal frequency of the multiple input multiple output antenna elements relative to the expected frequency.

[0014] As a further aspect of the present invention, in S2, the physical spacing and angle deviation values ​​between the multi-input multi-output antenna elements are extracted from the first operating parameters, and then imported into the antenna coupling interference value calculation formula to calculate the coupling interference value of the multi-input multi-output antenna elements. The antenna coupling interference value calculation formula is as follows:

[0015]

[0016] In the formula: u ta Here, N represents the coupling interference value of a multi-input multi-output (MIMO) antenna element, and N is the number of MIMO antenna elements. This represents the minimum angular deviation value between multiple input multiple output antenna elements. This represents the angular deviation value between multiple input multiple output antenna element i and multiple input multiple output antenna element j. This represents the maximum angular deviation value between multiple input multiple output antenna elements. This represents the maximum physical spacing between multiple-input multiple-output antenna elements. The physical spacing between multiple input multiple output antenna element i and multiple input multiple output antenna element j. This is the minimum physical spacing between multiple-input multiple-output antenna elements.

[0017] As a further aspect of the present invention, in S3, the specific steps for determining whether a multi-input multi-output antenna element has a frequency deviation based on the frequency deviation value are as follows:

[0018] Step S31: Extract the coupling interference value and the second operating parameter, and import the extracted coupling interference value and the second operating parameter into the antenna frequency deviation calculation formula to calculate the frequency deviation value of the multi-input multi-output antenna element. The antenna frequency deviation calculation formula is as follows:

[0019]

[0020] In the formula: t Δf Here, u represents the frequency offset value of a multi-input multi-output antenna element, N is the number of multi-input multi-output antenna elements, and u represents the frequency offset value of the multi-input multi-output antenna element. ta The coupling interference value of the multi-input multi-output antenna element is Δf.i Let Δf be the relative frequency deviation of the output signal frequency of the multi-input multi-output antenna element i from the expected frequency. i max Δf represents the maximum frequency relative deviation of the output signal frequency of the multi-input multi-output antenna element from the expected frequency. i min This is the minimum frequency relative deviation of the output signal frequency of the multi-input multi-output antenna element from the expected frequency;

[0021] Step S32: Extract the frequency deviation value of the multi-input multi-output antenna element and compare the frequency deviation value of the multi-input multi-output antenna element with the preset frequency deviation threshold.

[0022] Step S33: If the frequency deviation value of the multi-input multi-output antenna element is greater than or equal to the preset frequency deviation threshold, then the multi-input multi-output antenna element has a frequency deviation; if the frequency deviation value of the multi-input multi-output antenna element is less than the preset frequency deviation threshold, then the multi-input multi-output antenna element does not have a frequency deviation.

[0023] As a further aspect of the present invention, in S5, the expected frequency value, the corrected frequency value, and the frequency deviation value of the multi-input multi-output antenna element are extracted, and the expected frequency value, the corrected frequency value, and the frequency deviation value are imported into the antenna correction qualification value calculation formula to calculate the correction qualification value of the multi-input multi-output antenna element. The antenna correction qualification value calculation formula is as follows:

[0024] h tr =|1-t Δf -z Δs |×f q ;

[0025] Where: h tr For the corrected pass value of the multi-input multi-output antenna element, t Δf The frequency offset value of the multi-input multi-output antenna element, z Δs f is the frequency correction value for a multi-input multi-output antenna element. q This represents the expected frequency value for the multi-input multi-output antenna element.

[0026] The technical effects and advantages of this invention's antenna coupling management method based on multiple-input multiple-output (MIMO) technology are as follows: By acquiring first, second, and third operating parameters, the invention helps accurately assess the impact of frequency offset by determining the coupling interference value of the MIMO antenna element using the first operating parameter. Based on the coupling interference value and the second operating parameter, the invention determines the frequency deviation value of the MIMO antenna element, thus accurately identifying the existence of a frequency offset problem and providing a basis for subsequent correction. Extracting the third operating parameter to calculate the frequency correction value of the MIMO antenna element helps to accurately and quickly correct frequency offset. Determining the correction qualification value of the MIMO antenna element based on the expected frequency value, the corrected frequency value, and the frequency deviation value enables automatic evaluation of the correction qualification of the MIMO antenna element, facilitating timely detection and handling of frequency offset problems, thereby improving the efficiency of fault diagnosis. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating an antenna coupling management method based on multiple-input multiple-output technology provided in Embodiment 1 of the present invention. Detailed Implementation

[0028] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described technical solutions are only a part of this invention, and not all of it. All other technical solutions obtained by those skilled in the art based on the technical solutions of this invention without inventive effort are within the scope of protection of this invention.

[0029] Example 1

[0030] Figure 1 This diagram illustrates a flowchart of an antenna coupling management method based on multiple-input multiple-output (MIMO) technology according to Embodiment 1 of the present invention. Figure 1 As shown in this embodiment, an antenna coupling management method based on multiple-input multiple-output (MIMO) technology includes the following steps:

[0031] Step S1: Obtain the first operating parameters of the multiple input multiple output antenna element and the second operating parameters of the output signal frequency;

[0032] Step S2: Calculate the coupling interference value of the multi-input multi-output antenna element by importing the first working parameter into the antenna coupling interference value calculation formula;

[0033] Step S3: Determine the frequency deviation value of the multi-input multi-output antenna element by using the coupling interference value and the second operating parameter, and determine whether the multi-input multi-output antenna element has a frequency deviation based on the frequency deviation value;

[0034] Step S4: Obtain the third working parameter after the MIMO antenna correction, and calculate the frequency correction value of the MIMO antenna element by importing the third working parameter into the antenna frequency correction value calculation formula.

[0035] Step S5: Extract the expected frequency value, corrected frequency value, and frequency deviation value of the multi-input multi-output antenna element, and import the expected frequency value, corrected frequency value, and frequency deviation value into the antenna correction qualification value calculation formula to calculate the correction qualification value of the multi-input multi-output antenna element.

[0036] Step S6: By comparing the correction pass value of the multi-input multi-output antenna element with the preset correction pass threshold, if the correction pass value is greater than or equal to the preset correction pass threshold, there is no frequency offset; if the correction pass value is less than the preset correction pass threshold, there is still a frequency offset. Investigate and analyze the cause and handle it accordingly. After handling, repeat the above S1-S5 until the correction pass value is greater than or equal to the preset correction pass threshold.

[0037] In step S1, the first operating parameter includes the physical spacing and angle deviation value between the multiple input multiple output antenna elements; the second operating parameter includes the frequency relative deviation value of the output signal frequency of the multiple input multiple output antenna elements relative to the expected frequency; and the third operating parameter includes the frequency relative deviation value of the corrected output signal frequency of the multiple input multiple output antenna elements relative to the expected frequency.

[0038] The physical spacing and angular deviation values ​​between the multi-input multi-output (MIMO) antenna elements are obtained through measuring equipment. The frequency relative deviation value of the output signal frequency of the MIMO antenna element relative to the expected frequency is measured by a spectrum analyzer or signal analyzer to determine the actual frequency of the output signal of the MIMO antenna element and calculate the difference between it and the expected frequency, thus determining the frequency relative deviation value of the output signal frequency relative to the expected frequency. The frequency relative deviation value of the corrected output signal frequency of the MIMO antenna element relative to the expected frequency is also measured by a spectrum analyzer or signal analyzer to determine the actual frequency of the corrected output signal of the MIMO antenna element and calculate the difference between it and the expected frequency, thus determining the frequency relative deviation value of the corrected output signal frequency relative to the expected frequency.

[0039] In S2, the physical spacing and angular deviation values ​​between the multi-input multi-output antenna elements are extracted from the first operating parameters. These values ​​are then imported into the antenna coupling interference value calculation formula to calculate the coupling interference value of the multi-input multi-output antenna elements. The antenna coupling interference value calculation formula is as follows:

[0040]

[0041] In the formula: u ta Here, N represents the coupling interference value of a multi-input multi-output (MIMO) antenna element, and N is the number of MIMO antenna elements. This represents the minimum angular deviation value between multiple input multiple output antenna elements. This represents the angular deviation value between multiple input multiple output antenna element i and multiple input multiple output antenna element j. This represents the maximum angular deviation value between multiple input multiple output antenna elements. This represents the maximum physical spacing between multiple-input multiple-output antenna elements. The physical spacing between multiple input multiple output antenna element i and multiple input multiple output antenna element j. This is the minimum physical spacing between multiple-input multiple-output antenna elements.

[0042] Extract the coupling interference value of the multi-input multi-output antenna element, and compare the coupling interference value of the multi-input multi-output antenna element with the coupling interference threshold. If the coupling interference value of the multi-input multi-output antenna element is greater than or equal to the coupling interference threshold, then there is a frequency shift; if the coupling interference value of the multi-input multi-output antenna element is less than the coupling interference threshold, then there is no frequency shift.

[0043] Taking physical spacing and angular deviation values ​​into account allows for a more accurate assessment of the coupling between multiple input multiple output antenna elements, improving the calculation accuracy of coupling interference values. Considering physical spacing and angular deviation values ​​provides a comprehensive view of the antenna layout, including the distance and direction between antennas, thus more accurately reflecting the actual coupling situation. By comparing the coupling interference value with the coupling interference threshold, potential frequency shift problems can be detected early. If the coupling interference value exceeds the threshold, a frequency shift can be identified, allowing for timely correction measures to prevent the frequency shift from affecting system performance. This helps to promptly identify and resolve potential frequency shift problems, reducing the risk of frequency shift to system performance and ensuring system stability and reliability.

[0044] In step S3, the specific steps for determining whether a multi-input multi-output antenna element has a frequency deviation based on the frequency deviation value are as follows:

[0045] Step S31: Extract the coupling interference value and the second working parameter, and import the extracted coupling interference value and the second working parameter into the antenna frequency deviation value calculation formula to calculate the frequency deviation value of the multi-input multi-output antenna element.

[0046] Step S32: Extract the frequency deviation value of the multi-input multi-output antenna element and compare the frequency deviation value of the multi-input multi-output antenna element with the preset frequency deviation threshold.

[0047] Step S33: If the frequency deviation value of the multi-input multi-output antenna element is greater than or equal to the preset frequency deviation threshold, then the multi-input multi-output antenna element has a frequency deviation; if the frequency deviation value of the multi-input multi-output antenna element is less than the preset frequency deviation threshold, then the multi-input multi-output antenna element does not have a frequency deviation.

[0048] In step S31, the coupling interference value and the frequency relative deviation value of the multi-input multi-output antenna unit output signal frequency relative to the expected frequency from the second operating parameters are extracted. These extracted coupling interference values ​​and frequency relative deviation values ​​are then imported into the antenna frequency deviation calculation formula to calculate the frequency deviation value of the multi-input multi-output antenna unit. The antenna frequency deviation value calculation formula is as follows:

[0049]

[0050] In the formula: t Δf Here, u represents the frequency offset value of a multi-input multi-output antenna element, N is the number of multi-input multi-output antenna elements, and u represents the frequency offset value of the multi-input multi-output antenna element. ta The coupling interference value of the multi-input multi-output antenna element is Δf. i Let Δf be the relative frequency deviation of the output signal frequency of the multi-input multi-output antenna element i from the expected frequency. i max Δf represents the maximum frequency relative deviation of the output signal frequency of the multi-input multi-output antenna element from the expected frequency. i min This is the minimum frequency relative deviation of the output signal frequency of the multi-input multi-output antenna element from the expected frequency.

[0051] By considering the impact of coupling interference on frequency, the calculated frequency deviation value more accurately reflects the actual situation and can more accurately determine whether there is a frequency deviation in the antenna element. Through an automated frequency deviation judgment process, frequency deviation problems of the antenna element can be detected in a timely manner, which is conducive to taking timely measures to correct them and avoid the impact of frequency deviation on system performance.

[0052] In S4, the relative frequency deviation of the corrected output signal frequency of the MIMO antenna element relative to the expected frequency is obtained from the third operating parameter after MIMO antenna correction. This relative frequency deviation is then imported into the antenna frequency correction value calculation formula to calculate the frequency correction value of the MIMO antenna element. The antenna frequency correction value calculation formula is as follows:

[0053]

[0054] In the formula: z Δs Here, u represents the frequency correction value for a multi-input multi-output (MIMO) antenna element, N is the number of MIMO antenna elements, and u is the frequency correction value for the multi-input multi-output (MIMO) antenna element. ta The coupling interference value of the multi-input multi-output antenna element is Δs. i The frequency relative deviation of the output signal frequency of the multi-input multi-output antenna element i after correction from the expected frequency. This represents the maximum relative frequency deviation of the output signal frequency after correction by the multi-input multi-output antenna element relative to the expected frequency. This is the minimum frequency relative deviation of the output signal frequency after correction of the multi-input multi-output antenna element relative to the expected frequency.

[0055] By using the relative deviation of the corrected output signal frequency from the expected frequency, the frequency correction value of the MIMO antenna element can be calculated more accurately, improving the accuracy of the correction. Incorporating the relative deviation of the corrected output signal frequency into the calculation formula comprehensively considers the impact of coupling interference and the frequency deviation of the corrected signal on the frequency correction value, making the calculation results more comprehensive and reasonable. Automated calculation of the frequency correction value improves the efficiency of the correction, reduces the need for manual intervention, and saves time and labor costs. Through the calculation and correction of the frequency correction value, the frequency of each antenna element in the MIMO system is kept within the expected range, improving the stability and reliability of the system.

[0056] In S5, the expected frequency value, corrected frequency value, and frequency deviation value of the multi-input multi-output antenna element are extracted. These values ​​are then imported into the antenna correction pass value calculation formula to calculate the correction pass value of the multi-input multi-output antenna element. The antenna correction pass value calculation formula is as follows:

[0057] h tr =|1-t Δf -z Δs |×f q ;

[0058] Where: h tr For the corrected pass value of the multi-input multi-output antenna element, tΔf The frequency offset value of the multi-input multi-output antenna element, z Δs f is the frequency correction value for a multi-input multi-output antenna element. q This represents the expected frequency value for the multi-input multi-output antenna element.

[0059] By analyzing the antenna's expected frequency, corrected frequency, and frequency deviation, its performance can be comprehensively evaluated, including both expected performance and actual correction effectiveness. Calculating the antenna's corrected pass value allows for a quantitative assessment of the correction's effectiveness, determining whether the correction has met expectations and enhancing the reliability of the results. Using the corrected pass value as an evaluation standard, based on preset thresholds, allows for standardized assessment of whether antenna correction has met requirements, facilitating standardized evaluation and management of antenna performance. Monitoring the corrected pass value enables timely detection of substandard correction results, allowing for recalibration and improving system stability and reliability.

[0060] This invention, through obtaining a first operating parameter, a second operating parameter, and a third operating parameter, determines the coupling interference value of the multi-input multi-output (MIMO) antenna element using the first operating parameter, which helps to accurately assess the impact of frequency offset. Based on the coupling interference value and the second operating parameter, the frequency deviation value of the MIMO antenna element is determined, enabling accurate assessment of the existence of a frequency offset problem and providing a basis for subsequent correction. Extracting the third operating parameter to calculate the frequency correction value of the MIMO antenna element helps to accurately and quickly correct frequency offset. Based on the expected frequency value, the corrected frequency value, and the frequency deviation value, the correction pass value of the MIMO antenna element is determined, achieving automatic evaluation of the correction passability of the MIMO antenna element. This helps to promptly detect and handle frequency offset problems, thereby improving the efficiency of fault diagnosis.

[0061] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0062] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antenna coupling management method based on multiple-input multiple-output technology, characterized in that: The steps include: Step S1, obtaining a first operating parameter of a multiple-input multiple-output antenna unit and a second operating parameter of an output signal frequency; Step S2, calculating the coupling interference value of the multi-input multi-output antenna unit by importing the first operating parameter into the antenna coupling interference value calculation formula; Step S3, determining a frequency deviation value of the MIMO antenna unit by using the coupling interference value and the second operating parameter, and judging whether there is a frequency deviation of the MIMO antenna unit based on the frequency deviation value; Step S4, obtaining a third operating parameter of the MIMO antenna after correction, and calculating the frequency correction value of the MIMO antenna unit by importing the third operating parameter into the antenna frequency correction value calculation formula; Step S5, extracting the expected frequency value, the frequency correction value and the frequency deviation value of the multiple-input multiple-output antenna unit, importing the expected frequency value, the frequency correction value and the frequency deviation value into the antenna correction qualified value calculation formula, and calculating the correction qualified value of the multiple-input multiple-output antenna unit; Step S6, by comparing the corrected qualified value of the multi-input multi-output antenna unit with the preset corrected qualified threshold, if the corrected qualified value and the preset are greater than or equal to the corrected qualified threshold, there is no frequency offset; if the corrected qualified value and the preset are less than the corrected qualified threshold, there is still a frequency offset, and the cause is investigated and analyzed and processed in a targeted manner. After processing, the above steps S1-S5 are repeated until the corrected qualified value and the preset are greater than or equal to the corrected qualified threshold.

2. The antenna coupling management method based on multiple-input multiple-output technology according to claim 1, characterized in that: In step S1, the first operating parameter includes the physical spacing and angle deviation value between the multiple-input multiple-output antenna units; the second operating parameter includes the relative frequency deviation value of the output signal frequency of the multiple-input multiple-output antenna unit relative to the expected frequency; the third operating parameter includes the relative frequency deviation value of the output signal frequency of the multiple-input multiple-output antenna unit after correction relative to the expected frequency.

3. The antenna coupling management method based on multiple-input multiple-output technology according to claim 1, characterized in that: In step S2, by extracting the physical spacing and angle deviation values ​​between the multi-input multi-output antenna units in the first working parameter, the physical spacing and angle deviation values ​​between the multi-input multi-output antenna units are introduced into the antenna coupling interference value calculation formula to calculate the coupling interference value of the multi-input multi-output antenna unit. The antenna coupling interference value calculation formula is: Where: u ta is the coupling interference value of the MIMO antenna unit, N is the number of MIMO antenna units, is the minimum angle deviation between MIMO antenna units, is the angle deviation between MIMO antenna unit i and MIMO antenna unit j, is the maximum angle deviation between MIMO antenna units, is the maximum physical spacing between MIMO antenna elements, is the physical distance between MIMO antenna unit i and MIMO antenna unit j, It is the minimum physical distance between multiple-input multiple-output antenna elements.

4. The antenna coupling management method based on multiple-input multiple-output technology according to claim 1, characterized in that: In step S3, the specific steps of judging whether the MIMO antenna unit has a frequency deviation based on the frequency deviation value are as follows: Step S31, extracting the coupling interference value and the second operating parameter, importing the extracted coupling interference value and the second operating parameter into the antenna frequency deviation value calculation formula, calculating the frequency deviation value of the multi-input multi-output antenna unit, and calculating the frequency deviation value of the multi-input multi-output antenna unit. The antenna frequency deviation value calculation formula is: Where: t Δf is the frequency deviation value of the MIMO antenna unit, N is the number of MIMO antenna units, u ta is the coupling interference value of the multiple-input multiple-output antenna unit, Δf i is the relative frequency deviation of the output signal frequency of MIMO antenna unit i relative to the expected frequency, Δf i max Δf is the maximum relative frequency deviation of the output signal frequency of the MIMO antenna unit relative to the expected frequency, i min is the minimum relative frequency deviation value of the output signal frequency of the multiple-input multiple-output antenna unit relative to the expected frequency; Step S32, extracting the frequency deviation value of the MIMO antenna unit, and comparing the frequency deviation value of the MIMO antenna unit with a preset frequency deviation threshold; Step S33: if the frequency deviation value of the multi-input multi-output antenna unit is greater than or equal to the preset frequency deviation threshold, the multi-input multi-output antenna unit has a frequency deviation; if the frequency deviation value of the multi-input multi-output antenna unit is less than the preset frequency deviation threshold, the multi-input multi-output antenna unit does not have a frequency deviation.

5. The antenna coupling management method based on multiple-input multiple-output technology according to claim 1, characterized in that: In step S5, the frequency expected value, frequency correction value and frequency deviation value of the multi-input multi-output antenna unit are extracted, and the frequency expected value, frequency correction value and frequency deviation value are introduced into the antenna correction qualified value calculation formula to calculate the correction qualified value of the multi-input multi-output antenna unit. The antenna correction qualified value calculation formula is: h tr =|1-t Δf -z Δs |×f q ; Where: h tr is the corrected qualified value of the MIMO antenna unit, t Δf is the frequency deviation value of the MIMO antenna unit, z Δs is the frequency correction value of the MIMO antenna unit, f q is the expected value of the frequency of the MIMO antenna unit.

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