A method and system for adaptive tuning of radio frequency antennas in multiple frequency bands

Abstract

The present invention provides a method and system for adaptive tuning of radio frequency antennas in multiple frequency bands, which are applied to the field of communication data processing. The present invention collects interference signals through a preset spectrum monitoring instrument, extracts frequency offset and waveform features therefrom, and can accurately identify the type and source of the interference signal. This feature recognition helps to distinguish different types of interference signals. At the same time, by collecting interference characteristics such as time characteristics, spatial characteristics and channel characteristics, the frequency band range, frequency resolution and frequency step of the radio frequency antenna can be adjusted in real time to ensure that the antenna always operates in the optimal frequency band, thereby improving the isolation of the signal. Based on real-time spectrum sensing information, subcarriers are dynamically allocated, and frequency intervals are increased between frequency bands to effectively isolate signals in different frequency bands, thereby reducing adjacent frequency interference.

Description

Technical Field

[0001] The present invention relates to the field of communication data processing, and in particular to a method and system for adaptively tuning a radio frequency antenna for multiple frequency bands. Background Art

[0002] With the rapid development of wireless communication technology, the demand for spectrum resources of equipment is increasing. Especially in the 5G and future 6G era, the expansion of frequency band range and the demand for different application scenarios make multi-band RF antenna one of the key technologies. That is, multi-band RF antenna must be able to work efficiently in multiple frequency ranges to adapt to the communication requirements of different frequency bands.

[0003] However, due to the different frequency characteristics and bandwidth requirements of each frequency band, it is often difficult to ensure the matching performance of all frequency bands under broadband conditions during the tuning process. In particular, when multiple frequency bands share the same antenna structure, mutual interference between signals of different frequencies can easily cause intermodulation distortion and signal leakage, affecting communication quality. Summary of the invention

[0004] The present invention aims to solve the problem of how to reduce interference between different frequency bands and improve signal isolation, and provides a method and system for adaptively tuning a radio frequency antenna for multiple frequency bands.

[0005] The present invention adopts the following technical means to solve the technical problem:

[0006] The present invention provides a method for adaptively tuning a radio frequency antenna for multiple frequency bands, comprising:

[0007] A spectrum monitoring instrument preset based on a radio frequency antenna collects interference signals between different frequency bands and identifies corresponding signal features from the interference signals, wherein the signal features specifically include frequency offset and waveform;

[0008] Determining whether the signal characteristics match a preset interference source;

[0009] If so, according to the working requirements of the RF antenna in different frequency bands, activate the preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna, collect the interference characteristics of the frequency band in real time, and adaptively adjust the frequency band parameters of the RF antenna according to the interference characteristics, wherein the interference characteristics specifically include time characteristics, space characteristics and channel characteristics, and the frequency band parameters specifically include frequency band range, frequency resolution and frequency step;

[0010] Determining whether the frequency band parameters detect preset spectrum congestion;

[0011] If detected, the RF antenna is controlled to perform frequency hopping communication based on a preset frequency hopping sequence. According to the real-time spectrum sensing information of the RF antenna, dynamically allocated subcarriers are used to optimize the signal isolation of the RF antenna and increase the frequency interval between frequency band channels. The spectrum sensing information specifically includes signal strength, frequency band occupancy and signal utilization.

[0012] Furthermore, before the step of activating a preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna according to the working requirements of the RF antenna in different frequency bands, the step further includes:

[0013] Based on the preset network analyzer of the radio frequency antenna, the scattering parameters at both ends of the matching network are measured from the input end and the output end of the radio frequency antenna, and the corresponding input impedance curve and output impedance curve are drawn according to the scattering parameters;

[0014] Determining whether the input impedance curve and the output impedance curve are within a preset target frequency range;

[0015] If not, the transmission line characteristic parameters of the RF antenna are detected through both ends of the matching network, and the impedance discontinuity point of the RF antenna is identified according to the drawn impedance curve and the transmission line characteristic parameters, wherein the transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio.

[0016] Furthermore, the step of collecting interference characteristics of the frequency band in real time and adaptively adjusting the frequency band parameters of the radio frequency antenna according to the interference characteristics further includes:

[0017] Based on the frequency change of the interference signal, acquiring drift data of the interference signal, wherein the drift data specifically includes a drift amplitude and a drift speed;

[0018] Determining whether the drift data meets the preset multipath interference;

[0019] If so, identify the impact of the multipath effect on different frequency bands, calculate the destructive efficiency of the multipath interference on signal transmission at a specific frequency based on the impact, obtain the frequency selective fading corresponding to the multipath interference, and limit the modulation mode of the RF antenna based on the frequency selective fading, wherein the modulation mode specifically includes amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation.

[0020] Furthermore, before the step of controlling the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence, the method further includes:

[0021] Based on the preset main frequency band range of the radio frequency antenna, at least two sub-frequency bands are divided, and according to the spectrum management parameters of the sub-frequency bands, the preset radio frequency signal is divided into sub-signals of the corresponding number of sub-frequency bands, and the transmission power of the sub-signals is adaptively adjusted, wherein the spectrum management parameters specifically include bandwidth, interference conditions and data transmission requirements;

[0022] Determining whether multiple sub-signals are detected in a single sub-frequency band;

[0023] If so, a preset multi-carrier modulation technology is applied to generate carrier signals with mutually orthogonal frequencies, and the sub-signals are modulated onto corresponding carriers respectively, so that the sub-signals are independently transmitted through the sub-frequency bands, and the link quality of the sub-frequency bands is monitored in real time. The RF antenna is dynamically switched based on the link quality, wherein the link quality specifically includes the signal-to-noise ratio and the bit error rate.

[0024] Further, the step of controlling the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence includes:

[0025] Based on a pre-drawn spectrum interference distribution map, a frequency band interval state is identified from the spectrum interference distribution map, wherein the frequency band interval state specifically includes an interference-free frequency band and a severely interfered frequency band;

[0026] Determining whether the frequency band interval state meets the preset frequency hopping condition;

[0027] If so, a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate is selected from the frequency band interval status, the operating frequencies of the preset transmitter and the preset receiver are dynamically adjusted according to the frequency band interval status, the RF antenna is controlled to switch to the frequency band to be hopped, and the preset frequency hopping control signal of the RF antenna is activated during the frequency hopping process to maintain a continuous data link of the RF antenna.

[0028] Furthermore, the step of determining whether the signal feature matches a preset interference source further includes:

[0029] Based on the power spectral density of the radio frequency antenna, obtaining the intensity distribution and frequency range of the interference signal;

[0030] Determining whether the intensity distribution and the frequency range meet the interference source characteristics;

[0031] If so, the communication signal is collected simultaneously through the preset receiving point of the radio frequency antenna, the arrival angle and propagation path of the interference signal are identified, and the spatial distribution information of the interference signal in the frequency band is generated.

[0032] Furthermore, the spectrum monitoring instrument preset based on the radio frequency antenna collects interference signals between different frequency bands, and the step of identifying corresponding signal features from the interference signals also includes:

[0033] Based on the preset bit error rate thresholds of each frequency band, collecting the bit error rate baseline value under normal communication of the radio frequency antenna;

[0034] Determining whether the bit error rate baseline value exceeds the bit error rate threshold;

[0035] If so, monitor the fluctuation duration of the bit error rate baseline value, and obtain the change form of the interference signal according to the fluctuation duration, wherein the change form specifically includes instantaneous change and trend increase.

[0036] The present invention also provides a multi-band radio frequency antenna adaptive tuning system, comprising:

[0037] An acquisition module is used to acquire interference signals between different frequency bands based on a spectrum monitoring instrument preset by a radio frequency antenna, and identify corresponding signal features from the interference signals, wherein the signal features specifically include frequency offset and waveform;

[0038] A judgment module, used to judge whether the signal characteristics match a preset interference source;

[0039] an execution module, for, if so, activating a preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna according to the working requirements of the RF antenna in different frequency bands, collecting interference characteristics of the frequency band in real time, and adaptively adjusting the frequency band parameters of the RF antenna according to the interference characteristics, wherein the interference characteristics specifically include time characteristics, space characteristics, and channel characteristics, and the frequency band parameters specifically include frequency band range, frequency resolution, and frequency step;

[0040] A second determination module is used to determine whether the frequency band parameters detect preset spectrum congestion;

[0041] The second execution module is used to control the RF antenna to perform frequency hopping communication based on a preset frequency hopping sequence if detected, and to optimize the signal isolation of the RF antenna by applying dynamically allocated subcarriers according to the real-time spectrum sensing information of the RF antenna, and to increase the frequency interval between frequency band channels, wherein the spectrum sensing information specifically includes signal strength, frequency band occupancy and signal utilization.

[0042] Furthermore, it also includes:

[0043] A measurement module, configured to measure scattering parameters at both ends of a matching network from an input end and an output end of the RF antenna based on a network analyzer preset for the RF antenna, and to draw corresponding input impedance curves and output impedance curves according to the scattering parameters;

[0044] A third judgment module is used to judge whether the input impedance curve and the output impedance curve are within a preset target frequency range;

[0045] The third execution module is used to detect the transmission line characteristic parameters of the RF antenna through the two ends of the matching network, and identify the impedance discontinuity point of the RF antenna according to the drawn impedance curve and the transmission line characteristic parameters, wherein the transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio.

[0046] Furthermore, the execution module also includes:

[0047] An acquiring unit, configured to acquire drift data of the interference signal based on a frequency change of the interference signal, wherein the drift data specifically includes a drift amplitude and a drift speed;

[0048] A judging unit, used to judge whether the drift data meets the preset multipath interference;

[0049] An execution unit is used to, if yes, identify the impact of the multipath effect on different frequency bands, calculate the destructive efficiency of the multipath interference on signal transmission at a specific frequency according to the impact, obtain the frequency selective fading corresponding to the multipath interference, and limit the modulation mode of the RF antenna according to the frequency selective fading, wherein the modulation mode specifically includes amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation.

[0050] The present invention provides a method and system for adaptively tuning a radio frequency antenna in multiple frequency bands, which has the following beneficial effects:

[0051] The present invention collects interference signals through a preset spectrum monitoring instrument, extracts frequency offset and waveform features therefrom, and can accurately identify the type and source of the interference signal. This feature identification helps to distinguish different types of interference signals. At the same time, by collecting interference characteristics such as time characteristics, spatial characteristics and channel characteristics, the frequency band range, frequency resolution and frequency step of the radio frequency antenna can be adjusted in real time to ensure that the antenna always operates in the optimal frequency band, thereby improving the isolation of the signal. Based on real-time spectrum sensing information, subcarriers are dynamically allocated, and frequency intervals are increased between frequency bands to effectively isolate signals in different frequency bands, thereby reducing adjacent frequency interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of a flow chart of an embodiment of a method for adaptively tuning a radio frequency antenna in multiple frequency bands according to the present invention;

[0053] Figure 2 The structure block diagram of an embodiment of the radio frequency antenna adaptive tuning system for multiple frequency bands of the present invention. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The implementation of the objectives, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Reference Figure 1 , is a method for adaptively tuning a radio frequency antenna for multiple frequency bands in an embodiment of the present invention, comprising:

[0057] S1: A spectrum monitoring instrument preset based on a radio frequency antenna collects interference signals between different frequency bands and identifies corresponding signal features from the interference signals, wherein the signal features specifically include frequency offset and waveform;

[0058] S2: Determine whether the signal feature matches a preset interference source;

[0059] S3: If yes, then according to the working requirements of the RF antenna in different frequency bands, activate the preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna, collect the interference characteristics of the frequency band in real time, and adaptively adjust the frequency band parameters of the RF antenna according to the interference characteristics, wherein the interference characteristics specifically include time characteristics, space characteristics and channel characteristics, and the frequency band parameters specifically include frequency band range, frequency resolution and frequency step;

[0060] S4: Determine whether the frequency band parameters detect preset spectrum congestion;

[0061] S5: If detected, the RF antenna is controlled to perform frequency hopping communication based on a preset frequency hopping sequence, and according to the real-time spectrum sensing information of the RF antenna, the dynamically allocated subcarriers are applied to optimize the signal isolation of the RF antenna and increase the frequency interval between frequency band channels, wherein the spectrum sensing information specifically includes signal strength, frequency band occupancy and signal utilization.

[0062] In this embodiment, the system collects interference signals between different frequency bands based on the spectrum monitoring instrument pre-installed in the radio frequency antenna, identifies corresponding signal characteristics from these interference signals, and the signal characteristics specifically include frequency offset and waveform, and then the system determines whether these signal characteristics match the pre-set interference source to execute the corresponding steps; for example, when the system determines that the signal characteristics of the interference signal do not match the pre-set interference source, the system will consider that the unmatched interference signal may be sporadic or transient interference, which may come from environmental factors, short-term electronic equipment interference or transient misalignment of the communication system. This type of interference is not a fixed known interference source, and the system will perform short-term spectrum monitoring to record the duration of the interference signal. Time and frequency of occurrence. If the interference frequency is low or the duration is short, it can be judged as sporadic interference and no long-term countermeasures are required. However, if the interference continues to occur, the system needs to start the automatic interference shielding program or adjust the frequency band to avoid sporadic interference affecting communications. At the same time, the identification range of the interference source is expanded, and more dimensional feature extraction and comparison are performed to identify possible changes in the interference source. In addition, the time characteristics and intensity of the signal are combined to eliminate the misjudgment of environmental noise or non-interference signals. For example, when the system determines that the signal characteristics of the interference signal can match the pre-set interference source, the system will consider that the interference belongs to a known fixed interference source, and the system will activate the interference source according to the working requirements of the RF antenna in different frequency bands. The preset adjustable reactance element dynamically adjusts the impedance matching parameters of the RF antenna, collects the interference characteristics of the frequency band in real time, and the interference characteristics specifically include time characteristics, space characteristics and channel characteristics. According to different interference characteristics, the frequency band parameters of the RF antenna are adaptively adjusted. The frequency band parameters specifically include frequency band range, frequency resolution and frequency step; the system quickly identifies and determines whether the interference signal matches the preset interference source, so as to take corresponding interference suppression measures with a faster response speed. Matching the known interference source can specifically activate the adjustable reactance element to adjust the impedance matching parameters of the antenna, reduce signal reflection and interference effects, and improve anti-interference performance and communication stability. At the same time, according to the interference characteristics collected in real time, The system can adaptively adjust the frequency band range, frequency resolution and frequency step of the RF antenna, so that the antenna always works in the best communication frequency band and avoids the frequency area with serious interference. This adaptive adjustment mechanism ensures the frequency band utilization efficiency of the antenna in an interference environment and maintains high-quality signal transmission. In addition, since the system can collect interference characteristics in real time and adaptively adjust frequency band parameters, it has a strong ability to deal with interference in real time. Even if the characteristics of the interference signal change, the system can respond quickly to ensure that the communication quality is not affected by the interference change, thereby enhancing the robustness and stability of the system. The system then determines whether the frequency band parameters of the RF antenna detect the pre-set spectrum congestion to execute the corresponding steps.For example, when the system determines that the frequency band parameters of the RF antenna do not detect spectrum congestion, the system will consider that the frequency band is not overused in the current environment, the signal propagation environment is good, and there is less interference. The system will maintain the existing frequency band working status and continue to communicate in the current frequency band. By continuously monitoring the frequency band status, it ensures regular collection and analysis of the spectrum to prevent possible interference or congestion in the future. At the same time, it continues to maintain the existing frequency band and signal transmission strategy, which can appropriately reduce the power consumption of the system, further improve energy efficiency by optimizing transmission power or bandwidth usage, and maintain signal quality monitoring to prevent possible interference in the future, and maintain the current frequency band parameters. There is no need to perform frequency hopping or bandwidth adjustment. In this case, the frequency band resource allocation can be regularly optimized to ensure that timely adjustments can be made when possible spectrum demand changes in the future, and the frequency band occupancy continues to be dynamically monitored. For example, when the system determines that the frequency band parameters of the RF antenna detect spectrum congestion, the system will consider that the communication environment is overused, and the system will perform frequency hopping based on the pre-set frequency hopping. The sequence controls the RF antenna to perform frequency hopping communication. According to the real-time spectrum sensing information of the frequency hopping antenna, the spectrum sensing information specifically includes signal strength, frequency band occupancy rate and signal utilization rate. The dynamically allocated subcarrier is applied to optimize the signal isolation of the RF antenna and increase the frequency interval between frequency band signals. The system quickly switches to the frequency band with less interference or unoccupied through the preset frequency hopping sequence, avoiding signal conflicts in congested frequency bands. This frequency hopping mechanism ensures communication stability, reduces data transmission delays and bit error rates, and thus improves overall communication efficiency. At the same time, through real-time spectrum sensing information, the system can dynamically adjust the allocation of subcarriers and reasonably utilize spectrum resources in different frequency bands. This optimized utilization of spectrum resources avoids the waste of frequency bands, ensures the maximum transmission efficiency on multiple frequency bands, and improves spectrum utilization. In addition, by dynamically adjusting the subcarriers and increasing the frequency interval between frequency band signals, mutual interference between frequency bands can be effectively reduced, which can improve the signal isolation of different frequency bands, avoid interference between adjacent frequency bands, and ensure the signal transmission quality on each frequency band. ;

[0063] It should be noted that the preset adjustable reactance element is activated to dynamically adjust the impedance matching parameters of the radio frequency antenna. The specific examples are as follows:

[0064] Example 1: Antenna matching in wireless communication equipment,

[0065] Assume that the RF antenna of a mobile device is designed to be matched to 50 ohms at an operating frequency of 2.4 GHz. However, when the device moves to a different environment (such as close to a metal object or human body), the actual impedance of the antenna may change, for example, from 50 ohms to 40 ohms. In this case, the signal transmission efficiency decreases because of the impedance mismatch between the antenna and the transmission line.

[0066] Solution: The system detects the increase of the reflected signal through the internal impedance detection circuit, confirms that there is an impedance mismatch, activates the adjustable capacitor element, and adjusts the capacitance value to an appropriate level, so that the impedance of the antenna is adjusted to 50 ohms again, restoring the best matching state;

[0067] Result: Signal transmission efficiency is improved, power reflection is reduced, and data transmission quality is guaranteed;

[0068] Example 2: Dynamic impedance adjustment in a multi-band antenna system,

[0069] In an antenna system designed for multiple frequency bands (e.g., 700 MHz and 2600 MHz), different frequency bands may require different impedance matching. At 700 MHz, the antenna impedance is 60 ohms, while at 2600 MHz, the antenna impedance is 40 ohms.

[0070] Solution: When the system switches to a different frequency band, the impedance of the current operating frequency band is detected and different adjustable reactance elements are activated (for example, an adjustable inductor is used in the 700 MHz band and an adjustable capacitor is used in the 2600 MHz band) to dynamically adjust the antenna impedance to achieve the best match for each frequency band.

[0071] The result: a system that can achieve efficient signal transmission in multiple frequency bands without changing antennas or manually adjusting hardware;

[0072] Example 3: Remote Impedance Adjustment in Satellite Communications

[0073] In satellite communications, the RF antenna of the ground station needs to maintain a stable signal connection with the remote satellite. As the satellite position changes or the external environment changes (such as temperature, air pressure, etc.), the impedance of the antenna may change slightly, resulting in increased loss of the transmitted signal.

[0074] Solution: The ground station’s RF system can detect the impedance mismatch between the antenna and the satellite link in real time, automatically activate the adjustable reactance element, and adjust the antenna’s impedance to match the new transmission conditions;

[0075] Result: The ground station always maintains the best signal transmission quality, reducing signal loss and power consumption;

[0076] In summary, by activating the preset adjustable reactance elements to dynamically adjust the impedance matching parameters of the RF antenna, the impedance mismatch problem caused by changes in external conditions or frequency band switching can be effectively solved, thereby improving signal transmission efficiency, reducing power loss, and ensuring the stability and efficiency of the communication system.

[0077] It should be added that the dynamically allocated subcarriers are applied to optimize the signal isolation of the RF antenna and increase the frequency interval between frequency band channels. The specific examples are as follows:

[0078] Example 1: Dynamic allocation of subcarriers in OFDM systems,

[0079] In a Wi-Fi network, OFDM technology is widely used, and each signal is allocated to multiple subcarriers for transmission. When certain frequency bands in the network are interfered by the use of other devices (such as microwave ovens and Bluetooth devices), the Wi-Fi system can monitor these interference sources in real time;

[0080] Solution: The system discovers that some subcarriers are in high-interference frequency bands through spectrum sensing, and dynamically adjusts the frequencies of these subcarriers to increase the frequency interval between them and the interference frequency bands, or allocates these subcarriers to frequency bands with less interference;

[0081] Result: The impact of interference sources is minimized, the Wi-Fi system maintains stable communication between multiple subcarriers, and the data transmission rate and quality are improved;

[0082] Example 2: Spectrum Isolation Optimization in Cellular Networks,

[0083] In 4G LTE or 5G communication systems, multiple users share the same frequency band. The system allocates resources by dynamically allocating subcarriers. If congestion or interference is detected in a user's frequency band, the system can improve signal isolation by adjusting the subcarrier allocation between users.

[0084] Solution: If the subcarrier frequency band occupied by a certain user is interfered with, the system can dynamically adjust and move part of the user's subcarriers to other frequency bands with less interference. At the same time, increase the frequency interval between the user and adjacent users to ensure that their signals do not interfere with each other.

[0085] Result: The overall channel utilization efficiency of the cellular network is optimized, and each user can enjoy more stable and efficient communication services;

[0086] Example 3: Signal isolation in a wireless microphone system,

[0087] Wireless microphone systems are often used in concerts or large-scale events, but due to the large number of electronic devices on site, frequency band congestion and signal interference often occur. If multiple wireless microphones work in adjacent frequency bands at the same time, interference will cause sound quality degradation or signal loss.

[0088] Solution: The system monitors the currently available frequency bands through spectrum sensing technology. When it detects that some frequency bands are congested, the system dynamically allocates the subcarriers of the wireless microphones and adjusts them to the frequency bands with less interference, while increasing the frequency interval between the frequency bands used by each microphone;

[0089] Result: The audio signal of each microphone can remain independent, avoiding frequency band congestion or signal interference from adjacent microphones, thus ensuring high-quality audio transmission;

[0090] In summary, by applying dynamically allocated subcarriers and increasing the frequency spacing between frequency band channels, the RF system can effectively improve signal isolation, reduce interference between adjacent channels, and optimize the use of spectrum resources in complex spectrum environments.

[0091] In this embodiment, before the step of activating a preset adjustable reactance element to dynamically adjust the impedance matching parameter of the RF antenna according to the working requirements of the RF antenna in different frequency bands, the method further includes:

[0092] S301: Based on a network analyzer preset for the radio frequency antenna, measuring scattering parameters at both ends of a matching network from an input end and an output end of the radio frequency antenna, and drawing corresponding input impedance curves and output impedance curves according to the scattering parameters;

[0093] S302: Determine whether the input impedance curve and the output impedance curve are within a preset target frequency range;

[0094] S303: If not, the transmission line characteristic parameters of the RF antenna are detected through both ends of the matching network, and the impedance discontinuity point of the RF antenna is identified according to the drawn impedance curve and the transmission line characteristic parameters, wherein the transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio.

[0095] In this embodiment, the system measures the scattering parameters of the two ends of the matching network from the input and output ends of the RF antenna based on the network analyzer pre-set for the RF antenna, draws the corresponding input impedance curve and output impedance curve according to different scattering parameters, and then the system determines whether the input impedance curve and the output impedance curve are within the preset target frequency range to execute the corresponding steps; for example, when the system determines that the input impedance curve and the output impedance curve are within the preset target frequency range, the system will consider that the impedance of the input and output ends of the RF antenna has been well matched. Impedance matching is the key to optimizing the transmission efficiency of RF signals and can minimize signal reflection and power loss. The system will continuously monitor the input and output impedance curves. The system will output an impedance curve, especially when the working environment may change (such as temperature, load, power supply voltage changes, etc.). If the system finds that the impedance curve deviates from the target frequency range, it needs to readjust the adjustable reactance element or other tuning components. At the same time, if the external conditions change, such as interference in the RF band or changes in load conditions, the system will trigger the adjustable reactance element and dynamically adjust the impedance matching parameters of the RF antenna to re-optimize the transmission performance. When switching to a new frequency band, the system will re-measure the scattering parameters according to the frequency band and adjust the impedance matching network to ensure good matching in the new frequency band. For example, when the system determines that the input impedance curve and the output impedance curve are not within the preset target frequency range, the system The system will consider the impedance matching of the input and output ends of the RF antenna to be abnormal. The system will detect the transmission line characteristic parameters of the RF antenna through the two ends of the matching network. The transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio. According to the drawn impedance curve and transmission line characteristic parameters, the impedance discontinuity of the RF antenna is identified; the system can accurately identify the specific location of the impedance mismatch, that is, the impedance discontinuity in the transmission line by analyzing the TDR signal (time domain reflection measurement), reflection coefficient and standing wave ratio. This is extremely important for locating faults or mismatches in the antenna system, allowing the system to quickly troubleshoot problems and take corrective measures. Because impedance mismatch can cause signal reflection and power loss, affecting communication quality, by identifying impedance discontinuity, the system The system can optimize the matching network in a targeted manner, reduce reflections, improve signal transmission efficiency, and ensure that more signal power is effectively transmitted to or received from the load end. Once the impedance discontinuity point is identified, the system can dynamically adjust the adjustable reactance element or tuning circuit to adjust the impedance matching network of the antenna in real time to restore the system's optimal transmission state. This automatic adjustment can greatly improve the system's adaptability under different working conditions and ensure stable communication performance. By eliminating impedance mismatch, the system can maximize the use of available frequency bands, reduce bandwidth waste, and improve signal transmission quality. Especially in high-frequency band applications (such as 5G communication systems or satellite communications), optimizing impedance matching plays an important role in improving bandwidth utilization and reducing bit error rates.

[0096] In this embodiment, the step S3 of collecting interference characteristics of the frequency band in real time and adaptively adjusting the frequency band parameters of the radio frequency antenna according to the interference characteristics further includes:

[0097] S31: acquiring drift data of the interference signal based on the frequency change of the interference signal, wherein the drift data specifically includes a drift amplitude and a drift speed;

[0098] S32: Determine whether the drift data meets the preset multipath interference;

[0099] S33: If so, identify the influencing factors of the multipath effect on different frequency bands, calculate the destructive efficiency of the multipath interference on signal transmission at a specific frequency based on the influencing factors, obtain the frequency selective fading corresponding to the multipath interference, and limit the modulation mode of the RF antenna based on the frequency selective fading, wherein the modulation mode specifically includes amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation.

[0100] In this embodiment, the system obtains drift data of the interference signal based on the frequency change of the interference signal, and the drift data specifically includes the drift amplitude and the drift speed. Then the system determines whether these drift data meet the pre-set multipath interference to execute the corresponding steps; for example, when the system determines that the drift data of the interference signal does not meet the pre-set multipath interference, the system will consider that the characteristics of the interference signal do not meet the known characteristics of the multipath interference, which may be caused by signal distortion, noise generated by other devices or problems within the system. The system will further analyze other characteristics of the interference signal (such as bandwidth, spectrum shape, time characteristics) to determine whether the interference signal is caused by other types of interference or abnormal It can analyze the common phenomena, including the modulation mode, power change and other information of the signal, dynamically adjust the interference detection and filter parameters, try to identify and filter out other possible interference sources, if the signal does not meet the multipath characteristics, adjust the filtering strategy for the specific interference source (such as narrowband filtering, noise suppression), and adopt the frequency band switching or channel isolation technology to switch the communication signal to the frequency band with less interference or increase the signal isolation to avoid the influence of interference; for example, when the system determines that the drift data of the interference signal can meet the pre-set multipath interference, the system will consider that the interference signal meets the known characteristics of multipath interference, the system will identify the influencing factors of the multipath effect on different frequency bands, and according to different influencing factors The system calculates the destructive efficiency of multipath interference on signal transmission at a specific frequency, obtains the frequency selective fading corresponding to the multipath interference, and limits the modulation mode of the RF antenna according to the frequency selective fading. The modulation modes specifically include amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation. By identifying the impact of multipath effects on different frequency bands, the system can specifically calculate the destructive efficiency of multipath interference on signal transmission at a specific frequency, so that the system can predict which frequency bands may suffer more serious interference, and thus take active measures to adjust signal transmission and reduce the damage of multipath effects to signals. At the same time, by obtaining the frequency selective fading corresponding to multipath interference, the system can select the most appropriate modulation mode according to the channel characteristics. For example, at frequencies with severe fading, more robust modulation methods such as frequency modulation (FM) or phase modulation (PM) can be selected to reduce the impact of fading on the signal. At relatively stable frequencies, more efficient modulation methods such as quadrature amplitude modulation (QAM) can be used to increase the data transmission rate. By dynamically adjusting the modulation method, the system can effectively reduce the damage of multipath interference to signal transmission, especially in the case of severe frequency selective fading. Adjusting the modulation method helps to reduce the bit error rate, thereby improving signal quality and transmission reliability. The modulation method that is more adapted to the channel conditions enables the signal to maintain its integrity better under harsh propagation conditions.

[0101] It should be noted that the factors affecting the multipath effect on different frequency bands are identified, and the destruction efficiency of the multipath interference on signal transmission at a specific frequency is calculated according to the factors. The specific examples are as follows:

[0102] Assume that a mobile communication system supports wireless communication in two frequency bands, 2.4 GHz and 5 GHz. The application scenario is a densely populated area of ​​high-rise buildings in a city. Due to reflection and obstruction from buildings, signals often reach the receiving end through multiple paths, resulting in multipath interference. The communication system uses spectrum monitoring equipment to analyze channel characteristics in real time and identify the impact of multipath effects on different frequency bands to optimize signal transmission.

[0103] 1. Identify the factors affecting multipath effects on different frequency bands,

[0104] In an urban environment, signals will encounter a large number of buildings, cars and other obstacles during propagation. These obstacles cause the signals to be reflected, refracted or diffracted multiple times. The system analyzes different frequency bands and obtains the following results:

[0105] 2.4 GHz band: The signal wavelength is about 12.5 cm. The longer wavelength makes the signal more easily diffracted when encountering obstacles. This diffraction effect makes the impact of multipath interference relatively weak. Because the phase difference of signals on different paths is small, coherent superposition will not cause significant signal attenuation. The system monitors that in the 2.4 GHz band, the interference of multipath effect on the signal is mainly manifested as slight amplitude changes, and the destruction efficiency is low;

[0106] 5 GHz band: The signal wavelength is about 6 cm. The shorter wavelength causes more reflections on the surface of buildings, and the diffraction effect is not as obvious as in the 2.4 GHz band. This leads to a large difference in the signal phases of different paths and a higher degree of mutual interference. The system detects that in this frequency band, multipath interference is more serious and frequency selective fading is very obvious, especially in areas with dense buildings. This fading effect causes a significant reduction in the signal strength of some frequency bands, and the destruction efficiency is high;

[0107] 2. Calculate the destructive efficiency of multipath interference on signal transmission,

[0108] The system establishes a channel model to quantify the impact of multipath interference on different frequency bands. Calculations show that:

[0109] In the 2.4 GHz frequency band, the path difference of the multipath effect is small, and the interference caused by phase offset is slight. The system calculates that under certain conditions, the destruction efficiency Only 10%, that is, multipath interference only slightly damages signal transmission;

[0110] In the 5 GHz frequency band, due to the large path differences and phase shifts, the signal coherence cancellation in some frequency intervals is obvious. The system found that the destruction efficiency of some specific frequency bands is as high as 50%, that is, the signal attenuation is very significant, resulting in a sharp decline in communication quality and a significant increase in bit error rate.

[0111] The destruction efficiency can be expressed by the following formula:

[0112] ;

[0113] in, is at frequency The interference power caused by the multipath effect is is the effective power of the signal. This ratio can be used to evaluate the degree of damage caused by multipath effect on signal transmission at a specific frequency.

[0114] 3. System response strategy,

[0115] After analyzing the impact of multipath effects on different frequency bands and the destruction efficiency, the system took a series of optimization measures. In the 5 GHz frequency band, the system found that some sub-bands suffered from severe frequency selective fading due to multipath interference. By analyzing the channel state information (CSI), the system identified the severely affected sub-bands and used frequency hopping technology to avoid these bands. The communication signal automatically switched to a band with less interference to ensure the transmission quality. The specific steps are as follows: the system detected that the destruction efficiency of the frequency band between 5.1 GHz and 5.2 GHz was 50%, and the interference was serious. According to the frequency hopping sequence, the system switched the signal transmission to the frequency band near 5.3 GHz. The destruction efficiency of this band was only 20%, and the interference was small. After frequency hopping, the signal strength was improved, the bit error rate was significantly reduced, and the communication returned to normal.

[0116] After analyzing the destruction efficiency of each frequency band, the system also optimized the signal modulation method: 2.4 GHz band: Due to the weak multipath effect, the system can choose an efficient modulation method, such as quadrature amplitude modulation (QAM). QAM can transmit more data bits in a wider bandwidth, effectively improving the communication rate; 5 GHz band: Due to the stronger multipath effect, some sub-bands suffer from severe fading. The system uses frequency modulation (FM) or phase modulation (PM) for these bands. These modulation methods are less dependent on signal amplitude and are more suitable for coping with multipath environments with frequency selective fading; the specific steps are as follows: In the 2.4 GHz band, the system uses 64-QAM modulation, which can transmit a higher data rate to meet the user's high bandwidth requirements. In the fading range of the 5 GHz band, the system switches to phase modulation (PM) to reduce the impact of the fading effect, ensure the complete transmission of the signal's phase information, and improve the stability of communication;

[0117] In summary, through frequency selective hopping and modulation mode adjustment, the system can effectively deal with multipath interference and ensure that the communication signal remains stable in a high-interference environment. At the same time, in frequency bands with less interference, the system selects a more efficient modulation method to increase the data rate and improve the spectrum utilization of the system. By optimizing the modulation method and using multipath synthesis technology, the system reduces the bit error rate caused by the multipath effect and enhances the reliability of signal transmission. Whether in an urban environment with dense high-rise buildings or in a complex indoor reflective environment, the system can improve communication performance and adapt to complex propagation environments by accurately identifying and optimizing multipath interference.

[0118] In this embodiment, before step S5 of controlling the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence, the method further includes:

[0119] S501: based on the preset main frequency band range of the radio frequency antenna, divide at least two sub-frequency bands, divide the preset radio frequency signal into sub-signals corresponding to the number of sub-frequency bands according to the spectrum management parameters of the sub-frequency bands, and adaptively adjust the transmission power of the sub-signals, wherein the spectrum management parameters specifically include bandwidth, interference conditions and data transmission requirements;

[0120] S502: Determine whether multiple sub-signals are detected in a single sub-frequency band;

[0121] S503: If so, apply the preset multi-carrier modulation technology to generate carrier signals with mutually orthogonal frequencies, modulate the sub-signals onto corresponding carriers respectively, enable the sub-signals to complete independent transmission through the sub-frequency bands, monitor the link quality of the sub-frequency bands in real time, and dynamically switch the RF antenna according to the link quality, wherein the link quality specifically includes signal-to-noise ratio and bit error rate.

[0122] In this embodiment, the system divides at least two sub-bands based on the main frequency band range preset by the RF antenna, and according to the spectrum management parameters of these sub-bands, the spectrum management parameters specifically include bandwidth, interference conditions and data transmission requirements, divides the preset RF signal into sub-signals corresponding to the number of sub-bands, adaptively adjusts the transmission power of the sub-signals, and then determines whether multiple sub-signals are detected in a single sub-band to execute corresponding steps; for example, when the system determines that multiple sub-signals are not detected in a single sub-band, the system will consider that the RF signal transmission environment in the sub-band is relatively clear, without spectrum congestion or other signal interference, which means that the current frequency If the sub-band has not been overused, the channel is clean, idle, and there is no interference signal from other devices, the system will maintain the current sub-band configuration, maintain the existing transmission power and spectrum allocation, and continue to communicate with the current spectrum management parameters to ensure the best transmission effect in a stable environment. At the same time, the transmission power of the signal in the sub-band is slightly increased adaptively to further improve the signal coverage and stability. Since there are no other interfering signals in the sub-band, increasing the power will not cause more interference, which helps to improve the communication quality. In addition, when the signal environment in the sub-band is relatively clean, the system can allocate more data traffic or higher priority tasks to the sub-band. In the process, spectrum resources are fully utilized, which can maximize spectrum utilization and avoid wasting idle frequency band resources. For example, when the system determines that multiple sub-signals are detected in a single sub-band, the system will consider that the sub-band is overused, and the system will apply the pre-set multi-carrier modulation technology to generate carrier signals with mutually orthogonal frequencies, modulate the sub-signals to the corresponding carriers, so that the sub-signals can be independently transmitted through the sub-bands, and the link quality of the sub-bands can be monitored in real time. The link quality specifically includes the signal-to-noise ratio and the bit error rate, and the RF antennas can be dynamically switched according to different link qualities. The system generates multiple carrier signals with orthogonal frequencies, and modulates each sub-signal to an independent carrier. This ensures that even though multiple sub-signals are transmitted in the same sub-frequency band, they will not interfere with each other. At the same time, each sub-signal is assigned to an independent orthogonal carrier, which can avoid multiple sub-signals directly competing for the same frequency resource, ensuring that each signal can be transmitted smoothly, ensuring the independence of signal transmission, reducing congestion and interference, and by continuously monitoring SNR and BER, the system can determine whether the quality of the current link meets the standard. If the link quality deteriorates (for example, the signal-to-noise ratio becomes lower or the bit error rate increases), the system can dynamically switch the working frequency band of the RF antenna according to the link situation, which can ensure that the system maintains stable communication performance under different conditions.

[0123] It should be noted that a preset multi-carrier modulation technology is applied to generate carrier signals with mutually orthogonal frequencies, and the sub-signals are modulated onto corresponding carriers respectively, so that the sub-signals are independently transmitted through the sub-frequency bands, and the link quality of the sub-frequency bands is monitored in real time, and the RF antenna is dynamically switched according to the link quality. Specific examples are as follows:

[0124] Assume that a communication system detects sub-signals of three different devices transmitting simultaneously in a 20 MHz sub-band of the 5 GHz band. When the system determines that the signals in the sub-band are dense, it will enable multi-carrier modulation (e.g. OFDM) technology;

[0125] The system generates three frequency orthogonal carrier signals and modulates the three sub-signals onto different carriers. Each sub-signal is transmitted on an independent carrier to avoid frequency overlap and interference between each other. During the transmission process, the system monitors the link quality of the sub-frequency band in real time.

[0126] If the signal-to-noise ratio of one of the sub-signals drops to a critical value, the system may improve the transmission quality by adjusting the transmission power of the signal or switching to a sub-band with less interference; if the bit error rate of a sub-band suddenly increases, the system will modulate the signal to other frequency bands or use frequency hopping technology to ensure the stability of communication quality;

[0127] In summary, through multi-carrier modulation technology, the system can ensure that each sub-signal is transmitted independently even if there are multiple sub-signals in a single sub-frequency band, thus avoiding mutual interference of signals. At the same time, the system monitors the link quality in real time and dynamically adjusts the RF antenna according to changes in the signal-to-noise ratio and bit error rate, ensuring stability and reliability during communication. The orthogonal characteristics of multi-carriers reduce co-channel interference, and the impact of external interference on the signal is further reduced through dynamic switching and modulation adjustment.

[0128] In this embodiment, the step S5 of controlling the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence includes:

[0129] S51: Based on a pre-drawn spectrum interference distribution map, identifying a frequency band interval state from the spectrum interference distribution map, wherein the frequency band interval state specifically includes an interference-free frequency band and a severely interfered frequency band;

[0130] S52: Determine whether the frequency band interval state meets the preset frequency hopping condition;

[0131] S53: If so, select a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate from the frequency band interval status, dynamically adjust the operating frequencies of the preset transmitter and the preset receiver according to the frequency band interval status, control the RF antenna to switch to the frequency band to be hopped, activate the preset frequency hopping control signal of the RF antenna during the frequency hopping process, and maintain a continuous data link of the RF antenna.

[0132] In this embodiment, the system identifies the frequency band interval status from the pre-drawn spectrum interference distribution maps, and the frequency band interval status specifically includes interference-free frequency bands and interference-severe frequency bands. The system then determines whether these frequency band interval statuses meet the pre-set frequency hopping conditions to execute corresponding steps; for example, when the system determines that the frequency band interval status cannot meet the pre-set frequency hopping conditions, the system will believe that there is no sufficiently obvious interference or frequency band congestion in the current spectrum environment, and the use of spectrum resources is still within an acceptable range. The system will continue to communicate in the current frequency band without the need for frequency switching, because although there is a certain degree of interference in the current frequency band, the interference is not Even if the interference is serious, the normal transmission and reception of signals can still be maintained. At the same time, the spectrum status should be continuously monitored to cope with possible changes in spectrum interference. If the interference situation worsens and the frequency band interval status changes, it can be timely determined whether frequency hopping is needed, and sub-band resources can be reallocated according to the channel load of the current frequency band, such as transferring some communication tasks to sub-bands with less interference to reduce the impact of interference on major communication tasks; for example, when the system determines that the frequency band interval status can meet the pre-set frequency hopping conditions, the system will consider that there is obvious interference and frequency band congestion in the current spectrum environment, and the system will select a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate from the frequency band interval status, and dynamically allocate the frequency band resources according to the frequency band interval status. Adjust the preset operating frequencies of the transmitter and receiver, control the RF antenna to the frequency band to be hopped, activate the pre-set frequency hopping control signal of the RF antenna during the frequency hopping process, and maintain the continuous data link of the RF antenna; the system selects the frequency band to be hopped with a higher signal-to-noise ratio (SNR) and a lower bit error rate (BER) in the frequency band with severe congestion and interference, effectively improving the signal transmission quality, which means that the system can communicate on a better spectrum and reduce the negative impact of signal attenuation and interference. The frequency band with a low bit error rate can ensure that the probability of data errors during transmission is small, thereby reducing the loss or retransmission of data packets, improving the efficiency and stability of the communication link, especially maintaining reliability in a high-interference environment. Reliable transmission, and flexibly adjust the operating frequencies of the transmitter and receiver according to the frequency band interval status detected in real time to adapt to changes in the spectrum. This dynamic adjustment avoids the system from sticking to the frequency band with serious interference, maintains the flexibility and adaptability of the communication system, and ensures the continuity of the communication link during frequency switching by activating the preset frequency hopping control signal, which means that even if the system switches to a new frequency band, data transmission is still not interrupted, avoiding link interruption and data loss that may occur during the frequency hopping process. Since the system can maintain the continuity of the data link during frequency hopping, the delay in the data transmission process is minimized, which helps to improve the response speed of real-time communication, especially in scenarios that require high real-time and high reliability.

[0133] In this embodiment, the step S2 of determining whether the signal feature matches a preset interference source further includes:

[0134] S21: Acquire the intensity distribution and frequency range of the interference signal based on the power spectrum density of the radio frequency antenna;

[0135] S22: Determine whether the intensity distribution and the frequency range meet the interference source characteristics;

[0136] S23: If yes, the communication signal is collected simultaneously through the preset receiving point of the radio frequency antenna, the arrival angle and propagation path of the interference signal are identified, and the spatial distribution information of the interference signal in the frequency band is generated.

[0137] In this embodiment, the system obtains the intensity distribution and frequency range of the interference signal based on the power spectral density of the RF antenna, and then the system determines whether these intensity distribution and frequency range meet the characteristics of the interference source to execute the corresponding steps; for example, when the system determines that the intensity distribution and frequency range of the interference signal cannot meet the characteristics of the interference source, the system will consider that the intensity distribution and frequency range of the current interference signal do not meet the characteristics of the known interference source in the system, indicating that the signal is a newly emerged interference, or an uncommon and dynamically changing interference in the environment. The system will collect more interference signal feature data, such as the signal's phase offset, delay, and modulation method, to help identify the specific characteristics of the signal. The system can dynamically adjust the signal shielding or filtering function of the RF antenna according to the analyzed signal characteristics, selectively suppress the interference signal, and adjust the transmission power of the RF antenna according to the intensity distribution of the interference signal. If the interference signal intensity is high, the system can reduce the transmission power to avoid excessive energy concentration in the interference frequency band and reduce the collision with the interference signal. For broadband interference signals, the system can optimize the power spectrum density, allocate the transmission power in different frequency bands, reduce the impact of the interference signal in the spectrum, and enhance the signal isolation. For example, when the system determines that the intensity distribution and frequency range of the interference signal meet the requirements of the interference source, characteristics, the system will consider the signal to be a known interference signal, and will simultaneously collect communication signals through the preset receiving points of the RF antenna, identify the arrival angle and propagation path of the interference signal, and generate spatial distribution information of the interference signal in the frequency band; by identifying the arrival angle and propagation path of the interference signal, the system can accurately locate the position of the interference source, which helps to take targeted interference suppression measures, such as adjusting the antenna direction, using beamforming technology, etc., so as to reduce the impact of the interference source and generate spatial distribution information of the interference signal in the frequency band, which can help the system to more clearly understand the propagation path and influence range of the interference signal in the environment, and enhance the system's perception of the interference environment. At the same time, by accurately identifying the arrival angle of the interference signal, the system can optimize the radiation pattern of the antenna array and focus the beam of the communication signal to a specific direction, thereby avoiding the interference signal in space. This can greatly reduce the impact of the interference signal on the system communication quality, while improving the signal quality and stability of the communication link. By understanding the propagation path of the interference signal, the system can dynamically adjust the frequency band usage strategy to reduce the occupancy of the frequency band covered by the interference signal. According to the spatial distribution of the interference signal and the frequency band influence range, the system can manage frequency resources more efficiently, dynamically allocate the frequency band for signal transmission, minimize the interference of the interference source, and ensure the efficient use of spectrum resources.

[0138] In this embodiment, the spectrum monitoring instrument preset based on the radio frequency antenna collects interference signals between different frequency bands, and the step S1 of identifying corresponding signal features from the interference signals further includes:

[0139] S11: Based on the preset bit error rate threshold of each frequency band, collecting the bit error rate baseline value of the radio frequency antenna under normal communication;

[0140] S12: Determine whether the bit error rate baseline value exceeds the bit error rate threshold;

[0141] S13: If yes, monitor the fluctuation duration of the bit error rate baseline value, and obtain the change form of the interference signal according to the fluctuation duration, wherein the change form specifically includes instantaneous change and trend increase.

[0142] In this embodiment, the system collects the bit error rate baseline value under normal communication of the RF antenna based on the pre-set bit error rate threshold of each frequency band, and then the system determines whether the bit error rate baseline value exceeds the bit error rate threshold to execute the corresponding steps; for example, when the system determines that the bit error rate baseline value under normal communication of the RF antenna does not exceed the bit error rate threshold, the system will consider that the current communication quality is stable and the bit error rate is within the range allowed by the system. The system will maintain the existing RF antenna transmission power and does not need to adjust the antenna gain or reduce the transmission power because the signal transmission quality is sufficiently stable. At the same time, the system continues to monitor the change of the bit error rate, especially in a dynamic environment, to ensure that the bit error rate does not suddenly increase and the communication quality does not deteriorate. In addition to the bit error rate, the system should continue to monitor other related parameters such as the signal-to-noise ratio to further confirm the stability and security of the communication link. If the signal-to-noise ratio is in a higher range, it means that the interference and noise are low and the communication quality is good. In addition, according to the current stable communication situation, the allocation of spectrum resources is optimized. Since the communication quality of this frequency band is good, the system can accommodate more communication tasks on the same frequency band, reasonably allocate bandwidth resources, and enhance communication efficiency. For example, when the system determines that the signal-to-noise ratio is within a higher range, the system can further monitor the signal-to-noise ratio to ensure that the signal-to-noise ratio is within a higher range, which indicates that the interference and noise are low and the communication quality is good. In addition, according to the current stable communication situation, the allocation of spectrum resources is optimized. Since the communication quality of this frequency band is good, the system can accommodate more communication tasks on the same frequency band, reasonably allocate bandwidth resources, and enhance communication efficiency. When the bit error rate baseline value under normal communication of the frequency antenna exceeds the bit error rate threshold, the system will consider that the current communication quality is unstable and the bit error rate has exceeded the allowable range. The system will monitor the fluctuation duration of the bit error rate baseline value and obtain the change form of the interference signal according to different fluctuation durations. The change form specifically includes instantaneous change and trend increase. By identifying the instantaneous change of the bit error rate, the system can quickly locate the instantaneous interference source. For example, a short electromagnetic pulse or environmental noise change can cause a sudden increase in the bit error rate. By capturing these instantaneous changes, the system can quickly take temporary measures (such as temporarily increasing power and switching frequency bands) to stabilize communication. At the same time, by analyzing the duration and change form of the bit error rate fluctuation, the system can adaptively adjust the working parameters of the RF antenna. For example, when a trend of bit error rate increase is detected, the system can plan frequency hopping in advance to avoid communication interruption. In addition, the system can also adjust the frequency range or transmission power of the antenna based on the fluctuation type to combat different types of interference sources. By detecting the instantaneous increase or trend change of the bit error rate, the system can take measures in the initial interference stage to prevent the bit error rate from reaching an excessively high level, thereby improving the reliability of the overall communication link.

[0143] Reference Figure 2 , is a multi-band RF antenna adaptive tuning system in one embodiment of the present invention, comprising:

[0144] The acquisition module 10 is used to collect interference signals between different frequency bands based on the spectrum monitoring instrument preset by the radio frequency antenna, and identify corresponding signal features from the interference signals, wherein the signal features specifically include frequency offset and waveform;

[0145] A judging module 20, configured to judge whether the signal characteristics match a preset interference source;

[0146] An execution module 30 is used to, if yes, activate a preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna according to the working requirements of the RF antenna in different frequency bands, collect interference characteristics of the frequency band in real time, and adaptively adjust the frequency band parameters of the RF antenna according to the interference characteristics, wherein the interference characteristics specifically include time characteristics, space characteristics and channel characteristics, and the frequency band parameters specifically include frequency band range, frequency resolution and frequency step;

[0147] A second determination module 40 is used to determine whether the frequency band parameters detect a preset spectrum congestion;

[0148] The second execution module 50 is used to control the RF antenna to perform frequency hopping communication based on a preset frequency hopping sequence if detected, and to optimize the signal isolation of the RF antenna by applying dynamically allocated subcarriers according to the real-time spectrum sensing information of the RF antenna, and to increase the frequency interval between frequency band channels, wherein the spectrum sensing information specifically includes signal strength, frequency band occupancy and signal utilization.

[0149] In this embodiment, the acquisition module 10 collects interference signals between different frequency bands based on the spectrum monitoring instrument pre-installed in the radio frequency antenna, identifies corresponding signal characteristics from these interference signals, and the signal characteristics specifically include frequency offset and waveform, and then the judgment module 20 judges whether these signal characteristics match the pre-set interference source to execute the corresponding steps; for example, when the system determines that the signal characteristics of the interference signal do not match the pre-set interference source, the system will consider that the unmatched interference signal may be sporadic or instantaneous interference, which may come from environmental factors, short-term electronic equipment interference or instantaneous misalignment of the communication system. This type of interference is not a fixed known interference source, and the system will perform short-term spectrum monitoring to record the interference signal. duration and frequency of occurrence. If the interference frequency is low or the duration is short, it can be judged as sporadic interference and no long-term countermeasures are required. However, if the interference continues to occur, the system needs to start an automatic interference shielding program or adjust the frequency band to avoid sporadic interference affecting communications. At the same time, the identification range of the interference source is expanded, and feature extraction and comparison in more dimensions are performed to identify possible changes in the interference source, and the misjudgment of environmental noise or non-interference signals is eliminated by combining the time characteristics and intensity of the signal; for example, when the system determines that the signal characteristics of the interference signal can match the pre-set interference source, the execution module 30 will consider that the interference belongs to a known fixed interference source, and the system will be based on the working requirements of the RF antenna in different frequency bands. , activate the preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna, collect the interference characteristics of the frequency band in real time, the interference characteristics specifically include time characteristics, space characteristics and channel characteristics, and adaptively adjust the frequency band parameters of the RF antenna according to different interference characteristics. The frequency band parameters specifically include frequency band range, frequency resolution and frequency step; the system quickly identifies and determines whether the interference signal matches the preset interference source, so as to take corresponding interference suppression measures with a faster response speed. Matching the known interference source can specifically activate the adjustable reactance element to adjust the impedance matching parameters of the antenna, reduce signal reflection and interference effects, and improve anti-interference performance and communication stability. At the same time, according to the interference characteristics collected in real time, the system The system can adaptively adjust the frequency band range, frequency resolution and frequency step of the RF antenna, so that the antenna always works in the best communication frequency band and avoids the frequency area with serious interference. This adaptive adjustment mechanism ensures the frequency band utilization efficiency of the antenna in an interference environment and maintains high-quality signal transmission. In addition, since the system can collect interference characteristics in real time and adaptively adjust frequency band parameters, it has a strong ability to deal with interference in real time. Even if the characteristics of the interference signal change, the system can respond quickly to ensure that the communication quality is not affected by the interference change, thereby enhancing the robustness and stability of the system. Then the second judgment module 40 judges whether the frequency band parameters of the RF antenna detect a preset spectrum congestion to execute the corresponding steps.For example, when the system determines that the frequency band parameters of the RF antenna do not detect spectrum congestion, the system will consider that the frequency band is not overused in the current environment, the signal propagation environment is good, and there is less interference. The system will maintain the existing frequency band working state and continue to communicate in the current frequency band. By continuously monitoring the frequency band status, it ensures regular collection and analysis of the spectrum to prevent subsequent interference or congestion. At the same time, it continues to maintain the existing frequency band and signal transmission strategy, which can appropriately reduce the power consumption of the system and further improve energy efficiency by optimizing transmission power or bandwidth usage. At the same time, it maintains monitoring of signal quality to prevent subsequent possible interference and maintains the current frequency band parameters. There is no need to perform frequency hopping or bandwidth adjustment operations. In this case, the frequency band resource allocation can be regularly optimized to ensure that timely adjustments can be made when possible spectrum demand changes in the future, and the frequency band occupancy continues to be dynamically monitored. For example, when the system determines that the frequency band parameters of the RF antenna detect spectrum congestion, the second execution module 50 will consider that the communication environment is overused, and the system will perform a predetermined operation based on the preset frequency band. The frequency hopping sequence controls the RF antenna to perform frequency hopping communication. According to the real-time spectrum sensing information of the frequency hopping antenna, the spectrum sensing information specifically includes signal strength, frequency band occupancy rate and signal utilization rate. The dynamically allocated subcarrier is applied to optimize the signal isolation of the RF antenna and increase the frequency interval between frequency band signals. The system quickly switches to the frequency band with less interference or unoccupied through the preset frequency hopping sequence, avoiding signal conflicts in congested frequency bands. This frequency hopping mechanism ensures communication stability, reduces data transmission delay and bit error rate, and thus improves overall communication efficiency. At the same time, through real-time spectrum sensing information, the system can dynamically adjust the allocation of subcarriers and reasonably utilize spectrum resources in different frequency bands. This optimized utilization of spectrum resources avoids the waste of frequency bands, ensures the maximum transmission efficiency on multiple frequency bands, and improves spectrum utilization. In addition, by dynamically adjusting the subcarriers and increasing the frequency interval between frequency band signals, mutual interference between frequency bands can be effectively reduced, which can improve the signal isolation of different frequency bands, avoid interference between adjacent frequency bands, and ensure the signal transmission quality on each frequency band. ;

[0150] In this embodiment, it also includes:

[0151] A measurement module, configured to measure scattering parameters at both ends of a matching network from an input end and an output end of the RF antenna based on a network analyzer preset for the RF antenna, and to draw corresponding input impedance curves and output impedance curves according to the scattering parameters;

[0152] A third judgment module is used to judge whether the input impedance curve and the output impedance curve are within a preset target frequency range;

[0153] The third execution module is used to detect the transmission line characteristic parameters of the RF antenna through the two ends of the matching network, and identify the impedance discontinuity point of the RF antenna according to the drawn impedance curve and the transmission line characteristic parameters, wherein the transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio.

[0154] In this embodiment, the system measures the scattering parameters of the two ends of the matching network from the input and output ends of the RF antenna based on the network analyzer pre-set for the RF antenna, draws the corresponding input impedance curve and output impedance curve according to different scattering parameters, and then the system determines whether the input impedance curve and the output impedance curve are within the preset target frequency range to execute the corresponding steps; for example, when the system determines that the input impedance curve and the output impedance curve are within the preset target frequency range, the system will consider that the impedance of the input and output ends of the RF antenna has been well matched. Impedance matching is the key to optimizing the transmission efficiency of RF signals and can minimize signal reflection and power loss. The system will continuously monitor the input and output impedance curves. The system will output an impedance curve, especially when the working environment may change (such as temperature, load, power supply voltage changes, etc.). If the system finds that the impedance curve deviates from the target frequency range, it needs to readjust the adjustable reactance element or other tuning components. At the same time, if the external conditions change, such as interference in the RF band or changes in load conditions, the system will trigger the adjustable reactance element and dynamically adjust the impedance matching parameters of the RF antenna to re-optimize the transmission performance. When switching to a new frequency band, the system will re-measure the scattering parameters according to the frequency band and adjust the impedance matching network to ensure good matching in the new frequency band. For example, when the system determines that the input impedance curve and the output impedance curve are not within the preset target frequency range, the system The system will consider the impedance matching of the input and output ends of the RF antenna to be abnormal. The system will detect the transmission line characteristic parameters of the RF antenna through the two ends of the matching network. The transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio. According to the drawn impedance curve and transmission line characteristic parameters, the impedance discontinuity of the RF antenna is identified; the system can accurately identify the specific location of the impedance mismatch, that is, the impedance discontinuity in the transmission line by analyzing the TDR signal (time domain reflection measurement), reflection coefficient and standing wave ratio. This is extremely important for locating faults or mismatches in the antenna system, allowing the system to quickly troubleshoot problems and take corrective measures. Because impedance mismatch can cause signal reflection and power loss, affecting communication quality, by identifying impedance discontinuity, the system The system can optimize the matching network in a targeted manner, reduce reflections, improve signal transmission efficiency, and ensure that more signal power is effectively transmitted to or received from the load end. Once the impedance discontinuity point is identified, the system can dynamically adjust the adjustable reactance element or tuning circuit to adjust the impedance matching network of the antenna in real time to restore the system's optimal transmission state. This automatic adjustment can greatly improve the system's adaptability under different working conditions and ensure stable communication performance. By eliminating impedance mismatch, the system can maximize the use of available frequency bands, reduce bandwidth waste, and improve signal transmission quality. Especially in high-frequency band applications (such as 5G communication systems or satellite communications), optimizing impedance matching plays an important role in improving bandwidth utilization and reducing bit error rates.

[0155] In this embodiment, the execution module further includes:

[0156] An acquiring unit, configured to acquire drift data of the interference signal based on a frequency change of the interference signal, wherein the drift data specifically includes a drift amplitude and a drift speed;

[0157] A judging unit, used to judge whether the drift data meets the preset multipath interference;

[0158] An execution unit is used to, if yes, identify the impact of the multipath effect on different frequency bands, calculate the destructive efficiency of the multipath interference on signal transmission at a specific frequency according to the impact, obtain the frequency selective fading corresponding to the multipath interference, and limit the modulation mode of the RF antenna according to the frequency selective fading, wherein the modulation mode specifically includes amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation.

[0159] In this embodiment, the system obtains drift data of the interference signal based on the frequency change of the interference signal, and the drift data specifically includes the drift amplitude and the drift speed. Then the system determines whether these drift data meet the pre-set multipath interference to execute the corresponding steps; for example, when the system determines that the drift data of the interference signal does not meet the pre-set multipath interference, the system will consider that the characteristics of the interference signal do not meet the known characteristics of the multipath interference, which may be caused by signal distortion, noise generated by other devices or problems within the system. The system will further analyze other characteristics of the interference signal (such as bandwidth, spectrum shape, time characteristics) to determine whether the interference signal is caused by other types of interference or abnormal It can analyze the common phenomena, including the modulation mode, power change and other information of the signal, dynamically adjust the interference detection and filter parameters, try to identify and filter out other possible interference sources, if the signal does not meet the multipath characteristics, adjust the filtering strategy for the specific interference source (such as narrowband filtering, noise suppression), and adopt the frequency band switching or channel isolation technology to switch the communication signal to the frequency band with less interference or increase the signal isolation to avoid the influence of interference; for example, when the system determines that the drift data of the interference signal can meet the pre-set multipath interference, the system will consider that the interference signal meets the known characteristics of multipath interference, the system will identify the influencing factors of the multipath effect on different frequency bands, and according to different influencing factors The system calculates the destructive efficiency of multipath interference on signal transmission at a specific frequency, obtains the frequency selective fading corresponding to the multipath interference, and limits the modulation mode of the RF antenna according to the frequency selective fading. The modulation modes specifically include amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation. By identifying the impact of multipath effects on different frequency bands, the system can specifically calculate the destructive efficiency of multipath interference on signal transmission at a specific frequency, so that the system can predict which frequency bands may suffer more serious interference, and thus take active measures to adjust signal transmission and reduce the damage of multipath effects to signals. At the same time, by obtaining the frequency selective fading corresponding to multipath interference, the system can select the most appropriate modulation mode according to the channel characteristics. For example, at frequencies with severe fading, more robust modulation methods such as frequency modulation (FM) or phase modulation (PM) can be selected to reduce the impact of fading on the signal. At relatively stable frequencies, more efficient modulation methods such as quadrature amplitude modulation (QAM) can be used to increase the data transmission rate. By dynamically adjusting the modulation method, the system can effectively reduce the damage of multipath interference to signal transmission, especially in the case of severe frequency selective fading. Adjusting the modulation method helps to reduce the bit error rate, thereby improving signal quality and transmission reliability. The modulation method that is more adapted to the channel conditions enables the signal to maintain its integrity better under harsh propagation conditions.

[0160] In this embodiment, it also includes:

[0161] A division module, used to divide the preset main frequency band range of the radio frequency antenna into at least two sub-frequency bands, divide the preset radio frequency signal into sub-signals corresponding to the number of sub-frequency bands according to the spectrum management parameters of the sub-frequency bands, and adaptively adjust the transmission power of the sub-signals, wherein the spectrum management parameters specifically include bandwidth, interference conditions and data transmission requirements;

[0162] A fourth determination module, used to determine whether multiple sub-signals are detected in a single sub-frequency band;

[0163] The fourth execution module is used to apply a preset multi-carrier modulation technology to generate carrier signals with mutually orthogonal frequencies, modulate the sub-signals onto corresponding carriers respectively, enable the sub-signals to complete independent transmission through the sub-frequency bands, monitor the link quality of the sub-frequency bands in real time, and dynamically switch the RF antenna according to the link quality, wherein the link quality specifically includes signal-to-noise ratio and bit error rate.

[0164] In this embodiment, the system divides at least two sub-bands based on the main frequency band range preset by the RF antenna, and according to the spectrum management parameters of these sub-bands, the spectrum management parameters specifically include bandwidth, interference conditions and data transmission requirements, divides the preset RF signal into sub-signals corresponding to the number of sub-bands, adaptively adjusts the transmission power of the sub-signals, and then determines whether multiple sub-signals are detected in a single sub-band to execute corresponding steps; for example, when the system determines that multiple sub-signals are not detected in a single sub-band, the system will consider that the RF signal transmission environment in the sub-band is relatively clear, without spectrum congestion or other signal interference, which means that the current frequency If the sub-band has not been overused, the channel is clean, idle, and there is no interference signal from other devices, the system will maintain the current sub-band configuration, maintain the existing transmission power and spectrum allocation, and continue to communicate with the current spectrum management parameters to ensure the best transmission effect in a stable environment. At the same time, the transmission power of the signal in the sub-band is slightly increased adaptively to further improve the signal coverage and stability. Since there are no other interfering signals in the sub-band, increasing the power will not cause more interference, which helps to improve the communication quality. In addition, when the signal environment in the sub-band is relatively clean, the system can allocate more data traffic or higher priority tasks to the sub-band. In the process, spectrum resources are fully utilized, which can maximize spectrum utilization and avoid wasting idle frequency band resources. For example, when the system determines that multiple sub-signals are detected in a single sub-band, the system will consider that the sub-band is overused, and the system will apply the pre-set multi-carrier modulation technology to generate carrier signals with mutually orthogonal frequencies, modulate the sub-signals to the corresponding carriers, so that the sub-signals can be independently transmitted through the sub-bands, and the link quality of the sub-bands can be monitored in real time. The link quality specifically includes the signal-to-noise ratio and the bit error rate, and the RF antennas can be dynamically switched according to different link qualities. The system generates multiple carrier signals with orthogonal frequencies, and modulates each sub-signal to an independent carrier. This ensures that even though multiple sub-signals are transmitted in the same sub-frequency band, they will not interfere with each other. At the same time, each sub-signal is assigned to an independent orthogonal carrier, which can avoid multiple sub-signals directly competing for the same frequency resource, ensuring that each signal can be transmitted smoothly, ensuring the independence of signal transmission, reducing congestion and interference, and by continuously monitoring SNR and BER, the system can determine whether the quality of the current link meets the standard. If the link quality deteriorates (for example, the signal-to-noise ratio becomes lower or the bit error rate increases), the system can dynamically switch the working frequency band of the RF antenna according to the link situation, which can ensure that the system maintains stable communication performance under different conditions.

[0165] In this embodiment, the execution module further includes:

[0166] an identification unit, configured to identify a frequency band interval state from a pre-drawn spectrum interference distribution map based on the spectrum interference distribution map, wherein the frequency band interval state specifically includes an interference-free frequency band and a severely interfered frequency band;

[0167] A second judgment unit, used to judge whether the frequency band interval state reaches a preset frequency hopping condition;

[0168] The second execution unit is used to select a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate from the frequency band interval state, dynamically adjust the operating frequencies of the preset transmitter and the preset receiver according to the frequency band interval state, control the RF antenna to switch to the frequency band to be hopped, activate the preset frequency hopping control signal of the RF antenna during the frequency hopping process, and maintain a continuous data link of the RF antenna.

[0169] In this embodiment, the system identifies the frequency band interval status from the pre-drawn spectrum interference distribution maps, and the frequency band interval status specifically includes interference-free frequency bands and interference-severe frequency bands. The system then determines whether these frequency band interval statuses meet the pre-set frequency hopping conditions to execute corresponding steps; for example, when the system determines that the frequency band interval status cannot meet the pre-set frequency hopping conditions, the system will believe that there is no sufficiently obvious interference or frequency band congestion in the current spectrum environment, and the use of spectrum resources is still within an acceptable range. The system will continue to communicate in the current frequency band without the need for frequency switching, because although there is a certain degree of interference in the current frequency band, the interference is not Even if the interference is serious, the normal transmission and reception of signals can still be maintained. At the same time, the spectrum status should be continuously monitored to cope with possible changes in spectrum interference. If the interference situation worsens and the frequency band interval status changes, it can be timely determined whether frequency hopping is needed, and sub-band resources can be reallocated according to the channel load of the current frequency band, such as transferring some communication tasks to sub-bands with less interference to reduce the impact of interference on major communication tasks; for example, when the system determines that the frequency band interval status can meet the pre-set frequency hopping conditions, the system will consider that there is obvious interference and frequency band congestion in the current spectrum environment, and the system will select a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate from the frequency band interval status, and dynamically allocate the frequency band resources according to the frequency band interval status. Adjust the preset operating frequencies of the transmitter and receiver, control the RF antenna to the frequency band to be hopped, activate the pre-set frequency hopping control signal of the RF antenna during the frequency hopping process, and maintain the continuous data link of the RF antenna; the system selects the frequency band to be hopped with a higher signal-to-noise ratio (SNR) and a lower bit error rate (BER) in the frequency band with severe congestion and interference, effectively improving the signal transmission quality, which means that the system can communicate on a better spectrum and reduce the negative impact of signal attenuation and interference. The frequency band with a low bit error rate can ensure that the probability of data errors during transmission is small, thereby reducing the loss or retransmission of data packets, improving the efficiency and stability of the communication link, especially maintaining reliability in a high-interference environment. Reliable transmission, and flexibly adjust the operating frequencies of the transmitter and receiver according to the frequency band interval status detected in real time to adapt to changes in the spectrum. This dynamic adjustment avoids the system from sticking to the frequency band with serious interference, maintains the flexibility and adaptability of the communication system, and ensures the continuity of the communication link during frequency switching by activating the preset frequency hopping control signal, which means that even if the system switches to a new frequency band, data transmission is still not interrupted, avoiding link interruption and data loss that may occur during the frequency hopping process. Since the system can maintain the continuity of the data link during frequency hopping, the delay in the data transmission process is minimized, which helps to improve the response speed of real-time communication, especially in scenarios that require high real-time and high reliability.

[0170] In this embodiment, the judgment module further includes:

[0171] An acquisition unit, configured to acquire the intensity distribution and frequency range of the interference signal based on the power spectrum density of the radio frequency antenna;

[0172] A third judging unit, used to judge whether the intensity distribution and the frequency range meet the interference source characteristics;

[0173] The third execution unit is used to simultaneously collect communication signals through the preset receiving points of the RF antenna, identify the arrival angle and propagation path of the interference signal, and generate spatial distribution information of the interference signal in the frequency band.

[0174] In this embodiment, the system obtains the intensity distribution and frequency range of the interference signal based on the power spectral density of the RF antenna, and then the system determines whether these intensity distribution and frequency range meet the characteristics of the interference source to execute the corresponding steps; for example, when the system determines that the intensity distribution and frequency range of the interference signal cannot meet the characteristics of the interference source, the system will consider that the intensity distribution and frequency range of the current interference signal do not meet the characteristics of the known interference source in the system, indicating that the signal is a newly emerged interference, or an uncommon and dynamically changing interference in the environment. The system will collect more interference signal feature data, such as the signal's phase offset, delay, and modulation method, to help identify the specific characteristics of the signal. The system can dynamically adjust the signal shielding or filtering function of the RF antenna according to the analyzed signal characteristics, selectively suppress the interference signal, and adjust the transmission power of the RF antenna according to the intensity distribution of the interference signal. If the interference signal intensity is high, the system can reduce the transmission power to avoid excessive energy concentration in the interference frequency band and reduce the collision with the interference signal. For broadband interference signals, the system can optimize the power spectrum density, allocate the transmission power in different frequency bands, reduce the impact of the interference signal in the spectrum, and enhance the signal isolation. For example, when the system determines that the intensity distribution and frequency range of the interference signal meet the requirements of the interference source, characteristics, the system will consider the signal to be a known interference signal, and will simultaneously collect communication signals through the preset receiving points of the RF antenna, identify the arrival angle and propagation path of the interference signal, and generate spatial distribution information of the interference signal in the frequency band; by identifying the arrival angle and propagation path of the interference signal, the system can accurately locate the position of the interference source, which helps to take targeted interference suppression measures, such as adjusting the antenna direction, using beamforming technology, etc., so as to reduce the impact of the interference source and generate spatial distribution information of the interference signal in the frequency band, which can help the system to more clearly understand the propagation path and influence range of the interference signal in the environment, and enhance the system's perception of the interference environment. At the same time, by accurately identifying the arrival angle of the interference signal, the system can optimize the radiation pattern of the antenna array and focus the beam of the communication signal to a specific direction, thereby avoiding the interference signal in space. This can greatly reduce the impact of the interference signal on the system communication quality, while improving the signal quality and stability of the communication link. By understanding the propagation path of the interference signal, the system can dynamically adjust the frequency band usage strategy to reduce the occupancy of the frequency band covered by the interference signal. According to the spatial distribution of the interference signal and the frequency band influence range, the system can manage frequency resources more efficiently, dynamically allocate the frequency band for signal transmission, minimize the interference of the interference source, and ensure the efficient use of spectrum resources.

[0175] In this embodiment, the acquisition module further includes:

[0176] A collection unit, configured to collect a bit error rate baseline value under normal communication of the radio frequency antenna based on a bit error rate threshold preset in each frequency band;

[0177] A fourth determination unit, configured to determine whether the bit error rate baseline value exceeds the bit error rate threshold;

[0178] The fourth execution unit is used to monitor the fluctuation duration of the bit error rate baseline value, and obtain the change form of the interference signal according to the fluctuation duration, wherein the change form specifically includes instantaneous change and trend increase.

[0179] In this embodiment, the system collects the bit error rate baseline value under normal communication of the RF antenna based on the pre-set bit error rate threshold of each frequency band, and then the system determines whether the bit error rate baseline value exceeds the bit error rate threshold to execute the corresponding steps; for example, when the system determines that the bit error rate baseline value under normal communication of the RF antenna does not exceed the bit error rate threshold, the system will consider that the current communication quality is stable and the bit error rate is within the range allowed by the system. The system will maintain the existing RF antenna transmission power and does not need to adjust the antenna gain or reduce the transmission power because the signal transmission quality is sufficiently stable. At the same time, the system continues to monitor the change of the bit error rate, especially in a dynamic environment, to ensure that the bit error rate does not suddenly increase and the communication quality does not deteriorate. In addition to the bit error rate, the system should continue to monitor other related parameters such as the signal-to-noise ratio to further confirm the stability and security of the communication link. If the signal-to-noise ratio is in a higher range, it means that the interference and noise are low and the communication quality is good. In addition, according to the current stable communication situation, the allocation of spectrum resources is optimized. Since the communication quality of this frequency band is good, the system can accommodate more communication tasks on the same frequency band, reasonably allocate bandwidth resources, and enhance communication efficiency. For example, when the system determines that the signal-to-noise ratio is within a higher range, the system can further monitor the signal-to-noise ratio to ensure that the signal-to-noise ratio is within a higher range, which indicates that the interference and noise are low and the communication quality is good. In addition, according to the current stable communication situation, the allocation of spectrum resources is optimized. Since the communication quality of this frequency band is good, the system can accommodate more communication tasks on the same frequency band, reasonably allocate bandwidth resources, and enhance communication efficiency. When the bit error rate baseline value under normal communication of the frequency antenna exceeds the bit error rate threshold, the system will consider that the current communication quality is unstable and the bit error rate has exceeded the allowable range. The system will monitor the fluctuation duration of the bit error rate baseline value and obtain the change form of the interference signal according to different fluctuation durations. The change form specifically includes instantaneous change and trend increase. By identifying the instantaneous change of the bit error rate, the system can quickly locate the instantaneous interference source. For example, a short electromagnetic pulse or environmental noise change can cause a sudden increase in the bit error rate. By capturing these instantaneous changes, the system can quickly take temporary measures (such as temporarily increasing power and switching frequency bands) to stabilize communication. At the same time, by analyzing the duration and change form of the bit error rate fluctuation, the system can adaptively adjust the working parameters of the RF antenna. For example, when a trend of bit error rate increase is detected, the system can plan frequency hopping in advance to avoid communication interruption. In addition, the system can also adjust the frequency range or transmission power of the antenna based on the fluctuation type to combat different types of interference sources. By detecting the instantaneous increase or trend change of the bit error rate, the system can take measures in the initial interference stage to prevent the bit error rate from reaching an excessively high level, thereby improving the reliability of the overall communication link.

[0180] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for adaptively tuning a radio frequency antenna for multiple frequency bands, characterized in that: The following steps are involved: A spectrum monitoring instrument preset based on a radio frequency antenna collects interference signals between different frequency bands and identifies corresponding signal features from the interference signals, wherein the signal features specifically include frequency offset and waveform; Determining whether the signal characteristics match a preset interference source; If so, according to the working requirements of the RF antenna in different frequency bands, activate the preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna, collect the interference characteristics of the frequency band in real time, and adaptively adjust the frequency band parameters of the RF antenna according to the interference characteristics, wherein the interference characteristics specifically include time characteristics, space characteristics and channel characteristics, and the frequency band parameters specifically include frequency band range, frequency resolution and frequency step; Determining whether the frequency band parameters detect preset spectrum congestion; If detected, the radio frequency antenna is controlled to perform frequency hopping communication based on a preset frequency hopping sequence, and the signal isolation of the radio frequency antenna is optimized by applying dynamically allocated subcarriers according to the real-time spectrum sensing information of the radio frequency antenna, and the frequency interval between frequency band channels is increased, wherein the spectrum sensing information specifically includes signal strength, frequency band occupancy rate and signal utilization rate; The step of collecting interference characteristics of the frequency band in real time and adaptively adjusting the frequency band parameters of the radio frequency antenna according to the interference characteristics further includes: Based on the frequency change of the interference signal, acquiring drift data of the interference signal, wherein the drift data specifically includes a drift amplitude and a drift speed; Determining whether the drift data meets the preset multipath interference; If yes, then identify the impact of the multipath effect on different frequency bands, calculate the destructive efficiency of the multipath interference on signal transmission at a specific frequency according to the impact, obtain the frequency selective fading corresponding to the multipath interference, and limit the modulation mode of the radio frequency antenna according to the frequency selective fading, wherein the modulation mode specifically includes amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation; Wherein, the step of controlling the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence includes: Based on a pre-drawn spectrum interference distribution map, a frequency band interval state is identified from the spectrum interference distribution map, wherein the frequency band interval state specifically includes an interference-free frequency band and a severely interfered frequency band; Determining whether the frequency band interval state meets the preset frequency hopping condition; If so, a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate is selected from the frequency band interval status, the operating frequencies of the preset transmitter and the preset receiver are dynamically adjusted according to the frequency band interval status, the RF antenna is controlled to switch to the frequency band to be hopped, and the preset frequency hopping control signal of the RF antenna is activated during the frequency hopping process to maintain a continuous data link of the RF antenna.

2. The method for adaptively tuning a radio frequency antenna for multiple frequency bands according to claim 1, characterized in that: Before the step of activating a preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna according to the working requirements of the RF antenna in different frequency bands, the method further includes: Based on the preset network analyzer of the radio frequency antenna, the scattering parameters at both ends of the matching network are measured from the input end and the output end of the radio frequency antenna, and the corresponding input impedance curve and output impedance curve are drawn according to the scattering parameters; Determining whether the input impedance curve and the output impedance curve are within a preset target frequency range; If not, the transmission line characteristic parameters of the RF antenna are detected through both ends of the matching network, and the impedance discontinuity point of the RF antenna is identified according to the drawn impedance curve and the transmission line characteristic parameters, wherein the transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio.

3. The method for adaptively tuning a radio frequency antenna for multiple frequency bands according to claim 1, characterized in that: Before the step of controlling the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence, the method further includes: Based on the preset main frequency band range of the radio frequency antenna, at least two sub-frequency bands are divided, and according to the spectrum management parameters of the sub-frequency bands, the preset radio frequency signal is divided into sub-signals of the corresponding number of sub-frequency bands, and the transmission power of the sub-signals is adaptively adjusted, wherein the spectrum management parameters specifically include bandwidth, interference conditions and data transmission requirements; Determining whether multiple sub-signals are detected in a single sub-frequency band; If so, a preset multi-carrier modulation technology is applied to generate carrier signals with mutually orthogonal frequencies, and the sub-signals are modulated onto corresponding carriers respectively, so that the sub-signals are independently transmitted through the sub-frequency bands, and the link quality of the sub-frequency bands is monitored in real time. The RF antenna is dynamically switched based on the link quality, wherein the link quality specifically includes the signal-to-noise ratio and the bit error rate.

4. The method for adaptively tuning a radio frequency antenna for multiple frequency bands according to claim 1, characterized in that: The step of determining whether the signal feature matches a preset interference source further includes: Based on the power spectral density of the radio frequency antenna, obtaining the intensity distribution and frequency range of the interference signal; Determining whether the intensity distribution and the frequency range meet the interference source characteristics; If so, the communication signal is collected simultaneously through the preset receiving point of the radio frequency antenna, the arrival angle and propagation path of the interference signal are identified, and the spatial distribution information of the interference signal in the frequency band is generated.

5. The method for adaptively tuning a radio frequency antenna for multiple frequency bands according to claim 1, characterized in that: The spectrum monitoring instrument preset based on the radio frequency antenna collects interference signals between different frequency bands, and the step of identifying corresponding signal features from the interference signals also includes: Based on the preset bit error rate thresholds of each frequency band, collecting the bit error rate baseline value under normal communication of the radio frequency antenna; Determining whether the bit error rate baseline value exceeds the bit error rate threshold; If so, monitor the fluctuation duration of the bit error rate baseline value, and obtain the change form of the interference signal according to the fluctuation duration, wherein the change form specifically includes instantaneous change and trend increase.

6. A multi-band RF antenna adaptive tuning system, characterized in that: include: An acquisition module is used to acquire interference signals between different frequency bands based on a spectrum monitoring instrument preset by a radio frequency antenna, and identify corresponding signal features from the interference signals, wherein the signal features specifically include frequency offset and waveform; A judgment module, used to judge whether the signal characteristics match a preset interference source; an execution module, for, if so, activating a preset adjustable reactance element to dynamically adjust the impedance matching parameters of the RF antenna according to the working requirements of the RF antenna in different frequency bands, collecting interference characteristics of the frequency band in real time, and adaptively adjusting the frequency band parameters of the RF antenna according to the interference characteristics, wherein the interference characteristics specifically include time characteristics, space characteristics, and channel characteristics, and the frequency band parameters specifically include frequency band range, frequency resolution, and frequency step; A second determination module is used to determine whether the frequency band parameters detect preset spectrum congestion; A second execution module is used to control the radio frequency antenna to perform frequency hopping communication based on a preset frequency hopping sequence if detected, and to optimize the signal isolation of the radio frequency antenna by applying dynamically allocated subcarriers according to real-time spectrum sensing information of the radio frequency antenna, and to increase the frequency interval between frequency band channels, wherein the spectrum sensing information specifically includes signal strength, frequency band occupancy rate and signal utilization rate; Wherein, the execution module also includes: An acquiring unit, configured to acquire drift data of the interference signal based on a frequency change of the interference signal, wherein the drift data specifically includes a drift amplitude and a drift speed; A judging unit, used to judge whether the drift data meets the preset multipath interference; an execution unit, configured to: if yes, identify the influence of the multipath effect on different frequency bands, calculate the destruction efficiency of the multipath interference on signal transmission at a specific frequency according to the influence, obtain the frequency selective fading corresponding to the multipath interference, and limit the modulation mode of the radio frequency antenna according to the frequency selective fading, wherein the modulation mode specifically includes amplitude modulation, frequency modulation, phase modulation and orthogonal amplitude modulation; The execution module also includes: an identification unit, configured to identify a frequency band interval state from a pre-drawn spectrum interference distribution map based on the spectrum interference distribution map, wherein the frequency band interval state specifically includes an interference-free frequency band and a severely interfered frequency band; A second judgment unit, used to judge whether the frequency band interval state reaches a preset frequency hopping condition; The second execution unit is used to select a frequency band to be hopped with a high signal-to-noise ratio and a low bit error rate from the frequency band interval state, dynamically adjust the operating frequencies of the preset transmitter and the preset receiver according to the frequency band interval state, control the RF antenna to switch to the frequency band to be hopped, activate the preset frequency hopping control signal of the RF antenna during the frequency hopping process, and maintain a continuous data link of the RF antenna.

7. The multi-band RF antenna adaptive tuning system according to claim 6, characterized in that: Also includes: A measurement module, configured to measure scattering parameters at both ends of a matching network from an input end and an output end of the RF antenna based on a network analyzer preset for the RF antenna, and to draw corresponding input impedance curves and output impedance curves according to the scattering parameters; A third judgment module is used to judge whether the input impedance curve and the output impedance curve are within a preset target frequency range; The third execution module is used to detect the transmission line characteristic parameters of the RF antenna through the two ends of the matching network, and identify the impedance discontinuity point of the RF antenna according to the drawn impedance curve and the transmission line characteristic parameters, wherein the transmission line characteristic parameters specifically include TDR signal, reflection coefficient and standing wave ratio.

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