A sea clutter data acquisition method and sea clutter test radar system

Abstract

The application provides a sea clutter data acquisition method and a sea clutter test radar system. The method provided by the application comprises: in each polarization mode, taking the highest distance resolution as a candidate distance resolution, controlling a transmitting channel unit and a phased array unit to perform beam staring to return an intermediate frequency signal; performing signal processing on the intermediate frequency signal according to a first type of parameter to obtain a target identification result, and performing sea clutter characteristic analysis on the intermediate frequency signal according to a second type of parameter to obtain sea clutter characteristic information; determining whether the candidate distance resolution matches sea state information according to the target identification result and the sea clutter characteristic information; when the match is achieved or when the match is not achieved and the candidate distance resolution is the lowest distance resolution, determining the currently collected sea clutter data as preferred sea clutter data; and when the match is not achieved and the candidate distance resolution is not the lowest distance resolution, taking the next highest distance resolution as the candidate distance resolution, and performing beam staring again.

Description

Technical Field

[0001] This application relates to the field of sea clutter measurement technology, and in particular to a method for acquiring sea clutter data and a sea clutter testing radar system. Background Technology

[0002] With the rapid development of the low-altitude economy, maritime operations involving drones, unmanned surface vessels, and small and medium-sized ships are increasing, placing higher demands on the precise management and surveillance of small, slow-moving targets in the sea. Against this backdrop, sea clutter suppression has become a key technical challenge for radar systems. Sea clutter, formed by signals reflected from the sea surface, can overlap with target signals, making target identification difficult. Therefore, accurately measuring sea clutter data is crucial for improving the sea clutter suppression capability of radar systems, thereby enhancing their identification capabilities in complex sea conditions. Summary of the Invention

[0003] In view of this, this application provides a method for acquiring sea clutter data and a sea clutter testing radar system to accurately collect sea clutter data that matches the sea state and target, so as to accurately carry out sea clutter suppression based on the sea clutter data.

[0004] Specifically, this application is implemented through the following technical solution:

[0005] The first aspect of this application provides a method for acquiring sea clutter data, the method being applied to a sea clutter test radar system, the method comprising:

[0006] Obtain sea state information for the current test point;

[0007] In each polarization mode, the highest range resolution is used as the alternative range resolution, and the transmit channel unit and phased array unit are controlled to perform beam staring so that the phased array unit returns the intermediate frequency signal during beam staring.

[0008] The intermediate frequency signal is processed according to the first type of parameters corresponding to the candidate range resolution to obtain the target recognition result. The sea clutter feature analysis is performed on the intermediate frequency signal according to the second type of parameters corresponding to the candidate range resolution to obtain the sea clutter feature information.

[0009] Based on the target identification results and sea clutter characteristic information, determine whether the candidate range resolution matches the sea state information;

[0010] When matching the alternative distance resolution with the sea state information, the currently acquired sea clutter data is determined as the preferred sea clutter data under the sea state information.

[0011] When the alternative range resolution does not match the sea state information, and the alternative range resolution is not the lowest range resolution, the next highest range resolution after the alternative range resolution is used as the alternative range resolution, and the transmission channel unit and the phased array unit are controlled to perform beam staring again.

[0012] When the alternative distance resolution does not match the sea state information, and the alternative distance resolution is the lowest distance resolution, the currently acquired sea clutter data is determined as the preferred sea clutter data under the sea state information.

[0013] The second aspect of this application provides a sea clutter testing radar system, which includes a display and control terminal, a transmission channel unit, a phased array unit, a target identification unit, a sea clutter analysis unit, and a communication unit;

[0014] The communication unit is used to acquire sea state information at the current test point;

[0015] The display and control terminal is used to control the transmission channel unit and the phased array unit to perform beam staring in each polarization mode, using the highest distance resolution as the alternative distance resolution, so that the phased array unit returns the intermediate frequency signal during the beam staring process.

[0016] The target recognition unit is used to perform signal processing on the intermediate frequency signal according to the first type of parameters corresponding to the candidate distance resolution to obtain the target recognition result;

[0017] The sea clutter analysis unit is used to perform sea clutter characteristic analysis on the intermediate frequency signal according to the second type of parameters corresponding to the alternative distance resolution, and obtain sea clutter characteristic information.

[0018] The display and control terminal is also used to determine whether the candidate range resolution matches the sea state information based on the target recognition result and sea clutter characteristic information. When the candidate range resolution matches the sea state information, the currently acquired sea clutter data is determined as the preferred sea clutter data. When the candidate range resolution does not match the sea state information and the candidate range resolution is not the lowest range resolution, the next highest range resolution after the candidate range resolution is used as the candidate range resolution, and the transmission channel unit and phased array unit are controlled to perform beam staring again. When the candidate range resolution does not match the sea state information and the candidate range resolution is the lowest range resolution, the currently acquired sea clutter data is determined as the preferred sea clutter data.

[0019] The sea clutter data acquisition method and sea clutter test radar system provided in this application first acquire the sea state at the test point. Then, starting from a candidate range resolution, the transmission channel unit and phased array unit are driven to perform a beam staring process in either horizontal or vertical polarization mode. The returned intermediate frequency signal is processed in conjunction with configuration parameters. The sea state is iteratively matched with the candidate range resolution, prioritizing accurate acquisition at high range resolution while ensuring availability as a fallback. Target recognition results are used simultaneously for verification, eliminating the possibility of misidentifying sea peaks as targets. This ensures that sea clutter data acquisition balances accuracy and rationality. The matching and judgment process identifies sea clutter data suitable for sea state and target characteristics, providing high-quality samples for clutter modeling and target recognition. The system covers multiple polarization modes and is fully automated, improving the radar system's adaptability and data quality to complex sea states from the data source end, supporting efficient operation in scenarios such as marine surveillance and control. Attached Figure Description

[0020] Figure 1 A flowchart of an embodiment of the sea clutter data acquisition method provided in this application;

[0021] Figure 2 This is a schematic diagram of an exemplary sea clutter testing radar system shown in this application;

[0022] Figure 3 A flowchart of Embodiment 2 of the sea clutter data acquisition method provided in this application. Detailed Implementation

[0023] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0024] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used herein are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0025] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0026] The following specific embodiments are given to illustrate the technical solution of this application in detail.

[0027] Figure 1 This is a flowchart of an embodiment of the sea clutter data acquisition method provided in this application. Please refer to... Figure 1 The sea clutter data acquisition method provided in this embodiment may include:

[0028] S101. Obtain sea state information for the current test point.

[0029] Specifically, sea state information is a comprehensive description of the state of the ocean surface and nearshore environment. It encompasses a set of data composed of ocean dynamic factors such as waves, currents, and tides, as well as physical characteristics such as seawater temperature, salinity, and sea-air meteorology. It can reflect the real-time or forecast state of the marine environment and provide basic marine environmental data and risk references for activities such as navigation safety, marine resource development, and marine scientific research and observation.

[0030] It should be noted that the sea clutter data acquisition method provided in this embodiment is applied to a sea clutter test radar system. Figure 2 This is a schematic diagram of a sea clutter testing radar system as exemplarily shown in this application.

[0031] Please refer to Figure 2 The sea clutter test radar system includes a communication unit comprising a 5G-A broadband access device (5G-A CPE, 5G-A Customer Premises Equipment) and a BeiDou command unit, which can achieve communication functions through the collaboration of the two modules. When acquiring sea state information at the current test point, in one possible implementation, if a buoy is positioned at the current test point, the BeiDou command unit can receive wave information transmitted by the buoy at the current test point and generate sea state information based on the wave information.

[0032] Specifically, the Beidou command unit relies on the Beidou system to transmit and receive data, and has the ability to communicate stably in the marine environment. It is the hardware foundation for the sea clutter test radar system to interact with external equipment, such as buoys and back-end servers.

[0033] The current test site is the target sea area where the sea clutter test radar system is collecting sea clutter data. The buoy is a marine observation device deployed in the test site area, capable of collecting wave information in real time. This wave information, which is the characteristic data of ocean surface fluctuations monitored by the buoy, is the basic input for generating sea state information.

[0034] In practical implementation, when observation buoys are present around the current test point, the BeiDou command unit can receive wave information transmitted by the buoys or sea state information transmitted by the backend server, and then send this information to the display and control terminal. Furthermore, the BeiDou command unit can also utilize the BeiDou system to receive configuration parameter commands from the backend server and send these commands to the display and control terminal. Moreover, the BeiDou command unit can set its own operating mode based on commands sent by the display and control terminal, and can receive the overall operating status from the display and control terminal and transmit it back to the backend server.

[0035] Furthermore, in another possible implementation, sea state information sent by a backend server can also be received through a 5G-A broadband access device; wherein, the backend server obtains the sea state information at the current test point from a third-party device.

[0036] Specifically, the 5G-A broadband access equipment relies on the 5G network to achieve high-speed data transmission. It serves as the hardware carrier for information interaction between the sea clutter test radar system and the backend server, possessing high bandwidth and low latency communication characteristics. The backend server coordinates data distribution and command management, acquiring information from third-party devices and transmitting it to the display and control terminal; it acts as the central hub for the relay and processing of sea state information. The third-party devices are platforms capable of acquiring sea state information at the current test point.

[0037] Understandably, the display and control terminal can choose either of two paths to acquire sea state information. For example, it can receive wave information transmitted by buoys and generate sea state information solely through the BeiDou command unit; or it can receive sea state information transmitted by the backend server solely through the 5G-A broadband access device. The 5G-A broadband access device, with its advantages of high bandwidth and low latency, can also transmit sea clutter data at high speed. Of course, the display and control terminal can also simultaneously employ both paths to acquire sea state information, forming data complementarity or verification. For example, it can both receive wave information directly transmitted by buoys through the BeiDou command unit to generate sea state data and receive sea state information obtained by the backend server from third-party devices through the 5G-A broadband access device. The display and control terminal can then fuse the two data streams, enhancing the timeliness and reliability of sea state information acquisition and providing accurate environmental baseline data for obtaining optimal sea clutter data.

[0038] S102. In each polarization mode, the highest range resolution is used as the alternative range resolution, and the transmit channel unit and phased array unit are controlled to perform beam staring so that the phased array unit returns the intermediate frequency signal during beam staring.

[0039] Specifically, polarization mode refers to the vibration direction characteristics of the electric field vector when an electromagnetic wave propagates in space, and it is one of the important parameters of a sea clutter testing radar system. In this embodiment, the polarization modes of the sea clutter testing radar system are mainly divided into two categories: horizontal polarization mode and vertical polarization mode. The difference between the two polarization modes is mainly reflected in the vibration direction of the electromagnetic wave. By switching polarization modes, the system can adapt to the needs of sea clutter data acquisition in different marine environments.

[0040] In practice, the phased array element surface can be switched from horizontal polarization mode to vertical polarization mode by rotating it by 90°.

[0041] Furthermore, range resolution refers to the minimum resolvable distance at which the sea clutter test radar system can distinguish two adjacent targets in the same direction. The smaller the range resolution value, the stronger the resolution capability and the higher the data acquisition accuracy. In specific implementation, in this embodiment, the sea clutter test radar system supports multiple range resolutions. For example, in one possible implementation, the range resolutions from high to low are 3 meters, 5 meters, 10 meters, and 20 meters.

[0042] In practice, one can start with the highest resolution, attempting to collect data at the optimal resolution to preserve target details and sea clutter features to the greatest extent possible. This avoids missing high-value data due to initially choosing a low resolution, and allows for finding a distance resolution suitable for the current sea state information in the fewest steps, improving efficiency and ultimately achieving a balance between meeting target identification requirements and adapting to the marine environment.

[0043] It should be noted that each range resolution is associated with a set of configuration parameters, and the configuration parameters associated with different range resolutions are different. This set of configuration parameters includes the configuration parameters corresponding to the transmit channel unit, the configuration parameters corresponding to the phased array unit, the first type of parameters corresponding to the target identification unit, and the second type of parameters corresponding to the sea clutter analysis unit.

[0044] The method provided in this embodiment dynamically adjusts the configuration parameters of the sea clutter test radar system according to the changing range resolution requirements, thereby achieving dynamic adjustment of the range resolution of the sea clutter test radar system and solving the problem of the single range resolution in existing sea clutter test radars during online measurement.

[0045] In this embodiment, during each beam staring process, a matching distance resolution is found in either the horizontal or vertical polarization mode, i.e., a configuration parameter that matches the sea state environment and the target fine-grained identification characteristics is found, and the optimal sea clutter data is obtained based on this.

[0046] In this step, under each polarization mode, the highest range resolution is selected as the alternative range resolution. The transmit channel unit and phased array unit in the sea clutter test radar system are controlled to perform beam staring, and the intermediate frequency (IF) signal returned by the phased array unit during beam staring is acquired. Beam staring refers to adjusting the beam direction by controlling the phase difference of the antenna array in the phased array unit, so that it is always focused on a specific target or area, and continuously acquiring the IF signal of that area.

[0047] The following is a brief introduction to the transmit channel unit and phased array unit in the sea clutter test radar system:

[0048] For details, please continue to refer to... Figure 2 The transmitting channel unit involves baseband waveform generation, digital up-conversion, and DAC digital-to-analog conversion. The transmitting channel unit mainly receives radar system parameter configuration instructions sent by the display and control terminal and generates intermediate frequency excitation and control signals that meet the parameter requirements (frequency, pulse width, PRF, peak power, waveform quality).

[0049] Furthermore, the phased array unit is the core transceiver component of the sea clutter test radar system, realizing the transmission and reception of electromagnetic waves. It features vertical / horizontal dual polarization switching, up / down conversion, azimuth mechanical scanning, elevation phase scanning, and two-dimensional phase scanning. It mainly consists of an antenna array, a T / R module, an RF module, a beam control module, a power supply module, and a servo turntable. The antenna array is an array structure composed of multiple antenna elements, used to form a beam at a specified spatial angle to realize the transmission of electromagnetic waves and the reception of echo signals. The T / R module is responsible for amplifying and phase-compensating the transmitted excitation signal, and simultaneously amplifying and adjusting the amplitude and phase of the received echo signal. The RF module processes RF signals, undertaking the up-conversion modulation of the transmitted intermediate frequency signal and the down-conversion demodulation of the received echo signal. The beam control module converts beam pointing commands into control signals, regulates the operation of the T / R module, and is responsible for power conversion and distribution. The power supply module provides power to all components of the antenna array. The servo turntable is the mechanical device that drives the antenna array to perform azimuth mechanical scanning.

[0050] In practice, during transmission, the beam control module receives commands such as beam pointing and transmit / receive switching, converts them into amplitude and phase control signals and transmit / receive control signals required by the T / R module, and allocates adaptation voltages to the T / R module and antenna array. The servo turntable adjusts the array face to the corresponding azimuth according to the pointing requirements. Further, the RF module receives the intermediate frequency signal transmitted from the baseband, up-converts and modulates it into a high-frequency signal before transmitting it to the T / R module. The T / R module amplifies and performs phase compensation on this excitation signal to ensure that the transmitted signal strength and phase meet the beam pointing requirements. The processed transmitted signal is then sent to the antenna array, which forms a focused beam at a specified spatial angle, transmitting the electromagnetic wave to the target area.

[0051] Furthermore, during the reception process, the antenna array receives the echo signal from the target and transmits it to the T / R module. The T / R module amplifies and adjusts the amplitude and phase of the echo signal to compensate for transmission loss and calibrate phase consistency. The RF module down-converts the received RF signal from the TR module to an intermediate frequency (IF) output, forming an IF signal used for subsequent processes such as target identification and sea clutter characteristic analysis. It should be noted that this IF signal includes the sum IF signal, azimuth difference IF signal, and elevation difference IF signal.

[0052] Understandably, the priority is to adapt to the detection scenarios of small, slow-moving targets at sea, leveraging the strong target discrimination capability of the highest resolution to accurately capture details of small targets. At the same time, by combining two polarization modes, the differences in sensitivity to sea clutter caused by different polarizations can be utilized to cover diverse marine environments. Combined with beam staring to focus on test points, this provides high-quality data for subsequent processing.

[0053] S103. Perform signal processing on the intermediate frequency signal according to the first type of parameters corresponding to the candidate range resolution to obtain the target recognition result, and perform sea clutter feature analysis on the intermediate frequency signal according to the second type of parameters corresponding to the candidate range resolution to obtain sea clutter feature information.

[0054] For details, please continue to refer to... Figure 2 The sea clutter test radar system is equipped with a target identification unit, which performs signal processing on the intermediate frequency (IF) signal. Furthermore, the system also includes a sea clutter analysis unit, which performs sea clutter characteristic analysis on the IF signal.

[0055] Specifically, the intermediate frequency signal is processed according to the first type of parameters corresponding to the candidate distance resolution to obtain the target recognition result, including:

[0056] Step 1: Acquire the intermediate frequency signal and perform a first down-conversion process on the acquired digital signal to obtain a first down-conversion processed signal.

[0057] Please see Figure 2 The target recognition and processing unit includes a first digital acquisition module, a first digital down-conversion module, a first digital pulse compression module, a moving target detection module, a constant false alarm rate (CFAR) detection module, and a point tracking processing module. In this step, the first digital acquisition module acquires the intermediate frequency signal, and the first digital down-conversion module performs a first down-conversion processing on the acquired digital signal to obtain the first down-converted signal.

[0058] Specifically, signal acquisition refers to the digital conversion of intermediate frequency (IF) signals. An analog-to-digital converter (ADC) transforms the analog signal into a digital signal, providing a calculable digital signal for subsequent processing. The digital signal is a discretized electrical signal obtained after acquisition and serves as the input basis for the first down-conversion process. The first down-conversion process involves spectrum shifting of the digital signal, converting it from a higher IF frequency to a baseband signal.

[0059] Step 2: Perform first digital pulse compression processing on the first down-conversion signal to obtain a first pulse compressed signal.

[0060] For specific implementation details, please refer to [link / reference]. Figure 2 The first digital pulse compression module performs first digital pulse compression processing on the first down-conversion signal to resolve the contradiction between detection distance and distance resolution.

[0061] Step 3: Perform moving target detection, constant false alarm rate detection, and point tracking processing on the first pulse compression signal in sequence to obtain the target recognition result.

[0062] For details, see Figure 2 Moving target detection (MPD) is the process of distinguishing moving targets from static clutter by analyzing the Doppler frequency shift characteristics of echo signals. It can suppress static clutter interference, focus on the echo of the moving target, and provide a clean signal for subsequent detection. It is implemented through the moving target detection module. Constant false alarm rate (CFAR) detection is a technique that adaptively adjusts the detection threshold to keep the false alarm probability (the probability of misidentifying a non-target as a target) constant. It is used to ensure a stable target detection rate and reduce false alarms in environments with varying noise and clutter intensity. It is implemented through the CFAR detection module. Point trajectory processing is the process of associating discrete target points over a continuous time period into a complete motion trajectory and estimating the target state. It is used to eliminate the randomness of single-point detection, provide continuous and stable target motion information, and support decision-making. It is implemented through the point trajectory module.

[0063] Furthermore, after signal processing, the target recognition result can be obtained. The target recognition result is based on the first type of parameters corresponding to the candidate distance resolution. After a series of processing of the intermediate frequency signal, the result is a judgment result on whether there is a target at the current test point and the target status.

[0064] It should be noted that the first type of parameters includes all parameters in the first digital acquisition, first down-conversion processing, first digital pulse compression processing, moving target detection, constant false alarm rate detection, and point track processing. When the distance resolution changes, the parameters in the first type that need to be changed include the bandwidth and pulse width corresponding to the first down-conversion processing, the bandwidth and pulse width corresponding to the first digital pulse compression processing, and the point track aggregation distance threshold and point track filtering threshold used in the point track processing. In other words, the distance resolution is correlated with the bandwidth and pulse width corresponding to the first down-conversion processing, the bandwidth and pulse width corresponding to the first digital pulse compression processing, and the point track aggregation distance threshold and point track filtering threshold used in the point track processing. After the distance resolution changes, the display and control terminal can determine a set of first type parameters (including parameters that remain unchanged and parameters that need to be changed) corresponding to the current distance resolution based on prior knowledge or related calculations, and then notify the target recognition unit of this set of first type parameters, which the target recognition unit then uses to perform target recognition.

[0065] Furthermore, while obtaining the target identification results, it is necessary to perform sea clutter feature analysis on the intermediate frequency signal based on the second type of parameters corresponding to the alternative distance resolution to obtain sea clutter feature information.

[0066] Optionally, in one possible implementation, the step of performing sea clutter feature analysis on the intermediate frequency signal based on the second type of parameters corresponding to the alternative distance resolution to obtain sea clutter feature information includes:

[0067] Step 1: Acquire the intermediate frequency signal and perform a second down-conversion on the acquired digital signal to obtain the second down-converted signal.

[0068] Please continue to refer to Figure 2 The sea clutter test radar system includes a sea clutter analysis unit to process the intermediate frequency (IF) signal. Furthermore, the sea clutter analysis unit may include a second digital acquisition module, a second digital down-conversion module, a second digital pulse compression module, and a sea clutter characteristic analysis module. Its specific functions are to acquire the IF signal, convert and filter it, store or transmit I / Q data, and simultaneously extract the time-domain and frequency-domain characteristics of the sea clutter and send them to the display and control terminal.

[0069] In practice, the second digital acquisition module receives the intermediate frequency signal output by the phased array unit and acquires the signal. The acquired digital signal is then transmitted to the second digital down-conversion module for data processing. The second down-conversion process converts the digital signal processed by the digital acquisition module into a baseband signal.

[0070] Step 2: Perform second digital pulse compression processing on the second down-conversion signal to obtain a second pulse compressed signal.

[0071] In practice, the second digital pulse compression module is used to perform digital pulse compression processing on the received signal to resolve the contradiction between the radar's detection range and range resolution. The I and Q branch data processed by the digital pulse compression module are sent to a large-capacity storage unit for storage, and also sent to the 5G-A broadband access device for online transmission.

[0072] Step 3: Extract the time-domain and frequency-domain features of the second pulse compression signal, and determine the time-domain and frequency-domain features as the sea clutter feature information under the alternative range resolution.

[0073] Specifically, this step can be achieved through the sea clutter characteristics analysis module. The time-domain characteristics reflect the statistical properties of sea clutter over time, while the frequency-domain characteristics reflect the energy distribution characteristics of sea clutter over frequency.

[0074] Furthermore, it is understood that the second type of parameters includes all parameters in the second digital acquisition, second down-conversion processing, and second digital pulse compression processing. When the distance resolution changes, the parameters in the second type that need to be changed include the bandwidth and pulse width corresponding to the second down-conversion processing, and the bandwidth and pulse width corresponding to the second digital pulse compression processing. In other words, the distance resolution and the bandwidth and pulse width corresponding to the second down-conversion processing and the second digital pulse compression processing are correlated. After the distance resolution changes, the display and control terminal can determine a set of second type parameters (including parameters that remain unchanged and parameters that need to be changed) corresponding to the current distance resolution based on prior knowledge or related calculations, and then notify the sea clutter analysis unit of this set of second type parameters. The sea clutter analysis unit then performs sea clutter characteristic analysis based on this.

[0075] S104. Determine whether the candidate range resolution matches the sea state information based on the target identification results and sea clutter characteristic information.

[0076] In practice, the specific implementation process of this step may include:

[0077] Step 1: Determine whether there are sea spikes based on the sea clutter feature information, and obtain the sea spike discrimination result.

[0078] Specifically, sea spikes are a special type of electromagnetic scattering phenomenon, referring to high-intensity, short-duration spike signals that occasionally appear in radar echoes. Essentially, they are specular reflection areas formed locally on the surface of ocean waves, causing radar waves to be strongly reflected back to the receiver, generating signals with amplitudes far exceeding normal sea clutter. The presence of sea spikes may cause radar to misidentify them as targets; therefore, accurate identification of sea spikes is crucial for sea clutter testing radar systems. Furthermore, in special circumstances, when the characteristics of a real target are very similar to background sea clutter (including sea spikes), the sea clutter testing radar system may perceive it as "just a large sea spike," thus filtering it out or ignoring it, resulting in missed alarms.

[0079] Furthermore, in determining the presence of sea clutter, an analysis is conducted based on both time-domain and frequency-domain characteristics. Specifically, the presence of sea clutter characteristics is first assessed in the time domain, as sea clutter often manifests as short-duration, sudden energy spikes. The time-domain amplitude characteristics of sea clutter can directly capture amplitude anomalies and instantaneous energy changes. If sea clutter exhibits short-duration high amplitude, a sea clutter spike is suspected. In the frequency domain, sea clutter exhibits significant Doppler spectral broadening. Therefore, the spectral width of sea clutter is used for assessment. If the spectral width of sea clutter is significantly wider than that of the surrounding area, a sea clutter spike is suspected. Finally, the results from both the time and frequency domain assessments are combined. If both the time-domain and frequency-domain characteristics of sea clutter in the same area indicate a possible sea clutter spike, then the presence of a sea clutter spike is confirmed; otherwise, the absence of a sea clutter spike is determined.

[0080] Step 2: When the sea peak discrimination result indicates that no sea peak appears, determine the alternative distance resolution to match the sea state information.

[0081] Step 3: When the sea peak discrimination result indicates the appearance of sea peaks and the target recognition result indicates that no target is recognized, determine the alternative distance resolution to match the sea state information.

[0082] Specifically, the sea spike discrimination result indicates the presence of sea spikes, but the target recognition result indicates that no target was identified. This means that under the alternative range resolution, the true target features can be distinguished from the background sea clutter (including sea spikes). In this case, the alternative range resolution is determined to match the sea state information.

[0083] Step 4: When the sea peak discrimination result indicates the appearance of a sea peak and the target recognition result indicates that a target has been identified, if the sea peak discrimination result and the target recognition result still indicate the simultaneous presence of a sea peak and a target after a preset time, it is determined that the alternative distance resolution does not match the sea state information; otherwise, it is determined that the alternative distance resolution matches the sea state information.

[0084] Specifically, if the target recognition result shows a target and the sea peak discrimination result shows a sea peak, it means that the current candidate distance resolution may cause the sea peak to appear and be misjudged as a target, or the target may have just appeared, causing the sea peak to appear simultaneously, resulting in confusion between the target and the sea peak. In this case, wait for a preset time T (for example, the preset time T can be 2 seconds, which can be set according to the actual situation) and then measure the sea peak and target situation again. If the sea peak and target still exist simultaneously, it means that the misjudgment of the target is due to the appearance of the sea peak, and it is determined that the candidate distance resolution does not match the sea state information. If the two do not appear simultaneously, it means that the target has passed through the test area, and it is determined that the candidate distance resolution matches the sea state information.

[0085] Understandably, in this step, the judgment can be made based on the existing identification results without the need for additional complex calculations. This can efficiently trigger the distance resolution adjustment mechanism, which avoids target misjudgment due to mismatch of alternative distance resolutions and can respond to changes in sea state in a timely manner to maintain the reliability of identification.

[0086] S105. When the alternative distance resolution is matched with the sea state information, the currently acquired sea clutter data is determined as the preferred sea clutter data under the sea state information.

[0087] For details, see Figure 2 The sea clutter data currently collected is the data processed by the second digital pulse compression module.

[0088] It should be noted that the preferred sea clutter data is the data collected under conditions where the candidate range resolution and sea state information are matched, and which can accurately reflect the true characteristics of sea clutter. The preferred sea clutter data can serve as a standard reference under this sea state information, used to optimize the sea clutter model, adjust configuration parameters, or provide a reliable benchmark for subsequent target recognition algorithms, thereby improving the target recognition capability and anti-interference capability of the sea clutter test radar system under similar sea state information.

[0089] S106. When the alternative range resolution does not match the sea state information, and the alternative range resolution is not the lowest range resolution, the next highest range resolution after the alternative range resolution shall be used as the alternative range resolution, and the transmission channel unit and the phased array unit shall be controlled to perform beam staring again.

[0090] Specifically, when the alternative range resolution does not match the sea state information, it is further determined whether the alternative range resolution is the lowest range resolution. If the alternative range resolution is not the lowest range resolution, the next highest range resolution after the alternative range resolution is used as the alternative range resolution, and the transmission channel unit and phased array unit are controlled to perform beam staring again.

[0091] In practical implementation, for example, the candidate range resolutions of a sea clutter test radar system are ordered from highest to lowest as 3 meters, 5 meters, 10 meters, and 20 meters, with 3 meters being the highest resolution and 10 meters the lowest. First, beam staring is performed using the highest resolution of 3 meters as the candidate range resolution. After acquiring the intermediate frequency (IF) signal, analysis reveals that the 3-meter resolution does not match the current sea state. Since 3 meters is not the lowest resolution, the next possible range resolution, 5 meters, is set as the candidate range resolution. Beam staring is then re-executed using the transmit channel unit and phased array unit, returning to the IF signal and repeating the above process. If the 5-meter resolution is still deemed incompatible, the next possible resolution, 10 meters, is used as the candidate range resolution for retry until a range resolution matching the sea state information is found. This achieves dynamic adaptation of the optimal range resolution under different sea states.

[0092] It should be noted that, as described above, the sea clutter test radar system supports multiple range resolutions, each associated with a set of configuration parameters. These parameters include those corresponding to the transmit channel unit and the phased array unit. In this step, when beam staring is performed again at the next second-highest range resolution as a candidate range resolution, the configuration parameters corresponding to the transmit channel unit and the phased array unit change due to the change in range resolution. For example, the bandwidth and pulse width of the transmit channel unit, and the bandwidth of the phased array unit, change with the change in range resolution.

[0093] S107. When the alternative distance resolution does not match the sea state information, and the alternative distance resolution is the lowest distance resolution, the currently collected sea clutter data is determined as the preferred sea clutter data under the sea state information.

[0094] Specifically, when the alternative range resolution does not match the sea state information and has been reduced to the lowest possible resolution—for example, when the alternative range resolutions for a sea clutter test radar system are 3 meters, 5 meters, 10 meters, and 20 meters in descending order, with 20 meters being the lowest range resolution—although a matching error still exists at the lowest range resolution, hardware limitations in practical applications prevent further changes to the resolution. In this case, the sea clutter test radar system chooses to accept the current error and uses the currently acquired sea clutter data as the preferred sea clutter data that matches the current configuration parameters.

[0095] It should be noted that the method provided in this embodiment acquires real-time sea state information and then performs online analysis on sea clutter data collected under different range resolutions and polarization modes to determine the configuration parameters that match the sea state and target characteristics. It then acquires the sea clutter data collected under these configuration parameters. This solves the problems of low data quality and poor sea clutter characteristic analysis in current sea clutter test radar systems due to the lack of online correlation with the environment and target requirements. It ensures that the collected sea clutter data is highly matched with the current sea state and target characteristics, thereby improving the quality and accuracy of the data.

[0096] The sea clutter data acquisition method provided in this embodiment first acquires the sea state at the test point. Then, starting from the alternative range resolution, it drives the transmit channel unit and phased array unit to perform beam staring in either horizontal or vertical polarization mode. It processes the intermediate frequency signal in conjunction with configuration parameters and iteratively matches the sea state with the range resolution. This prioritizes accurate acquisition at high range resolution while ensuring availability as a fallback. Simultaneously, target identification results are used to assist in verification, eliminating the possibility of misidentifying sea peaks as targets. This ensures that sea clutter data acquisition balances accuracy and rationality. Matching and determining sea clutter data suitable for sea state and target characteristics provides high-quality samples for clutter modeling and target identification. The method covers multiple polarization modes and is fully automated, improving the adaptability and data quality of the sea clutter test radar system to complex sea states from the data source end, supporting efficient operation in scenarios such as marine surveillance and control.

[0097] Optionally, in one possible implementation, the method further includes:

[0098] The 5G-A broadband access device transmits the operating status, current configuration parameters, and preferred sea clutter data of the sea clutter test radar system back to the backend server as a set of data.

[0099] It should be noted that the method provided in this embodiment enables the 5G-A broadband access device to achieve high-speed online backhaul of large-capacity sea clutter data using multi-carrier aggregation. This solves the problem that the backend server cannot acquire large-capacity sea clutter data online using the sea clutter test radar under unattended conditions, thus expanding the application scope of the sea clutter test radar system.

[0100] Figure 3 This is a flowchart of Embodiment 2 of the sea clutter data acquisition method provided in this application. Please refer to... Figure 3 Based on the above embodiments, the method further includes:

[0101] S301. Receive a first control command through the 5G-A broadband access device and a second control command through the BeiDou command unit; the first control command and the second control command are control commands sent simultaneously by the backend server to the 5G-A broadband access device and the BeiDou command unit.

[0102] Specifically, control commands are operation instructions sent by the backend server to the sea clutter test radar system, such as adjusting parameters and switching modes, to control the working status of the sea clutter test radar system.

[0103] It is understandable that redundant links are constructed by leveraging the technological complementarity between 5G-A broadband access equipment and the BeiDou command and control unit. 5G-A broadband access equipment is suitable for unmanned, high-speed data transmission over sea clutter. The BeiDou command and control unit relies on BeiDou satellites and is suitable for scenarios involving low-speed buoy communication at sea. Simultaneously, both transmit commands synchronously, ensuring at least one link can reliably receive them, preventing the loss of control commands due to a single link failure, and improving the reliability of control command transmission.

[0104] In practice, for example, the backend server generates a command to start beam staring mode for the sea clutter test radar measurement task. The command is pushed simultaneously through 5G base stations and Beidou satellites. The 5G-A broadband access device and the Beidou command unit receive the same command, thus completing dual-mode reception.

[0105] S302. Compare and verify the first control command and the second control command.

[0106] Specifically, the comparison and verification process involves comparing the content of two commands field by field, such as command type, parameter values, and effective time, to determine if they match completely. If all fields are identical, it is a match; otherwise, it is a mismatch. For example, if both the first and second control commands are horizontal polarization, a word-for-word comparison will show identical fields, indicating a match. Conversely, if both commands are vertical polarization, a word-for-word comparison will show inconsistent fields, indicating a mismatch.

[0107] Understandably, the above methods can filter out erroneous commands caused by link transmission errors, ensuring command correctness from the source.

[0108] S303. When the comparison and verification results of the first control instruction and the second control instruction are consistent, execute either the first control instruction or the second control instruction.

[0109] Specifically, since the two instructions are completely identical, either one can be executed. Ensure the instructions are correct before proceeding to guarantee the effective operation of the sea clutter test radar system.

[0110] S304. When the comparison and verification results of the first control command and the second control command are inconsistent, the backend server is requested to resend the control command and compare the first control command received through the 5G-A broadband access device with the second control command received through the Beidou command unit again.

[0111] Specifically, inconsistencies in command verification are mostly due to temporary transmission errors, such as 5G packet loss or weak BeiDou signals, rather than errors in the command itself. Retransmission can retrieve the correct command, avoiding the execution of erroneous commands. Retransmission compensates for single transmission errors, improving command reliability. For example, if the first received command has a sampling frequency of 1MHz and the second command has a sampling frequency of 2MHz, and a discrepancy is detected, the display and control terminal sends a retransmission request to the backend server. After the backend server re-pushes the command, the display and control terminal receives it again. If the second verification matches, it executes; otherwise, it requests another retransmission.

[0112] S305. If the comparison and verification results of the 5G-A broadband access device and the Beidou command unit are still inconsistent within a preset number of times, channel communication accuracy tests are performed on the channels corresponding to the 5G-A broadband access device and the Beidou command unit respectively, and the channel with high communication accuracy is selected based on the test results to receive instructions from the backend server.

[0113] Specifically, if the instructions received by the 5G-A broadband access device and the BeiDou command unit are still inconsistent after multiple verifications, such as three times, test instructions with known content are sent to both the 5G-A broadband access device and the BeiDou command unit. The proportion of each module that successfully transmits instructions without errors is counted to quantitatively evaluate the reliability of the channel. Finally, the channel with higher accuracy is selected as the sole link for subsequent instruction transmission.

[0114] The method provided in this embodiment improves the reliability and accuracy of terminal control command reception through dual-channel collaboration between 5G-A broadband access equipment and Beidou command unit. Specifically, the terminal simultaneously receives control commands sent by the backend server through both modules, ensuring command consistency through comparison and verification to avoid command errors caused by single-channel interference. If inconsistencies are detected, a retransmission mechanism is triggered. If the error persists within a preset number of attempts, the channel accuracy is tested, and the channel with the higher accuracy is selected as the communication channel, forming a closed loop of dual-channel verification-retransmission error correction-dynamic optimization. This mechanism utilizes dual-channel redundancy to ensure command transmission stability and enhances anti-interference capabilities in complex environments through dynamic channel adaptation, providing reliable command support for the terminal to execute core processes such as sea clutter data acquisition and polarization mode switching, ensuring the accuracy and continuity of command execution in maritime monitoring and other scenarios.

[0115] Please continue to refer to Figure 2This application also provides a sea clutter testing radar system, which includes a display and control terminal, a transmission channel unit, a phased array unit, a target identification unit, a sea clutter analysis unit, and a communication unit; wherein,

[0116] The communication unit is used to acquire sea state information at the current test point;

[0117] The display and control terminal is used to control the transmission channel unit and the phased array unit to perform beam staring in each polarization mode, using the highest distance resolution as the alternative distance resolution, so that the phased array unit returns the intermediate frequency signal during the beam staring process.

[0118] The target recognition unit is used to perform signal processing on the intermediate frequency signal according to the first type of parameters corresponding to the candidate distance resolution to obtain the target recognition result;

[0119] The sea clutter analysis unit is used to perform sea clutter characteristic analysis on the intermediate frequency signal according to the second type of parameters corresponding to the alternative distance resolution, and obtain sea clutter characteristic information.

[0120] The display and control terminal is also used to determine whether the candidate range resolution matches the sea state information based on the target recognition result and sea clutter feature information. When the candidate range resolution matches the sea state information, the currently acquired sea clutter data is determined as the preferred sea clutter data. When the candidate range resolution does not match the sea state information and the candidate range resolution is not the lowest range resolution, the next highest range resolution after the candidate range resolution is taken as the candidate range resolution, and the transmission channel unit and phased array unit are controlled to perform beam staring again. When the candidate range resolution does not match the sea state information and the candidate range resolution is the lowest range resolution, the currently acquired sea clutter data is determined as the preferred sea clutter data.

[0121] The display and control terminal has functions such as parameter configuration management, environmental information acquisition, detection result acquisition and display, sea clutter characteristic analysis result acquisition and display, sea clutter acquisition mode setting, and reporting the overall radar operating status. The display and control terminal can receive system parameter configuration management commands (radar waveform parameters and operating modes, 5G-A broadband access equipment and Beidou command unit operating mode settings, etc.) through the terminal software interface, or receive system parameter configuration management commands sent from the background online through the communication unit. After receiving the system parameter configuration management commands, the display and control terminal needs to set the operating parameters and operating modes of the transmission channel unit, phased array unit, target identification unit, and sea clutter analysis unit.

[0122] Please continue to refer to Figure 2 It is understood that the sea clutter test radar system also includes a large-capacity storage unit for storing relevant data, such as preferred sea clutter data.

[0123] Optionally, the communication unit includes a 5G-A broadband access device and a BeiDou command and control unit; the display and control terminal is further used for:

[0124] The first control command is received through the 5G-A broadband access device, and the second control command is received through the Beidou command unit; the first control command and the second control command are control commands sent simultaneously by the backend server to the 5G-A broadband access device and the Beidou command unit.

[0125] The first control command and the second control command are compared and verified.

[0126] If the comparison and verification results of the first control instruction and the second control instruction are consistent, execute either the first control instruction or the second control instruction.

[0127] If the comparison and verification results of the first control command and the second control command are inconsistent, the backend server is requested to resend the control command and compare the first control command received through the 5G-A broadband access device with the second control command received through the Beidou command unit again.

[0128] If the comparison and verification results of the 5G-A broadband access device and the Beidou command unit are still inconsistent within a preset number of times, channel communication accuracy tests are performed on the channels corresponding to the 5G-A broadband access device and the Beidou command unit respectively, and the channel with high communication accuracy is selected based on the test results to receive instructions from the backend server.

[0129] Optionally, the sea clutter test radar system supports multiple range resolutions, each range resolution being associated with a set of configuration parameters. The set of configuration parameters includes configuration parameters corresponding to the transmission channel unit, configuration parameters corresponding to the phased array unit, first-type parameters corresponding to the target identification unit, and second-type parameters corresponding to the sea clutter analysis unit.

[0130] Optionally, the 5G-A broadband access device is also specifically used to transmit the working status, current configuration parameters, and preferred sea clutter data of the sea clutter test radar system back to the backend server as a set of data under unattended conditions.

[0131] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A sea clutter data acquisition method, characterized by, The method is applied to a sea clutter test radar system, and the method comprises: Obtaining sea state information of a current test point; In each polarization mode, taking the highest range resolution as a candidate range resolution, controlling a transmitting channel unit and a phased array unit to perform beam staring, so that the phased array unit returns an intermediate frequency signal in the process of beam staring; According to a first type of parameter corresponding to the candidate range resolution, performing signal processing on the intermediate frequency signal to obtain a target recognition result, and according to a second type of parameter corresponding to the candidate range resolution, performing sea clutter feature analysis on the intermediate frequency signal to obtain sea clutter feature information; Determining whether the candidate range resolution matches the sea state information according to the target recognition result and the sea clutter feature information; When the candidate range resolution matches the sea state information, determining the currently collected sea clutter data as preferred sea clutter data under the sea state information; When the candidate range resolution does not match the sea state information, and the candidate range resolution is not the lowest range resolution, taking the next highest range resolution after the candidate range resolution as a new candidate range resolution, and controlling the transmitting channel unit and the phased array unit to perform beam staring again; When the candidate range resolution does not match the sea state information, and the candidate range resolution is the lowest range resolution, determining the currently collected sea clutter data as preferred sea clutter data under the sea state information.

2. The method of claim 1, wherein, The communication unit in the sea clutter test radar system comprises a 5G-A broadband access device and a Beidou command machine unit; the method further comprises: Receiving a first control instruction through the 5G-A broadband access device and a second control instruction through the Beidou command machine unit; the first control instruction and the second control instruction are control instructions sent by a background server to the 5G-A broadband access device and the Beidou command machine unit at the same time; Comparing and checking the first control instruction and the second control instruction; When the comparison and checking result of the first control instruction and the second control instruction is consistent, executing any one of the first control instruction or the second control instruction; When the comparison and checking result of the first control instruction and the second control instruction is inconsistent, requesting the background server to resend a control instruction, and comparing and checking the first control instruction received through the 5G-A broadband access device and the second control instruction received through the Beidou command machine unit again; When the comparison and checking result of the 5G-A broadband access device and the Beidou command machine unit is still inconsistent within a preset number of times, testing the channel communication accuracy of the channels corresponding to the 5G-A broadband access device and the Beidou command machine unit respectively, and selecting a channel with high communication accuracy based on the test result to receive instructions from the background server.

3. The method of claim 1, wherein, The determination of whether the candidate range resolution matches the sea state information according to the target recognition result and the sea clutter feature information comprises: Determining whether there is a sea spike according to the sea clutter feature information to obtain a sea spike discrimination result; When the sea spike discrimination result represents no sea spike, it is determined that the candidate range resolution matches the sea state information. when the sea spike discrimination result indicates that the sea spike exists and the target recognition result indicates that no target is recognized, determining that the candidate distance resolution matches the sea state information; when the sea spike discrimination result indicates that the sea spike exists and the target recognition result indicates that a target is recognized, and when the sea spike discrimination result and the target recognition result still indicate that the sea spike and the target exist after a preset time length, determining that the candidate distance resolution does not match the sea state information, or otherwise determining that the candidate distance resolution matches the sea state information.

4. The method of claim 1, wherein, According to the first type of parameters corresponding to the candidate distance resolution, the intermediate frequency signal is processed to obtain a target recognition result, including: signal acquisition on the intermediate frequency signal, first down-conversion processing on the acquired digital signal to obtain a first down-conversion processing signal; first digital pulse compression processing on the first down-conversion processing signal to obtain a first pulse compression signal; sequential moving target detection, constant false alarm detection and point track processing on the first pulse compression signal to obtain the target recognition result; When the distance resolution changes, the parameters that need to be changed in the first type of parameters include the bandwidth and pulse width corresponding to the first down-conversion processing, the bandwidth and pulse width corresponding to the first digital pulse compression processing, and the point track condensation distance threshold and point track filtering threshold used in the point track processing.

5. The method of claim 1, wherein, According to the second type of parameters corresponding to the candidate distance resolution, sea clutter feature analysis is performed on the intermediate frequency signal to obtain sea clutter feature information, including: signal acquisition on the intermediate frequency signal, second down-conversion processing on the acquired digital signal to obtain a second down-conversion processing signal; second digital pulse compression processing on the second down-conversion processing signal to obtain a second pulse compression signal; extracting time domain features and frequency domain features of the second pulse compression signal, and determining the time domain features and the frequency domain features as the sea clutter feature information under the candidate distance resolution; When the distance resolution changes, the parameters that need to be changed in the second type of parameters include the bandwidth and pulse width corresponding to the second down-conversion processing, and the bandwidth and pulse width corresponding to the second digital pulse compression processing.

6. The method of claim 2, wherein, The sea state information of the current test point is obtained, including: receiving sea wave information sent by a buoy at the current test point through the Beidou command machine unit, and generating sea state information based on the sea wave information; and / or, receiving sea state information sent by the background server through the 5G-A wideband access device; wherein the background server obtains the sea state information at the current test point from a third party device.

7. The method of claim 2, wherein, The method further includes: returning the current working state, the current configuration parameters and the preferred sea clutter data of the sea clutter test radar system to the background server as a group of data through the 5G-A wideband access device.

8. A sea clutter test radar system, characterized by The sea clutter test radar system includes a display control terminal, a transmission channel unit, a phased array unit, a target recognition unit, a sea clutter analysis unit and a communication unit; the communication unit is configured to obtain sea state information of a current test point; The display control terminal is configured to control the transmitting channel unit and the phased array unit to perform beam steering in each polarization mode, with the highest range resolution as an alternative range resolution, so that the phased array unit returns an intermediate frequency signal in the process of beam steering. The target identification unit is configured to perform signal processing on the intermediate frequency signal according to the first type of parameters corresponding to the alternative range resolution, to obtain a target identification result. The sea clutter analysis unit is configured to perform sea clutter characteristic analysis on the intermediate frequency signal according to the second type of parameters corresponding to the alternative range resolution, to obtain sea clutter characteristic information. The display control terminal is further configured to determine whether the alternative range resolution matches the sea state information according to the target identification result and the sea clutter characteristic information, and determine the currently collected sea clutter data as preferred sea clutter data when the alternative range resolution matches the sea state information. When the alternative range resolution does not match the sea state information and the alternative range resolution is not the lowest range resolution, the next highest range resolution after the alternative range resolution is taken as an alternative range resolution, and the transmitting channel unit and the phased array unit are controlled to perform beam steering again. When the alternative range resolution does not match the sea state information and the alternative range resolution is the lowest range resolution, the currently collected sea clutter data is determined as preferred sea clutter data.

9. The sea clutter test radar system of claim 8, wherein, The communication unit includes a 5G-A broadband access device and a Beidou command machine unit; and the display control terminal is specifically further configured to: receive a first control instruction through the 5G-A broadband access device and a second control instruction through the Beidou command machine unit; the first control instruction and the second control instruction are control instructions sent by a background server to the 5G-A broadband access device and the Beidou command machine unit at the same time; perform comparison and verification on the first control instruction and the second control instruction; when the comparison and verification results of the first control instruction and the second control instruction are consistent, execute any one of the first control instruction or the second control instruction; when the comparison and verification results of the first control instruction and the second control instruction are inconsistent, request the background server to resend the control instruction, and again compare the first control instruction received through the 5G-A broadband access device with the second control instruction received through the Beidou command machine unit; when the comparison and verification results of the 5G-A broadband access device and the Beidou command machine unit are still inconsistent within a preset number of times, test the channel communication accuracy of the channels corresponding to the 5G-A broadband access device and the Beidou command machine unit respectively, and select a channel with high communication accuracy based on the test results to receive instructions from the background server.

10. The sea clutter test radar system of claim 9, wherein, The sea clutter test radar system supports multiple range resolutions, and each range resolution is associated with a set of configuration parameters, including configuration parameters corresponding to the transmitting channel unit, configuration parameters corresponding to the phased array unit, first type of parameters corresponding to the target identification unit, and second type of parameters corresponding to the sea clutter analysis unit.

11. The sea clutter test radar system of claim 10, wherein, The 5G-A broadband access device is also specifically configured to return the working state, current configuration parameters and the preferred sea clutter data of the sea clutter test radar system to the background server as a set of data under unattended conditions.

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