Anti-interference radar detection device

Abstract

The utility model belongs to the technical field of radar detection, and particularly relates to an anti-interference radar detection device. Comprising a radar transmitter used for transmitting a radar signal; the radar receiver is used for receiving a radar signal reflected from the target object; the signal processing unit is used for performing Doppler processing on the received radar signal; the signal processing unit comprises a false alarm processing module used for reducing false alarms caused by interference; wherein the Doppler processing comprises the steps of decomposing a radar signal into frequency spectrum components and identifying and tracking Doppler frequency shift of a target object, and the signal processing unit identifies and distinguishes motion characteristics of the target object according to the Doppler frequency shift and eliminates or reduces the influence of external interference on a radar system. The anti-interference radar detection device provided by the utility model can improve the performance of a radar, reduce false alarm and missing alarm, and improve the accuracy of target detection and tracking.

Description

Technical Field

[0001] This utility model belongs to the field of radar detection technology, and in particular relates to an anti-interference radar detection device. Background Technology

[0002] Traditional radar systems are susceptible to external interference when facing complex electromagnetic environments.

[0003] Utility model patent with publication number CN207895065U discloses a radar signal receiving anti-interference device, including a signal receiving unit and a signal processing unit fixedly connected to the receiving unit. The signal processing unit includes an input terminal for receiving signals, a signal mixing terminal connected to the signal input terminal, a primary filtering terminal for primary filtering, an auxiliary detection segment and a main receiving segment where the primary filtered signal is output in two segments. The main receiving segment signal is sequentially output to a detector delay controller for amplitude modulation and demodulation, an instantaneous automatic gain controller and the receiving terminal. The auxiliary detection segment signal is sequentially output to a linear logarithmic detection controller for amplitude detection and judgment, a frequency converter and a logarithmic detection output device. The control signal output by the logarithmic detection output device is transmitted to the instantaneous automatic gain controller of the main receiving segment.

[0004] While this technology can effectively resist saturation overload to ensure the radar's surveillance function, it cannot improve the radar system's performance in complex environments, making it prone to false alarms or missed alarms, thus reducing the radar's reliability and accuracy. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing an anti-jamming radar detection device that can improve radar performance, reduce false alarms and missed alarms, and enhance the accuracy of target detection and tracking.

[0006] In view of this, the present invention provides an anti-interference radar detection device, comprising:

[0007] A radar transmitter used to send radar signals;

[0008] A radar receiver is used to receive radar signals reflected back from a target object.

[0009] The signal processing unit is used to perform Doppler processing on the received radar signals;

[0010] The signal processing unit includes:

[0011] The false alarm handling module is used to reduce false alarms caused by interference;

[0012] The Doppler processing includes decomposing the radar signal into spectral components and identifying and tracking the Doppler frequency shift of the target object. The signal processing unit identifies and distinguishes the motion characteristics of the target object based on the Doppler frequency shift and eliminates or reduces the impact of external interference on the radar system.

[0013] In the above technical solution, the signal processing unit further employs digital signal processing technology to perform Doppler processing.

[0014] In any of the above technical solutions, the signal processing unit further includes an adaptive filter for suppressing interference signals.

[0015] In any of the above technical solutions, the radar receiver further includes at least one receiving antenna for receiving radar signals reflected back from the target object.

[0016] In any of the above technical solutions, the signal processing unit further includes a frequency diversity module for processing radar signals in different frequency bands to reduce the impact of co-channel interference.

[0017] In any of the above technical solutions, an automatic adjustment module is further included to monitor the interference in the environment in real time and automatically adjust the operating parameters of the radar system. The automatic adjustment module is electrically connected to the signal processing unit.

[0018] The beneficial effects of this utility model are:

[0019] 1. By performing Doppler processing on the received radar signals, the signal processing unit can determine the motion state and speed of the target object. Based on the analysis of Doppler frequency shift, the signal processing unit can identify and distinguish the motion characteristics of the target object, such as speed and direction. According to the identified motion characteristics of the target object, the signal processing unit can eliminate or reduce the impact of external interference on the radar system. This anti-interference radar detection device can effectively identify target objects and eliminate external interference, thereby improving the performance and reliability of the radar system.

[0020] 2. Through the operation of the false alarm processing module, the anti-interference radar detection device can effectively reduce false alarms caused by interference, improve the reliability and practicality of the system, and make it more suitable for target detection and tracking in complex electromagnetic environments.

[0021] 3. By performing Doppler processing through digital signal processing technology, this radar system can more accurately identify the motion characteristics of target objects and effectively resist external interference, thereby improving the system's anti-interference capability and detection performance.

[0022] 4. By using adaptive filters, anti-jamming radar detection devices can effectively suppress interference signals, improve the detection performance and reliability of target signals, and thus achieve more accurate and reliable target detection and tracking.

[0023] 5. By receiving radar signals reflected back from the target object through the receiving antenna and processing them through the signal processing unit, this anti-jamming radar detection device can achieve accurate detection and tracking of the target, and has strong anti-jamming capability, making it suitable for complex electromagnetic environments.

[0024] 6. Through the operation of the automatic adjustment module, the anti-jamming radar detection device can achieve automated parameter optimization in complex and ever-changing environments, improving the anti-jamming capability and practicality of the radar system, and ensuring its reliability and performance under various conditions. Attached Figure Description

[0025] Figure 1 This is a system framework diagram of this utility model;

[0026] The attached diagram is labeled as follows: 1. Radar transmitter; 2. Radar receiver; 3. Signal processing unit; 31. False alarm processing module; 4. Adaptive filter; 5. Receiving antenna; 6. Frequency diversity module; 7. Automatic adjustment module. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] Example 1:

[0030] like Figure 1 As shown, this embodiment provides an anti-jamming radar detection device, including:

[0031] Radar transmitter 1, used to transmit radar signals;

[0032] Radar receiver 2 is used to receive radar signals reflected back from the target object;

[0033] Signal processing unit 3 is used to perform Doppler processing on the received radar signals;

[0034] The signal processing unit 3 includes:

[0035] False alarm processing module 31 is used to reduce false alarms caused by interference;

[0036] The Doppler processing includes decomposing the radar signal into spectral components and identifying and tracking the Doppler frequency shift of the target object. The signal processing unit 3 identifies and distinguishes the motion characteristics of the target object based on the Doppler frequency shift and eliminates or reduces the impact of external interference on the radar system.

[0037] In this technical solution, firstly, radar transmitter 1 sends a series of radar signals. These signals are reflected back by the target object and received by radar receiver 2. The received radar signals are then processed by signal processing unit 3, where they undergo Doppler processing. During this processing, the radar signals are decomposed into spectral components, which contain the Doppler frequency shift information of the target object. Signal processing unit 3 identifies and tracks the Doppler frequency shift in the spectral components. The Doppler frequency shift is a frequency change caused by the motion of the target object relative to the radar system. By analyzing these Doppler frequency shifts, the motion state and speed of the target object can be determined. Based on the analysis of the Doppler frequency shift, signal processing unit 3 identifies and distinguishes the motion characteristics of the target object, such as speed and direction. According to the identified motion characteristics of the target object, signal processing unit 3 can eliminate or reduce the impact of external interference on the radar system. For example, by comparing the characteristics of interference signals, signals that do not conform to the motion characteristics of the target object can be eliminated, thereby improving the anti-interference capability of the system. This anti-interference radar detection device can effectively identify target objects and eliminate external interference, improving the performance and reliability of the radar system.

[0038] Furthermore, the false alarm processing module 31 monitors and analyzes the received radar signals to identify the presence of interference signals. Based on preset judgment criteria and algorithms, the module 31 determines whether the identified potential interference signals are likely to cause false alarms. These judgment criteria may include signal strength thresholds, duration, and spectral characteristics. If an identified signal is determined to be interference that may cause false alarms, the module 31 takes corresponding filtering measures to reduce its impact on system performance. This may include temporarily blocking the signal, reducing its weight in signal processing, or excluding it from the target detection range. For signals determined to be likely to cause false alarms, the module 31 may further verify them to confirm whether they are indeed interference signals. This may include multiple detections of the signal, comparison with historical data, and correlation with data from other sensors. Based on the results of the false alarm processing, the system may provide corresponding feedback and optimization. If the false alarm rate remains high, the system may adjust the parameters of the false alarm processing module 31, optimize the interference identification algorithm, and improve the interference signal filtering strategy to further reduce the false alarm rate. Through the operation of the false alarm processing module 31, the anti-interference radar detection device can effectively reduce false alarms caused by interference, improve the reliability and practicality of the system, and make it more suitable for target detection and tracking in complex electromagnetic environments.

[0039] Example 2:

[0040] This embodiment provides an anti-jamming radar detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0041] like Figure 1 As shown, in this embodiment, the optimized signal processing unit 3 uses digital signal processing technology to perform Doppler processing.

[0042] In this technical solution, the received radar signal is first converted into a digital signal, which can be accomplished using an analog-to-digital converter (ADC). Digital signal processing technology enables the radar system to process signals in digital form, thereby achieving higher accuracy and flexibility. In the digital signal processing unit 3, the received digital radar signal undergoes Doppler processing, which includes time-domain and frequency-domain analysis of the signal to detect frequency changes caused by the target object. By using algorithms such as digital filters and Fourier transforms, the signal can be decomposed into components of different frequencies, and Doppler frequency shift information can be extracted from them. By performing spectral analysis on the signal, the Doppler frequency shift caused by the target object is identified and extracted. These frequency shifts correspond to the speed and direction of the target object. Based on the extracted Doppler frequency shift information, the signal processing unit 3 further analyzes and extracts the motion characteristics of the target object, such as speed and direction. These characteristics can help identify the target object and distinguish it from external interference. Based on the identification of the target object's motion characteristics, the signal processing unit 3 can take corresponding measures to suppress external interference. For example, by comparing the speed range of the target object, signals that do not meet the conditions are eliminated, thereby reducing the impact of external interference on system performance. By performing Doppler processing using digital signal processing technology, this radar system can more accurately identify the motion characteristics of target objects and effectively resist external interference, thereby improving the system's anti-interference capability and detection performance.

[0043] Example 3:

[0044] This embodiment provides an anti-jamming radar detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0045] like Figure 1 As shown, in this embodiment, the optimized signal processing unit 3 includes an adaptive filter 4 for suppressing interference signals.

[0046] In this technical solution, firstly, the radar system receives signals from the target object and potential interference signals. The received signals are fed into an adaptive filter 4. This filter is a special type of filter whose characteristics allow it to automatically adjust its filtering parameters based on the characteristics of the input signal, maximizing the suppression of interference signals while preserving the target signal. The adaptive filter 4 automatically adjusts its filtering parameters according to the input signal and preset optimization criteria (such as the minimum mean square error criterion). This adaptability allows the filter to adapt to changes in the signal under different environmental conditions, achieving optimal suppression of interference signals. The adaptive filter 4 processes the input signal based on its adjusted parameters to suppress interference signals. Typically, interference signals and target signals differ in certain characteristics, and the adaptive filter 4 can utilize these characteristics for effective separation and suppression. After suppressing the interference signal, the adaptive filter 4 enhances the strength and clarity of the target signal, making it easier to detect and identify. The adaptive filter 4 typically has real-time update capabilities, continuously adjusting its parameters based on the latest input signal information to adapt to changes in the signal environment. By using adaptive filter 4, the anti-jamming radar detection device can effectively suppress interference signals, improve the detection performance and reliability of target signals, and thus achieve more accurate and reliable target detection and tracking.

[0047] Example 4:

[0048] This embodiment provides an anti-jamming radar detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] like Figure 1 As shown, in this embodiment, the optimized radar receiver 2 includes at least one receiving antenna 5 for receiving radar signals reflected from the target object.

[0050] In this technical solution, the radar system receives radar signals reflected from a target object via at least one receiving antenna 5. These signals are microwave signals transmitted by the radar transmitter 1, which are reflected back after interacting with the target object. The receiving antenna 5 is specifically designed to receive radar signals, and its design takes into account factors such as reception efficiency, directivity, and frequency characteristics to ensure effective reception of signals reflected from the target object. The received radar signals are then sent to the signal processing unit 3 for processing after passing through the receiving antenna 5. In the signal processing unit 3, the received signals are amplified, filtered, and noise-removed to extract the target signal and minimize the influence of interference signals. After signal processing, the resulting signal is used for target identification and tracking. By analyzing the characteristics of the signal, such as the intensity, frequency, and phase of the reflected signal, the position, velocity, and other attribute information of the target object can be determined. Since the radar receiver 2 is designed for anti-interference, it can effectively suppress interference signals from external interference sources when receiving target signals. This may involve antenna design, signal processing algorithms, filters, and other technical means to ensure the reliability and stability of the system in complex electromagnetic environments. By receiving radar signals reflected back from the target object through receiving antenna 5 and processing them through signal processing unit 3, this anti-jamming radar detection device can accurately detect and track targets, while also possessing strong anti-jamming capabilities and being suitable for complex electromagnetic environments.

[0051] Example 5:

[0052] This embodiment provides an anti-jamming radar detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] like Figure 1 As shown, in this embodiment, the optimized signal processing unit 3 includes a frequency diversity module 6, which is used to process radar signals in different frequency bands to reduce the impact of co-channel interference.

[0054] In this technical solution, the frequency diversity module 6 processes the received radar signals on different frequency bands. This processing is typically achieved by rapidly switching between different frequencies. The frequency selection may be predetermined or dynamically adjusted based on real-time environmental conditions and system feedback. The frequency diversity module 6 selects multiple different frequency bands to process the radar signals. These frequency bands may be separated to cover a wider spectrum or overlap to process signals from multiple frequencies simultaneously. On each frequency band, the received radar signal is sent to the signal processing unit 3 for processing. This includes steps such as amplification, filtering, and noise removal to extract the target signal and reduce the impact of co-channel interference. The frequency diversity module 6 may employ different frequency switching strategies to minimize the impact of co-channel interference. This may involve periodically switching frequencies, intelligently selecting frequencies based on real-time environmental conditions, or dynamically adjusting the frequency switching strategy based on system feedback. Finally, the signals processed by each frequency band may be combined to obtain more comprehensive and accurate information about the target. This may involve fusing, weighting, or selecting the processing results from different frequency bands to achieve optimal detection and tracking performance. By processing radar signals on different frequency bands, the frequency diversity module 6 can effectively reduce the impact of co-channel interference, improve the system's anti-interference capability, and thus more reliably achieve target detection and tracking.

[0055] Example 6:

[0056] This embodiment provides an anti-jamming radar detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0057] like Figure 1 As shown, in this embodiment, the optimized version also includes an automatic adjustment module 7, which is used to monitor the interference in the environment in real time and automatically adjust the operating parameters of the radar system. The automatic adjustment module 7 is electrically connected to the signal processing unit 3.

[0058] In this technical solution, the automatic adjustment module 7 continuously monitors the environment in which the radar system operates, including factors such as electromagnetic interference, weather conditions, and terrain. This can be achieved through sensors, signal acquisition equipment, or built-in detection algorithms. Based on the collected environmental data, the automatic adjustment module 7 analyzes the interference in the environment. This may include identifying the type, intensity, and frequency characteristics of the interference source. According to the interference analysis results, the automatic adjustment module 7 adjusts the radar system's operating parameters accordingly to minimize the impact of interference on radar performance. These parameters may include radar transmit power, receive gain, and signal processing algorithm parameter settings. Based on the adjusted operating parameters, the system may monitor changes in radar performance in real time and collect feedback information. If the adjusted parameters effectively reduce the impact of interference on radar performance, the system will retain these parameter settings; if the effect is unsatisfactory, the parameters may be further optimized, or other measures may be taken to address the interference. The automatic adjustment module 7 may employ an adaptive control algorithm to continuously adjust the radar system's operating parameters based on real-time environmental conditions and system performance changes. This enables the system to maintain good performance in different environments, improving the system's stability and adaptability. Through the operation of the automatic adjustment module 7, the anti-jamming radar detection device can achieve automated parameter optimization in complex and ever-changing environments, improving the anti-jamming capability and practicality of the radar system, and ensuring its reliability and performance under various conditions.

[0059] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An anti-interference radar detection device, characterized in that, include: Radar transmitter (1), used to transmit radar signals; Radar receiver (2) is used to receive radar signals reflected back from the target object; The signal processing unit (3) is used to perform Doppler processing on the received radar signal; The signal processing unit (3) includes: The false alarm processing module (31) is used to reduce false alarms caused by interference; The Doppler processing includes decomposing the radar signal into spectral components and identifying and tracking the Doppler frequency shift of the target object. The signal processing unit (3) identifies and distinguishes the motion characteristics of the target object based on the Doppler frequency shift and eliminates or reduces the influence of external interference on the radar system.

2. The anti-interference radar detection device according to claim 1, characterized in that, The signal processing unit (3) uses digital signal processing technology to perform Doppler processing.

3. The anti-interference radar detection device according to claim 1, characterized in that, The signal processing unit (3) includes an adaptive filter (4) for suppressing interference signals.

4. The anti-interference radar detection device according to claim 1, characterized in that, The radar receiver (2) includes at least one receiving antenna (5) for receiving radar signals reflected from the target object.

5. The anti-interference radar detection device according to claim 1, characterized in that, The signal processing unit (3) includes a frequency diversity module (6) for processing radar signals in different frequency bands to reduce the impact of co-channel interference.

6. The anti-interference radar detection device according to claim 1, characterized in that, It also includes an automatic adjustment module (7) for real-time monitoring of interference in the environment and automatic adjustment of the radar system's operating parameters. The automatic adjustment module (7) is electrically connected to the signal processing unit (3).

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