CN111624569A - Radar signal processing device - Google Patents
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- CN111624569A CN111624569A CN202010348099.XA CN202010348099A CN111624569A CN 111624569 A CN111624569 A CN 111624569A CN 202010348099 A CN202010348099 A CN 202010348099A CN 111624569 A CN111624569 A CN 111624569A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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Abstract
The present disclosure provides a radar signal processing apparatus, including: the interface conversion circuit receives the radar echo signal; the threshold circuit is connected with the interface conversion circuit and is used for threshold processing of the radar echo signal based on a threshold range; the analog-digital conversion circuit is connected with the threshold circuit, the threshold circuit sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit, and the analog-digital conversion circuit converts the radar echo signal into a digital echo signal; and the processing device receives the digital echo signals converted by the analog-digital conversion circuit, extracts moving target signals from the digital echo signals, obtains the moving target signals, and automatically identifies the target types.
Description
Technical Field
The disclosure belongs to the technical field of low-small slow target radar detection, and particularly relates to a radar signal processing device.
Background
The target has the advantages of low altitude, low slow speed, small flying target, low flying height of below 1000 m, slow speed, small radar reflection area, difficult discovery, capture, disposal and handling, and great threat to air defense safety of important targets.
In the prior art, in order to solve the threat monitoring problem of low and small slow targets, a detection and processing system for the low and small slow targets is the core of the low and small slow monitoring system, if accurate low and small slow target signals cannot be obtained, the low and small slow targets cannot be found and early warned, and more activities (low-altitude security, civil and military airports and the like) urgently need to introduce low and small slow detection radars for monitoring and early warning.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a radar signal processing apparatus, which is particularly suitable for processing radar signals of low and small slow targets.
The radar signal processing device of the present disclosure is realized by the following technical solutions.
A radar signal processing apparatus according to at least one embodiment of the present disclosure includes: the interface conversion circuit receives the radar echo signal; the threshold circuit is connected with the interface conversion circuit and is used for threshold processing of the radar echo signal based on a threshold range; the analog-digital conversion circuit is connected with the threshold circuit, the threshold circuit sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit, and the analog-digital conversion circuit converts the radar echo signal into a digital echo signal; and the processing device receives the digital echo signals converted by the analog-digital conversion circuit, and extracts moving target signals from the digital echo signals to obtain moving target signals.
According to the radar signal processing device of at least one embodiment of the present disclosure, the processing device further performs target feature extraction on the moving target signal.
According to the radar signal processing device of at least one embodiment of the present disclosure, the processing device includes a signal extraction module, and the signal extraction module is configured to extract a moving target signal from a digital echo signal to obtain a moving target signal.
According to the radar signal processing device of at least one embodiment of the present disclosure, the processing device comprises a feature extraction module, and the feature extraction module performs target feature extraction on a moving target signal.
According to the radar signal processing device of at least one embodiment of the present disclosure, the interface conversion circuit includes at least two input channels, and the processing device includes a bus controller that configures the interface conversion circuit such that when one of the at least two input channels is abnormal, the other of the at least two input channels is enabled.
According to a radar signal processing apparatus of at least one embodiment of the present disclosure, an interface conversion circuit includes two input channels.
According to the radar signal processing device of at least one embodiment of the present disclosure, the processing device configures the threshold range of the threshold circuit based on the radar usage environment parameter.
According to the radar signal processing device of at least one embodiment of the present disclosure, the processing device analyzes the target features of the extracted moving target signal, compares the target features with the target features in the target feature model, and determines the target type.
According to the radar signal processing device of at least one embodiment of the present disclosure, the processing device includes an analysis module and a memory, wherein the analysis module analyzes a target feature of an extracted moving target signal, and compares the target feature with a target feature in a target feature model to determine a target type; the memory is used for storing the target characteristic model.
The radar signal processing apparatus according to at least one embodiment of the present disclosure further includes a display control apparatus, and the processing apparatus transmits the determined target type to the display control apparatus.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a block diagram of a radar signal processing apparatus according to an embodiment of the present disclosure.
Fig. 2 is a block diagram of a radar signal processing apparatus according to still another embodiment of the present disclosure.
Fig. 3 is a block diagram of a radar signal processing apparatus according to yet another embodiment of the present disclosure.
Fig. 4 is a block diagram of a radar signal processing apparatus according to yet another embodiment of the present disclosure.
Fig. 5 is a block diagram of a radar signal processing apparatus according to yet another embodiment of the present disclosure.
Description of the reference numerals
100 radar signal processing device
101 interface conversion circuit
102 threshold circuit
103 analog-to-digital conversion circuit
104 processing device
1041 bus controller
1042 signal extraction module
1043 feature extraction module
1044 analytic module
1045 memory
105 display control means.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., "in the sidewall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.
Fig. 1 is a block diagram of a radar signal processing apparatus 100 according to an embodiment of the present disclosure.
As shown in fig. 1, the radar signal processing apparatus 100 includes: the interface conversion circuit 101, the interface conversion circuit 101 receives the radar echo signal; the threshold circuit 102 is connected with the interface conversion circuit 101, and the threshold circuit 102 performs threshold processing on the radar echo signal based on a threshold range; the analog-digital conversion circuit 103 is connected with the threshold circuit 102, the threshold circuit 102 sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit 103, and the analog-digital conversion circuit 103 converts the radar echo signal into a digital echo signal; and a processing device 104, wherein the processing device 104 receives the digital echo signal converted by the analog-to-digital conversion circuit 103, and the processing device 104 extracts the moving target signal from the digital echo signal to obtain the moving target signal.
The processing device 104 preferably uses a programmable logic device, such as a single chip microcomputer of FPGA, CPLD, or DSP.
The threshold range can be adjusted, and small target signals can be effectively monitored and received through setting of the threshold range.
According to a preferred embodiment of the present disclosure, the processing device 104 of the radar signal processing device 100 further performs target feature extraction on the moving target signal.
It will be understood by those skilled in the art that the above-mentioned target features, i.e., data related to the target extracted from the echo signal, include, but are not limited to, echo intensity information of the target, position information of the target, velocity information of the target, etc.
Targets are for example birds, drones, etc.
The radar signal processing device disclosed rejects clutter such as fixed ground feature and trees in complicated geographical environment, realizes moving target signal extraction operation, carries out corresponding screening and judgement according to the signal characteristic of small-object simultaneously, and the small-object signal that will not accord with the low little slow radar system required is abandoned slowly.
Preferably, the processing device 104 configures the threshold range of the threshold circuit 102 based on the radar usage environment parameter.
Fig. 2 is a block diagram of a radar signal processing apparatus 100 according to still another embodiment of the present disclosure.
As shown in fig. 2, the radar signal processing apparatus 100 includes: the interface conversion circuit 101, the interface conversion circuit 101 receives the radar echo signal; the threshold circuit 102 is connected with the interface conversion circuit 101, and the threshold circuit 102 performs threshold processing on the radar echo signal based on a threshold range; the analog-digital conversion circuit 103 is connected with the threshold circuit 102, the threshold circuit 102 sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit 103, and the analog-digital conversion circuit 103 converts the radar echo signal into a digital echo signal; and a processing device 104, wherein the processing device 104 receives the digital echo signal converted by the analog-to-digital conversion circuit 103, and the processing device 104 extracts the moving target signal from the digital echo signal to obtain the moving target signal.
The interface conversion circuit 101 includes at least two input channels, the processing device 104 includes a bus controller 1041, and the bus controller 1041 configures the interface conversion circuit 101 so that one of the at least two input channels is abnormal, and another of the at least two input channels is enabled.
Preferably, the interface conversion circuit 101 includes two input channels.
Fig. 3 is a block diagram of a radar signal processing apparatus 100 according to still another embodiment of the present disclosure.
As shown in fig. 3, the radar signal processing apparatus 100 includes: the interface conversion circuit 101, the interface conversion circuit 101 receives the radar echo signal; the threshold circuit 102 is connected with the interface conversion circuit 101, and the threshold circuit 102 performs threshold processing on the radar echo signal based on a threshold range; the analog-digital conversion circuit 103 is connected with the threshold circuit 102, the threshold circuit 102 sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit 103, and the analog-digital conversion circuit 103 converts the radar echo signal into a digital echo signal; and a processing device 104, wherein the processing device 104 receives the digital echo signal converted by the analog-to-digital conversion circuit 103, and the processing device 104 extracts the moving target signal from the digital echo signal to obtain the moving target signal.
The interface conversion circuit 101 includes at least two input channels, the processing device 104 includes a bus controller 1041, and the bus controller 1041 configures the interface conversion circuit 101 such that when one of the at least two input channels is abnormal, another of the at least two input channels is enabled.
The processing device 104 further includes a signal extracting module 1042, where the signal extracting module 1042 is configured to extract a moving target signal from the digital echo signal to obtain the moving target signal.
In this embodiment, the small target signal is first locked by the threshold circuit 102, and then the moving target signal is extracted by the signal extraction module 1042.
Fig. 4 is a block diagram of a radar signal processing apparatus 100 according to still another embodiment of the present disclosure.
As shown in fig. 4, the radar signal processing apparatus 100 includes: the interface conversion circuit 101, the interface conversion circuit 101 receives the radar echo signal; the threshold circuit 102 is connected with the interface conversion circuit 101, and the threshold circuit 102 performs threshold processing on the radar echo signal based on a threshold range; the analog-digital conversion circuit 103 is connected with the threshold circuit 102, the threshold circuit 102 sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit 103, and the analog-digital conversion circuit 103 converts the radar echo signal into a digital echo signal; and a processing device 104, wherein the processing device 104 receives the digital echo signal converted by the analog-to-digital conversion circuit 103, and the processing device 104 extracts the moving target signal from the digital echo signal to obtain the moving target signal.
The interface conversion circuit 101 includes at least two input channels, the processing device 104 includes a bus controller 1041, and the bus controller 1041 configures the interface conversion circuit 101 such that when one of the at least two input channels is abnormal, another of the at least two input channels is enabled.
The processing device 104 further includes a signal extracting module 1042, where the signal extracting module 1042 is configured to extract a moving target signal from the digital echo signal to obtain the moving target signal.
The processing device 104 includes a feature extraction module 1043, and the feature extraction module 1043 performs target feature extraction on the moving target signal extracted by the signal extraction module 1042.
Preferably, the processing device 104 analyzes the target feature of the extracted moving target signal, compares the target feature with the target feature in the target feature model, and determines the target type.
Preferably, the processing device 104 includes an analyzing module 1044 and a storage 1045, the analyzing module 1044 analyzes the target feature of the extracted moving target signal, and compares the target feature with the target feature in the target feature model to determine the target type; the memory 1045 is used for storing a target feature model.
Fig. 5 is a block diagram of a radar signal processing apparatus 100 according to still another embodiment of the present disclosure.
As shown in fig. 5, the radar signal processing apparatus 100 includes: the interface conversion circuit 101, the interface conversion circuit 101 receives the radar echo signal; the threshold circuit 102 is connected with the interface conversion circuit 101, and the threshold circuit 102 performs threshold processing on the radar echo signal based on a threshold range; the analog-digital conversion circuit 103 is connected with the threshold circuit 102, the threshold circuit 102 sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit 103, and the analog-digital conversion circuit 103 converts the radar echo signal into a digital echo signal; and a processing device 104, wherein the processing device 104 receives the digital echo signal converted by the analog-to-digital conversion circuit 103, and the processing device 104 extracts the moving target signal from the digital echo signal to obtain the moving target signal.
The interface conversion circuit 101 includes at least two input channels, the processing device 104 includes a bus controller 1041, and the bus controller 1041 configures the interface conversion circuit 101 such that when one of the at least two input channels is abnormal, another of the at least two input channels is enabled.
The processing device 104 further includes a signal extracting module 1042, where the signal extracting module 1042 is configured to extract a moving target signal from the digital echo signal to obtain the moving target signal.
The processing device 104 includes a feature extraction module 1043, and the feature extraction module 1043 performs target feature extraction on the moving target signal extracted by the signal extraction module 1042.
The processing device 104 analyzes the extracted target features of the moving target signals, compares the target features with the target features in the target feature model, and determines the target type.
The processing device 104 includes an analysis module 1044 and a storage 1045, the analysis module 1044 analyzes the target feature of the extracted moving target signal, and compares the target feature with the target feature in the target feature model to determine the target type; the memory 1045 is used for storing a target feature model.
The radar signal processing apparatus 100 further includes a display control means 105, and the processing means 104 transmits the determined target type to the display control means 105.
According to the preferred embodiment of the present disclosure, the analyzing module 1044 analyzes the target feature of the extracted moving target signal and compares the target feature with the target feature in the target feature model, and if the target feature does not exist in the target feature model, the analyzing module 1044 writes the target feature into the target feature model.
The radar signal processing device adopts parameters such as the flying speed, the flying height, the flying attitude, the radar reflection sectional area strength (RCS) and the like of a target (such as an unmanned aerial vehicle) when an embedded code is used for establishing a target characteristic model, the embedded code is integrally packaged when written, a data query interface, a query address and an embedded program upgrading interface are reserved, the radar is convenient to analyze the target characteristics input by the radar signal processing device in real time and give clear target type identification and indication data when the radar works, the target characteristics can be directly output to a display control device to be displayed, and the decision of a user can be effectively guided through the displayed target types and corresponding symbols.
Preferably, the radar signal processing device disclosed by the invention uses parameters fed back by a target in a radar echo signal to establish a model, and the model is embedded into the processing device (preferably a programmable logic device) in a machine coding mode, so that the radar signal processing device disclosed by the invention automatically judges the characteristics and the category of the low and slow small target, solves the problem that the traditional radar system assisted by a photoelectric system is used for identifying the type of the target, greatly improves the all-weather duty and automatic target identification capability of the radar system, simultaneously reduces the development cost of the identification target of the radar combined with the photoelectric system, and has important significance in meeting the monitoring, early warning and precaution of the low and slow small targets in the fields of airport bird defense, public security and the like.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A radar signal processing apparatus, comprising:
the interface conversion circuit receives a radar echo signal;
the threshold circuit is connected with the interface conversion circuit and is used for carrying out threshold processing on the radar echo signal based on a threshold range;
the analog-digital conversion circuit is connected with the threshold circuit, the threshold circuit sends the radar echo signal subjected to threshold processing to the analog-digital conversion circuit, and the analog-digital conversion circuit converts the radar echo signal into a digital echo signal; and
and the processing device receives the digital echo signal converted by the analog-digital conversion circuit, and extracts a moving target signal from the digital echo signal to obtain the moving target signal.
2. The radar signal processing apparatus of claim 1, wherein the processing apparatus further performs target feature extraction on the moving target signal.
3. The radar signal processing apparatus according to claim 1 or 2, wherein the processing apparatus comprises a signal extraction module, and the signal extraction module is configured to perform moving-target signal extraction on the digital echo signal to obtain a moving-target signal.
4. The radar signal processing apparatus of claim 2, wherein the processing apparatus comprises a feature extraction module that performs target feature extraction on the moving target signal.
5. The radar signal processing apparatus of claim 1, wherein the interface conversion circuit includes at least two input channels, and wherein the processing apparatus includes a bus controller that configures the interface conversion circuit such that when one of the at least two input channels is abnormal, another of the at least two input channels is enabled.
6. The radar signal processing apparatus of claim 1, wherein the interface conversion circuit includes two input channels.
7. The radar signal processing apparatus of claim 1, wherein the processing apparatus configures the threshold range of the threshold circuit based on a radar usage environment parameter.
8. The radar signal processing apparatus of claim 2, wherein the processing apparatus analyzes the target feature of the extracted moving target signal, compares the target feature with a target feature in a target feature model, and determines the target type.
9. The radar signal processing device according to claim 8, wherein the processing device comprises an analysis module and a memory, the analysis module analyzes the target features of the extracted moving target signals and compares the target features with the target features in the target feature model to determine the target type; the memory is used for storing the target feature model.
10. The radar signal processing apparatus of claim 8, further comprising a display control means, wherein the processing means sends the determined target type to the display control means.
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Application publication date: 20200904 |