CN212160077U - Anti-forwarding interference radar detector - Google Patents
Anti-forwarding interference radar detector Download PDFInfo
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- CN212160077U CN212160077U CN201921691123.9U CN201921691123U CN212160077U CN 212160077 U CN212160077 U CN 212160077U CN 201921691123 U CN201921691123 U CN 201921691123U CN 212160077 U CN212160077 U CN 212160077U
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Abstract
The utility model discloses an anti-forwarding interference radar detector, through the transmit channel who sets up and be connected with transmitting antenna and receiving antenna, the receive channel who is connected with receiving antenna and constitute radar detector. The signal processing chip and the oscillating circuit in the transmitting channel are used for processing and generating a linear frequency modulation continuous wave signal which belongs to a preset frequency range and is locked in phase, and the continuous wave signal is subjected to power division and then is radiated and transmitted by the transmitting antenna and transmitted to the analog-to-digital converter of the receiving channel. After receiving the corresponding reflected wave signal by the receiving antenna, the frequency mixer performs frequency mixing processing, the filter performs filtering processing, the analog-to-digital converter performs analog-to-digital conversion, and finally the processor analyzes and determines the ranging result. According to the technical scheme, the linear continuous wave signal with the preset phase and unchanged phase is used as the ranging signal, so that the interference information can be conveniently eliminated, and the technical effects of resisting forwarding interference and improving the ranging precision are achieved.
Description
Technical Field
The utility model relates to a wireless closely range finding technical field of millimeter wave especially relates to an anti-forwarding interference radar detector.
Background
The millimeter wave wireless ranging technology is a ranging method based on an electromagnetic wave application technology, namely, a wireless electromagnetic wave signal is adopted as a distance measuring tool in millimeter wave wireless ranging, and the realization principle is that the distance between a target obstacle and an emission point is calculated and judged based on the time difference, the frequency difference and the phase difference between the transmitted electromagnetic wave and the received refracted electromagnetic wave.
The repeater interference refers to interference which is transmitted after a received radar electromagnetic wave signal is copied (i.e. delayed, remodulated and amplified). In wartime, enemies often utilize the jammers to form forwarding type interference, and the normal work and the ranging accuracy of the radar detector are seriously influenced.
The performance of the anti-retransmission interference method of various radar near-field detectors (such as 24G radar near-field detector) in the prior art is not strong, and therefore, when the method is applied to some special condition conditions, the ideal ranging effect is often not achieved.
Therefore, the technical problem that the radar detector adopting the wireless ranging technology cannot normally work due to the fact that the radar detector is easily subjected to the forwarding interference caused by an interference machine in practical application exists in the prior art.
SUMMERY OF THE UTILITY MODEL
The application provides an anti-forwarding interference radar detector for solving the technical problem that a radar detector adopting a wireless ranging technology in the prior art is easily interfered by an enemy jammer in a forwarding mode and cannot work normally in practical application.
The application provides an anti-retransmission formula interference radar detector includes:
a transmitting antenna for transmitting a first continuous wave signal;
a receiving antenna for receiving a reflected wave signal after the first continuous wave signal is reflected by a target obstacle;
the transmitting channel is connected with the transmitting antenna and the receiving antenna and comprises a signal processing chip, an oscillating circuit and a power divider which are sequentially connected, wherein the signal processing chip is used for generating a preset sawtooth wave signal, the oscillating circuit is used for generating a corresponding linear frequency modulation continuous wave signal belonging to a preset frequency range based on the sawtooth wave signal, the power divider is used for performing power division processing on the linear frequency modulation continuous wave signal to obtain a first continuous wave signal and a second continuous wave signal, and the signal processing chip is a processing chip with a phase locking function;
the receiving channel is connected with the receiving antenna and comprises a mixer, a zero intermediate frequency filter circuit, an analog-to-digital converter and a processor which are sequentially connected, wherein the mixer is used for mixing the reflected wave signals to obtain zero intermediate frequency signals, and the zero intermediate frequency filter circuit is used for filtering the zero intermediate frequency signals to obtain zero intermediate frequency filter signals; the analog-to-digital converter is used for respectively performing analog-to-digital conversion on the zero intermediate frequency filtering signal and the second continuous wave signal to obtain a corresponding zero intermediate frequency digital signal and a corresponding second digital signal, and the processor is used for analyzing and calculating to determine the distance between the target obstacle and the radar detector based on the zero intermediate frequency digital signal and the second digital signal.
Optionally, the transmission channel further comprises:
and a transmission amplifier and/or a transmission filter, respectively connected to the power divider and the transmission antenna, wherein the transmission amplifier is configured to amplify the first continuous wave signal, and the transmission filter is configured to filter the first continuous wave signal.
Optionally, the receiving channel further comprises:
the low-noise amplifier is respectively connected with the receiving antenna and the frequency mixer and is used for carrying out low-frequency filtering processing and amplification processing on the reflected wave signal to obtain a reflection filtering amplification signal;
and the frequency mixer is used for carrying out frequency mixing processing on the reflection filtering amplification signal to obtain the zero intermediate frequency signal.
Optionally, the receiving channel further comprises:
the zero intermediate frequency amplifier is respectively connected with the zero intermediate frequency filter circuit and the analog-to-digital converter and is used for amplifying the zero intermediate frequency filter signal to obtain a zero intermediate frequency amplified signal;
the analog-to-digital converter is used for respectively performing analog-to-digital conversion on the zero intermediate frequency amplified signal and the second continuous wave signal to obtain a corresponding zero intermediate frequency digital signal and a corresponding second digital signal.
Optionally, the preset frequency range is a 120G frequency band.
Optionally, the bandwidth of the chirped continuous wave signal is 2G.
Optionally, the transmit channel and the receive channel are integrated in one single chip SOC chip.
Optionally, the detector further comprises:
and the power supply module is respectively connected with the transmitting channel, the receiving channel, the transmitting antenna and the receiving antenna and used for supplying power to all module elements of the detector.
Optionally, the detector further comprises:
the casing, the casing is the cavity structure of cylinder, transmitting antenna receiving antenna sets up on the surface of casing, the transmission passageway receiving passageway and power module sets up the intracavity of casing, wherein, the bottom surface diameter more than or equal to 15mm less than or equal to 25mm of casing, the height of casing more than or equal to 10mm less than or equal to 20 mm.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the technical scheme in the embodiment of the application, the radar detector is formed by arranging the transmitting antenna, the receiving antenna, the transmitting channel connected with the transmitting antenna and the receiving channel connected with the receiving antenna. When the device is applied, a signal processing chip and an oscillating circuit in a transmitting channel are used for processing and generating a phase-locked linear frequency modulation continuous wave signal which belongs to a preset frequency range, and the continuous wave signal is subjected to power division and then is radiated and transmitted by a transmitting antenna and transmitted to an analog-to-digital converter of a receiving channel. After receiving the corresponding reflected wave signal by the receiving antenna, the frequency mixer carries out frequency mixing processing, the filter carries out filtering processing, the analog-to-digital converter carries out analog-to-digital conversion in sequence, and finally the processor analyzes and calculates the obtained zero intermediate frequency digital signal and the second digital signal to determine the ranging result. According to the technical scheme, the linear continuous wave signal with the preset phase and unchanged phase is used as the ranging signal, so that interference information can be conveniently eliminated in the ranging process, a high-precision distance result is analyzed and determined, and the technical effects of resisting forwarding interference and improving the precision of the wireless ranging result are achieved.
Drawings
Fig. 1 is a structural diagram of an anti-retransmission radar detector according to an embodiment of the present invention.
Detailed Description
The application provides an anti-forwarding interference radar detector for solving the technical problem that a radar detector adopting a wireless ranging technology in the prior art is easily interfered by an enemy jammer in a forwarding mode and cannot work normally in practical application.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
according to the technical scheme in the embodiment of the application, the radar detector is formed by arranging the transmitting antenna, the receiving antenna, the transmitting channel connected with the transmitting antenna and the receiving channel connected with the receiving antenna. When the device is applied, a signal processing chip and an oscillating circuit in a transmitting channel are used for processing and generating a phase-locked linear frequency modulation continuous wave signal which belongs to a preset frequency range, and the continuous wave signal is subjected to power division and then is radiated and transmitted by a transmitting antenna and transmitted to an analog-to-digital converter of a receiving channel. After receiving the corresponding reflected wave signal by the receiving antenna, the frequency mixer carries out frequency mixing processing, the filter carries out filtering processing, the analog-to-digital converter carries out analog-to-digital conversion in sequence, and finally the processor analyzes and calculates the obtained zero intermediate frequency digital signal and the second digital signal to determine the ranging result. According to the technical scheme, the linear continuous wave signal with the preset phase and unchanged phase is used as the ranging signal, so that interference information can be conveniently eliminated in the ranging process, a high-precision distance result is analyzed and determined, and the technical effects of resisting forwarding interference and improving the precision of the wireless ranging result are achieved.
The technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example one
Referring to fig. 1, an embodiment of the present application provides an anti-retransmission radar detector, including:
a transmitting antenna 101 for transmitting a first continuous wave signal;
a receiving antenna 102 for receiving a reflected wave signal after the first continuous wave signal is reflected by a target obstacle;
the transmitting channel is connected with the transmitting antenna and the receiving antenna, and comprises a signal processing chip 1031, an oscillating circuit 1032 and a power divider 1033 which are sequentially connected, wherein the signal processing chip is used for generating a preset sawtooth wave signal, the oscillating circuit is used for generating a corresponding linear frequency modulation continuous wave signal belonging to a preset frequency range based on the sawtooth wave signal, the power divider is used for performing power division processing on the linear frequency modulation continuous wave signal to obtain a first continuous wave signal and a second continuous wave signal, and the signal processing chip is a processing chip with a phase locking function;
a receiving channel, connected to the receiving antenna, and including a mixer 1041, a zero intermediate frequency filter circuit 1042, an analog-to-digital converter 1043, and a processor 1044, which are connected in sequence, where the mixer 1041 is configured to perform frequency mixing processing on the reflected wave signal to obtain a zero intermediate frequency signal, and the zero intermediate frequency filter circuit is configured to perform filtering processing on the zero intermediate frequency signal to obtain a zero intermediate frequency filtered signal; the analog-to-digital converter is used for respectively performing analog-to-digital conversion on the zero intermediate frequency filtering signal and the second continuous wave signal to obtain a corresponding zero intermediate frequency digital signal and a corresponding second digital signal, and the processor is used for analyzing and calculating to determine the distance between the target obstacle and the radar detector based on the zero intermediate frequency digital signal and the second digital signal.
In the practical application of the radar detector of the embodiment of the present application, the explanation can be divided into two aspects, namely, a transmitting step and a receiving step.
The transmitting steps are as follows: the method comprises the steps that firstly, a preset sawtooth wave signal can be generated by the signal processing chip, and the generated sawtooth wave signal has the characteristics of a preset phase and invariable phase because the signal processing chip is a processing chip with a phase locking function. And the oscillation circuit generates a corresponding linear frequency modulation continuous wave signal belonging to a preset frequency range based on the active crystal oscillator and the sawtooth wave signal, and the linear frequency modulation continuous wave signal also has the characteristics of preset phase and invariable phase. In the embodiment of the present application, the preset frequency range is a 120G frequency band, specifically 119 to 121GHz, and the bandwidth of the chirp continuous wave signal is 2G; further, the power divider performs power division processing on the chirp continuous wave signal to obtain the first continuous wave signal and the second continuous wave signal. And finally, the first continuous wave signal is radiated and output to the direction of the target barrier through the transmitting antenna. And the second continuous wave signal may be input as a reference signal to an analog-to-digital converter of the receive path.
The receiving steps are as follows: when the first continuous wave signal is transmitted to a target obstacle, a reflected wave signal is formed through reflection, the receiving antenna can receive the reflected wave signal, then the reflected wave signal is sent to the frequency mixer to be subjected to frequency mixing processing, a zero intermediate frequency signal is obtained, the zero intermediate frequency signal is further transmitted to the zero intermediate frequency filter circuit, various high frequency signals and sawtooth wave signals in the zero intermediate frequency signal are filtered, the zero intermediate frequency filter signal is obtained, and therefore the effect of reducing or filtering interference signals in a space is achieved. And then respectively carrying out analog-to-digital conversion on the zero intermediate frequency filtering signal and the second continuous wave signal by the analog-to-digital converter to obtain a corresponding zero intermediate frequency digital signal and a second digital signal, and finally carrying out comparison and analysis by a processor based on the zero intermediate frequency digital signal and the second digital signal, and calculating and determining the distance between the target obstacle and the radar detector according to the signal characteristics respectively corresponding to the zero intermediate frequency digital signal and the second digital signal. Because the first continuous wave signal and the reflected wave signal in the embodiment of the present application both have the characteristics of a preset phase and no phase change, and meanwhile, the frequency of the chirp continuous wave signal may be a preset frequency band range belonging to an atmospheric absorption peak, and specifically may be a frequency band belonging to a 120G frequency band. Since the frequency band of the chirp continuous wave signal is in the atmospheric absorption peak, the attenuation of the frequency band to the signal is larger, and under the same distance, if the jammer needs to interfere with the radar detector in the embodiment of the present application, the transmission power of the jammer needs to be greatly increased, which is very difficult for the millimeter wave jammer to the sub-terahertz frequency band. Therefore, in the execution process of the receiving step of the radar detector in the embodiment of the application, not only can each relevant module component conveniently determine which of the received signals are required specific signals based on the signal characteristics, but also the difference frequency characteristics of the frequency band to which the chirp continuous wave signal belongs and other interference waves are very obvious, so that the scheme is very easy to eliminate interference information, and further analyzes and determines a high-precision distance result, thereby reducing the influence of the retransmission type interference on the radar detector in application, and simultaneously playing a technical effect of improving the precision of the wireless ranging result.
Further, in order to make signal processing more accurate and reliable, the transmission channel in the embodiment of the present application further includes:
and a transmission amplifier and/or a transmission filter, respectively connected to the power divider and the transmission antenna, wherein the transmission amplifier is configured to amplify the first continuous wave signal, and the transmission filter is configured to filter the first continuous wave signal.
And the receiving channel further comprises:
the low-noise amplifier is respectively connected with the receiving antenna and the frequency mixer and is used for carrying out low-frequency filtering processing and amplification processing on the reflected wave signal to obtain a reflection filtering amplification signal;
and the frequency mixer is used for carrying out frequency mixing processing on the reflection filtering amplification signal to obtain the zero intermediate frequency signal.
Likewise, the receiving channel also includes:
the zero intermediate frequency amplifier is respectively connected with the zero intermediate frequency filter circuit and the analog-to-digital converter and is used for amplifying the zero intermediate frequency filter signal to obtain a zero intermediate frequency amplified signal;
the analog-to-digital converter is used for respectively performing analog-to-digital conversion on the zero intermediate frequency amplified signal and the second continuous wave signal to obtain a corresponding zero intermediate frequency digital signal and a corresponding second digital signal.
It should be noted that the logical connections of the zero intermediate frequency filter circuit, the analog-to-digital converter, and the zero intermediate frequency amplifier may be mutually converted. That is, in actual operation, the analog signal may be subjected to analog-to-digital conversion, then to filtering processing, and then to amplification processing, or the analog signal may be subjected to filtering processing, then to analog-to-digital conversion, and then to amplification processing, or the analog signal may be subjected to amplification processing, then to filtering processing and analog-to-digital conversion, and so on. The technical scheme in the embodiment of the application is not limited at all, and the user can set the method according to the requirement.
That is to say, the technical solution in the embodiment of the present application can amplify the corresponding signal to obtain a better characteristic signal that is easy to analyze and process, and then perform subsequent processing.
Still further, in order to improve the integration level of the radar detector and realize miniaturization, the transmitting channel and the receiving channel are integrated in a single chip SOC chip, and the detector further comprises a power module and a housing:
specifically, the power module is respectively connected to the transmitting channel, the receiving channel, the transmitting antenna and the receiving antenna, and is configured to supply power to each module element of the detector;
the casing is the cavity structure of cylinder, transmitting antenna, receiving antenna sets up on the surface of casing, the transmission passageway, receiving channel and power module sets up the intracavity of casing, wherein, the bottom surface diameter more than or equal to 15mm less than or equal to 25mm of casing, the height more than or equal to 10mm less than or equal to 20mm of casing.
Can make the radar detecter of this application embodiment have small space volume through above-mentioned setting, can also satisfy simultaneously and directly supply power for relevant device by power module, avoid adopting the mode of external power supply wiring, very conveniently be applied to in all kinds of high integrated level and miniaturized environment space.
Therefore, according to the technical scheme in the embodiment of the application, the radar detector is formed by arranging the transmitting antenna, the receiving antenna, the transmitting channel connected with the transmitting antenna and the receiving channel connected with the receiving antenna. When the device is applied, a signal processing chip and an oscillating circuit in a transmitting channel are used for processing and generating a phase-locked linear frequency modulation continuous wave signal which belongs to a preset frequency range, and the continuous wave signal is subjected to power division and then is radiated and transmitted by a transmitting antenna and transmitted to an analog-to-digital converter of a receiving channel. After receiving the corresponding reflected wave signal by the receiving antenna, the frequency mixer carries out frequency mixing processing, the filter carries out filtering processing, the analog-to-digital converter carries out analog-to-digital conversion in sequence, and finally the processor analyzes and calculates the obtained zero intermediate frequency digital signal and the second digital signal to determine the ranging result. According to the technical scheme, the linear continuous wave signal with the preset phase and unchanged phase is used as the ranging signal, so that interference information can be conveniently eliminated in the ranging process, a high-precision distance result is analyzed and determined, and the technical effects of resisting forwarding interference and improving the precision of the wireless ranging result are achieved.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. An anti-retransmission radar detector, comprising:
a transmitting antenna for transmitting a first continuous wave signal;
a receiving antenna for receiving a reflected wave signal after the first continuous wave signal is reflected by a target obstacle;
the transmitting channel is connected with the transmitting antenna and the receiving antenna and comprises a signal processing chip, an oscillating circuit and a power divider which are sequentially connected, wherein the signal processing chip is used for generating a preset sawtooth wave signal, the oscillating circuit is used for generating a corresponding linear frequency modulation continuous wave signal belonging to a preset frequency range based on the sawtooth wave signal, the power divider is used for performing power division processing on the linear frequency modulation continuous wave signal to obtain a first continuous wave signal and a second continuous wave signal, and the signal processing chip is a processing chip with a phase locking function;
the receiving channel is connected with the receiving antenna and comprises a mixer, a zero intermediate frequency filter circuit, an analog-to-digital converter and a processor which are sequentially connected, wherein the mixer is used for mixing the reflected wave signals to obtain zero intermediate frequency signals, and the zero intermediate frequency filter circuit is used for filtering the zero intermediate frequency signals to obtain zero intermediate frequency filter signals; the analog-to-digital converter is used for respectively performing analog-to-digital conversion on the zero intermediate frequency filtering signal and the second continuous wave signal to obtain a corresponding zero intermediate frequency digital signal and a corresponding second digital signal; the processor is used for analytically calculating and determining the distance between the target obstacle and the radar detector based on the zero intermediate frequency digital signal and the second digital signal.
2. The probe of claim 1, wherein the transmit channel further comprises:
and a transmission amplifier and/or a transmission filter, respectively connected to the power divider and the transmission antenna, wherein the transmission amplifier is configured to amplify the first continuous wave signal, and the transmission filter is configured to filter the first continuous wave signal.
3. The probe of claim 1, wherein the receive channel further comprises:
the low-noise amplifier is respectively connected with the receiving antenna and the frequency mixer and is used for carrying out low-frequency filtering processing and amplification processing on the reflected wave signal to obtain a reflection filtering amplification signal;
and the frequency mixer is used for carrying out frequency mixing processing on the reflection filtering amplification signal to obtain the zero intermediate frequency signal.
4. A probe as described in claim 3, wherein the receive channel further comprises:
the zero intermediate frequency amplifier is respectively connected with the zero intermediate frequency filter circuit and the analog-to-digital converter and is used for amplifying the zero intermediate frequency filter signal to obtain a zero intermediate frequency amplified signal;
the analog-to-digital converter is used for respectively performing analog-to-digital conversion on the zero intermediate frequency amplified signal and the second continuous wave signal to obtain a corresponding zero intermediate frequency digital signal and a corresponding second digital signal.
5. The probe of claim 1, wherein the predetermined frequency range is the 120G band.
6. A probe according to claim 5, wherein the bandwidth of the chirped continuous wave signal is 2G.
7. The detector of claim 1, wherein said transmit channel and said receive channel are integrated in a single monolithic SOC chip.
8. The probe of claim 7, further comprising:
and the power supply module is respectively connected with the transmitting channel, the receiving channel, the transmitting antenna and the receiving antenna and used for supplying power to all module elements of the detector.
9. The probe of claim 8, further comprising:
the casing, the casing is the cavity structure of cylinder, transmitting antenna receiving antenna sets up on the surface of casing, the transmission passageway receiving passageway and power module sets up the intracavity of casing, wherein, the bottom surface diameter more than or equal to 15mm less than or equal to 25mm of casing, the height of casing more than or equal to 10mm less than or equal to 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921691123.9U CN212160077U (en) | 2019-10-10 | 2019-10-10 | Anti-forwarding interference radar detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921691123.9U CN212160077U (en) | 2019-10-10 | 2019-10-10 | Anti-forwarding interference radar detector |
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| Publication Number | Publication Date |
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| CN212160077U true CN212160077U (en) | 2020-12-15 |
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| CN201921691123.9U Active CN212160077U (en) | 2019-10-10 | 2019-10-10 | Anti-forwarding interference radar detector |
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| CN (1) | CN212160077U (en) |
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