CN115639526A - Radio anti-interference method and system for detection radar - Google Patents
Radio anti-interference method and system for detection radar Download PDFInfo
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- CN115639526A CN115639526A CN202110813166.5A CN202110813166A CN115639526A CN 115639526 A CN115639526 A CN 115639526A CN 202110813166 A CN202110813166 A CN 202110813166A CN 115639526 A CN115639526 A CN 115639526A
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Abstract
The invention discloses a radio anti-interference method for detecting radar, which transmits more than two paths of signals, including a main signal and an interference signal, wherein the intensity of the interference signal is greater than that of the main signal; the main signal is transmitted after being processed, is received and converted into an intermediate frequency signal after encountering an obstacle target, and then obstacle target information is obtained through calculation; and the interference signal is transmitted and then received by an interference machine. The radio anti-interference system comprises a baseband and signal processor, a main signal processing module, more than one interference signal processing module and at least more than two signal generators; compared with the prior art, the invention has the beneficial effects that on the basis of the original main signal, the transmission of multi-path high-power interference signals is added so as to confuse the interference receiver to receive the main signal, thereby improving the receiving rate of the main signal. The structure is simple, and the number of the interference machines can be increased or decreased according to the number of the interference machines of the other party.
Description
Technical Field
The invention relates to the field of radio communication, in particular to a radio anti-interference method and an anti-interference system for a detection radar.
Background
In the scheme of the radio detection radar in the prior art, a corresponding frequency is generated by the radio detection radar, the radio detection radar is transmitted out through an antenna, an echo is transmitted when meeting an obstacle target, an echo signal is received through an antenna receiver, and the echo signal is converted into an explosion propagation sequence after signal processing to transmit an ignition signal.
Under the working mode of the detection radar under the body systems of Doppler, pulse Doppler, frequency modulated continuous wave and the like, and in the case of an interference machine, particularly a repeater interference machine, the interference machine captures and identifies the transmitted signal of the interference machine, and then amplifies and forwards the signal to interfere the radio detection radar of the interference machine. The radio detection radar has no inhibition capability to the interference signal, and directly enters the receiver to influence the normal work of the radio detection radar, so that the misoperation of ammunition is caused, and the fighting effect is influenced.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides the radio anti-interference method and the anti-interference system for the detection radar, which are used for disordering the jammers by simultaneously or intermittently transmitting the multipath signals with the power similar to that of the main signal and by enabling the strength of the interference signals to be greater than that of the main signal.
The technical scheme of the invention is as follows: a radio anti-interference method for detecting radar transmits more than two paths of signals, including a main signal and an interference signal, wherein the intensity of the interference signal is greater than that of the main signal; the main signal is transmitted after being processed, is received and converted into an intermediate frequency signal after encountering an obstacle target, and then obstacle target information is obtained through calculation; and the interference signal is transmitted and then received by an interference machine.
Preferably, the main signal is divided into two paths of signals, and the signal type is unchanged; one path is used as a local oscillation signal; the other path is transmitted after being amplified and returns as an echo signal after encountering an obstacle target; the local oscillation signal and the echo signal are subjected to frequency mixing to obtain an intermediate frequency signal; and the intermediate frequency signal is calculated to obtain obstacle target information.
As a further improvement, the number of interference signals is greater than the number of main signals.
A radio anti-interference system for detecting radar comprises a baseband and signal processor, a main signal processing module, more than one interference signal processing module and at least more than two signal generators; the main signal processing module is used for processing and receiving the main signal and converting the main signal into an intermediate frequency signal; the interference signal processing module is used for transmitting at least more than one interference signal, and the intensity of each interference signal is greater than that of the main signal; the baseband and signal processor is used for controlling the power and the transmitting time of the main signal and the interference signal; the baseband and signal processor is further configured to calculate an intermediate frequency signal obtained after the processing of the main signal processing module to obtain obstacle target information.
Further, the main signal processing module includes a signal generator, a power divider, an amplifier, a mixer, and an antenna; the signal generated by the signal generator is divided into two paths of signals after passing through the power divider, and one path of signal is sent to the frequency mixer to be used as a local oscillation signal; the other path of signal is sent to an amplifier, is transmitted through an antenna after being amplified, returns to be an echo signal after meeting an obstacle target and is received to a mixer through the antenna; the mixer obtains an intermediate frequency signal by calculating a local oscillation signal and an echo signal; the intermediate frequency signal is amplified by the amplifier and then processed by the baseband and signal processor.
Furthermore, each interference signal processing module comprises an interference signal generator, an amplifier corresponding to the interference signal generator, and an antenna, and signals generated by the interference signal generator are amplified by the amplifier and then transmitted through the antenna.
Furthermore, in the main signal processing module, the other path of signal is amplified by an amplifier, filtered by a filter and transmitted to an antenna for transmission.
Furthermore, each signal generator sends out multiple paths of signals corresponding to one or more antennas.
Furthermore, the multi-channel signal generator sends out multi-channel signals corresponding to one or more antennas.
Preferably, the antenna is a broadband or multimode antenna.
Compared with the prior art, the invention has the beneficial effects that: on the basis of the original main signal, the method increases the emission of multiple paths of high-power interference signals to confuse the interference receiver to receive the main signal, thereby improving the receiving rate of the main signal. The invention has simple structure and can be increased or decreased according to the quantity of the interference machines of the other party.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a radio anti-jamming system according to the present invention;
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, but the present invention is not limited thereto.
A radio anti-interference method for detecting radar transmits more than two paths of signals, including a main signal and an interference signal, wherein the intensity of the interference signal is greater than that of the main signal; the main signal is transmitted after being processed, is received and converted into an intermediate frequency signal after encountering an obstacle target, and then obstacle target information is obtained through calculation; the interference signal is transmitted and then is received by the jammer as a main signal, thereby achieving the function of confusing the jammer.
The main signal is divided into two paths of signals, and the signal type is unchanged; one path is used as a local oscillation signal; the other path is transmitted after being amplified and returns as an echo signal after encountering an obstacle target; the local oscillation signal and the echo signal are subjected to frequency mixing to obtain an intermediate frequency signal; and the intermediate frequency signal is calculated to obtain obstacle target information.
Further, the number of interference signals can be increased or decreased according to the number of interference receivers.
As shown in fig. 1, a radio anti-interference system for detecting radar includes a baseband and signal processor, a main signal processing module, more than one interference signal processing module, and at least more than two signal generators; the main signal processing module is used for processing and receiving the main signal and converting the main signal into an intermediate frequency signal; the interference signal processing module is used for transmitting at least more than one interference signal, and the intensity of each interference signal is greater than that of the main signal; the baseband and signal processor is used for controlling the power and the transmitting time of the main signal and the interference signal; and the device is also used for calculating the intermediate frequency signal obtained after the processing of the main signal processing module to obtain the obstacle target information.
The main signal processing module comprises a signal generator, a power divider, an amplifier, a mixer and an antenna: the signal generated by the signal generator is divided into two paths of signals after passing through the power divider, and one path of signal is sent to the frequency mixer to be used as a local oscillation signal; the other path of signal is sent to an amplifier, filtered by a filter and sent to an antenna for transmission, and returns to be an echo signal after encountering an obstacle target, and then is received by a mixer through the antenna; the mixer obtains an intermediate frequency signal by calculating a local oscillation signal and an echo signal; the intermediate frequency signal is amplified by the amplifier and then processed by the baseband and signal processor.
Each interference signal processing module comprises an interference signal generator, an amplifier corresponding to the interference signal generator and an antenna, and signals generated by the interference signal generator are amplified by the amplifier and then transmitted through the antenna.
As a first system implementation mode, the invention consists of a main signal module and a plurality of interference signal modules, wherein the plurality of modules are controlled by a baseband and a signal processor to transmit, and simultaneously or alternately transmit strong signals with different frequencies from the main signal, thereby achieving the purpose of covering the main signal and greatly improving the receiving of the main signal.
As a second embodiment, on the basis of satisfying the above basic conditions, the system may further include a plurality of main signal processing modules and a plurality of interference signal modules in the interference system, and the number of interference signals may be determined according to the number of interference receivers.
As a third embodiment, each signal generator in the interference system of the present invention sends out multiple signals corresponding to one or more antennas. When corresponding to an antenna, the antenna needs to be both a receiving antenna and a transmitting antenna. When the antenna array corresponds to a plurality of antennas, the receiving antennas are determined according to the number of the main signals, and the rest antennas are transmitting antennas.
As a fourth embodiment, the multipath signal generator in the interference system of the present invention sends out multipath signals corresponding to one or more antennas. When one antenna is used, the antenna needs to receive and transmit simultaneously. When the antenna array corresponds to a plurality of antennas, the receiving antennas are determined according to the number of the main signals, and the rest antennas are transmitting antennas.
The antenna in the above embodiments is a broadband or multimode antenna.
The signal generator in the above embodiments includes, but is not limited to, sine waves, square waves, saw teeth, triangular waves, noise, and the like.
Claims (10)
1. A radio interference rejection method for a detection radar, comprising: transmitting more than two paths of signals, including a main signal and an interference signal, wherein the intensity of the interference signal is greater than that of the main signal; the main signal is transmitted after being processed, is received and converted into an intermediate frequency signal after encountering an obstacle target, and then obstacle target information is obtained through calculation; and the interference signal is transmitted and then received by an interference machine.
2. The radio interference rejection method for a probe radar as in claim 1, wherein: the main signal is divided into two paths of signals, and the signal type is unchanged; one path is used as a local oscillation signal; the other path is transmitted after being amplified and returns as an echo signal after encountering an obstacle target; the local oscillation signal and the echo signal are subjected to frequency mixing to obtain an intermediate frequency signal; and the intermediate frequency signal is calculated to obtain obstacle target information.
3. The radio interference rejection method for a probe radar as in claim 1, wherein: the number of interference signals is greater than the number of primary signals.
4. A radio anti-jamming system for a detection radar, comprising: the system comprises a baseband and signal processor, a main signal processing module, more than one interference signal processing module and at least more than two signal generators; the main signal processing module is used for processing and receiving the main signal and converting the main signal into an intermediate frequency signal; the interference signal processing module is used for transmitting at least more than one interference signal, and the intensity of each interference signal is greater than that of the main signal; the baseband and signal processor is used for controlling the power and the transmitting time of the main signal and the interference signal; the baseband and signal processor is further configured to calculate an intermediate frequency signal obtained after the processing of the main signal processing module to obtain obstacle target information.
5. The radio anti-jamming system for a detection radar of claim 4, wherein: the main signal processing module comprises a signal generator, a power divider, an amplifier, a mixer and an antenna; the signal generated by the signal generator is divided into two paths of signals after passing through the power divider, and one path of signal is sent to the frequency mixer to be used as a local oscillation signal; the other path of signal is sent to an amplifier, is amplified and then is transmitted through an antenna, and returns to be an echo signal after meeting an obstacle target, and then is received to a mixer through the antenna; the mixer obtains an intermediate frequency signal by calculating a local oscillation signal and an echo signal; the intermediate frequency signal is amplified by the amplifier and then processed by the baseband and signal processor.
6. The radar-based radio interference rejection system of claim 4 wherein: each interference signal processing module comprises an interference signal generator, an amplifier corresponding to the interference signal generator and an antenna, and signals generated by the interference signal generator are amplified by the amplifier and then transmitted through the antenna.
7. The radio anti-jamming system for a detection radar of claim 5, wherein: in the main signal processing module, the other path of signal is amplified by an amplifier, filtered by a filter and transmitted to an antenna.
8. A radar against radio interference system for detection radars according to any one of claims 4 to 7, wherein: each signal generator sends out multiple paths of signals corresponding to one or more antennas.
9. A radio anti-jamming system for a detection radar according to any of claims 4 to 7, wherein: the multi-channel signal generator sends out multi-channel signals corresponding to one or more antennas.
10. A radar against radio interference system for detection radars according to any one of claims 4 to 7, wherein: the antenna is a broadband or multi-mode antenna.
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| CN202110813166.5A CN115639526A (en) | 2021-07-19 | 2021-07-19 | Radio anti-interference method and system for detection radar |
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| CN111781566A (en) * | 2020-07-06 | 2020-10-16 | 上海志良电子科技有限公司 | Radar active interference resisting method and equipment |
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2021
- 2021-07-19 CN CN202110813166.5A patent/CN115639526A/en active Pending
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| CN109061576A (en) * | 2018-06-22 | 2018-12-21 | 西安电子科技大学 | A kind of array radar signal method for transmitting and receiving under radio frequency shielding signal |
| CN109581304A (en) * | 2018-12-05 | 2019-04-05 | 航天南湖电子信息技术股份有限公司 | A kind of counterreconnaissance means for anti-jamming and its method |
| CN109884598A (en) * | 2019-03-15 | 2019-06-14 | 西安电子科技大学 | A kind of radio frequency shielding method, apparatus and computer equipment |
| CN111781566A (en) * | 2020-07-06 | 2020-10-16 | 上海志良电子科技有限公司 | Radar active interference resisting method and equipment |
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