CN111970083B - Interference signal generating device and method and interference signal source equipment - Google Patents
Interference signal generating device and method and interference signal source equipment Download PDFInfo
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- CN111970083B CN111970083B CN202010652006.2A CN202010652006A CN111970083B CN 111970083 B CN111970083 B CN 111970083B CN 202010652006 A CN202010652006 A CN 202010652006A CN 111970083 B CN111970083 B CN 111970083B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/827—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection using characteristics of target signal or of transmission, e.g. using direct sequence spread spectrum or fast frequency hopping
Abstract
The embodiment of the application provides an interference signal generating device and method and interference signal source equipment. The modulated signal may be calculated according to the signal interference requirements of the target environment and used to generate an interference signal for the target environment. The interference signal meeting the interference requirement is flexibly generated, and full-band interference is not needed, so that the number of parts such as an antenna and the like can be reduced, the size and the power consumption of interference signal source equipment are reduced, and the requirement of a vehicle-mounted environment is met.
Description
Technical Field
The embodiment of the application relates to the technical field of signal interference, in particular to an interference signal generating device and method and interference signal source equipment.
Background
In many situations, signal interference to communications in a target area is required for safety protection purposes such as information security, property security, and personal security. And sending an interference signal to the target area by the interference signal source equipment so as to achieve the purpose of interfering the communication signal of the target area.
In the existing implementation, the frequency band covered by the interfering signal source device and the adopted modulation mode are fixed in the device hardware. Therefore, part of the interference signal source equipment interferes the full-band signal in a power suppression mode, so that the transmission power of the interference signal source equipment is large and the equipment volume is large; and part of the interference signal source equipment only realizes interference aiming at signals of a specific frequency band and a specific modulation mode.
The interference signal source equipment cannot meet the requirements of a vehicle-mounted environment. In some scenarios, it is desirable to achieve small areas of signal interference over a large range in a mobile manner. The vehicle-mounted environment means that the environment is variable, the signal frequency band and the modulation mode under different environments are often different, and even in the moving process of one task, the signal frequency band and the modulation mode of the approach environment can be changed. The signal disturbing source devices are too large in size, high in power consumption and inconvenient to move, and the vehicles cannot provide enough space and power sources for the signal disturbing source devices. If the interfering signal source device can only interfere with the signal of the specific frequency band and the specific modulation mode, it cannot cope with the changeable signal environment in the moving process.
Disclosure of Invention
The embodiment of the application provides an interference signal generating device, an interference signal generating method and interference signal source equipment, so as to solve the technical problem.
In a first aspect, an embodiment of the present application provides an interference signal generating apparatus, where the apparatus includes a first processor, a second processor, a memory, and a digital-to-analog converter; wherein the content of the first and second substances,
the first processor is used for reading modulation parameters, residence time and a frequency hopping interval aiming at a target environment from the memory, wherein the modulation parameters comprise an interference frequency band and a modulation mode, the residence time meets the requirement of preset moving speed, and the frequency hopping interval meets the requirement of a signal suppression range of the target environment; selecting a function corresponding to the modulation parameter from a function library stored in the memory, and calculating a modulation signal matched with the modulation parameter by using the function, wherein the modulation signal comprises at least one of the following components: a phase modulation signal, an amplitude modulation signal, a frequency modulation signal; saving the modulated signal to the memory; when an interference signal needs to be transmitted in the target environment, reading the modulation signal, the residence time and the frequency hopping interval stored in the memory into the memory;
the second processor is configured to read the modulation signal and the dwell time from the memory, generate a baseband signal of an interference signal using the modulation signal in the dwell time, and send the baseband signal to the digital-to-analog converter;
the digital-to-analog converter is used for converting the baseband signal into an analog intermediate frequency signal and sending the analog intermediate frequency signal to the radio frequency unit, so that the radio frequency unit can perform frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval.
In a second aspect, an embodiment of the present application provides an interference signal generating method, where the method includes:
the method comprises the steps that a first processor reads modulation parameters, residence time and frequency hopping intervals aiming at a target environment from a memory, wherein the modulation parameters comprise an interference frequency band and a modulation mode, the residence time meets a preset moving speed requirement, and the frequency hopping intervals meet a signal suppression range requirement of the target environment;
the first processor selects a function corresponding to the modulation parameter from a function library stored in the memory, and calculates a modulation signal matched with the modulation parameter by using the function, wherein the modulation signal comprises at least one of the following: a phase modulation signal, an amplitude modulation signal, a frequency modulation signal;
the first processor saving the modulated signal to the memory;
when an interference signal needs to be transmitted in the target environment, the first processor reads the modulation signal, the residence time and the frequency hopping interval stored in the memory into a memory;
the second processor reads the modulation signal and the residence time from the memory, generates a baseband signal of an interference signal by using the modulation signal in the residence time, and sends the baseband signal to the digital-to-analog converter;
and the digital-to-analog converter converts the baseband signal into an analog intermediate frequency signal and sends the analog intermediate frequency signal to a radio frequency unit so that the radio frequency unit performs frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval.
In a third aspect, an embodiment of the present application provides an interference signal source device, where the device includes the interference signal generating apparatus in the first aspect, and the device further includes a radio frequency unit and a power amplifier;
the radio frequency unit is used for reading the frequency hopping interval from the memory and carrying out frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval to generate a radio frequency signal of the interference signal;
the power amplifier is used for carrying out power amplification processing on the radio frequency signal.
The interference signal generation device, the interference signal generation method and the interference signal source equipment provided by the embodiment of the application can calculate the modulation signal according to the signal interference requirement of the target environment, and generate the interference signal aiming at the target environment by using the modulation signal. The interference signal meeting the interference requirement is flexibly generated, and full-band interference is not needed, so that the number of parts such as an antenna and the like can be reduced, the size and the power consumption of interference signal source equipment are reduced, and the requirement of a vehicle-mounted environment is met.
Drawings
Fig. 1 is a schematic diagram of an interference signal generating apparatus according to an embodiment of the present application;
fig. 2 is a flowchart of an interference signal generating method according to an embodiment of the present application;
fig. 3 is a schematic diagram of an interference signal source device according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and the embodiments of the present application may be combined with each other without conflict.
An interference signal generating apparatus is provided in an embodiment of the present application, as shown in fig. 1, the apparatus includes a first processor 101, a second processor 102, a memory 103, a memory 104, and a digital-to-analog converter 105; wherein the content of the first and second substances,
the first processor 101 is configured to read, from the memory 103, modulation parameters, a dwell time and a frequency hopping interval for a target environment, where the modulation parameters include an interference frequency band and a modulation mode, the dwell time meets a predetermined moving speed requirement, and the frequency hopping interval meets a signal suppression range requirement of the target environment; selecting a function corresponding to the modulation parameter from a function library stored in the memory 103, and calculating a modulation signal matched with the modulation parameter by using the function, wherein the modulation signal includes at least one of the following: a phase modulation signal, an amplitude modulation signal, a frequency modulation signal; saving the modulated signal to the memory 103; when an interference signal needs to be transmitted in the target environment, reading the modulation signal, the dwell time and the frequency hopping interval stored in the memory 103 into the memory 104;
the second processor 102 is configured to read the modulation signal and the dwell time from the memory 104, generate a baseband signal of an interference signal by using the modulation signal in the dwell time, and send the baseband signal to the digital-to-analog converter 105;
the digital-to-analog converter 105 is configured to convert the baseband signal into an analog intermediate frequency signal, and send the analog intermediate frequency signal to a radio frequency unit, so that the radio frequency unit performs frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval.
The modulation parameters, the residence time and the frequency hopping interval are sent by an upper computer and are used for describing the requirements of the interference signals.
The frequency hopping interval refers to a frequency interval in which the center frequency of the interference signal hops from one point to another point within the interference frequency band. The hop interval is no greater than 1/2 of the interfering signal bandwidth. Ensuring that interference signals do not create inter-band gaps. Under the vehicle-mounted environment, the environment changes rapidly, so that the in-band communication signals are required to be suppressed as much as possible in a short time, and under the condition of known running speed, the residence time can be reasonably set to meet the preset moving speed requirement, so that the residence time is shortened as much as possible on the premise of meeting the moving speed requirement; in addition, under the condition that the signal suppression range of the target environment is known, the frequency hopping interval is set according to the requirement of the signal suppression range, so that the suppression is performed on the in-band communication signals as much as possible in the dwell time.
In practical application, the interference signal generating device can receive an instruction of an upper computer so as to determine that the interference signal needs to be transmitted in a target environment, and can also determine that the interference signal needs to be transmitted in the target environment through triggering of a physical key arranged on the device.
The interference signal generation device provided by the embodiment of the application can calculate the modulation signal according to the signal interference requirement of the target environment and generate the interference signal aiming at the target environment by using the modulation signal. The interference signal meeting the interference requirement is flexibly generated, and full-band interference is not needed, so that the number of parts such as an antenna and the like can be reduced, the size and the power consumption of interference signal source equipment are reduced, and the requirement of a vehicle-mounted environment is met.
Further, the modulation parameters may further include a white noise superposition flag and a white noise bandwidth, and the first processor is further configured to identify the white noise superposition flag, and read the white noise bandwidth as the modulation signal to the memory when the white noise superposition flag indicates that white noise needs to be superimposed. Correspondingly, the second processor can perform signal modulation according to the white noise, so that when the modulation mode corresponding to the target environment cannot be determined, more effective signal interference is realized by the white noise.
If signals of a plurality of frequency bands in a target environment need to be interfered, the first processor reads modulation parameters, residence time and frequency hopping intervals of the frequency bands aiming at the target environment, and ordering modes and cooperative interference indication information of the frequency bands aiming at the target environment from the memory, wherein the cooperative interference indication information is used for indicating the interference frequency bands needing the cooperative interference; respectively selecting a function corresponding to the modulation parameter of the interference frequency band aiming at each interference frequency band, and calculating a modulation signal matched with the interference frequency band by using the selected function; when an interference signal needs to be transmitted in the target environment, the first processor stores the modulation signal corresponding to each interference frequency band in the memory according to the sorting mode and the indication sequence of the cooperative interference indication information, where the modulation signals of the interference frequency bands indicated by the cooperative interference indication information are adjacent.
For example, if there are band 1, band 2, and band 3, where the frequency of band 1 is lower than the frequency of band 2, the frequency of band 2 is lower than the frequency of band 3, the above-mentioned sorting method indicates sorting in order of frequencies from high to low, and the above-mentioned interference coordination indication information indicates coordination between band 1 and band 3, then the modulated signals corresponding to the respective bands are read into the memory in order of band 3, band 1, and band 2.
In this embodiment, the first processor may be a digital signal processor DSP, an ARM, or another general-purpose processor.
In this embodiment of the application, the second processor may be a field programmable gate array FPGA or a high-speed DSP.
In one implementation, the FPGA includes a signal generator DDS, and the field programmable gate array generates the baseband signal using the DDS.
In another implementation, the FPGA includes a phase-locked loop, and the field programmable gate array generates the baseband signal using the phase-locked loop.
In the embodiment of the present application, the memory may be a FLASH memory (FLASH), and the memory may be a DDR (double data rate) random access memory.
An embodiment of the present application provides an interference signal generating method, as shown in fig. 2, the method includes:
Optionally, the modulation parameters further include a white noise superposition flag and a white noise bandwidth, and the method further includes:
and the first processor identifies the white noise superposition identifier, and reads the white noise bandwidth as the modulation signal into the memory when the white noise superposition identifier indicates that white noise needs to be superposed.
The embodiment of the present application further provides an interference signal source device, which includes the above interference signal generating apparatus, and further includes a radio frequency unit and a power amplifier. Wherein:
the radio frequency unit is used for reading the frequency hopping interval from the memory and carrying out frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval to generate a radio frequency signal of the interference signal;
the power amplifier is used for carrying out power amplification processing on the radio frequency signal.
The following describes the interference signal source device provided in the embodiment of the present application with reference to a specific application scenario. As shown in fig. 3, the interference signal source device includes a DSP, an FPGA, a FLASH, a DDR, a DDS implemented based on an FPGA, a DAC, a radio frequency unit, and a power amplifier.
And the upper computer stores the interference demand data aiming at the target environment and the target environment identifier into FLASH in an associated manner. The target environment may require interference to be performed on multiple frequency bands, and each frequency band corresponds to a set of interference requirement data. The data format of the interference requirement data comprises the following fields:
the start frequency of the interference band, the cut-off frequency of the interference band, the modulation mode (including no modulation, linear modulation, BPSK, QPSK, OFDM, etc.), the modulation bandwidth (i.e., signal bandwidth), the dwell time, a white noise superposition flag (indicating whether white noise is superposed), the white noise bandwidth, an interference coordination band flag (indicating whether coordination interference is required), the local band coordination code, and the frequency hopping interval.
When detecting that the FLASH has newly added interference demand data, the DSP reads the newly added interference demand data, searches a function matched with the modulation mode from the function library, takes the starting point frequency of the interference frequency band, the cut-off frequency of the interference frequency band, the modulation mode and the modulation bandwidth as function input, and calculates to obtain a modulation signal. The obtained modulation signals are also different according to different modulation modes. For the frequency modulation scheme, the modulation signal is a frequency modulation signal, and for the phase modulation scheme, the modulation signal is a phase modulation signal.
And the DSP stores the modulated signal and the target environment identifier into the FLASH in a correlation manner.
When an interference signal is required to be transmitted aiming at a target environment, the upper computer sends an instruction to the DSP, the instruction carries a target environment identifier, and the DSP reads a modulation signal, residence time and frequency hopping interval corresponding to the target environment identifier from the FLASH. In addition, if white noise needs to be superimposed, the DSP also reads the bandwidth of the white noise. If there are multiple interference frequency bands and the interference cooperative frequency band mark indicates that cooperative interference is needed, the DSP also reads the cooperative code number. The DSP saves the read data to the DDR.
If there are multiple interference frequency bands, the DSP sequences the modulation signals of these interference frequency bands, generally according to the principle of sequencing the frequencies from high to low or from low to high, and if the interference coordination frequency band flag of a certain interference frequency band indicates that interference coordination is needed, the frequency bands needing interference coordination are arranged to adjacent positions.
The FPGA reads the modulation signal, the residence time, the white noise bandwidth and the cooperative code number from the DDR and sends the data to the DDS.
The DDS generates a baseband signal in the dwell time according to the modulation signal and the white noise bandwidth, and sends the baseband signal to the DAC.
If a plurality of interference frequency bands exist, the DDS combines baseband signals of the plurality of interference frequency bands and then sends the baseband signals to the DAC.
And after the DAC receives the baseband signal, the DAC carries out digital-to-analog conversion to generate an intermediate frequency signal and sends the intermediate frequency signal to the radio frequency unit.
And the radio frequency unit reads the frequency hopping interval, and performs frequency hopping processing on the intermediate frequency signal according to the frequency hopping interval to generate a radio frequency signal.
The power amplifier amplifies the power of the radio frequency signal and then sends the radio frequency signal through the antenna.
The description has been presented with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the description. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present specification 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 changes and modifications that fall within the scope of the specification.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the specification is intended to include such modifications and variations.
Claims (10)
1. An interference signal generating device, wherein the interference signal generating device comprises a first processor, a second processor, a memory and a digital-to-analog converter;
the first processor is used for reading modulation parameters, residence time and a frequency hopping interval aiming at a target environment from the memory, wherein the modulation parameters comprise an interference frequency band and a modulation mode, the residence time meets the requirement of preset moving speed, and the frequency hopping interval meets the requirement of a signal suppression range of the target environment; selecting a function corresponding to the modulation parameter from a function library stored in the memory, and calculating a modulation signal matched with the modulation parameter by using the function, wherein the modulation signal comprises at least one of the following components: a phase modulation signal, an amplitude modulation signal, a frequency modulation signal; saving the modulated signal to the memory; when an interference signal needs to be transmitted in the target environment, reading the modulation signal, the residence time and the frequency hopping interval stored in the memory into the memory;
the second processor is configured to read the modulation signal and the dwell time from the memory, generate a baseband signal of an interference signal using the modulation signal in the dwell time, and send the baseband signal to the digital-to-analog converter;
the digital-to-analog converter is used for converting the baseband signal into an analog intermediate frequency signal and sending the analog intermediate frequency signal to the radio frequency unit, so that the radio frequency unit can perform frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval.
2. The apparatus of claim 1, wherein the modulation parameters further comprise a white noise overlay indicator and a white noise bandwidth, and the first processor is further configured to identify the white noise overlay indicator, and read the white noise bandwidth as the modulation signal to the memory when the white noise overlay indicator indicates that white noise is to be overlaid.
3. The apparatus of claim 1, wherein the first processor reads, from the memory, modulation parameters, dwell times, and hopping intervals for each of a plurality of frequency bands of a target environment, and an ordering manner for the plurality of frequency bands of the target environment, and cooperative interference indication information indicating interference frequency bands requiring cooperative interference; when an interference signal needs to be transmitted in the target environment, the first processor stores the modulation signal corresponding to each interference frequency band in the memory according to the sorting mode and the indication sequence of the cooperative interference indication information, where the modulation signals of the interference frequency bands indicated by the cooperative interference indication information are adjacent.
4. The apparatus of any of claims 1 to 3, wherein the first processor comprises a digital signal processor.
5. The apparatus of claim 4, wherein the second processor comprises a field programmable gate array.
6. The apparatus of claim 5, wherein the field programmable gate array comprises a signal generator, the field programmable gate array generating the baseband signal with the signal generator.
7. The apparatus of claim 6, wherein the field programmable gate array includes a phase-locked loop, the field programmable gate array generating the baseband signal using the phase-locked loop.
8. A method for generating an interference signal, the method comprising:
the method comprises the steps that a first processor reads modulation parameters, residence time and frequency hopping intervals aiming at a target environment from a memory, wherein the modulation parameters comprise an interference frequency band and a modulation mode, the residence time meets a preset moving speed requirement, and the frequency hopping intervals meet a signal suppression range requirement of the target environment;
the first processor selects a function corresponding to the modulation parameter from a function library stored in the memory, and calculates a modulation signal matched with the modulation parameter by using the function, wherein the modulation signal comprises at least one of the following: a phase modulation signal, an amplitude modulation signal, a frequency modulation signal;
the first processor saving the modulated signal to the memory;
when an interference signal needs to be transmitted in the target environment, the first processor reads the modulation signal, the residence time and the frequency hopping interval stored in the memory into a memory;
the second processor reads the modulation signal and the residence time from the memory, generates a baseband signal of an interference signal by using the modulation signal in the residence time, and sends the baseband signal to the digital-to-analog converter;
and the digital-to-analog converter converts the baseband signal into an analog intermediate frequency signal and sends the analog intermediate frequency signal to a radio frequency unit so that the radio frequency unit performs frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval.
9. The method of claim 8, wherein the modulation parameters further comprise a white noise overlay identifier and a white noise bandwidth, the method further comprising:
and the first processor identifies the white noise superposition identifier, and reads the white noise bandwidth as the modulation signal into the memory when the white noise superposition identifier indicates that white noise needs to be superposed.
10. An interfering signal source device, characterized in that the device comprises the interfering signal generating apparatus of any one of claims 1 to 7, the device further comprising a radio frequency unit and a power amplifier;
the radio frequency unit is used for reading the frequency hopping interval from the memory and carrying out frequency hopping processing on the analog intermediate frequency signal according to the frequency hopping interval to generate a radio frequency signal of the interference signal;
the power amplifier is used for carrying out power amplification processing on the radio frequency signal.
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