CN111970084A - 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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- CN111970084A CN111970084A CN202010652940.4A CN202010652940A CN111970084A CN 111970084 A CN111970084 A CN 111970084A CN 202010652940 A CN202010652940 A CN 202010652940A CN 111970084 A CN111970084 A CN 111970084A
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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
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Abstract
The embodiment of the application provides an interference signal generating device and method and interference signal source equipment. The modulation signals corresponding to the multiple interference frequency bands can be calculated according to the signal interference requirement of the target environment, multiple interference signals aiming at the target environment are generated by using each modulation signal respectively, and the multiple interference signals are transmitted after being superposed. 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 plurality of signal generators, a memory, and a digital-to-analog converter; wherein the content of the first and second substances,
the first processor is used for reading a plurality of modulation parameters aiming at a target environment from the memory, and each modulation parameter comprises an interference frequency band and a modulation mode; respectively calculating a modulation signal according to each modulation parameter; saving the modulated signal to the memory; when an interference signal needs to be transmitted in the target environment, reading interference sequence indication information and a plurality of modulation signals from the memory into the memory;
the second processor is used for reading the interference sequence indication information from the memory, sequentially reading the modulation signals from the memory according to the sequence indicated by the interference sequence indication information, and respectively sending the read modulation signals to different signal generators;
the signal generator is used for modulating the carrier of the signal generator by using the received modulation signal to obtain a baseband signal of an interference signal, and the carrier frequency of each signal generator is fixed frequency;
the second processor is further configured to perform superposition processing on the baseband signals generated by the plurality of signal generators, and send the baseband signals subjected to superposition processing to the digital-to-analog converter;
the digital-to-analog converter is used for converting the received baseband signal into an analog intermediate frequency signal.
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 a plurality of modulation parameters aiming at a target environment from a memory, each modulation parameter comprises an interference frequency band and a modulation mode, a modulation signal is calculated according to each modulation parameter, and the modulation signal is stored in the memory;
when an interference signal needs to be transmitted in the target environment, the first processor reads interference sequence indication information and a plurality of modulation signals from the memory into a memory;
the second processor reads the interference sequence indication information from the memory, sequentially reads the modulation signals from the memory according to the sequence indicated by the interference sequence indication information, and respectively sends the read modulation signals to different signal generators;
the signal generator modulates the carrier of the signal generator by using the received modulation signal to obtain a baseband signal of an interference signal, and the carrier frequency of each signal generator is fixed frequency;
the second processor performs superposition processing on the baseband signals generated by the signal generators and sends the baseband signals subjected to superposition processing to the digital-to-analog converter;
the digital-to-analog converter converts the received baseband signal into an analog intermediate frequency signal.
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 processing the analog intermediate frequency signal and generating 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 modulation signals corresponding to a plurality of interference frequency bands according to the signal interference requirement of a target environment, respectively generate a plurality of interference signals aiming at the target environment by using each modulation signal, and transmit the plurality of interference signals after overlapping. 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 plurality of signal generators 103, a memory 104, a memory 105, and a digital-to-analog converter 106; wherein the content of the first and second substances,
the first processor 101 is configured to read a plurality of modulation parameters for a target environment from the memory 104, where each modulation parameter includes an interference frequency band and a modulation mode; respectively calculating a modulation signal according to each modulation parameter; saving the modulated signal to the memory 104; when an interference signal needs to be transmitted in the target environment, reading interference sequence indication information and a plurality of modulation signals from the memory 104 into the memory 105;
the second processor 102 is configured to read the interference sequence indication information from the memory 105, sequentially read the modulation signals from the memory 105 according to the sequence indicated by the interference sequence indication information, and respectively send the read modulation signals to different signal generators 103;
the signal generator 103 is configured to modulate a carrier of the signal generator with the received modulation signal to obtain a baseband signal of an interference signal, where a carrier frequency of each signal generator is a fixed frequency;
the second processor 102 is further configured to perform superposition processing on the baseband signals generated by the plurality of signal generators 103, and send the baseband signals after the superposition processing to the digital-to-analog converter 106;
the digital-to-analog converter 106 is used for converting the received baseband signal into an analog intermediate frequency signal.
The modulation parameters are sent by an upper computer and are used for describing interference signal requirements.
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 signals corresponding to a plurality of interference frequency bands according to the signal interference requirement of the target environment, respectively generate a plurality of interference signals aiming at the target environment by using each modulation signal, and transmit the plurality of interference signals after being superposed. 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 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 into the memory when the white noise superposition flag indicates that white noise needs to be superposed; the second processor is further configured to: and generating white noise of the white noise bandwidth by using a random algorithm stored in the memory, and superposing the white noise and the baseband signals generated by the signal generators so as to realize more effective signal interference by using the white noise when the modulation mode corresponding to the target environment cannot be determined.
Optionally, the memory further stores the cooperative interference indication information, and then the first processor further reads the cooperative interference indication information from the memory, where the cooperative interference indication information is used to indicate an interference frequency band requiring 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 second processor reads the modulation signals according to the interference sequence indication information and the indication sequence of the cooperative interference indication information, and 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 interference order indication information indicates that the frequencies are sorted in descending order, and the interference coordination indication information indicates that band 1 and band 3 coordinate, then the modulated signals corresponding to the respective bands are read into the memory in the 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 the embodiment of the application, the DDS is realized by the FPGA.
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:
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, 3 DDSs implemented based on the 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 modulation signals corresponding to the interference frequency bands and the target environment identifier into the FLASH in an associated 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 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.
The FPGA reads the modulation signal, the residence time, the white noise bandwidth and the cooperative code number from the DDR according to a preset sequence, 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 superposes 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.
There is a co-interference requirement when interfering, i.e. interfering signals of 2 or more frequency bands simultaneously, there may be discontinuities between frequency bands and there are differences in parameters. In the low end (20 MHz-600 MHz) range, the interference frequency band with the same code is cooperated, when the waveform synthesis is carried out, the mixed frequency band characteristic is achieved, and a plurality of frequency bands are output simultaneously. In the range of high-end (600 MHz-6000 MHz), a frequency hopping switching mode is adopted, interference is preferentially implemented in the frequency bands with the same cooperative code, an interference task of one cooperative code is completed, and then another cooperative code interference task is executed.
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 (7)
1. An interference signal generating device, characterized in that the interference signal generating device comprises a first processor, a second processor, a plurality of signal generators, a memory and a digital-to-analog converter;
the first processor is used for reading a plurality of modulation parameters aiming at a target environment from the memory, and each modulation parameter comprises an interference frequency band and a modulation mode; respectively calculating a modulation signal according to each modulation parameter; saving the modulated signal to the memory; when an interference signal needs to be transmitted in the target environment, reading interference sequence indication information and a plurality of modulation signals from the memory into the memory;
the second processor is used for reading the interference sequence indication information from the memory, sequentially reading the modulation signals from the memory according to the sequence indicated by the interference sequence indication information, and respectively sending the read modulation signals to different signal generators;
the signal generator is used for modulating the carrier of the signal generator by using the received modulation signal to obtain a baseband signal of an interference signal, and the carrier frequency of each signal generator is fixed frequency;
the second processor is further configured to perform superposition processing on the baseband signals generated by the plurality of signal generators, and send the baseband signals subjected to superposition processing to the digital-to-analog converter;
the digital-to-analog converter is used for converting the received baseband signal into an analog intermediate frequency signal.
2. The apparatus of claim 1, wherein the modulation parameters further comprise a white noise overlay identifier and a white noise bandwidth, and the first processor is further configured to identify the white noise overlay identifier, and read the white noise bandwidth into the memory when the white noise overlay identifier indicates that white noise is to be overlaid; the second processor is further configured to: and generating white noise of the white noise bandwidth by using a random algorithm stored in the memory, and superposing the white noise and the baseband signals generated by the plurality of signal generators.
3. The apparatus of claim 1 or 2, wherein the first processor comprises a digital signal processor.
4. The apparatus of claim 3, wherein the second processor comprises a field programmable gate array.
5. The apparatus of claim 4, wherein the signal generator is implemented by the field programmable gate array.
6. A method for generating an interference signal, the method comprising:
the method comprises the steps that a first processor reads a plurality of modulation parameters aiming at a target environment from a memory, each modulation parameter comprises an interference frequency band and a modulation mode, a modulation signal is calculated according to each modulation parameter, and the modulation signal is stored in the memory;
when an interference signal needs to be transmitted in the target environment, the first processor reads interference sequence indication information and a plurality of modulation signals from the memory into a memory;
the second processor reads the interference sequence indication information from the memory, sequentially reads the modulation signals from the memory according to the sequence indicated by the interference sequence indication information, and respectively sends the read modulation signals to different signal generators;
the signal generator modulates the carrier of the signal generator by using the received modulation signal to obtain a baseband signal of an interference signal, and the carrier frequency of each signal generator is fixed frequency;
the second processor performs superposition processing on the baseband signals generated by the signal generators and sends the baseband signals subjected to superposition processing to the digital-to-analog converter;
the digital-to-analog converter converts the received baseband signal into an analog intermediate frequency signal.
7. An interfering signal source device, characterized in that the device comprises the interfering signal generating apparatus of any one of claims 1 to 5, the device further comprising a radio frequency unit and a power amplifier;
the radio frequency unit is used for processing the analog intermediate frequency signal and generating 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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