CN111970084B - Interference signal generation device, method and interference signal source equipment - Google Patents
Interference signal generation device, method and interference signal source equipment Download PDFInfo
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- CN111970084B CN111970084B CN202010652940.4A CN202010652940A CN111970084B CN 111970084 B CN111970084 B CN 111970084B CN 202010652940 A CN202010652940 A CN 202010652940A CN 111970084 B CN111970084 B CN 111970084B
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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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- Computer Networks & Wireless Communication (AREA)
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Abstract
The embodiment of the application provides an interference signal generating device, an interference signal generating method and interference signal source equipment. The method can calculate the modulation signals corresponding to the 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 utilizing each modulation signal, and transmit the interference signals after superposition. The method can flexibly generate the interference signals meeting the interference requirements, and does not need full-frequency-band interference, so that the number of parts such as antennas can be reduced, the size and the power consumption of the interference signal source equipment are reduced, and the requirements of vehicle-mounted environment are 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, an interference signal generating method and interference signal source equipment.
Background
In many cases, signal interference is required for communication in a target area for the purpose of safety protection such as information safety, property safety, personal safety, and the like. And the interference signal source equipment sends an interference signal to the target area so as to achieve the purpose of interfering the communication signal of the target area.
In the existing implementation mode, the frequency band covered by the interference signal source equipment and the modulation mode adopted are solidified into equipment hardware. Therefore, part of interference signal source equipment adopts a power suppression mode to interfere signals in a full frequency band, so that the transmitting power is high and the equipment volume is large; the partial interference signal source device only realizes interference for signals of a specific frequency band and a specific modulation mode.
The interference signal source equipment cannot meet the requirements of vehicle-mounted environments. In some scenarios, it is desirable to achieve small-area signal interference in a mobile manner over a large area. The vehicle-mounted environment means that the environment is changeable, the signal frequency bands and modulation modes in different environments are often different, and even in the moving process of a task, the signal frequency bands and modulation modes in the path environment can be changed. If the interference signal source equipment is too large in size and high in power consumption, the equipment is inconvenient to move, and the vehicle cannot provide enough space and power supply for the equipment. If the interference signal source device can only interfere with the signals of the specific frequency band and the specific modulation mode, the interference signal source device 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, which are used for solving the technical problems.
In a first aspect, an embodiment of the present application provides an apparatus for generating an interference signal, 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 liquid crystal display device comprises a liquid crystal display device,
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 the interference signal is required to be transmitted in the target environment, the interference sequence indication information and a plurality of modulation signals are read from the memory to 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 wave of the signal generator by utilizing 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 baseband signals generated by the plurality of signal generators, and send the baseband signals after the 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 a method for generating an interference signal, where the method includes:
the first processor reads a plurality of modulation parameters aiming at a target environment from a memory, wherein each modulation parameter comprises an interference frequency band and a modulation mode, calculates a modulation signal according to each modulation parameter, and stores the modulation signal into the memory;
when the interference signal is required to be transmitted in the target environment, the first processor reads the interference sequence indication information and a plurality of modulation signals from the storage device 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 sends the read modulation signals to different signal generators respectively;
the signal generator modulates the carrier wave of the signal generator by utilizing the received modulation signal to obtain a baseband signal of an interference signal, and the carrier wave frequency of each signal generator is fixed frequency;
the second processor performs superposition processing on the baseband signals generated by the plurality of 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 to 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 of 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 signals.
According to the interference signal generating device, the interference signal generating method and the interference signal source equipment, the modulation signals corresponding to the interference frequency bands can be calculated according to the signal interference requirements of the target environment, the modulation signals are respectively utilized to generate the interference signals aiming at the target environment, and the interference signals are transmitted after being overlapped. The method can flexibly generate the interference signals meeting the interference requirements, and does not need full-frequency-band interference, so that the number of parts such as antennas can be reduced, the size and the power consumption of the interference signal source equipment are reduced, and the requirements of vehicle-mounted environment are met.
Drawings
Fig. 1 is a schematic diagram of an interference signal generating device 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 interfering signal source device according to an embodiment of the application.
Detailed Description
In order to better understand the above technical solutions, the following detailed description of the technical solutions of the embodiments of the present application is made by using the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the technical features of the embodiments of the present application may be combined with each other without conflict.
The embodiment of the application provides an interference signal generating device, as shown in fig. 1, which comprises a first processor 101, a second processor 102, a plurality of signal generators 103, a storage 104, a memory 105 and a digital-to-analog converter 106; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first processor 101 is configured to read, from the memory 104, a plurality of modulation parameters for a target environment, 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 storage 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 send the read modulation signals to different signal generators 103 respectively;
the signal generator 103 is configured to modulate a carrier of the signal generator with the received modulated 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 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 configured to convert the received baseband signal to an analog intermediate frequency signal.
The modulation parameters are sent by the upper computer and are used for describing the interference signal requirements.
In practical application, the interference signal generating device may receive the instruction of the upper computer to determine that the interference signal needs to be transmitted in the target environment, or may determine that the interference signal needs to be transmitted in the target environment by triggering a physical key set on the device.
The interference signal generating 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 utilizing each modulation signal, and superimpose and transmit the plurality of interference signals. The method can flexibly generate the interference signals meeting the interference requirements, and does not need full-frequency-band interference, so that the number of parts such as antennas can be reduced, the size and the power consumption of the interference signal source equipment are reduced, and the requirements of vehicle-mounted environment are met.
Further, the modulation parameter further includes a white noise superposition identifier and a white noise bandwidth, and the first processor is further configured to identify the white noise superposition identifier, and read the white noise bandwidth to the memory when the white noise superposition identifier indicates that white noise needs to be superimposed; the second processor is further configured to: and generating white noise with the white noise bandwidth by using a random algorithm stored in the memory, and superposing the white noise with baseband signals generated by a plurality of signal generators so as to realize more effective signal interference by using the white noise when a modulation mode corresponding to a target environment cannot be determined.
Optionally, the memory further stores co-interference indication information, and then the first processor further reads the co-interference indication information from the memory, where the co-interference indication information is used to indicate an interference frequency band that needs co-interference; for each interference frequency band, selecting a function corresponding to the modulation parameter of the interference frequency band, and calculating a modulation signal matched with the interference frequency band by using the selected function; and when the interference signal is required to be transmitted in the target environment, the second processor reads the modulation signals according to the indication sequence of the interference sequence indication information and the cooperative interference indication information, wherein the modulation signals of the interference frequency bands indicated by the cooperative interference indication information are adjacent.
For example, there are band 1, band 2, and band 3, wherein 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 ordered from high to low, and the interference coordination indication information indicates that band 1 and band 3 are coordinated, and 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 the embodiment of the present application, the first processor may be a digital signal processor DSP, or may be an ARM, or may be another general-purpose processor.
In the embodiment of the present application, the second processor may be a field programmable gate array FPGA or a high-speed DSP.
In the embodiment of the application, the signal generator DDS is realized by an FPGA.
In the embodiment of the application, the memory may be a FLASH memory (FLASH), and the memory may be a DDR (double data rate) random access memory.
The embodiment of the application provides a method for generating an interference signal, as shown in fig. 2, which comprises the following steps:
step 201, a first processor reads a plurality of modulation parameters aiming at a target environment from a memory, wherein 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;
step 202, 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 storage device into a memory;
step 203, the second processor reads the interference sequence indication information from the memory, reads the modulation signals from the memory in sequence according to the sequence indicated by the interference sequence indication information, and sends the read modulation signals to different signal generators respectively;
step 204, the signal generator modulates the carrier wave of the signal generator by using the received modulation signal to obtain the baseband signal of the interference signal, wherein the carrier wave frequency of each signal generator is a fixed frequency;
step 205, the second processor performs superposition processing on the baseband signals generated by the plurality of signal generators, and sends the baseband signals after superposition processing to a digital-to-analog converter;
step 206, the digital-to-analog converter converts the received baseband signal into an analog intermediate frequency signal.
The interference signal source device provided by the embodiment of the application is explained below in connection with a specific application scenario. As shown in fig. 3, the interference signal source device includes DSP, FPGA, FLASH, DDR, 3 DDS implemented based on FPGA, DAC, radio frequency unit and power amplifier.
And the upper computer associates and stores the interference demand data aiming at the target environment with the target environment identifier into the FLASH. The target environment may need to implement interference on multiple frequency bands, then each frequency band corresponds to a set of interference requirement data. The data format of the interference requirement data comprises the following fields:
the method comprises the steps of starting frequency of an interference frequency band, cut-off frequency of the interference frequency band, modulation modes (including no modulation, linear modulation, BPSK, QPSK, OFDM and the like), modulation bandwidth (namely signal bandwidth), residence time, white noise superposition mark (indicating whether white noise is superposed), white noise bandwidth, interference cooperative frequency band mark (indicating whether cooperative interference is needed or not), cooperative code number of the frequency band and frequency hopping interval.
When the newly added interference demand data is detected in the FLASH, the DSP reads the newly added interference demand data, searches a function matched with the modulation mode from a function library, takes the starting point frequency of an interference frequency band, the cut-off frequency of the interference frequency band, the modulation mode and the modulation bandwidth as functions to input, and calculates to obtain a modulation signal. The modulation signals obtained are different according to different modulation modes. The modulation signal is a frequency modulation signal for the frequency modulation scheme, and a phase modulation signal for the phase modulation scheme.
And the DSP correlates and stores the modulation signals corresponding to each interference frequency band with the target environment identifier into the FLASH.
When an interference signal needs 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 white noise bandwidth. The plurality of interference co-band flags indicate that co-interference is required and the DSP also reads the co-code. The DSP saves the read data to the DDR.
The FPGA reads the modulation signal, dwell time, white noise bandwidth, co-code number from the DDR in a predetermined order, and sends these data to the DDS.
The DDS generates a baseband signal in the dwell time according to the modulation signal, the white noise bandwidth, and sends the baseband signal to the DAC.
If a plurality of interference frequency bands exist, the DDS superimposes the baseband signals of the interference frequency bands and sends the superimposed baseband signals to the DAC.
And after the DAC receives the baseband signal, digital-to-analog conversion is carried out, and an intermediate frequency signal is generated and sent to the radio frequency unit.
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 sends the radio frequency signal out through the antenna.
There is a cooperative interference requirement during interference, that is, signals in 2 or more frequency bands are simultaneously interfered, the frequency bands may be discontinuous, and parameters are different. In the low-end (20 MHz-600 MHz) range, the interference frequency bands with the same code are cooperated, and the mixed frequency band characteristics are provided and a plurality of frequency bands are output at the same time when the waveform synthesis is performed. In the high-end (600 MHz-6000 MHz) range, the interference is preferentially implemented in the frequency band with the same co-code by adopting a frequency hopping switching mode, so that the interference task of one co-code is completed, and then the interference task of the other co-code is executed.
The present description is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 description 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. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present specification without departing from the spirit or scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims and the equivalents thereof, the present specification is also intended to include such modifications and variations.
Claims (7)
1. An interference signal generating device is characterized by comprising 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 the interference signal is required to be transmitted in the target environment, the interference sequence indication information and a plurality of modulation signals are read from the memory to 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 wave of the signal generator by utilizing 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 baseband signals generated by the plurality of signal generators, and send the baseband signals after the 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 superposition identification and a white noise bandwidth, the first processor further configured to identify the white noise superposition identification, and read the white noise bandwidth to the memory when the white noise superposition identification indicates that white noise is required to be superimposed; the second processor is further configured to: and generating white noise with the white noise bandwidth by using a random algorithm stored in the memory, and superposing the white noise with baseband signals generated by a 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 of generating an interfering signal, the method comprising:
the first processor reads a plurality of modulation parameters aiming at a target environment from a memory, wherein each modulation parameter comprises an interference frequency band and a modulation mode, calculates a modulation signal according to each modulation parameter, and stores the modulation signal into the memory;
when the interference signal is required to be transmitted in the target environment, the first processor reads the interference sequence indication information and a plurality of modulation signals from the storage device 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 sends the read modulation signals to different signal generators respectively;
the signal generator modulates the carrier wave of the signal generator by utilizing the received modulation signal to obtain a baseband signal of an interference signal, and the carrier wave frequency of each signal generator is fixed frequency;
the second processor performs superposition processing on the baseband signals generated by the plurality of 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 to an analog intermediate frequency signal.
7. An interfering signal source device, characterized in that the device comprises the interfering signal generating means of any 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 signals.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120064512A (en) * | 2010-12-09 | 2012-06-19 | 국방과학연구소 | System, apparatus and method for generating follower jamming signal |
| CN102916752A (en) * | 2012-05-07 | 2013-02-06 | 中国人民解放军国防科学技术大学 | Automatic generation method and device of complex interference |
| CN105376007A (en) * | 2015-10-09 | 2016-03-02 | 四川九洲电器集团有限责任公司 | Interference source device |
| WO2018032998A1 (en) * | 2016-08-16 | 2018-02-22 | 大唐移动通信设备有限公司 | Signal interference apparatus and method |
| CN110716214A (en) * | 2018-10-31 | 2020-01-21 | 北京北斗星通导航技术股份有限公司 | Signal processing method and device |
| CN110927683A (en) * | 2019-10-17 | 2020-03-27 | 南京国立电子科技有限公司 | Interference signal generating device and method thereof |
-
2020
- 2020-07-08 CN CN202010652940.4A patent/CN111970084B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120064512A (en) * | 2010-12-09 | 2012-06-19 | 국방과학연구소 | System, apparatus and method for generating follower jamming signal |
| CN102916752A (en) * | 2012-05-07 | 2013-02-06 | 中国人民解放军国防科学技术大学 | Automatic generation method and device of complex interference |
| CN105376007A (en) * | 2015-10-09 | 2016-03-02 | 四川九洲电器集团有限责任公司 | Interference source device |
| WO2018032998A1 (en) * | 2016-08-16 | 2018-02-22 | 大唐移动通信设备有限公司 | Signal interference apparatus and method |
| CN110716214A (en) * | 2018-10-31 | 2020-01-21 | 北京北斗星通导航技术股份有限公司 | Signal processing method and device |
| CN110927683A (en) * | 2019-10-17 | 2020-03-27 | 南京国立电子科技有限公司 | Interference signal generating device and method thereof |
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