CN117331035A - Anti-space electronic investigation interference method and system - Google Patents
Anti-space electronic investigation interference method and system Download PDFInfo
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Abstract
The invention provides an anti-space electronic investigation interference method and system, wherein the method comprises the following steps: controlling the power of the transmitting signal and the power of the interference signal to be alternately arranged, and enabling the power difference to be larger than a preset value; dynamically adjusting the signal frequency of the interference signal waveform data, and controlling the frequency difference value to be in a preset frequency range; and combining the adjusted interference signal waveform data with the transmitted signal waveform data, and transmitting the combined interference signal waveform data through an antenna. The method has the advantages that the interference signal and the useful emission signal are output in a mode of alternating strength, so that the target object is difficult to distinguish the useful emission signal from the interference signal through threshold detection; the interference signal is dynamically adjusted, so that the phase discriminator of the target object is difficult to distinguish useful transmitting signals from interference signals, the interference effect is improved, interference is carried out by additionally setting waveform data of the interference signal, and the phase discriminator is beneficial to the transmission of the useful transmitting signals on the basis of preventing signal distortion.
Description
Technical Field
The invention relates to the technical field of radar data processing, in particular to an anti-space electronic investigation interference method and system.
Background
The detection technology mainly relies on the receiver of the detection equipment to test the incident angle of the signal source, and the testing methods include an amplitude measurement method, a phase measurement method and a time difference measurement method. The phase measurement method is to extract and calculate the phase difference of signals among channels through a phase discriminator group after measuring the frequency through instant frequency measurement (Instantaneous Frequency Measurement, IFM), and finally obtain the carrier frequency value of the signals, thereby realizing the determination of the position of a target object transmitter.
At present, the anti-investigation interference mode is mainly to process the useful emission signal by adding noise to the signal or adjusting the signal envelope mode so as to prevent investigation of the target object, but the mode can distort the useful signal and influence the transmission of the useful signal.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an anti-space electronic investigation interference method and system, and aims to solve the technical problems that in the prior art, signal interference can distort useful signals and influence useful signal transmission.
In order to achieve the above object, the present invention is achieved by the following technical scheme: an anti-space electronic investigation interference method comprises the following steps:
synchronously associating a radar transmitting source with an interference source of anti-reconnaissance equipment;
acquiring signal power of the transmitting source, frequency point information of transmitting signal waveform data and transmitting signal intensity;
according to the transmitting signal power of the transmitting source, controlling the interference signal power of the interference source to enable the difference value between the transmitting signal power and the interference signal power to be larger than a preset value, and controlling the transmitting signal power and the interference signal power to be alternately arranged above and below a preset parameter value;
obtaining interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal intensity of the transmission signal waveform data;
dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information, and controlling the signal frequency of the interference signal waveform data to be in a preset frequency range;
and combining the adjusted interference signal waveform data with the emission signal waveform data, and emitting through an antenna.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the steps of synchronously associating a radar transmitting source with an interference source of anti-reconnaissance equipment, generating interference signal waveform data based on useful transmitting signal waveform data, controlling the difference value between transmitting signal power and interference signal power to be larger than a preset value, and adopting an output mode of alternating strong and weak of the interference signal and the useful transmitting signal to enable a target object to be difficult to distinguish the useful transmitting signal from the interference signal through threshold detection; the method comprises the steps of generating corresponding interference signal waveform data based on frequency point information of the transmission signal waveform data, dynamically adjusting interference signals in the transmission process, controlling signal frequencies of the interference signal waveform data to be in a preset frequency range, enabling a phase discriminator of a target object to be difficult to distinguish useful transmission signals from interference signals, improving interference effects, and further improving interference effects by additionally setting the interference signal waveform data, being beneficial to transmission of useful transmission signals on the basis of preventing signal distortion.
According to an aspect of the foregoing technical solution, the step of dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information and controlling the signal frequency of the interference signal waveform data to be within a preset frequency range specifically includes:
judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data exceeds a first preset value, if the signal frequency of the current interference signal waveform data does not exceed the first preset value, outputting the current interference signal waveform data, and reducing the signal frequency to perform emission interference;
judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data is lower than a second preset value, if the signal frequency of the current interference signal waveform data is not lower than the second preset value, outputting the current interference signal waveform data, and increasing the signal frequency to perform emission interference.
According to an aspect of the foregoing technical solution, the step of dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information and controlling the signal frequency of the interference signal waveform data to be within a preset frequency range specifically includes:
acquiring a signal frequency point and a bandwidth of the transmitted signal waveform data, and obtaining an adjustable frequency range of the interference signal waveform data according to the following calculation formula, wherein the frequency range comprises a first preset value and a second preset value:
；
；
in the method, in the process of the invention,for said first preset value, +.>For said second preset value, +.>For the signal frequency point, < >>Is the bandwidth;
and dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information so as to control the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be smaller than the first preset value, and the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be larger than the second preset value.
According to an aspect of the above technical solution, the step of obtaining the interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal strength of the transmission signal waveform data specifically includes:
acquiring frequency point information and transmitting signal intensity of the transmitting source, and obtaining the waveform data of the interference signal according to the following calculation formula:
；
；
in the method, in the process of the invention,for the transmitted signal strength, < >>For the frequency of the ith frequency bin, +.>For the initial random phase, T is the signal period and T is the current time.
According to an aspect of the foregoing technical solution, the step of combining the adjusted interference signal waveform data with the transmit signal waveform data, and transmitting the combined interference signal waveform data through an antenna specifically includes:
respectively performing digital-to-analog conversion on the interference signal waveform data and the emission signal waveform data to form an interference analog signal and an emission analog signal;
amplifying and filtering the interference analog signals and the emission analog signals, and combining the amplified and filtered interference analog signals and the emission analog signals by a combiner to obtain combined signals;
and processing the combined signal through a power amplifier and transmitting the combined signal through an antenna.
According to an aspect of the foregoing technical solution, the step of controlling, according to the transmit signal power of the transmit source, the interference signal power of the interference source so that a difference between the transmit signal power and the interference signal power is greater than a preset value, and controlling the transmit signal power and the interference signal power to be alternately set up and down at a preset parameter value specifically includes:
controlling the interference signal power of the interference source to dynamically adjust the interference signal power in the upper and lower directions of a preset parameter value;
acquiring current interference signal power, and judging whether the interference signal power is larger than a preset parameter value or not;
if the interference signal power is larger than the preset parameter value, reducing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than the preset value;
and if the interference signal power is smaller than the preset parameter value, enhancing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than a preset value.
In another aspect, the present invention further provides an anti-space electronic investigation interference system, including:
the synchronous module is used for synchronously associating the transmitting source of the radar with the interference source of the anti-reconnaissance equipment;
the acquisition module is used for acquiring the signal power of the transmitting source, and frequency point information and transmitting signal intensity of transmitting signal waveform data;
the power adjusting module is used for controlling the interference signal power of the interference source according to the transmission signal power of the transmission source, enabling the difference value between the transmission signal power and the interference signal power to be larger than a preset value, and controlling the transmission signal power and the interference signal power to be alternately arranged above and below a preset parameter value;
the interference module is used for obtaining interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal intensity of the transmission signal waveform data;
the frequency adjusting module is used for dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information and controlling the signal frequency of the interference signal waveform data to be in a preset frequency range;
and the transmitting module is used for carrying out the combining processing on the adjusted interference signal waveform data and the transmitting signal waveform data and transmitting the interference signal waveform data through an antenna.
According to an aspect of the foregoing technical solution, the frequency adjustment module specifically includes:
the weakening unit is used for judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data exceeds a first preset value, outputting the current interference signal waveform data if the signal frequency of the current interference signal waveform data does not exceed the first preset value, and reducing the signal frequency to perform emission interference;
and the enhancement unit is used for judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data is lower than a second preset value, outputting the current interference signal waveform data if the signal frequency of the current interference signal waveform data is not lower than the second preset value, and increasing the signal frequency to perform emission interference.
According to an aspect of the foregoing technical solution, the frequency adjustment module is specifically configured to:
acquiring a signal frequency point and a bandwidth of the transmitted signal waveform data, and obtaining an adjustable frequency range of the interference signal waveform data according to the following calculation formula, wherein the frequency range comprises a first preset value and a second preset value:
；
；
dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information to control the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be smaller than the first preset value, and the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be larger than the second preset value;
in the method, in the process of the invention,for said first preset value, +.>For said second preset value, +.>For the signal frequency point, < >>For said bandwidth.
According to an aspect of the foregoing technical solution, the interference module is specifically configured to:
acquiring frequency point information and transmitting signal intensity of the transmitting source, and obtaining the waveform data of the interference signal according to the following calculation formula:
；
；
in the method, in the process of the invention,for the transmitted signal strength, < >>For the frequency of the ith frequency bin, +.>For the initial random phase, T is the signal period and T is the current time.
According to an aspect of the foregoing technical solution, the transmitting module is specifically configured to:
respectively performing digital-to-analog conversion on the interference signal waveform data and the emission signal waveform data to form an interference analog signal and an emission analog signal;
amplifying and filtering the interference analog signals and the emission analog signals, and combining the amplified and filtered interference analog signals and the emission analog signals by a combiner to obtain combined signals;
and processing the combined signal through a power amplifier and transmitting the combined signal through an antenna.
According to an aspect of the foregoing technical solution, the power adjustment module is specifically configured to:
controlling the interference signal power of the interference source to dynamically adjust the interference signal power in the upper and lower directions of a preset parameter value;
acquiring current interference signal power, and judging whether the interference signal power is larger than a preset parameter value or not;
if the interference signal power is larger than the preset parameter value, reducing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than the preset value;
and if the interference signal power is smaller than the preset parameter value, enhancing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than a preset value.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a method for anti-space electronic investigation interference in a first embodiment of the present invention;
fig. 2 is a block diagram of an IFM receiver according to the prior art;
FIG. 3 is a partial hardware architecture diagram of some application scenarios of an anti-space electronic investigation interference method in a first embodiment of the present invention;
FIG. 4 is a block diagram of an anti-space electronic investigation interference system in a second embodiment of the present invention;
description of main reference numerals:
the system comprises a synchronization module 100, an acquisition module 200, a power adjustment module 300, an interference module 400, a frequency adjustment module 500 and a transmission module 600.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Various embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a flowchart of an anti-space electronic detection interference method in a first embodiment of the invention is shown, comprising the following steps:
step S100, synchronizing and associating a radar transmitting source with an interference source of the anti-reconnaissance device. Specifically, after the system is powered on, the synchronization preprocessing is completed by establishing connection between the initial interference source and the signal source, and the synchronization can be implemented in a network synchronization mode or in other synchronization modes.
Step 200, obtaining the signal power of the transmitting source, and the frequency point information and the transmitting signal intensity of the transmitting signal waveform data. After the system is electrified, a request for acquiring the frequency point of the transmitting source is sent through the interference source so as to acquire the frequency point information and the transmitting signal strength of the transmitting signal waveform data.
Step S300, according to the transmission signal power of the transmission source, controlling the interference signal power of the interference source, so that the difference between the transmission signal power and the interference signal power is greater than a preset value, and controlling the transmission signal power and the interference signal power to be alternately set up and down at a preset parameter value.
As can be readily appreciated, fig. 2 is a block diagram of an IFM receiver in the prior art, which includes a limiting amplifier, a simultaneous arrival signal detector, a phase detector, a frequency divider, a threshold detection, and the like. The threshold detection is to directly discard the signal which is considered as important attention signal and is smaller than the set value by detecting the power which is larger than the set value, and the signal is not processed; when the interference signal power is weak, the useful signal is relatively strong; the difference value of the signal power of the two signals is always larger than a preset value, so that the threshold detection of the target object is difficult to distinguish the useful signal from the interference signal.
Specifically, in this embodiment, the step S300 specifically includes:
step S310, controlling the interference signal power of the interference source to dynamically adjust up and down in the preset parameter value;
step S320, obtaining the current interference signal power and judging whether the interference signal power is larger than a preset parameter value or not;
step S330, if the interference signal power is greater than the preset parameter value, reducing the signal power of the transmitting source, so that the difference between the transmitting signal power and the interference signal power is greater than a preset value;
step S340, if the interference signal power is smaller than the preset parameter value, enhancing the signal power of the transmitting source, so that the difference between the transmitting signal power and the interference signal power is larger than the preset value.
It can be appreciated that, in some embodiments, the step S310 may further dynamically adjust the transmit signal power of the transmitting source above and below a preset parameter value, so as to correspondingly adjust the interference signal power in a subsequent step according to the transmit signal power.
In some embodiments, the preset values and the preset parameter values may be adjusted according to practical situations, for example, when the preset parameter value is-55 dB and the preset value is 7dB, the signal power of the useful signal is-50 dB, the signal power of the interference signal is-57 dB, and conversely, when the signal power of the useful signal is-57 dB, the interference signal may be-50 dB.
Step S400, obtaining interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal intensity of the transmission signal waveform data.
Specifically, in this embodiment, the step S400 specifically includes:
step S410, obtaining frequency point information and transmission signal strength of the transmission source, and obtaining the interference signal waveform data according to the following calculation formula:
；
；
in the method, in the process of the invention,for the transmitted signal strength, < >>For the frequency of the ith frequency bin, +.>For the initial random phase, T is the signal period and T is the current time.
Step S500, dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information, and controlling the signal frequency of the interference signal waveform data to be in a preset frequency range.
Furthermore, the most important part of the IFM receiver in the prior art is to extract the channel signal phase difference through the phase discriminator, calculate the carrier frequency value of the obtained signal, and if the phase difference between the own useful transmitting signal frequency point and the interference signal frequency point is too large, the signal is easily identified by the other party and is purposefully filtered. According to the method, the signal frequency of the interference signal waveform data is dynamically adjusted based on the frequency point information of the emission signal waveform data, the difference value of the two is controlled to be in the preset frequency range, and when the two enter the opposite detection system at the same time, the object phase detector cannot easily identify which frequency point is a useful signal and which frequency point is an interference signal, so that the anti-detection effect is improved.
Specifically, in this embodiment, the step S500 specifically includes:
step S510, determining whether the difference between the signal frequency of the current interference signal waveform data and the signal frequency of the transmitting signal waveform data exceeds a first preset value, if the signal frequency of the current interference signal waveform data does not exceed the first preset value, outputting the current interference signal waveform data, and reducing the signal frequency to perform transmitting interference.
Step S520, determining whether the difference between the signal frequency of the current interference signal waveform data and the signal frequency of the transmitting signal waveform data is lower than a second preset value, if the signal frequency of the current interference signal waveform data is not lower than the second preset value, outputting the current interference signal waveform data, and raising the signal frequency to perform transmitting interference.
Further, in this embodiment, the step S500 further includes:
step S530, obtaining a signal frequency point and a bandwidth of the transmitted signal waveform data, and obtaining an adjustable frequency range of the interference signal waveform data according to the following calculation formula, where the frequency range includes a first preset value and a second preset value:
；
；
in the method, in the process of the invention,for said first preset value, +.>For said second preset value, +.>For the signal frequency point, < >>Is the bandwidth;
and dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information so as to control the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be smaller than the first preset value, and the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be larger than the second preset value.
And step S600, combining the adjusted interference signal waveform data with the transmission signal waveform data, and transmitting the combined interference signal waveform data through an antenna.
Specifically, in this embodiment, the step S600 specifically includes: respectively performing digital-to-analog conversion on the interference signal waveform data and the emission signal waveform data to form an interference analog signal and an emission analog signal;
amplifying and filtering the interference analog signals and the emission analog signals, and combining the amplified and filtered interference analog signals and the emission analog signals by a combiner to obtain combined signals;
and processing the combined signal through a power amplifier and transmitting the combined signal through an antenna.
As shown in fig. 3, the hardware structure diagram of some application scenarios in this embodiment is as follows: as shown in fig. 3, the above-mentioned interference signal waveform data and emission signal waveform data can be generated by CPU or FPGA, where the above-mentioned N-channel waveform data includes one or more channels of own interference signals and useful signals, where N DAC chips are used to perform digital-to-analog conversion to form analog signal waveforms, and the analog signal waveforms are subjected to primary amplification and filtering, and the filtered waveforms enter a combiner, where N channels of waveforms and one channel of signals are amplified by a power amplifier and finally emitted to space by an antenna.
In summary, in the anti-space electronic detection interference method in the above embodiment of the present invention, the transmitting source of the radar and the interference source of the anti-detection device are synchronously associated, and interference signal waveform data is generated based on useful transmitting signal waveform data, and meanwhile, the difference between the transmitting signal power and the interference signal power is controlled to be greater than a preset value, and the output mode of alternating strong and weak of the interference signal and the useful transmitting signal is adopted, so that the target object is difficult to distinguish the useful transmitting signal from the interference signal through threshold detection; the method comprises the steps of generating corresponding interference signal waveform data based on frequency point information of the transmission signal waveform data, dynamically adjusting interference signals in the transmission process, controlling signal frequencies of the interference signal waveform data to be in a preset frequency range, enabling a phase discriminator of a target object to be difficult to distinguish useful transmission signals from interference signals, improving interference effects, and further improving interference effects by additionally setting the interference signal waveform data, being beneficial to transmission of useful transmission signals on the basis of preventing signal distortion.
Referring to fig. 4, a block diagram of an anti-space electronic detection interference system according to a second embodiment of the present invention is shown, where the anti-space electronic detection interference system includes:
the synchronization module 100 is configured to synchronize and associate a transmitting source of the radar with an interference source of the anti-reconnaissance device;
the acquisition module 200 is configured to acquire signal power of the transmitting source, frequency point information of transmitting signal waveform data, and transmitting signal strength;
the power adjustment module 300 is configured to control, according to a transmit signal power of the transmit source, an interference signal power of the interference source, so that a difference between the transmit signal power and the interference signal power is greater than a preset value, and control the transmit signal power and the interference signal power to be alternately set up and down above and below a preset parameter value;
the interference module 400 is configured to obtain interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal strength of the transmission signal waveform data;
the frequency adjustment module 500 is configured to dynamically adjust the signal frequency of the interference signal waveform data according to the frequency point information, and control the signal frequency of the interference signal waveform data to be within a preset frequency range;
and the transmitting module 600 is configured to perform a combining process on the adjusted interference signal waveform data and the transmitting signal waveform data, and transmit the interference signal waveform data through an antenna.
Preferably, in some embodiments, the frequency adjustment module 500 specifically includes:
the weakening unit is used for judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data exceeds a first preset value, outputting the current interference signal waveform data if the signal frequency of the current interference signal waveform data does not exceed the first preset value, and reducing the signal frequency to perform emission interference;
and the enhancement unit is used for judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data is lower than a second preset value, outputting the current interference signal waveform data if the signal frequency of the current interference signal waveform data is not lower than the second preset value, and increasing the signal frequency to perform emission interference.
Preferably, in some embodiments, the frequency adjustment module 500 is specifically configured to:
acquiring a signal frequency point and a bandwidth of the transmitted signal waveform data, and obtaining an adjustable frequency range of the interference signal waveform data according to the following calculation formula, wherein the frequency range comprises a first preset value and a second preset value:
；
；
in the method, in the process of the invention,for said first preset value, +.>For said second preset value, +.>For the signal frequency point, < >>Is the bandwidth;
and dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information so as to control the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be smaller than the first preset value, and the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be larger than the second preset value.
Preferably, in some embodiments, the interference module 400 is specifically configured to:
acquiring frequency point information and transmitting signal intensity of the transmitting source, and obtaining the waveform data of the interference signal according to the following calculation formula:
；
；
in the method, in the process of the invention,for the transmitted signal strength, < >>For the frequency of the ith frequency bin, +.>For the initial random phase, T is the signal period and T is the current time.
Preferably, in some embodiments, the transmitting module 600 is specifically configured to:
respectively performing digital-to-analog conversion on the interference signal waveform data and the emission signal waveform data to form an interference analog signal and an emission analog signal;
amplifying and filtering the interference analog signals and the emission analog signals, and combining the amplified and filtered interference analog signals and the emission analog signals by a combiner to obtain combined signals;
and processing the combined signal through a power amplifier and transmitting the combined signal through an antenna.
Preferably, in some embodiments, the power adjustment module 300 is specifically configured to:
controlling the interference signal power of the interference source to dynamically adjust the interference signal power in the upper and lower directions of a preset parameter value;
acquiring current interference signal power, and judging whether the interference signal power is larger than a preset parameter value or not;
if the interference signal power is larger than the preset parameter value, reducing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than the preset value;
and if the interference signal power is smaller than the preset parameter value, enhancing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than a preset value.
In summary, in the anti-space electronic reconnaissance interference system in the above embodiment of the present invention, the synchronization module 100 is used to synchronize the transmitting source of the radar with the interference source of the anti-reconnaissance device, the acquisition module 200 is used to generate the interference signal waveform data based on the useful transmitting signal waveform data, and the power adjustment module 300 is used to control the difference between the transmitting signal power and the interference signal power to be greater than the preset value, and the output mode of alternating the intensity of the interference signal and the useful transmitting signal is adopted, so that the target object is difficult to distinguish the useful transmitting signal from the interference signal through threshold detection; the interference module 400 is used for generating corresponding interference signal waveform data based on frequency point information of the transmission signal waveform data, meanwhile, the interference signal is dynamically adjusted in the transmission process, the frequency adjusting module 500 is used for controlling the signal frequency of the interference signal waveform data to be located in a preset frequency range, so that a phase discriminator of a target object is difficult to distinguish useful transmission signals and interference signals, the interference effect is improved, the interference signal waveform data are additionally arranged, on the basis of preventing signal distortion, transmission of useful transmission signals is facilitated, since a reconnaissance device at a receiving end of the target object can be used for timely measuring own-frequency radar electromagnetic radiation sources through IFMs, when own-side position information is acquired, processing can only be carried out on single signals, a plurality of signals are transmitted in a combined way through the transmission module 600, when a plurality of signals arrive at the same time, the frequency measurement result of a receiving end can be seriously affected even have errors, and the interference effect can be further improved by respectively generating the transmission signal waveform data and the interference signal waveform data and transmitting the interference signal waveform data after combining the interference signal waveform data, and the reconnaissance effect is further improved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that various modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the present invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. An anti-space electronic investigation interference method is characterized by comprising the following steps:
synchronously associating a radar transmitting source with an interference source of anti-reconnaissance equipment;
acquiring signal power of the transmitting source, frequency point information of transmitting signal waveform data and transmitting signal intensity;
according to the transmitting signal power of the transmitting source, controlling the interference signal power of the interference source to enable the difference value between the transmitting signal power and the interference signal power to be larger than a preset value, and controlling the transmitting signal power and the interference signal power to be alternately arranged above and below a preset parameter value;
obtaining interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal intensity of the transmission signal waveform data;
dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information so as to control the difference value between the signal frequency value of the interference signal waveform data and the signal frequency value of the emission signal waveform data to be in a preset frequency range;
and combining the adjusted interference signal waveform data with the emission signal waveform data, and emitting through an antenna.
2. The method of claim 1, wherein the step of dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information to control the difference between the signal frequency value of the interference signal waveform data and the signal frequency value of the transmission signal waveform data to be within a preset frequency range specifically comprises:
judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data exceeds a first preset value, if the signal frequency of the current interference signal waveform data does not exceed the first preset value, outputting the current interference signal waveform data, and reducing the signal frequency to perform emission interference;
judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data is lower than a second preset value, if the signal frequency of the current interference signal waveform data is not lower than the second preset value, outputting the current interference signal waveform data, and increasing the signal frequency to perform emission interference.
3. The method of claim 1, wherein the step of dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information to control the difference between the signal frequency value of the interference signal waveform data and the signal frequency value of the transmission signal waveform data to be within a preset frequency range specifically comprises:
acquiring a signal frequency point and a bandwidth of the transmitted signal waveform data, and obtaining an adjustable frequency range of the interference signal waveform data according to the following calculation formula, wherein the frequency range comprises a first preset value and a second preset value:
；
；
in the method, in the process of the invention,for said first preset value, +.>For said second preset value, +.>For the signal frequency point, < >>Is the bandwidth;
and dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information so as to control the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be smaller than the first preset value, and the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be larger than the second preset value.
4. The method of claim 1, wherein the step of obtaining the interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal strength of the transmission signal waveform data specifically comprises:
acquiring frequency point information and transmitting signal intensity of the transmitting source, and obtaining the waveform data of the interference signal according to the following calculation formula:
；
；
in the method, in the process of the invention,for the transmitted signal strength, < >>For the frequency of the ith frequency bin, +.>For the initial random phase, T is the signal period and T is the current time.
5. The method of claim 1, wherein the step of combining the adjusted interference signal waveform data with the transmit signal waveform data and transmitting via an antenna specifically comprises:
respectively performing digital-to-analog conversion on the interference signal waveform data and the emission signal waveform data to form an interference analog signal and an emission analog signal;
amplifying and filtering the interference analog signals and the emission analog signals, and combining the amplified and filtered interference analog signals and the emission analog signals by a combiner to obtain combined signals;
and processing the combined signal through a power amplifier and transmitting the combined signal through an antenna.
6. The method for inverse spatial electronic investigation of interference according to claim 1, wherein the step of controlling the interference signal power of the interference source according to the transmission signal power of the transmission source so that a difference between the transmission signal power and the interference signal power is greater than a preset value, and controlling the transmission signal power and the interference signal power to be alternately set up and down at preset parameter values specifically comprises:
controlling the interference signal power of the interference source to dynamically adjust the interference signal power in the upper and lower directions of a preset parameter value;
acquiring current interference signal power, and judging whether the interference signal power is larger than a preset parameter value or not;
if the interference signal power is larger than the preset parameter value, reducing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than the preset value;
and if the interference signal power is smaller than the preset parameter value, enhancing the signal power of the transmitting source so that the difference value between the transmitting signal power and the interference signal power is larger than a preset value.
7. An anti-space electronic investigation interference system, comprising:
the synchronous module is used for synchronously associating the transmitting source of the radar with the interference source of the anti-reconnaissance equipment;
the acquisition module is used for acquiring the signal power of the transmitting source, and frequency point information and transmitting signal intensity of transmitting signal waveform data;
the power adjusting module is used for controlling the interference signal power of the interference source according to the transmission signal power of the transmission source, enabling the difference value between the transmission signal power and the interference signal power to be larger than a preset value, and controlling the transmission signal power and the interference signal power to be alternately arranged above and below a preset parameter value;
the interference module is used for obtaining interference signal waveform data based on the interference signal power according to the frequency point information and the transmission signal intensity of the transmission signal waveform data;
the frequency adjusting module is used for dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information so as to control the difference value between the signal frequency value of the interference signal waveform data and the signal frequency value of the emission signal waveform data to be in a preset frequency range;
and the transmitting module is used for carrying out the combining processing on the adjusted interference signal waveform data and the transmitting signal waveform data and transmitting the interference signal waveform data through an antenna.
8. The anti-spatial electronic investigation interference system according to claim 7, wherein the frequency adjustment module specifically comprises:
the weakening unit is used for judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data exceeds a first preset value, outputting the current interference signal waveform data if the signal frequency of the current interference signal waveform data does not exceed the first preset value, and reducing the signal frequency to perform emission interference;
and the enhancement unit is used for judging whether the difference value between the signal frequency of the current interference signal waveform data and the signal frequency of the emission signal waveform data is lower than a second preset value, outputting the current interference signal waveform data if the signal frequency of the current interference signal waveform data is not lower than the second preset value, and increasing the signal frequency to perform emission interference.
9. The anti-spatial electronic investigation interference system according to claim 7 or 8, wherein the frequency adjustment module is specifically configured to:
acquiring a signal frequency point and a bandwidth of the transmitted signal waveform data, and obtaining an adjustable frequency range of the interference signal waveform data according to the following calculation formula, wherein the frequency range comprises a first preset value and a second preset value:
；
；
dynamically adjusting the signal frequency of the interference signal waveform data according to the frequency point information to control the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be smaller than the first preset value, and the difference value between the signal frequency of the interference signal waveform data and the signal frequency of the transmission signal waveform data to be larger than the second preset value;
in the method, in the process of the invention,for said first preset value, +.>For said second preset value, +.>For the signal frequency point, < >>For said bandwidth.
10. The anti-spatial electronic investigation interference system of claim 7, wherein the interference module is specifically configured to:
acquiring frequency point information and transmitting signal intensity of the transmitting source, and obtaining the waveform data of the interference signal according to the following calculation formula:
；
；
in the method, in the process of the invention,for the transmitted signal strength, < >>For the frequency of the ith frequency bin, +.>For the initial random phase, T is the signal period and T is the current time.
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