CN111679252A - Method and device for resisting digital radio frequency storage interference, electronic equipment and storage medium - Google Patents
Method and device for resisting digital radio frequency storage interference, electronic equipment and storage medium Download PDFInfo
- Publication number
- CN111679252A CN111679252A CN202010570824.8A CN202010570824A CN111679252A CN 111679252 A CN111679252 A CN 111679252A CN 202010570824 A CN202010570824 A CN 202010570824A CN 111679252 A CN111679252 A CN 111679252A
- Authority
- CN
- China
- Prior art keywords
- pulse signal
- code element
- shift keying
- modulation mode
- phase jump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The application provides a method and a device for resisting digital radio frequency storage interference, electronic equipment and a computer readable storage medium, wherein the method comprises the following steps: adding digital watermarks to the two adjacent pulse signals based on a multivariate position phase shift keying technology; the two pulse signals are offset corresponding to the target echo to obtain a residual echo; and determining an actual echo signal from the residual echo according to the phase jump variable specified in the digital watermark. According to the embodiment of the application, the digital watermark is actively added to the pulse signal, so that interference signals generated by a data radio frequency storage technology can be effectively avoided.
Description
Technical Field
The present application relates to the field of radar anti-interference technologies, and in particular, to a method and an apparatus for countering digital radio frequency storage interference, an electronic device, and a computer-readable storage medium.
Background
Radars are electronic devices that detect objects using electromagnetic waves. The radar can emit electromagnetic waves to irradiate a target and receive target echoes of the electromagnetic waves reflected by the target, so that information such as the distance, the distance change rate (radial speed), the azimuth and the height of the target and the radar can be obtained.
Digital Radio Frequency Memory (DRFM) technology can convert radar signals from analog signals to digital signals, store the digital signals, modulate and process the digital signals into specific interference signals, and finally transmit the interference signals to interfere radar.
Generally, after the radar receiver receives the echo signal, the interference signal may be separated by an interference separation technique. However, such passive anti-jamming techniques have difficulty ensuring the ability of the radar to operate in complex electromagnetic environments.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method and an apparatus for countering digital radio frequency storage interference, a computer readable storage medium, and an electronic medium, which are used to countering interference signals generated by data radio frequency storage technology.
In one aspect, the present application provides a method for countering digital radio frequency storage interference, including:
adding digital watermarks to the two adjacent pulse signals based on a multivariate position phase shift keying technology;
the two pulse signals are offset corresponding to the target echo to obtain a residual echo;
and determining an actual echo signal from the residual echo according to the phase jump variable specified in the digital watermark.
In one embodiment, the adding digital watermark to two adjacent pulse signals based on the multivariate position-phase shift keying technology includes:
generating a symbol sequence for two adjacent pulse signals; wherein the two pulse signals comprise a first pulse signal and a second pulse signal;
modulating a first pulse signal according to a first modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
In one embodiment, the adding digital watermark to two adjacent pulse signals based on the multivariate position-phase shift keying technology includes:
selecting a designated code element for two adjacent pulse signals; wherein the designated code element is any code element except zero in the code element which can be expressed by the multi-element position phase shift keying technology;
modulating a first pulse signal according to a first modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
In an embodiment, the method further comprises:
determining a two-way echo time delay from the actual echo signal.
In an embodiment, before the adding digital watermarks to the two adjacent pulse signals based on the multivariate position-phase-shift keying technique, the method further comprises:
and determining the appointed phase jump variable according to a preset quantization parameter.
In another aspect, the present application further provides a countermeasure device for digital radio frequency storage interference, including:
the adding module is used for adding digital watermarks to the two adjacent pulse signals based on a multi-element position phase shift keying technology;
the processing module is used for canceling the target echoes corresponding to the two pulse signals to obtain residual echoes;
and the determining module is used for determining an actual echo signal from the residual echo according to the phase jump variable specified in the digital watermark.
In an embodiment, the adding module is further configured to:
generating a symbol sequence for two adjacent pulse signals; wherein the two pulse signals comprise a first pulse signal and a second pulse signal;
modulating a first pulse signal according to a first modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
In an embodiment, the adding module is further configured to:
selecting a designated code element for two adjacent pulse signals; wherein the designated code element is any code element except zero in the code element which can be expressed by the multi-element position phase shift keying technology;
modulating a first pulse signal according to a first modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
Further, the present application also provides an electronic device, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to execute the method for countering the digital radio frequency memory interference.
In addition, the present application also provides a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program can be executed by a processor to execute the method for countering the digital radio frequency storage interference.
In the embodiment of the application, the radar can add the digital watermark in two adjacent pulse signals, after receiving the target echoes of the pulse signals, two target echoes can be cancelled to obtain residual echoes, and the actual echo signals are determined from the residual echoes according to the phase jump variable specified in the digital watermark, so that interference signals generated by a data radio frequency storage technology are effectively avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2 is a schematic flowchart illustrating a method for countering digital radio frequency storage interference according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a countermeasure apparatus for digital radio frequency storage interference according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, an electronic device 1 provided in an embodiment of the present application includes: at least one processor 11 and a memory 12, one processor 11 being exemplified in fig. 1. The processor 11 and the memory 12 are connected by a bus 10, and the memory 12 stores instructions executable by the processor 11, and the instructions are executed by the processor 11, so that the electronic device 1 can execute all or part of the flow of the method in the embodiments described below. In an embodiment, the electronic device 1 may be a radar.
The Memory 12 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk.
The present application also provides a computer-readable storage medium, which stores a computer program executable by the processor 11 to perform the method for countering digital radio frequency storage interference provided by the present application.
Referring to fig. 2, a flow chart of a method for countering digital radio frequency storage interference according to an embodiment of the present application is shown in fig. 2, where the method may include the following steps 210 to 230.
Step 210: and adding digital watermarks to the two adjacent pulse signals based on a multivariate position phase shift keying technology.
The M-ray position Phase Shift Keying (MPPSK) is a digital Phase modulation method, and distinguishes different symbols by modulating different symbol information at different time positions of a carrier.
In one embodiment, in one symbol period, the multivariate PSK modulated signal can be represented by the following equation (1):
wherein f iscRepresenting the carrier frequency, Tc＝1/fcRepresents a carrier period; n is the number of carrier cycles contained in a symbol period, in other words, one symbol period is NTc；
The arc of the phase jump is represented,
k represents the maximum number of cycles in which phase jump occurs in one symbol period, and K/N represents the modulation duty ratio; r isgIs a symbol guard interval control factor, r is more than or equal to 0g<1; k is 0,1,2, …, M-1, and represents an M-ary symbol to be transmitted, and M is 2 or more.
Digital watermarks are phase jumps that exist after modulation of a pulse signal on a carrier.
In one embodiment, the pulse signal transmitted by the radar can be represented by the following formula (2):
wherein T represents a pulse width; j represents a complex number; f. ofcRepresents a carrier frequency; mu represents the chirp slope; i denotes a Pulse Repetition Interval (PRI) number, and i is 1,2,3, … …, n. Formula (2) shows that the pulse signals transmitted by the radar at different pulse repetition intervals are the same.
The radar can take every two adjacent pulse signals as an interference suppression signal group, and modulate the pulse signals in the interference suppression signal group through multivariate position phase shift keying respectively, so that digital watermarks are added to the pulse signals.
One pulse signal may include one symbol or may include a plurality of symbols.
In one embodiment, the pulse width and the symbol period of the pulse signals in the interference suppression signal group are the same, and one pulse signal includes one symbol.
The radar can select a designated symbol from a plurality of symbols which can be expressed by the multi-element position phase shift keying for the interference suppression signal group, and modulate the first pulse signal based on a first modulation mode corresponding to the designated symbol. The designated code element is any one code element except 0 which can be expressed by multi-element position phase shift keying, and the first pulse signal refers to the first pulse signal in the interference suppression signal group; the first modulation mode refers to a mode for modulating a first pulse signal in the preconfigured multivariate position phase shift keying.
The radar can modulate the second pulse signal based on a second debugging mode corresponding to the specified code element. The second pulse signal refers to a second pulse signal in the interference suppression signal group; the second modulation scheme refers to a scheme for modulating the second pulse signal in preconfigured multivariate position phase shift keying.
The phase jump variable in the first modulation scheme may be regarded as a specified phase jump variable, and the phase jump variable in the second modulation scheme may be an inverse number of the specified phase jump variable.
Taking the multiple-element phase shift keying shown in the above formula (1) as an example, if M is 3, the multiple-element phase shift keying can express symbols including 0,1, and 2.
The radar can select 1 or 2 as a designated symbol, and modulate the first pulse signal in the interference suppression signal group in a modulation mode corresponding to the designated symbol. At this time, the phase jump amount is
The phase jump variable is considered to be a specified phase jump variable. This modulation scheme may be considered as a first modulation scheme.
The radar can change the phase jump variable in the first modulation mode
And modulating a second pulse signal in the interference suppression signal group based on the changed phase jump variable. At this time, the debugging mode after changing the phase jump variable can be regarded as the second modulationAnd (4) trial mode.
In another embodiment, the pulse width of the pulse signal in the interference suppression signal group is an integer multiple of the symbol period, and in this case, one pulse signal includes a plurality of symbols.
The radar may generate a sequence of symbols for two adjacent pulse signals. Wherein, the code element sequence includes a plurality of code elements which can be expressed by multi-element position phase shift keying. The radar may randomly generate the sequence of symbols and store the sequence of symbols. For example, one pulse signal may include 20 symbols, the multiple-element position phase shift keying may express 9 symbols, and the radar may select at least 2 symbols from the 9 symbols and then randomly arrange to generate a 20-bit symbol sequence.
The radar can modulate the first pulse signal according to a first modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain the first pulse signal added with the digital watermark. Wherein, the first pulse signal refers to the first pulse signal in the interference suppression signal group; the first modulation mode refers to a mode for modulating a first pulse signal in the preconfigured multivariate position phase shift keying. When the first pulse signal is modulated, the modulation mode corresponding to each code element in the code element sequence is regarded as the first modulation mode.
The radar can modulate the second pulse signal according to a second modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain the second pulse signal added with the digital watermark. The second pulse signal refers to a second pulse signal in the interference suppression signal group; the second modulation scheme refers to a scheme for modulating the second pulse signal in preconfigured multivariate position phase shift keying. When the second pulse signal is modulated, the modulation mode corresponding to each code element in the code element sequence is regarded as the second modulation mode.
The phase jump variable in the first modulation scheme may be regarded as a specified phase jump variable, and the phase jump variable in the second modulation scheme may be an inverse number of the specified phase jump variable.
Taking the multi-source position phase shift keying shown in the above formula (1) as an example, if M is 10, the symbols that can be expressed by the multi-source position phase shift keying include 0,1,2, 3, 4, 5, 6, 7, 8, 9. One pulse signal may comprise 5 symbols and the radar generates a sequence of symbols 74693 for the set of interference rejection signals.
The radar may sequentially select a modulation mode corresponding to each symbol in the symbol sequence 74693 in equation (1) to modulate the first pulse signal, so as to obtain the first pulse signal added with the digital watermark. At this time, the phase jump amount is
The phase jump variable is considered to be a specified phase jump variable. The modulation scheme corresponding to each symbol may be considered as a first modulation scheme.
The radar can change the phase jump amount in the modulation mode corresponding to each code element into
And modulating the second pulse signal in the interference suppression signal group based on the modulation mode after the phase jump variable is changed, thereby obtaining the second pulse signal added with the digital watermark. At this time, the modulation scheme after changing the phase jump variable may be regarded as the second modulation scheme.
In one embodiment, after the radar generates the symbol sequence for the impulse signals in the interference suppression signal set, a sequence of sample points corresponding to the symbol sequence may be generated. The sampling point sequence is used for indicating the position of the pulse signal as a digital signal in a carrier wave and a code element to which the sampling point of the pulse signal belongs. Illustratively, a symbol corresponds to 300 sampling points, and the number indicated by the symbol is 7, then the number in the sequence of sampling points corresponding to the 300 sampling points is 7. In addition, if the number indicated by the symbol is 7 and the symbol belongs to the second pulse signal, the number corresponding to the 300 sampling points corresponding to the symbol in the sampling point sequence may be-7.
Therefore, the radar can determine the modulation scheme selected for the digital signal (pulse signal), the phase jump amount, and the sampling point of the digital signal to be modulated, based on the sampling point sequence.
After modulation processing, the pulse signal transmitted by the radar can be represented by the following formula (3):
wherein T represents a pulse width; j represents a complex number; mu represents the chirp slope; sM(t) denotes a modulated carrier.
Step 220: and the two pulse signals are offset corresponding to the target echo to obtain a residual echo.
Ignoring the doppler frequency, the target echo of the pulse signal can be represented by the following equation (4):
wherein, Δ t1Representing the two-way propagation delay of the target echo, and T represents the pulse width; j represents a complex number; μ denotes the chirp rate.
After the radar transmits the pulse signals added with the digital watermarks in the interference suppression signal group, target echoes corresponding to the two pulse signals can be received. Two target echoes received by the radar can be represented by the following formula (5) and formula (6), respectively:
r1(t)＝s1(t-Δt1)+aj(t-Δt1)+n1(t) (5)
r2(t)＝s2(t-Δt1)+aj(t-Δt1)+n2(t) (6)
wherein, Δ t1Representing the two-way propagation delay of the target echo, α modulation factor representing the interference greater than a multiple of the signal, n1(t) and n2(t) represents white gaussian noise; s1(t-Δt1) Representing the actual echo signal of the first pulse signal, s2(t-Δt1) Representing the actual echo signal of the second pulse signal.
In general, the interference signals transmitted at each pulse repetition interval by digital radio frequency memory technology are the same. The target echo received by the radar comprises an interference signal and white gaussian noise.
The radar can cancel the two target echoes to eliminate interference signals and obtain residual echo signals. The residual echo signal can be expressed by the following equation (7):
z(t)＝s1(t-Δt1)-s2(t-Δt1)+n1(t)-n2(t) (7)
wherein n is1(t) and n2(t) represents white gaussian noise; s1(t-Δt1) Representing the actual echo signal of the first pulse signal, s2(t-Δt1) Representing the actual echo signal of the second pulse signal.
In one case, if the digital watermark is not added to the first pulse signal and the second pulse signal, the actual echo signals of the first pulse signal and the second pulse signal are the same, and only white gaussian noise exists in the residual echo signals. This case is not considered.
Alternatively, if the first pulse signal and the second pulse signal are digitally watermarked as described above, the residual echo signal can be represented by the following equation (8):
wherein s isr(t) is the target echo shown in formula (4);
a specified phase jump variable is obtained; j represents a complex number; n is1(t) and n2(t) represents white gaussian noise.
Step 230: and determining an actual echo signal from the residual echo according to the phase jump variable specified in the digital watermark.
Gaussian white noise can be ignored in the residual echo signals, and the radar can determine the actual echo signals from the residual echoes according to the specified phase jump variable in the digital watermark.
Taking equation (8) as an example, knowing the complex number j and the specified phase jump variable
The radar can determine the actual echo signal sr(t)。
Through the above-mentioned methods of steps 210 to 230, the radar can eliminate the influence of the interference signal, and obtain the actual echo signal of the pulse signal transmitted by the radar.
In one embodiment, after determining the actual echo signal, the radar may determine a two-way echo delay from the actual echo signal. Subsequent radars may determine the range of the target from itself based on the two-way echo delay. Taking formula (3) and formula (4) as examples, formula (3) is a pulse signal transmitted by a radar, and formula (4) is a target echo of the pulse signal, that is, an actual echo signal. The radar can determine the two-way echo time delay according to the difference of the two.
In one embodiment, the radar may determine the specified phase jump variable according to a preset quantization parameter before performing step 210. The quantitative parameters are parameters used by the predicted attacker in sampling the radar signals.
According to the principle of phase quantization DRFM, an attacker divides one period of a sinusoidal signal into 2 when quantizing according to the A bits phaseAPhase intervals, in other words intervals of 2 pi/2 phase quantizationA. Here, a is a quantization parameter, which may be an empirical value such as 12, 14, 16, etc.
The radar can make the appointed phase jump less than 2 pi/2AAt this time, the attacker cannot perceive the phase jump variable when sampling the pulse signal. In this case, after the radar modulates the pulse signal according to the specified phase jump amount, an attacker cannot perceive the digital watermark and only continuously transmits the same interference signal.
In the case that the digital watermark is not perceived by an attacker who passes through the phase quantization DRFM, the above-mentioned specified phase jump amount is also not perceived by the attacker who quantizes the amplitude DRFM.
By the measures, the radar can determine the specified phase jump variable for adding the digital watermark to the pulse signal, so that an attacker cannot perceive the digital watermark.
Fig. 3 is a block diagram of an apparatus for countering digital radio frequency storage interference according to an embodiment of the present invention, as shown in fig. 3, the apparatus may include:
and an adding module 310, configured to add a digital watermark to two adjacent pulse signals based on a multivariate position-phase-shift keying technique.
And the processing module 320 is configured to cancel the target echo corresponding to the two pulse signals to obtain a residual echo.
A determining module 330, configured to determine an actual echo signal from the residual echo according to a phase jump variable specified in the digital watermark.
In an embodiment, the adding module 310 is further configured to:
generating a symbol sequence for two adjacent pulse signals; wherein the two pulse signals comprise a first pulse signal and a second pulse signal;
modulating a first pulse signal according to a first modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
In an embodiment, the adding module 310 is further configured to:
selecting a designated code element for two adjacent pulse signals; wherein the designated code element is any code element except zero in the code element which can be expressed by the multi-element position phase shift keying technology;
modulating a first pulse signal according to a first modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
In an embodiment, the determining module 330 is further configured to:
determining a two-way echo time delay from the actual echo signal.
In an embodiment, the determining module 330 is further configured to:
and determining the appointed phase jump variable according to a preset quantization parameter.
The implementation process of the functions and actions of each module in the above device is specifically described in the implementation process of the corresponding step in the countermeasure method for digital radio frequency storage interference, and is not described herein again.
In the embodiments provided in the present application, the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (10)
1. A method for countering digital radio frequency storage interference, comprising:
adding digital watermarks to the two adjacent pulse signals based on a multivariate position phase shift keying technology;
the two pulse signals are offset corresponding to the target echo to obtain a residual echo;
and determining an actual echo signal from the residual echo according to the phase jump variable specified in the digital watermark.
2. The method of claim 1, wherein the adding digital watermarks to two adjacent pulse signals based on the multivariate position-phase shift keying technique comprises:
generating a symbol sequence for two adjacent pulse signals; wherein the two pulse signals comprise a first pulse signal and a second pulse signal;
modulating a first pulse signal according to a first modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
3. The method of claim 1, wherein the adding digital watermarks to two adjacent pulse signals based on the multivariate position-phase shift keying technique comprises:
selecting a designated code element for two adjacent pulse signals; wherein the designated code element is any code element except zero in the code element which can be expressed by the multi-element position phase shift keying technology;
modulating a first pulse signal according to a first modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
4. The method of claim 1, further comprising:
determining a two-way echo time delay from the actual echo signal.
5. The method of claim 1, wherein before the adding digital watermarks to the two adjacent pulse signals based on the multivariate position-phase-shift keying technique, the method further comprises:
and determining the appointed phase jump variable according to a preset quantization parameter.
6. An apparatus for countering digital radio frequency memory interference (DLC), comprising:
the adding module is used for adding digital watermarks to the two adjacent pulse signals based on a multi-element position phase shift keying technology;
the processing module is used for canceling the target echoes corresponding to the two pulse signals to obtain residual echoes;
and the determining module is used for determining an actual echo signal from the residual echo according to the phase jump variable specified in the digital watermark.
7. The apparatus of claim 6, wherein the adding module is further configured to:
generating a symbol sequence for two adjacent pulse signals; wherein the two pulse signals comprise a first pulse signal and a second pulse signal;
modulating a first pulse signal according to a first modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to each code element of the code element sequence in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
8. The apparatus of claim 6, wherein the adding module is further configured to:
selecting a designated code element for two adjacent pulse signals; wherein the designated code element is any code element except zero in the code element which can be expressed by the multi-element position phase shift keying technology;
modulating a first pulse signal according to a first modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a first pulse signal added with a digital watermark; wherein, the phase jump variable in the first modulation mode is the appointed phase jump variable;
modulating a second pulse signal according to a second modulation mode corresponding to the designated code element in the multi-element position phase shift keying to obtain a second pulse signal added with a digital watermark; and the phase jump variable in the second modulation mode is the inverse number of the specified phase jump variable.
9. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the method of countering digital radio frequency memory interference of any one of claims 1 to 5.
10. A computer-readable storage medium, characterized in that the storage medium stores a computer program, which is executable by a processor to perform the method for countering digital radio frequency memory interference according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570824.8A CN111679252A (en) | 2020-06-18 | 2020-06-18 | Method and device for resisting digital radio frequency storage interference, electronic equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570824.8A CN111679252A (en) | 2020-06-18 | 2020-06-18 | Method and device for resisting digital radio frequency storage interference, electronic equipment and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111679252A true CN111679252A (en) | 2020-09-18 |
Family
ID=72456067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010570824.8A Withdrawn CN111679252A (en) | 2020-06-18 | 2020-06-18 | Method and device for resisting digital radio frequency storage interference, electronic equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111679252A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050212692A1 (en) * | 2004-03-26 | 2005-09-29 | Iny David R | 2-d range hopping spread spectrum encoder/decoder system for RF tags |
| CN102590794A (en) * | 2012-02-28 | 2012-07-18 | 北京航空航天大学 | Broadband coherent radar target simulator |
| CN103401827A (en) * | 2013-08-01 | 2013-11-20 | 东南大学 | Multi-carrier implementation method of MPPSK (M-ary Position Shift Keying) modulation |
| CN103873160A (en) * | 2012-12-12 | 2014-06-18 | 北京普源精电科技有限公司 | Method and device for changing phase jump of phase shift keying (PSK) |
| CN103957182A (en) * | 2014-05-21 | 2014-07-30 | 苏州东奇信息科技股份有限公司 | Co-channel full-duplex system based on MPPSK modulation |
| CN104836773A (en) * | 2015-03-31 | 2015-08-12 | 苏州东奇信息科技股份有限公司 | Bipolar binary shift pulse keying modulation and demodulation method |
| CN104883202A (en) * | 2014-02-27 | 2015-09-02 | 华为技术有限公司 | Method of reducing adjacent channel interference and relay equipment |
| CN105527614A (en) * | 2016-02-29 | 2016-04-27 | 南京理工大学 | LFM pulse radar anti-DRFM-interference method based on moving target detection |
| CN105629207A (en) * | 2015-12-22 | 2016-06-01 | 南京理工大学 | Radar signal processing system based on DRFM (Digital Radio-Frequency Memory) technology and dense target jamming generation method |
| CN109633653A (en) * | 2019-01-28 | 2019-04-16 | 上海通轩电子科技有限公司 | A kind of radar anti-interference method, device, unjammable radar and storage medium |
| CN109787930A (en) * | 2019-03-29 | 2019-05-21 | 苏州东奇信息科技股份有限公司 | A kind of anti-impulse disturbances method based on MPPSK modulation system |
| CN110109076A (en) * | 2019-04-24 | 2019-08-09 | 西安电子科技大学 | The object detection method inhibited based on phase cancellation agile coherent radar clutter |
| CN110120826A (en) * | 2019-04-22 | 2019-08-13 | 长沙翼盾电子科技有限公司 | A kind of interference parameter estimation offsets the anti-interference method with STAP cascade processing |
| CN110412519A (en) * | 2019-09-04 | 2019-11-05 | 中国人民解放军空军工程大学 | A kind of radar target signal and interference signal separation method and device |
| CN110426686A (en) * | 2019-07-18 | 2019-11-08 | 长沙理工大学 | The anti-interrupted sampling repeater jammer method, apparatus of radar and radar equipment |
-
2020
- 2020-06-18 CN CN202010570824.8A patent/CN111679252A/en not_active Withdrawn
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050212692A1 (en) * | 2004-03-26 | 2005-09-29 | Iny David R | 2-d range hopping spread spectrum encoder/decoder system for RF tags |
| CN102590794A (en) * | 2012-02-28 | 2012-07-18 | 北京航空航天大学 | Broadband coherent radar target simulator |
| CN103873160A (en) * | 2012-12-12 | 2014-06-18 | 北京普源精电科技有限公司 | Method and device for changing phase jump of phase shift keying (PSK) |
| CN103401827A (en) * | 2013-08-01 | 2013-11-20 | 东南大学 | Multi-carrier implementation method of MPPSK (M-ary Position Shift Keying) modulation |
| CN104883202A (en) * | 2014-02-27 | 2015-09-02 | 华为技术有限公司 | Method of reducing adjacent channel interference and relay equipment |
| CN103957182A (en) * | 2014-05-21 | 2014-07-30 | 苏州东奇信息科技股份有限公司 | Co-channel full-duplex system based on MPPSK modulation |
| CN104836773A (en) * | 2015-03-31 | 2015-08-12 | 苏州东奇信息科技股份有限公司 | Bipolar binary shift pulse keying modulation and demodulation method |
| CN105629207A (en) * | 2015-12-22 | 2016-06-01 | 南京理工大学 | Radar signal processing system based on DRFM (Digital Radio-Frequency Memory) technology and dense target jamming generation method |
| CN105527614A (en) * | 2016-02-29 | 2016-04-27 | 南京理工大学 | LFM pulse radar anti-DRFM-interference method based on moving target detection |
| CN109633653A (en) * | 2019-01-28 | 2019-04-16 | 上海通轩电子科技有限公司 | A kind of radar anti-interference method, device, unjammable radar and storage medium |
| CN109787930A (en) * | 2019-03-29 | 2019-05-21 | 苏州东奇信息科技股份有限公司 | A kind of anti-impulse disturbances method based on MPPSK modulation system |
| CN110120826A (en) * | 2019-04-22 | 2019-08-13 | 长沙翼盾电子科技有限公司 | A kind of interference parameter estimation offsets the anti-interference method with STAP cascade processing |
| CN110109076A (en) * | 2019-04-24 | 2019-08-09 | 西安电子科技大学 | The object detection method inhibited based on phase cancellation agile coherent radar clutter |
| CN110426686A (en) * | 2019-07-18 | 2019-11-08 | 长沙理工大学 | The anti-interrupted sampling repeater jammer method, apparatus of radar and radar equipment |
| CN110412519A (en) * | 2019-09-04 | 2019-11-05 | 中国人民解放军空军工程大学 | A kind of radar target signal and interference signal separation method and device |
Non-Patent Citations (1)
| Title |
|---|
| LEI BAO ET AL.: "Radar Anti-jamming Technology based on Waveform Watermarking" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3449272B1 (en) | Vehicle radar system with a shared radar and communication system, and method for managing such a system in a vehicle | |
| CN110873877B (en) | Method and device for determining target motion track | |
| WO2017187299A2 (en) | Successive signal interference mitigation | |
| US10036800B2 (en) | Systems and methods for using coherent noise filtering | |
| Babur et al. | Simple transmit diversity technique for phased array radar | |
| Ipanov et al. | Radar signals with ZACZ based on pairs of D-code sequences and their compression algorithm | |
| EP4009074A1 (en) | Co-prime coded (cpc) doppler division multiplexing (ddm) mimo radar method and system | |
| Gao et al. | Orthogonal frequency diversity waveform with range-Doppler optimization for MIMO radar | |
| US7248207B2 (en) | System and method for sidelobe reduction using point spread function expansion | |
| CN105022037B (en) | A kind of car radar cross jamming suppressing method based on hyperchaos coding | |
| WO2007055749A2 (en) | System and method for sidelobe reduction using detect-and-subtract techniques | |
| US11073607B2 (en) | Wideband radar systems, apparatuses, and methods | |
| CN114325726B (en) | Anti-crosstalk processing method of laser radar, storage medium and laser radar | |
| JP2012154887A (en) | Clutter eliminator, radar device, clutter elimination method and clutter elimination program | |
| US20180306911A1 (en) | Method and system for resolving range ambiguity | |
| CN113009420A (en) | Method and system for processing slice forwarding interference signal and storage medium | |
| Hague et al. | The generalized sinusoidal frequency modulated waveform for continuous active sonar | |
| CN114355310A (en) | Multi-mode agile waveform generation and processing method of cognitive radar | |
| CN114578296B (en) | Intermittent sampling interference suppression method based on phase coding signal | |
| CN106814352B (en) | A kind of multi-target detection method based on Golay complementary waveform | |
| CN116400303B (en) | ISRJ-resistant waveform design method for intra-pulse combined inter-pulse time domain coding | |
| Akhtar et al. | Formation of range-doppler maps based on sparse reconstruction | |
| CN111679252A (en) | Method and device for resisting digital radio frequency storage interference, electronic equipment and storage medium | |
| JP5424572B2 (en) | Radar equipment | |
| CN112034447A (en) | Two-phase modulation method and device for improving detection performance of pulse Doppler radar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200918 |
|
| WW01 | Invention patent application withdrawn after publication |