Communication radiation source dataset construction method and apparatus

Abstract

The application provides a communication radiation source dataset construction method and device, the communication radiation source dataset construction method comprises the following steps: obtaining communication information of a communication radiation source; based on a coupling model, sequentially performing symbol modulation, signal filtering, carrier modulation and power amplification on the communication information to obtain a coupling signal; the coupling model is obtained based on filter distortion characteristics, unbalanced characteristics of a signal quadrature modulator and nonlinear error coupling of a power amplifier; and based on the coupling signal, a communication radiation source dataset is obtained to provide fingerprint characteristics for a communication radiation source individual identification task. The method improves the representation ability of the fingerprint characteristics by studying and analyzing the generation mechanism of the fingerprint characteristics of the communication radiation source individual, and by combining the mutual coupling effects of the three typical hardware damages, i.e., filter distortion characteristics, unbalanced characteristics of a signal quadrature modulator and nonlinear error of a power amplifier, to perform simulation analysis on the communication radiation signal.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a method and apparatus for constructing a communication radiation source dataset. Background Technology

[0002] Individual identification of communication radiation sources is a technique that identifies a specific individual by receiving radio signals emitted by an individual communication radiation source and extracting the individual's fingerprint characteristics from the radio signals.

[0003] In related technologies, the dataset is generally obtained by simulating communication information through quadrature modulation error or power amplifier nonlinear error, and used as input data for the task of identifying individual radiation sources. However, the analysis method of fingerprint features in this signal simulation process is singular, resulting in poor generalization of the use of fingerprint features to identify individual radiation sources in communication. Summary of the Invention

[0004] This invention provides a method and apparatus for constructing a communication radiation source dataset, which addresses the shortcomings of existing technologies that rely solely on the analysis of fingerprint features in signal data through orthogonal modulation errors or power amplifier nonlinear errors, resulting in poor generalization of individual radiation source identification, and improves the characterization capability of signal features.

[0005] This invention provides a method for constructing a communication radiation source dataset, comprising:

[0006] To obtain communication information from the communication radiation source;

[0007] The communication information is processed sequentially using a coupling model, including symbol modulation, signal filtering, carrier modulation, and power amplification, to obtain a coupled signal. The coupling model is based on the coupling of filter distortion characteristics, the unbalanced characteristics of the quadrature modulator, and the nonlinear error of the power amplifier.

[0008] A communication radiation source dataset is obtained based on the coupling signal, and the communication radiation source dataset is used to provide fingerprint features for the task of individual identification of communication radiation sources.

[0009] According to a method for constructing a communication radiation source dataset provided by the present invention, the coupling model includes a shaping filter, an IQ modulator, and a power amplifier;

[0010] The communication information is processed sequentially using a coupling model, involving symbol modulation, signal filtering, carrier modulation, and power amplification, to obtain a coupled signal including:

[0011] The communication information is symbol-modulated to obtain a first modulated signal;

[0012] The first modulated signal is filtered using a shaping filter to obtain a filtered signal.

[0013] The filtered signal is carrier-modulated using an IQ modulator to obtain a second modulated signal;

[0014] The second modulation signal is amplified by a power amplifier to obtain the coupled signal.

[0015] According to a method for constructing a communication radiation source dataset provided by the present invention, the step of filtering the first modulated signal based on a shaping filter to obtain a filtered signal includes:

[0016] The filtered signal is obtained using the following formula:

[0017]

[0018] Where y(t) is the filtered signal, x(t) is the first modulated signal, g(t) is the time-domain expression of the equivalent filter of the transmitter analog path, X(f) is the frequency response corresponding to x(t), G(f) is the frequency response corresponding to g(t), and I filter (t) is the in-phase signal of the first modulation signal after being filtered by the shaping filter, Q filter (t) is the orthogonal signal after the first modulation signal is filtered by the shaping filter.

[0019] According to a method for constructing a communication radiation source dataset provided by the present invention, the step of carrier modulation of the filtered signal based on an IQ modulator to obtain a second modulated signal includes:

[0020] The second modulation signal is obtained using the following formula:

[0021] z(t) = Re[y(t)*c(t)] = I filter (t)cos(2πf c t)-Q filter (t)(1+α)sin(2πf c t+ε)

[0022] Where z(t) is the second modulation signal, y(t) is the filtered signal, c(t) is the mathematical model corresponding to the IQ modulator, and I filter (t) is the in-phase signal of the first modulation signal after being filtered by the shaping filter, Q filter (t) is the orthogonal signal after the first modulation signal is filtered by the shaping filter, where t is time and f is the frequency. c Let α be the carrier frequency, α be the gain imbalance parameter, and ε be the phase imbalance parameter; the mathematical model corresponding to the IQ modulator is determined based on the carrier frequency, gain imbalance parameter, and phase imbalance parameter.

[0023] According to a method for constructing a communication radiation source dataset provided by the present invention, the step of processing the second modulation signal based on a power amplifier to obtain the coupling signal includes:

[0024] The coupling signal is obtained using the following formula:

[0025]

[0026] Where s(t) is the coupling signal, z(t) is the second modulation signal, and a 2i+1 is a coefficient.

[0027] The present invention also provides a communication radiation source dataset construction apparatus, comprising:

[0028] The signal acquisition module is used to acquire communication information from the communication radiation source;

[0029] The signal processing module is used to process the communication information sequentially by symbol modulation, signal filtering, carrier modulation, and power amplification based on a coupling model to obtain a coupled signal; wherein, the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator, and the nonlinear error coupling of the power amplifier;

[0030] A dataset construction module is used to obtain a communication radiation source dataset based on the coupling signal, and the communication radiation source dataset is used to provide fingerprint features for the individual identification task of communication radiation sources.

[0031] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the communication radiation source dataset construction method as described above.

[0032] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the communication radiation source dataset construction method as described above.

[0033] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the communication radiation source dataset construction method as described above.

[0034] The present invention provides a method and apparatus for constructing a communication radiation source dataset. Through a coupling model, communication information is sequentially processed by symbol modulation, signal filtering, carrier modulation, and power amplification to obtain a coupled signal. This coupled signal is then used as the dataset for the communication radiation source. Fingerprint features are extracted from the dataset for constructing the dataset of the communication radiation source. By studying and analyzing the generation mechanism of individual fingerprint features of the communication radiation source, and combining the mutual coupling effects of three typical hardware defects—filter distortion characteristics, unbalanced characteristics of the signal quadrature modulator, and nonlinear error of the power amplifier—the invention performs simulation analysis of the communication information, thereby improving the characterization capability of fingerprint features. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is one of the flowcharts illustrating the method for constructing a communication radiation source dataset provided by this invention;

[0037] Figure 2 This is the second flowchart illustrating the method for constructing a communication radiation source dataset provided by this invention;

[0038] Figure 3 This is a schematic diagram of the communication radiation source dataset construction device provided by the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0041] The following is combined Figures 1-3 The present invention describes a method and apparatus for constructing a communication radiation source dataset.

[0042] Figure 1 This is one of the flowcharts illustrating the communication radiation source dataset construction method provided by the present invention, such as... Figure 1 As shown, the method for constructing this communication radiation source dataset includes the following steps:

[0043] Step 110: Obtain the communication information of the communication radiation source.

[0044] In this step, the communication information is carried by the signals emitted by the communication radiation source, and the communication information of different individual communication radiation sources is determined by the communication protocols specified by different communication systems.

[0045] In this embodiment, the receiver receives communication information sent by different individual communication radiation sources, performs simulation analysis on the communication information, and extracts corresponding fingerprint features to identify each individual communication radiation source.

[0046] Step 120: Based on the coupling model, the communication information is processed sequentially by symbol modulation, signal filtering, carrier modulation and power amplification to obtain the coupled signal; wherein, the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator and the nonlinear error coupling of the power amplifier.

[0047] In this step, the coupling model is a mathematical model that combines the distortion characteristics of the filter, the unbalanced characteristics of the signal modulator, and the nonlinear error of the power amplifier to form a comprehensive model.

[0048] In this step, during the symbol modulation of the communication information, digital modulation can be used to modulate the communication information to obtain the corresponding modulated signal.

[0049] In this embodiment, digital modulation includes QPSK modulation, ASK modulation, PSK modulation, or FSK modulation, etc.

[0050] For example, QPSK modulation can be applied to the input communication information to obtain symbol-modulated signal data.

[0051] In this embodiment, the filter can be a shaped filter, such as a raised cosine filter.

[0052] In this embodiment, the quadrature modulator is used to implement the carrier modulation function. For example, the quadrature modulator can be an IQ modulator, which is also known as quadrature modulation.

[0053] In this embodiment, the coupling model may include multiple processing units, each of which is used to implement functions such as symbol modulation, signal filtering, carrier modulation, and power amplification.

[0054] In this embodiment, the collected communication information is modulated and simulated through the mutual coupling of the above processing units to obtain a corresponding coupling signal, which is used to extract relevant fingerprint features from the coupling signal to realize the identification of each individual communication radiation source.

[0055] In this embodiment, the coupled model can perform coupled analysis on three typical hardware impairments: filter distortion, modulator imbalance characteristics, and power amplifier nonlinearity error.

[0056] For example, the filtered signal output by a shaped filter includes fingerprint features and symbol randomness features, which can affect the frequency response of the signal. The fingerprint features of the filter distortion will cause jitter in the frequency domain response of the signal. When the filtered signal is input to a power amplifier for power amplification, for the third-order term of the power amplifier, the signal after hardware damage coupling will generate third harmonics and aliasing components. Frequency aliasing will cause signal distortion, while the symbol randomness features will directly affect the aliasing of the signal.

[0057] In this embodiment, by adjusting the filter distortion parameters in the transmitter hardware impairment, the frequency at which aliasing can be controlled can be changed slightly. Setting the third-order coefficient of the power amplifier and the gain imbalance parameter can change the signal amplitude at different aliasing frequencies. Setting the corresponding phase imbalance parameter can change the phase of the aliasing component.

[0058] It should be noted that, compared to the harmonic-free portion, the third harmonic component, along with harmonic distortion and aliasing, constitutes the factors contributing to signal distortion. Although the number of factors influencing distortion increases, the amplitude variation decreases. However, for the fifth-order term of the power amplifier, the signal coupled by hardware defects will generate third and fifth harmonics and aliasing components. Unlike the third-order term, the fifth-order term generates richer mixing components and harmonics. The fifth-order coefficient of the power amplifier can affect the signal amplitude variation, but the distortion amplitude of this part is smaller than that of the third-order term, increasing the difficulty of fingerprint feature extraction.

[0059] In this embodiment, the signals coupled by the three typical hardware impairments mentioned above will contain randomness and fingerprint characteristics of the symbols. The frequency response of the signal can be affected by adjusting the filter distortion parameters. The amplitude change of the signal can be affected by adjusting the gain imbalance parameters of the quadrature modulator and the coefficients of each order of the power amplifier. As the order of the power amplifier increases, the influence of each coefficient decreases.

[0060] Step 130: Obtain a communication radiation source dataset based on the coupling signal. The communication radiation source dataset is used to provide fingerprint features for the individual identification task of communication radiation sources.

[0061] In this step, after obtaining the coupling signal, the coupling signal is used as the communication radiation source dataset. Since the coupling signal includes the randomness characteristics and fingerprint characteristics of communication information, the fingerprint characteristics can be directly extracted from the coupling signal and input into the communication radiation source identification model to determine the individual type of communication radiation source corresponding to the fingerprint characteristics.

[0062] For example, a Short-Time Fourier Transform (STFT) can be performed on the coupled signal to obtain the STFT characteristic parameters of the coupled signal, which can be used as the signal characteristics of the coupled signal.

[0063] In this embodiment, according to the communication protocol requirements in actual communication, the communication information includes a preamble symbol and a random communication symbol. In order to increase the robustness of the algorithm in later research, fingerprint features can be obtained by setting random communication information. When extracting fingerprint features from the coupled signal using the feature extraction algorithm, statistical features are introduced to reduce the impact of random features on the extraction of fingerprint features, thereby extracting fingerprint features more effectively.

[0064] The communication radiation source dataset construction method of this invention processes communication information sequentially through symbol modulation, signal filtering, carrier modulation, and power amplification using a coupling model to obtain a coupled signal. This coupled signal is then used as the dataset of the communication radiation source. Fingerprint features are extracted from the dataset to construct the dataset of the communication radiation source. By studying and analyzing the generation mechanism of individual fingerprint features of the communication radiation source, and combining the mutual coupling effect of three typical hardware defects—filter distortion characteristics, unbalanced characteristics of the signal quadrature modulator, and nonlinear error of the power amplifier—the method performs simulation analysis on the communication information, thereby improving the characterization capability of fingerprint features.

[0065] In some embodiments, the coupling model includes a shaping filter, an IQ modulator, and a power amplifier; processing the communication information sequentially by symbol modulation, signal filtering, carrier modulation, and power amplification based on the coupling model to obtain a coupled signal includes: performing symbol modulation on the communication information to obtain a first modulated signal; performing signal filtering on the first modulated signal based on the shaping filter to obtain a filtered signal; performing carrier modulation on the filtered signal based on the IQ modulator to obtain a second modulated signal; and performing power amplification on the second modulated signal based on the power amplifier to obtain the coupled signal.

[0066] In this embodiment, the communication information is digitally modulated to obtain a first modulated signal; for example, the communication information is QPSK modulated to obtain a first modulated signal.

[0067] In this embodiment, due to differences in manufacturing processes and device characteristics, different filters exhibit different frequency responses and group delays. This phenomenon is called filter distortion, which is a typical hardware defect in transmitters.

[0068] In this embodiment, after acquiring the first modulation signal, the first modulation signal is filtered using a raised cosine filter to obtain a filtered signal.

[0069] In this embodiment, since the errors of the IQ modulator are mainly manifested as IQ gain imbalance and IQ phase imbalance, which are also typical hardware defects of the transmitter, the filtered signal is modulated by the IQ quadrature modulator to obtain the second modulated signal.

[0070] In this embodiment, due to manufacturing process issues, the power amplifier cannot always amplify the signal linearly, which will result in nonlinear error of the power amplifier. Due to differences in components, the nonlinear characteristics of different power amplifiers are not consistent, so the nonlinear error of the power amplifier is also a typical hardware damage of the transmitter.

[0071] In this embodiment, after obtaining the second modulation signal, the second modulation signal is processed by a power amplifier to obtain a coupling signal. At this time, the coupling signal includes the required fingerprint features.

[0072] Figure 2 This is the second flowchart illustrating the communication radiation source dataset construction method provided by this invention. Figure 2 In the illustrated embodiment, communication information generated by the information source is acquired, and symbol modulation is performed on the communication information to obtain a first modulation signal. Then, the first modulation signal is filtered by a shaping filter to obtain a filtered signal. The filtered signal is then carrier-modulated by an IQ modulator to obtain a second modulation signal. The second modulation signal is then amplified by a power amplifier to obtain a coupling signal. Taking into account the influence of actual channel factors, fingerprint features are finally extracted from the coupling signal for the construction of a dataset of communication radiation sources.

[0073] The communication radiation source dataset construction method of this invention involves symbol modulation of communication information to obtain a first modulation signal, signal filtering of the first modulation signal using a shaping filter to obtain a filtered signal, carrier modulation of the filtered signal using an IQ modulator to obtain a second modulation signal, and finally processing of the second modulation signal using a power amplifier to obtain a coupling signal. By analyzing the comprehensive effect of mutual coupling between internal devices of the transmitter, the communication information is modulated, filtered, and amplified to obtain the coupling signal, thereby obtaining fingerprint features with stronger characterization capabilities and improving the generalization of constructing communication radiation source datasets using fingerprint features.

[0074] In some embodiments, filtering the first modulated signal based on a shaping filter to obtain a filtered signal includes: obtaining the filtered signal using the following formula:

[0075]

[0076] Where y(t) is the filtered signal, x(t) is the first modulation signal, g(t) is the time-domain expression of the equivalent filter of the transmitter analog path, X(f) is the frequency response corresponding to x(t), G(f) is the frequency response corresponding to g(t), and I filter (t) is the in-phase signal after the first modulation signal is filtered by the shaping filter, Q filter (t) is the orthogonal signal after the first modulation signal is filtered by the shaping filter.

[0077] In this embodiment, a raised cosine filter is used in the transmitter to filter the first modulation signal to obtain a filtered signal; the signal filtering process is explained below in conjunction with filter distortion, a typical hardware defect:

[0078] (1) The equivalent frequency response of the filter in the transmitter can be expressed as:

[0079] G(f) = H(f)Ψ(f);

[0080] Where H(f) is the frequency response of the transmitter shaping filter, and Ψ(f) is the path frequency response error caused by errors in the transmitter link or analog filter. Ψ(f) is expressed as a Fourier series as follows:

[0081]

[0082]

[0083]

[0084] Among them, A Ψ (f) represents the amplitude distortion of the equivalent filter's frequency response, Φ Ψ (f) represents the phase distortion of the equivalent filter's frequency response, ρ k This represents the maximum amplitude distortion. B is the maximum value of phase distortion. A and B Φ Let be the signal bandwidth, and k be the number of cycles in which amplitude distortion and phase distortion change within the signal bandwidth.

[0085] (2) Considering the requirements for describing tilt and periodic ripples, A is respectively expressed by the following formulas. Ψ (f) and Φ Ψ (f) Take the second-order approximation:

[0086]

[0087]

[0088] Among them, by adjusting the parameters ρ1 and The magnitude of the value is used to change the tilt and ripple of the filter's frequency response. The filter output signal is then:

[0089]

[0090] It should be noted that I filter (t) and Q filter (t) includes fingerprint features of filter distortion and symbol randomness features.

[0091] The communication radiation source dataset construction method of this invention uses a shaping filter to filter the first modulation signal and improves the characterization ability of the fingerprint features of filter distortion by analyzing the sensitivity of filter distortion, a typical hardware defect, to the signal filtering process.

[0092] In some embodiments, carrier modulation of the filtered signal based on an IQ modulator to obtain a second modulated signal includes: obtaining the second modulated signal using the following formula:

[0093] z(t) = Re[y(t)*c(t)] = I filter (t)cos(2πf c t)-Q filter (t)(1+α)sin(2πf c t+ε)

[0094] Where z(t) is the second modulation signal, y(t) is the filtered signal, c(t) is the mathematical model corresponding to the IQ modulator, and I filter (t) is the in-phase signal after the first modulation signal is filtered by the shaping filter, Q filter (t) is the quadrature signal after the first modulation signal is filtered by the shaping filter, where t is time, and f is the frequency. c Let α be the carrier frequency, α be the gain imbalance parameter, and ε be the phase imbalance parameter; the mathematical model corresponding to the IQ modulator is determined based on the carrier frequency, gain imbalance parameter, and phase imbalance parameter.

[0095] In this embodiment, the filtered signal is modulated using an IQ modulator; the quadrature modulation process is explained below in conjunction with the typical hardware impairment of the signal modulator's unbalanced characteristics:

[0096] (1) Design a mathematical model for the quadrature modulator. This mathematical model is related to the carrier frequency, gain imbalance parameter, and phase imbalance parameter.

[0097] For example, the mathematical model can be represented by the following formula:

[0098] c(t)=cos(2πf c t)+j(1+α)sin(2πf ct+ε);

[0099] Here, c(t) is the mathematical model.

[0100] (2) Using the filtered signal y(t) as the input signal, the second modulation signal z(t) is obtained by orthogonal in-phase modulation through the above mathematical model c(t).

[0101] The communication radiation source dataset construction method of this invention obtains a second modulated signal by orthogonally modulating the filtered signal using an IQ modulator. By analyzing the sensitivity of the modulator's unbalanced characteristics—a typical hardware defect—to the orthogonal modulation process of the signal, the method improves the characterization capability of the fingerprint features of the modulator's unbalanced characteristics.

[0102] In some embodiments, processing the second modulation signal based on the power amplifier to obtain the coupled signal includes:

[0103] The coupling signal is obtained using the following formula.

[0104]

[0105] Where s(t) is the coupling signal, z(t) is the second modulation signal, and a 2i+1 is the coefficient of the order term.

[0106] In this embodiment, the second modulation signal is processed by a power amplifier; the signal amplification process is explained below in conjunction with the typical hardware impairment of the power amplifier's nonlinearity error:

[0107] (1) The Taylor series mathematical model of the power amplifier is established as follows:

[0108]

[0109] Simplifying the Taylor series mathematical model and considering the nonlinear region of the power amplifier, we take the fifth-order approximation:

[0110] s(t)=a1z(t)+a3(z(t)) 3 +a5(z(t)) 5 ;

[0111] Where a1, a3, and a5 are the coefficients of the first-order term, the third-order term, and the fifth-order term, respectively, and different order term coefficients correspond to different power amplifiers.

[0112] (2) Coupling analysis of typical hardware defects:

[0113] The signal expression for the first-order term of the power amplifier is:

[0114] s1(t)=a1[Ifilter (t)cos(2πf c t)-(1+α)Q filter (t)sin(2πf c t+ε)];

[0115] Among them, I filter (t) and Q filter (t) contains the fingerprint features of filter distortion and symbol randomness features, which can affect the frequency response of the signal. The fingerprint features of filter distortion will cause jitter in the frequency domain response of the signal; a1 is the fingerprint feature of power meter amplification, which will affect the overall amplitude of this part of the signal; α and ε are used to represent the fingerprint features of IQ modulator, which will cause the relative amplitude and phase of the finally received IQ signals to change.

[0116] In this embodiment, for the third-order term of the power amplifier, the signal coupled by hardware impairment will generate third harmonic and aliasing components, wherein the expression for the harmonic-free part is:

[0117]

[0118]

[0119]

[0120] In this embodiment, due to and This can lead to frequency aliasing, causing signal distortion. The randomness of the symbols directly affects the aliasing situation. The filter distortion parameters ρ1 and ρ1 in transmitter hardware defects... The frequency of aliasing changes slightly, the third-order coefficient a3 of the power amplifier and the gain imbalance parameter α cause the signal amplitude to change at different aliasing frequencies, and the phase imbalance parameter ε causes the phase of the aliasing components to change.

[0121] In this embodiment, the third harmonic expression of the third-order term of the power amplifier is:

[0122]

[0123] In this embodiment, the signals coupled by the three typical hardware impairments described above will contain randomness characteristics and fingerprint characteristics of the symbols, and the filter distortion parameter ρ1 and The gain imbalance parameter α of IQ imbalance and the coefficients a1, a3, and a5 of the power amplifier affect the frequency response of the signal. Moreover, the influence of each coefficient decreases as the power amplifier order increases.

[0124] The communication radiation source dataset construction method of this invention processes the second modulation signal through a power amplifier, and improves the characterization capability of the power amplifier's fingerprint features by analyzing the sensitivity of the power amplifier's nonlinear error, a typical hardware defect, to the power amplifier processing process.

[0125] The following describes the communication radiation source dataset construction apparatus provided by the present invention. The communication radiation source dataset construction apparatus described below and the communication radiation source dataset construction method described above can be referred to in correspondence.

[0126] Figure 3 This is a schematic diagram of the communication radiation source dataset construction device provided by the present invention, as shown below. Figure 3 As shown, the communication radiation source dataset construction device includes a signal acquisition module 310, a signal processing module 320, and an identification module 330.

[0127] The signal acquisition module 310 is used to acquire communication information from the communication radiation source;

[0128] The signal processing module 320 is used to process the communication information sequentially by performing signal modulation, signal filtering, carrier modulation, and power amplification based on a coupling model to obtain a coupled signal; wherein, the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator, and the nonlinear error coupling of the power amplifier;

[0129] The dataset construction module 330 is used to obtain a communication radiation source dataset based on the coupling signal. The communication radiation source dataset is used to provide fingerprint features for the individual identification task of communication radiation sources.

[0130] The communication radiation source dataset construction device of this invention processes communication information sequentially through symbol modulation, signal filtering, carrier modulation, and power amplification using a coupling model to obtain a coupled signal. This coupled signal is then used as the dataset of the communication radiation source. Fingerprint features are extracted from the dataset for constructing the dataset of the communication radiation source. By studying and analyzing the generation mechanism of individual fingerprint features of the communication radiation source, and combining the mutual coupling effect of three typical hardware defects—filter distortion characteristics, unbalanced characteristics of the signal quadrature modulator, and nonlinear error of the power amplifier—the device performs simulation analysis of the communication information, thereby improving the characterization capability of fingerprint features.

[0131] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention, such as... Figure 4As shown, the electronic device may include a processor 410, a communications interface 420, a memory 430, and a communication bus 440. The processor 410, communications interface 420, and memory 430 communicate with each other via the communication bus 440. The processor 410 can call logical instructions in the memory 430 to execute a method for constructing a communication radiation source dataset. This method includes: acquiring communication information of the communication radiation source; processing the communication information sequentially using symbol modulation, signal filtering, carrier modulation, and power amplification based on a coupling model to obtain a coupled signal; wherein the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator, and the nonlinear error coupling of the power amplifier; and obtaining a communication radiation source dataset based on the coupled signal. This communication radiation source dataset is used to provide fingerprint features for individual identification tasks of communication radiation sources.

[0132] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0133] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the communication radiation source dataset construction method provided by the above methods. The method includes: acquiring communication information of the communication radiation source; performing symbol modulation, signal filtering, carrier modulation, and power amplification on the communication information in sequence based on a coupling model to obtain a coupled signal; wherein the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator, and the nonlinear error coupling of the power amplifier; and obtaining a communication radiation source dataset based on the coupled signal. The communication radiation source dataset is used to provide fingerprint features for the individual identification task of communication radiation sources.

[0134] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a method for constructing a communication radiation source dataset provided by the above methods. The method includes: acquiring communication information of a communication radiation source; performing symbol modulation, signal filtering, carrier modulation, and power amplification on the communication information sequentially based on a coupling model to obtain a coupled signal; wherein the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator, and the nonlinear error coupling of the power amplifier; and obtaining a communication radiation source dataset based on the coupled signal. The communication radiation source dataset is used to provide fingerprint features for the individual identification task of communication radiation sources.

[0135] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0136] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for constructing a dataset of communication radiation sources, characterized in that, include: To obtain communication information from the communication radiation source; The communication information is processed sequentially using a coupling model, including symbol modulation, signal filtering, carrier modulation, and power amplification, to obtain a coupled signal. The coupling model is based on the coupling of filter distortion characteristics, the unbalanced characteristics of the quadrature modulator, and the nonlinear error of the power amplifier. A communication radiation source dataset is obtained based on the coupling signal. This dataset is used to provide fingerprint features for individual identification of communication radiation sources. The coupling model includes a shaping filter, an IQ modulator, and a power amplifier. The communication information is processed sequentially using a coupling model, involving symbol modulation, signal filtering, carrier modulation, and power amplification, to obtain a coupled signal including: The communication information is modulated with signal symbols to obtain a first modulated signal; The first modulated signal is filtered using a shaping filter to obtain a filtered signal. The filtered signal is carrier-modulated using an IQ modulator to obtain a second modulated signal; The second modulation signal is amplified by a power amplifier to obtain the coupled signal; The process of amplifying the second modulation signal using a power amplifier to obtain the coupled signal includes: The coupling signal is obtained using the following formula: ； in, The coupling signal, The second modulation signal, is the coefficient of the order term.

2. The method for constructing a communication radiation source dataset according to claim 1, characterized in that, The step of filtering the first modulated signal using a shaping filter to obtain a filtered signal includes: The filtered signal is obtained using the following formula: ； in, The filtered signal, The first modulation signal, The time-domain representation of the equivalent filter for the transmitter analog path. for The corresponding frequency response, for The corresponding frequency response, The signal is the in-phase signal obtained after the first modulation signal has been filtered by the shaping filter. The first modulated signal is the orthogonal signal after being filtered by the shaping filter.

3. The method for constructing a communication radiation source dataset according to claim 1, characterized in that, The carrier modulation of the filtered signal based on the IQ modulator to obtain the second modulated signal includes: The second modulation signal is obtained using the following formula: in, The second modulation signal, The filtered signal, The mathematical model corresponding to the IQ modulator is... The signal is the in-phase signal obtained after the first modulation signal has been filtered by the shaping filter. The first modulated signal is the orthogonal signal obtained after being filtered by the shaping filter. t For a moment, For carrier frequency, For gain imbalance parameters, The phase imbalance parameter is used; the mathematical model corresponding to the IQ modulator is determined based on the carrier frequency, gain imbalance parameter, and phase imbalance parameter.

4. A communication radiation source dataset construction apparatus, employing the communication radiation source dataset construction method as described in claim 1, characterized in that, include: The signal acquisition module is used to acquire communication information from the communication radiation source; The signal processing module is used to process the communication information sequentially by performing signal modulation, signal filtering, carrier modulation, and power amplification based on a coupling model to obtain a coupled signal; wherein, the coupling model is obtained based on the filter distortion characteristics, the unbalanced characteristics of the signal quadrature modulator, and the nonlinear error coupling of the power amplifier; A dataset construction module is used to obtain a communication radiation source dataset based on the coupling signal, and the communication radiation source dataset is used to provide fingerprint features for the individual identification task of communication radiation sources.

5. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the communication radiation source dataset construction method as described in any one of claims 1 to 3.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the communication radiation source dataset construction method as described in any one of claims 1 to 3.

7. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the communication radiation source dataset construction method as described in any one of claims 1 to 3.

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