KR102411498B1 - Digital signal noise communication method and system - Google Patents

Abstract

The present invention provides a noise communication method of a digital signal in a transceiver, comprising: obtaining an I/Q signal by modulating the digital signal through a transmitter; modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter; transferring the modulated I/Q signal to a receiver; and restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal, and provides a system for noise communication of the digital signal.

Description

DIGITAL SIGNAL NOISE COMMUNICATION METHOD AND SYSTEM

The present invention relates to a method and system for noise communication of a digital signal. Specifically, the present invention relates to a noise communication method and system for representing a shape similar to ring-shaped white noise by applying a noise communication technique to I/Q data in order to enhance information security in the physical layer of a digital signal. will be.

Electronic warfare is a war using electromagnetic waves, a concept proposed by the development of science and technology and electronic equipment. In electronic warfare, various attacks such as electronic information theft, communication system paralysis, and destruction of core equipment are carried out. In the case of information stealing during such an attack, it is necessary to study various defenses for defense because it causes a huge loss of military power.

On the other hand, with the development of communication technology, various applicability of communication techniques such as WiFi, LTE, 5G, etc., user accessibility, and technology scalability have developed, and security measures for transmitted and received data have become more necessary. In the existing security system method, there was a method implemented in software such as steganography or blockchain. However, due to the development of technology, as attack methods that can acquire personal information with only the RF signal of the physical layer (PHY) have emerged, security methods in the physical layer are required. However, the previously discussed security methods in the physical layer had a limitation in that an appropriate noise level was not presented, and in the case of a specific modulated signal, there was a disadvantage that the modulation method could be distinguished even using the proposed method. There was a problem in that the calculation process increased due to the addition of . In particular, existing studies have limitations in that the communication signal cannot be completely hidden, so the enemy can know whether the enemy is communicating or not, and the signal can be seized through the estimation algorithm.

An object of the present embodiment is to provide a noise communication method and system for modulating an I/Q signal with ring-type noise in order to achieve RF signal security in a physical layer.

In addition, the problem to be solved by this embodiment is a noise communication method and system for proposing necessary modifications of the existing transceiver so that the RF signal modulated according to the noise communication technique of the present disclosure can be applied to various transceivers used in general purpose is to provide

The technical problems to be achieved by the present embodiment are not limited to the technical problems described above, and other technical problems may be inferred from the following embodiments.

A noise communication method of a digital signal according to an embodiment includes: obtaining an I/Q signal by modulating the digital signal through a transmitter; modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter; transferring the modulated I/Q signal to a receiver; and restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal.

A noise communication system according to an embodiment includes a transmitter and a receiver, the system comprising: modulating the digital signal through the transmitter to obtain an I/Q signal, and converting the I/Q signal to a phase parameter through the transmitter and modulating into a noise form based on the magnitude parameter, transmitting the modulated I/Q signal to the receiver through the transmitter, and demodulating the modulated I/Q signal to a digital signal by restoring the modulated I/Q signal through the receiver have.

A computer-readable non-transitory recording medium recording a program for executing a method for communicating noise of a digital signal in a computer according to an embodiment, the method comprising: modulating the digital signal through a transmitter to obtain an I/Q signal to do; modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter; transferring the modulated I/Q signal to a receiver; and restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal.

According to the present disclosure, there is an advantage that minimal performance degradation and superior information security are possible by modulating I/Q data similarly to ring-shaped white noise.

In addition, according to the present disclosure, a receiver that does not share an envelope with a transmitter cannot demodulate a modulated signal or it is difficult to know the contents of the original data even when demodulated, so it has an advantage of having higher security performance than a conventional RF signal exchanged There is this.

Effects of the invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a conceptual diagram illustrating a noise communication method of a digital signal according to an exemplary embodiment.
2 is a diagram illustrating magnitudes and phases of noise-modulated I/Q data in a complex plane according to an exemplary embodiment.
3 is a diagram illustrating a waveform of a QPSK modulated signal.
4 is a diagram illustrating I/Q data to which a magnitude parameter is applied in a complex plane according to an embodiment.
5 is a diagram illustrating a waveform of an RF signal to which a magnitude parameter is applied in the waveform of FIG. 3 .
6 is a diagram schematically illustrating a method of generating a phase parameter value according to an embodiment.
7 is a diagram illustrating I/Q data to which a phase parameter is applied in a complex plane according to an exemplary embodiment.
8 is a diagram illustrating a waveform of an RF signal to which a phase parameter is applied in the waveform of FIG. 3 .
9 is a diagram schematically illustrating a method of modulating data in a symbol form in the related art.
10 is a diagram schematically illustrating a method of independently modulating a header and a data bit according to an embodiment of the present disclosure.
11 is a graph showing the bit error rate (BER) according to the minimum value I _m of the magnitude parameter.
12 is a graph illustrating a modulation identification probability (PMI) according to a minimum value I _m of a magnitude parameter.
13 is a flowchart illustrating a noise communication method of a digital signal according to an exemplary embodiment.
14 is a block diagram illustrating a digital signal noise communication system according to an embodiment.

Terms used in the embodiments are selected as currently widely used general terms as possible while considering functions in the present invention, but may vary according to intentions or precedents of those of ordinary skill in the art, emergence of new technologies, and the like. In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the corresponding description. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

In the entire specification, when a part "includes" a certain element, this means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, the expression "at least one of a, b, and c" described throughout the specification means 'a alone', 'b alone', 'c alone', 'a and b', 'a and c', 'b and c', or 'all of a, b, and c'.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the embodiments of the present invention. However, the present invention may be implemented in several different forms and is not limited to the embodiments described herein. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

It is assumed that the present disclosure is applied to a transceiver using a phase-shift keying (PSK) modulation scheme. And, the present disclosure focuses on a method of applying the ring-type noise communication technique to a general transceiver, components of the noise communication technique, and necessary modifications of the transceiver for applying the noise communication technique.

According to an embodiment, in order to increase the low hearing and low detection performance for security, a signal may be made similar to white noise. White noise is a non-characteristic signal type, and there is no variable for an attacker to intercept. In addition, since the data is transformed as the signal is changed into the form of noise, even if the signal is stolen, it cannot be decrypted, so security performance can be improved.

In this way, if the transmission signal is modulated to resemble white noise, the I/Q data shows a form in which the data is distributed from the I/Q constellation to the origin. I/Q constellation is a value expressed on a complex plane of a multi-level digital signal whose phase magnitude is divided into predetermined steps according to the M value (ie, dimension) of MPSK modulation, and FIG. 2 to be described later shows constellation based on QPSK. On the other hand, since I/Q constellation responds sensitively to small operations, the smaller the I/Q constellation value, the more difficult the data restoration operation. In consideration of this point, an embodiment of the present disclosure describes a modulation technique for controlling data positioned around an origin to have a ring-like shape. The noise communication method according to an embodiment of the present disclosure modulates a transmission/reception signal similarly to a form of white noise, so that it is difficult to steal the signal, and even if the signal is stolen, it is recognized as a completely different modulation technique and thus signal analysis is impossible. In addition, the noise communication method of the present disclosure can limit data around the origin of I/Q constellation, and thus has an advantage of easy operation even when data is restored.

1 is a conceptual diagram illustrating a noise communication method of a digital signal according to an exemplary embodiment.

Since most of the communicators use a digital communication method, I/Q data can be used inevitably to generate an RF signal. Accordingly, in the noise communication method of the present disclosure, as shown in FIG. 1 for versatility, an In-phase/Quadrature-phase (I/Q) signal (or I/Q data included in the I/Q signal) is viewed immediately before RF signal generation. The noise communication technique of the disclosure may be applied. The I/Q signal is a two-dimensional signal that can express a value at a specific time as a single complex number, and is also called a complex signal, and includes a real part (in-phase) and an imaginary part (quadrature- phase) can be expressed as

According to an embodiment, an operation for generating a noise shape is added after the modulation operation of the existing communication system to create a signal having a noise shape characteristic. For example, after MPSK modulation 110 on a binary digital signal, ring shaped noise modulation 120 according to a noise communication method may be applied to the I/Q signal.

According to an embodiment, the parameters for making the signal in the form of noise may include a phase parameter and a magnitude parameter. The phase parameter contains a phase-changing factor (∮), which rotates the I/Q constellation, making it difficult for attackers to easily interpret the data and makes it look like a noisy signal. The magnitude parameter includes the magnitude change factor (M), and under the influence of ∮, the I/Q constellation points that rotate with a certain distance from the origin are made close to the origin, transforming the signal to resemble white noise, and changing the power of the data signal. Lowering it can make it difficult to eavesdrop. Parameters used for noise modulation of such a signal may be included in an envelope and shared between the transmitter and the receiver. In addition, the envelope may further include modulation information (eg, a dimension of MPSK) of the digital signal. Transmitter and receiver use mutually agreed envelopes, thereby enabling data transformation and restoration.

According to an embodiment, the I/Q signal modulated with ring-type noise is transmitted to the receiver through the channel 130, and the receiver reverses the received signal of ring-type noise through an envelope shared with the transmitter-ring-type noise. De-ring shaping (140) is possible. In addition, the receiver may finally restore the RF signal by performing MPSK demodulation (de-modulation, 150) on the I/Q signal restored to the original data to correspond to the original MPSK modulation. According to an embodiment, the I/Q signal modulated with ring-shaped noise is filtered by the transmitter and converted into an RF signal using an RF parameter (eg, a carrier frequency, a sampling rate, etc.) It can be converted and transmitted to the receiver. In addition, the receiver receives the RF signal, converts it into an I/Q signal, and then extracts the original data through the inverse-ring-type noise demodulation 140 and MPSK demodulation 150 .

According to an embodiment, parameters of the ring-shaped noise modulation 120 and the inverse-ring-shaped noise demodulation 140 may be adjusted by a ring pattern generator 160 . The ring pattern generator 160 may generate a ring pattern based on intensity level variables I _p and I _m . I _p is one of the phase parameters and represents the degree of phase division, and I _m is one of the magnitude parameters and represents the minimum value of magnitude (ie, signal strength). A detailed description related thereto will be provided later.

2 is a diagram illustrating magnitudes and phases of noise-modulated I/Q data in a complex plane according to an exemplary embodiment. The I/Q constellation of FIG. 2 is a noise-modulated state by applying both a magnitude parameter and a phase parameter. In FIG. 2 , the angle of the point measured in the counterclockwise direction on the horizontal axis represents the phase shift of the carrier wave from the reference phase, and the distance from the origin to the point represents a measure of the amplitude or power of the signal. 2 is a diagram illustrating constellation based on QPSK, and FIG. 3 is a diagram illustrating a waveform of a QPSK-modulated signal.

According to an embodiment, in the complex plane of FIG. 2 , a plurality of first points 210 represent QPSK constellation, and a second point 220 represents modified constellation. Existing I/Q data has the same shape as the first point 210 , but the I/Q data that is ring-shaped noise-modulated according to the noise communication method of the present disclosure is changed in phase and size to form second points 220 . may have the same form as

In this regard, the conventional transmission signal is as follows.

Here, x denotes an original signal magnitude, and θ denotes an original signal phase.

When the ring-type noise communication method of the present disclosure is applied to an existing transmission signal, the phase and magnitude are changed through Equation 2 below, so that the first point 210 of FIG. 2 is changed like the second points 220, The transmitted signal becomes similar to the noise shape.

In the above equation, M and ∮ are important components of the ring-type noise communication method of the present disclosure. M is a magnitude modifying factor that affects the signal strength, and ∮ is a phase modifying factor that affects the phase of the signal. In the present disclosure, M may be referred to as a magnitude parameter and ∮ may be referred to as a phase parameter in an inclusive sense.

4 is a diagram illustrating I/Q data to which a magnitude parameter is applied in a complex plane according to an embodiment. And FIG. 5 is a view showing a waveform of an RF signal to which a magnitude parameter is applied in the waveform of FIG. 3 .

According to an embodiment, M may assume 1 as a maximum value in order to prevent excessive power leakage of the transmitter. In addition, the minimum value of M can be adjusted by selecting a value between (1, 0) in consideration of the transmission/reception channel environment and the degree of conversion to a noise form. Due to this, M may have random constant values equal to the number of I/Q data among 1 and the minimum value (I _m ), and M may be multiplied by the signal strength, as shown in Equation (2). Due to the influence of M, I/Q constellation is distributed between the maximum value of I/Q data and the minimum value of M (I _m ) as shown in FIG. 4 . Also, due to the influence of M, the QPSK waveform shown in FIG. 3 may change as shown in FIG. 5 .

6 is a diagram schematically illustrating a method of generating a phase parameter value according to an embodiment. According to an embodiment, FIG. 6 illustrates a method of generating a phase changing element (∮) that rotates I/Q data. In addition, the method of generating the phase parameter value of FIG. 6 may be performed in a transmitter modulating an I/Q signal.

The phase modifying element (∮) affects the phase of the signal, causing the I/Q constellation to change like a phase divided signal. Theoretically, the I/Q constellation can be changed in the form of continuously arranged rings due to the change of the phase parameter value. However, due to the hardware limitations of the actual transceiver, indefinite arrangement of data in I/Q constellation is impossible, and selection of an appropriate phase parameter value is required. However, even if a small phase parameter value is applied, the QPSK signal can be changed to the I/Q constellation shape of a high-dimensional MPSK signal such as 8PSK and 16PSK, and thus information security functionality can be obtained by hiding the phase shape of the original data.

Referring to FIG. 6 , first, the degree of phase division (I _p ) is determined, and by using the same length (n) as the I/Q signal as an input value, random binary data of the length of the sum of I _p and n can be created. There is (S610). Then, the generated binary data is converted into decimal data (S620), and each of the converted decimal data is divided by 2 I _p squared to calculate a phase change factor having a range of (0, 2π) (S630).

7 is a diagram illustrating I/Q data to which a phase parameter is applied in a complex plane according to an exemplary embodiment. And FIG. 8 is a view showing a waveform of an RF signal to which a phase parameter is applied in the waveform of FIG. 3 .

The phase parameter generated through the method of FIG. 6 may be added to the phase of the original data, and may give rotation to the I/Q constellation. That is, the phase parameter may rotate the phase of each of the I/Q data in the I/Q signal. Due to this, the changed I/Q constellation may represent a rotated form different from the original form as shown in FIG. 7 . Also, the QPSK waveform shown in FIG. 3 may change as shown in FIG. 8 due to the influence of the phase parameter.

9 is a diagram schematically illustrating a method of modulating data in a symbol form in the prior art, and FIG. 10 is a diagram schematically illustrating a method of independently modulating a header and data bits according to an embodiment of the present disclosure.

When the ring-type noise communication method of the present disclosure is applied to an existing transceiver, there are essential considerations. For example, in order to restore the modulated data, it is necessary to accurately extract the envelope including the M and ∮ values. In particular, in order to accurately apply the values included in the envelope to each data value, the received data must be synchronized so that the data arrangement must be exactly correct. For such accurate synchronization, a method of pre-processing an RF signal through information such as MPSK or a sample rate of a transmitted signal and a method of using a data header are required.

The functions that change according to the modulation during the RF signal pre-processing are the carrier synchronizer algorithm and the frequency offset estimator function. Usually, the carrier synchronizer algorithm uses the Phase Locked Loop (PLL) method. Since the PLL function changes according to the phase value, in order for the receiver to obtain original data by demodulating the modulated data, the transceiver must share the same dimension of MPSK phase information. In the case of using the ring-type noise communication method according to an embodiment, since the received RF signal is modulated with MPSK of a different dimension from the MPSK of the original data under the influence of the value ∮, the PLL setting of the receiver must match the changed MPSK dimension. . Similarly, the frequency offset estimator must also be adapted to the changed MPSK dimension for the same reason.

In the case of a general receiver, since the bit length of the transmitted data header is known in advance, the data in the form of a symbol is received, the length of the symbol is calculated, and an accurate data start point can be identified based on this. However, when a signal is modulated using the conventional modulation method as shown in FIG. 9, since the header is also noise-modulated, the length of the header replaced with a symbol is also changed. When the length of the header is changed, it becomes difficult to find the exact starting point of the data, so it is difficult for the receiver to demodulate the data.

According to an embodiment of the present disclosure, a method of independently processing a header and a message data bit without preprocessing at the same time is used. For example, a data bit may be separated from a header, only a data bit portion may be replaced with a symbol through MPSK modulation, and the noise communication method of the present disclosure may be applied for modulation. Then, a symbol-type header having the same pattern and length may be generated and merged with the modulated data bit portion to configure the entire symbol data. A separately generated symbol-type header may have the same length regardless of any phase parameter. The use of the same shared header allows the ring-shaped signal to achieve accurate data alignment for synchronization, even if the MPSK modulation dimension changes over a flexible phase-changing phase. In other words, since a symbol-type header with the same pattern and length is used, even if the MPSK dimension is changed due to a change in the MPSK dimension of the data message (that is, the M value of M-ary) or the ∮ value, the receiver receives the correct data starting point. can be found

Referring to FIG. 10 , the original data bit portion 1010 is QPSK-modulated at the original length b to have a symbol shape 1020 of length b/log ₂ 4 , and thereafter, a ring shape according to the determined degree of phase division (I _p ) It may be noise modulated (1030). In addition, the symbol header 1040 having the same pattern and length A as the original header and the noise-modulated data bit portion 1030 may be finally combined and used for data transmission.

11 is a graph illustrating a bit error rate (BER) according to a minimum value I _m of a magnitude parameter. And FIG. 12 is a graph showing the probability of modulation identification (PMI) according to the minimum value I _m of the magnitude parameter.

In the case of a conventional transceiver using QPSK modulation, the bit error rate P for demodulation of received data is as follows.

The Q function represents the tail distribution function of the standard normal distribution, E _s represents the average energy per symbol, and N ₀ represents the noise spectral density.

When the receiver does not know the value of ∮ for the signal to which the ring-type noise communication method is applied, the restored signal always has a BER value of 0.5. However, when the receiver knows the value of ∮, the bit error rate P is I _m as shown in Equation 4 below. It can be changed according to the value.

Referring to FIG. 11 , as the value of I _m decreases, the BER value increases. Through this, it can be seen that as the noise modulation increases, the error rate increases, resulting in performance degradation. Therefore, depending on the value of I _m , the restored signal may have some performance degradation. However, since the bit error rate is 0.5 BER in any case when the receiver does not know the value of ∮, the noise modulation method of the present disclosure can have superior security performance to the receiver in which the envelope is not shared.

FIG. 12 is a graph obtained by using a _{Convoluational} Neural Network (CNN) technique, which is one of artificial intelligence (AI) techniques, for PMI according to an Im value in the same environment as FIG. 11 . Referring to FIG. 12 , it can be seen that the PMI value also decreases as the I _m value decreases, and it can be confirmed that the accurate modulation method becomes difficult to distinguish when the I _m value is about 0.3. In other words, as the noise modulation increases, the probability of identification of modulation decreases, and it is difficult to know the PSK modulation dimension, so it is difficult to restore the original signal, so it can be seen that the security performance is improved. Therefore, it is possible to obtain an _Im value that has a minimum performance degradation and is capable of superior communication security performance through FIG. 12 .

13 is a flowchart illustrating a noise communication method of a digital signal according to an exemplary embodiment.

In step S1301, an I/Q signal may be obtained by modulating a digital signal through a transmitter. According to an embodiment, a header and a data bit may be distinguished from a digital signal, a symbol-type header having the same pattern and length as the header may be generated, and the data bit may be MPSK-modulated to replace the data bit with a symbol-type data bit. In addition, in step S1302 to be described below, a symbol-type data bit may be modulated into a noise form, and a symbol-type header and a symbol-type modulated data bit may be combined for transmission.

In step S1302, the I/Q signal may be modulated into a noise form based on the phase parameter and the magnitude parameter. According to an embodiment, the phase parameter rotates the phase of the I/Q signal and may be generated based on the phase division value and the length value of the I/Q signal. For example, the transmitter modulating the I/Q signal generates random binary data having a length obtained by adding a phase division value and a length value of the I/Q signal, replaces the random binary data with decimal data, and divides the decimal data and the phase. A phase parameter can be created by calculating a phase modifying factor based on the value. According to an embodiment, the magnitude parameter adjusts the strength of the I/Q signal and may include a value between 0 and 1. And, the noise shape may correspond to ring-shaped white noise.

In step S1303, the modulated I/Q signal may be transmitted to the receiver. According to an embodiment, the transmitter may share an envelope related to the digital signal with the receiver. In this case, the envelope may include a phase division value related to the phase parameter and a minimum value of the magnitude parameter. Additionally, the envelope may further include modulation information of the signal (eg, a dimension of MPSK).

In step S1304, the modulated I/Q signal may be restored through the receiver and demodulated into a digital signal. According to an embodiment, modulation and demodulation of a digital signal may be based on a QPSK method.

Such a noise communication method according to an embodiment of the present disclosure may be recorded as a program to be executed by a computer and implemented through a computer-readable non-transitory recording medium.

14 is a block diagram illustrating a digital signal noise communication system according to an embodiment.

The noise communication system 1400 according to an embodiment of the present disclosure may include a transmitter 1410 and a receiver 1420 . The receiver 1420 of FIG. 14 may be a receiver that shares an envelope with the transmitter 1410 , or may be a receiver that does not.

According to an embodiment, the noise communication system 1400 modulates a digital signal through the transmitter 1410 to obtain an I/Q signal, and modulates the I/Q signal into a noise form based on a phase parameter and a magnitude parameter. can In addition, the noise communication system 1400 transmits the modulated I/Q signal from the transmitter 1410 to the receiver 1420, and restores the modulated I/Q signal through the receiver 1420 to demodulate it into a digital signal. have. Duplicate descriptions of embodiments that may be performed using the transmitter 1410 and the receiver 1420 of the noise communication system 1400 will be omitted.

The above description is merely illustrative of the technical idea of the present specification, and various modifications and variations will be possible without departing from the essential quality of the present specification by those skilled in the art to which this specification belongs. Accordingly, the embodiments disclosed in the present specification are for explanation rather than limiting the technical spirit of the present specification, and the scope of the technical spirit of the present specification is not limited by these embodiments. The protection scope of the present specification should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present specification.

Claims (11)

A noise communication method of a digital signal in a transceiver, comprising:
modulating the digital signal through a transmitter to obtain an I/Q signal;
modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter through the transmitter;
transferring the modulated I/Q signal to a receiver; and
Restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal,
the phase parameter rotates the phase of the I/Q signal, and is generated based on a phase division value and a length value of the I/Q signal;
The method further comprises generating the phase parameter via the transmitter, wherein generating the phase parameter comprises:
generating random binary data having a length obtained by adding the phase division value and the length value of the I/Q signal;
replacing the random binary data with decimal data; and
and calculating a phase modifying factor based on the decimal data and the phase division value. delete delete According to claim 1,
The magnitude parameter adjusts the strength of the I/Q signal, and includes a value between 0 and 1. A noise communication method of a digital signal in a transceiver, comprising:
modulating the digital signal through a transmitter to obtain an I/Q signal;
modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter through the transmitter;
transferring the modulated I/Q signal to a receiver; and
Restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal,
the transmitter shares an envelope associated with the digital signal with the receiver,
wherein the envelope includes a phase division value related to the phase parameter and a minimum value of the magnitude parameter. According to claim 1,
The noise form corresponds to ring-shaped white noise. A noise communication method of a digital signal in a transceiver, comprising:
modulating the digital signal through a transmitter to obtain an I/Q signal;
modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter through the transmitter;
transferring the modulated I/Q signal to a receiver; and
Restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal,
The step of modulating the digital signal to obtain the I/Q signal comprises:
distinguishing a header and a data bit in the digital signal;
generating a header in the form of a symbol having the same pattern and length as the header; and
Comprising the step of MPSK-modulating the data bits and replacing the data bits in the form of symbols, noise communication method. 8. The method of claim 7,
The step of modulating the I/Q signal comprises:
modulating the data bits in the symbol form into the noise form based on the phase parameter and the magnitude parameter; and
and merging the symbol type header and the symbol type modulated data bits. According to claim 1,
The modulation and demodulation of the digital signal is based on a Quadrature Phase Shift Keying (QPSK) method, a noise communication method. A digital signal noise communication system comprising:
The system comprises a transmitter and a receiver, the system comprising:
modulating the digital signal through the transmitter to obtain an I/Q signal,
modulates the I/Q signal into a noise form based on a phase parameter and a magnitude parameter through the transmitter;
passing the modulated I/Q signal to the receiver through the transmitter,
demodulate to a digital signal by restoring the modulated I/Q signal through the receiver;
the phase parameter rotates the phase of the I/Q signal, and is generated based on a phase division value and a length value of the I/Q signal;
The noise communication system,
generating random binary data having a length obtained by adding the phase division value and the length value of the I/Q signal;
replacing the random binary data with decimal data,
and calculating a phase modifying factor based on the decimal data and the phase division value. A computer-readable non-transitory recording medium recording a program for executing a method for communicating noise in a digital signal in a computer, the method comprising:
modulating the digital signal through a transmitter to obtain an I/Q signal;
modulating the I/Q signal into a noise form based on a phase parameter and a magnitude parameter via the transmitter;
transferring the modulated I/Q signal to a receiver; and
Restoring the modulated I/Q signal through the receiver and demodulating it into a digital signal,
the phase parameter rotates the phase of the I/Q signal, and is generated based on a phase division value and a length value of the I/Q signal;
The method further comprises generating the phase parameter via the transmitter, wherein generating the phase parameter comprises:
generating random binary data having a length obtained by adding the phase division value and the length value of the I/Q signal;
replacing the random binary data with decimal data; and
and calculating a phase modifying factor based on the decimal data and the phase division value.

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