KR20190108292A - Method and apparatus for calculating jamming power - Google Patents

Abstract

The present invention relates to jamming power calculation technology. According to the present invention, a jamming power calculation method can comprise the steps of: estimating transmission signal strength of a transmitter based on received signal strength measured from a sensor receiving a transmission signal of the transmitter; estimating reception signal strength when the transmission signal is received by a jamming target receiver based on the estimated transmission signal strength and position information of the jamming target receiver; and calculating power to be used for jamming the jamming target receiver based on the estimated reception signal strength.

Description

Jamming Power Computing Device and Method {METHOD AND APPARATUS FOR CALCULATING JAMMING POWER}

The present invention relates to an apparatus and method for computing power to be used for jamming a jamming target receiver.

Jamming technology radiates very high frequency (Radio Frequency) energy and disturbs a specific frequency or signal in the field.

In this case, when a jamming signal is generated in a state where no PIA is identified, a friendly signal may be disturbed, so a process of detecting and identifying a signal before jamming of the jamming system needs to be preceded. In addition, there is a need to minimize power waste generated during jamming operations.

Korea Patent Registration 10-1076034 (October 17, 2011)

In an embodiment of the present invention, a jamming power calculation technique for improving jamming performance by increasing the accuracy of jamming power for a receiver to be jammed is provided.

Specifically, in the embodiment of the present invention, the jamming target is estimated by estimating the RSS of the transmitter and the jamming target receiver based on a received signal strength indicator (RSS) measured by a plurality of sensors receiving the transmitter's transmission signal. We propose a technique for calculating jamming power for a receiver.

The problem to be solved by the present invention is not limited to the above-mentioned, another problem to be solved is not mentioned can be clearly understood by those skilled in the art from the following description. will be.

According to an embodiment of the present invention, the method may further include estimating a transmission signal strength of the transmitter based on the RSS measured by a sensor receiving the transmission signal of the transmitter; Estimating received signal strength when the transmitted signal is received by the jamming target receiver based on the estimated transmission signal strength and position information of the jamming target receiver; And calculating power to be used for jamming the jamming target receiver based on the estimated received signal strength.

Here, the plurality of sensors, a step of estimating a plurality of transmission signal strength of the transmitter for each of the plurality of sensors; Estimating a plurality of received signal strengths when the transmitted signals are received by the jamming target receiver based on the estimated plurality of transmitted signal strengths; And calculating an average of the estimated plurality of received signal strengths.

The calculating may include calculating an average power of the transmitter based on a result of calculating an average of the plurality of received signal strengths; Calculating received signal strengths for each of the plurality of sensors based on the average power of the transmitter; And correcting an error of a result of calculating an average of the received signal strength by calculating a difference value between the calculated received signal strengths for each of the plurality of sensors and the measured received signal strengths for each of the measured sensors. It may include a step.

In addition, the received signal strength when the transmission signal is received by the jamming target receiver may be estimated through a path loss model.

The estimating of the received signal strength when the transmission signal is received by the jamming target receiver may include converting at least one sensor included in a predetermined range of the received signal strength measured by the sensor into a radio contour. It may include the step of setting separately.

According to an embodiment of the present invention, the transmission signal strength of the transmitter is estimated based on the received signal strength measured by the sensor receiving the transmission signal of the transmitter, and based on the estimated transmission signal strength and position information of the jamming target receiver. An estimator for estimating a received signal strength when the transmitted signal is received by the jamming target receiver; And an operation unit configured to calculate power to be used for jamming the jamming target receiver based on the estimated received signal strength.

According to an embodiment of the present invention, by jamming power for a jamming target receiver by allocating jamming power for the receiver by estimating the signal strength of the transmitter and the receiver that is the jamming target based on the RSS measured by the sensor receiving the transmitter's transmission signal. Increase accuracy and jamming power efficiency.

1 is a block diagram of a jamming system including a jamming power calculating device according to an embodiment of the present invention.
2 is a flowchart illustrating a jamming power calculation method according to an embodiment of the present invention.
3 is a diagram exemplarily illustrating a process of estimating a transmission signal strength and a reception signal strength of FIG. 2.
4 to 9 are simulation graphs showing results of a bit error rate (BER) performance analysis according to a signal strength estimation error.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms, only the embodiments are to make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the scope of the invention is defined only by the claims.

In describing the embodiments of the present invention, detailed descriptions of well-known functions or configurations will be omitted unless they are actually necessary in describing the embodiments of the present invention. In addition, terms to be described below are terms defined in consideration of functions in the embodiments of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the contents throughout the specification.

In an embodiment of the present invention, to provide a jamming power calculation technique for improving the jamming accuracy and jamming power efficiency for the receiver to be jammed, and specifically, based on the RSS measured by the sensor receiving the transmitter's transmission signal, We want to estimate the signal strength of the receiver.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a block diagram of a jamming system 10 including a jamming power computing device according to an embodiment of the present invention.

The jamming system 10 as shown in FIG. 1 includes a transmitter T, a jamming target receiver R, a multisensor group S composed of a plurality of sensors S1 to Sn, and a multisensor group S. It may include a jamming power calculation device 100 connected to.

The transmitter T, for example, as an enemy transmitter, can transmit any symbol sequence in any of the modulation schemes it can transmit.

The modulation scheme M may be expressed as in Equation 1 below, and the symbol sequence may be represented as in Equation 2 below.

은 가능한 변조 방식 개수,

은 전송된 심벌의 개수, 그리고

는 전송된

번째 심벌을 의미한다.here,

Is the number of possible modulation schemes,

Is the number of symbols transmitted, and

Sent

The first symbol.

The jamming target receiver R is an enemy receiver which needs jamming, for example, and can receive the transmission signal transmitted from the transmitter T. FIG.

Each of the sensors S1 to Sn of the multi-sensor group S may receive a transmission signal of the transmitter T through an independent channel, and may transmit the received signal to the jamming power calculating device 100. In this case, it is assumed that each of the sensors S1 to Sn knows the frequency of the signal transmitted from the transmitter T in advance and can measure the RSS of the received signal. In RSS, for example, dBm (decibels above 1 milliwatt) unit may be applied.

The jamming power calculating device 100 may receive signals received by the sensors S1 to Sn and estimate the transmission signal strength of the transmitter T based on the RSS of these signals. In addition, the jamming power calculation apparatus 100 calculates a plurality of received signal strengths when a transmission signal is received by the jamming target receiver R based on the estimated plurality of transmission signal strengths and the position information of the jamming target receiver R. Estimating and calculating power to be used for jamming the jamming target receiver R based on the estimated plurality of received signal strengths. In addition, the jamming power calculation apparatus 100 may calculate an average of the estimated plurality of received signal strengths, calculate the average power of the transmitter T based on the result of calculating the average of the plurality of received signal strengths, Based on the average power of the transmitter T, the received signal strength indices of the respective sensors S1 to Sn are calculated, and the difference between the calculated received signal intensity indices and the measured received signal strength indices is calculated. The error of the result of calculating the average of the intensities can be corrected.

The jamming power calculator 100 may include a receiver 110, a determiner 120, an estimator 130, and an operator 140.

The receiver 110 may receive a signal of the transmitter T received by each of the sensors S1 to Sn of the multi-sensor group S.

The determiner 120 may determine a modulation scheme for the signal from the signal received through the receiver 110. For modulation scheme determination, for example, an Automatic Modulation Classification (AMC) technique may be applied.

The estimator 130 estimates the signal strength when the signal is transmitted from the transmitter T, that is, the transmission signal strength, based on the result of the modulation scheme determination and the RSS of the signal received through the receiver 110. Based on the transmitted signal strength and the position information of the jamming target receiver R, the received signal strength when the transmission signal is received by the jamming target receiver R can be estimated. Such transmit signal strength or received signal strength may be, for example, Bit Energy / Noise Power Spectral Density. In addition, the received signal strength may be estimated through, for example, a path loss model.

The calculator 140 may calculate power to be used for jamming the jamming target receiver R based on the received signal strength estimated by the estimator 130. At this time, for example, at least one of additive white Gaussian noise (AWGN) jamming, pulse jamming, and tone jamming may be used as a jamming technique for allocating jamming power according to the calculated jamming power.

Hereinafter, the above-described configuration will be described in more detail with reference to the flowchart of FIG. 2 attached to the jamming power calculation method of the jamming power calculation apparatus 100 according to the embodiment of the present invention.

Prior to the description of the embodiment, the jamming power computing device 100 according to the embodiment of the present invention preliminarily measures the positions of the respective sensors in the multi-sensor group S and the positions of the transmitter T and the jamming target receiver R in advance. It is assumed that you are aware of it. The position of the transmitter T and the receiver to be jammed can be determined through various positioning techniques, such as satellite observation, direction detection, and the like. If it can be easily understood, a detailed technical description will be omitted.

In addition, the jamming power calculation apparatus 100 according to an embodiment of the present invention assumes and knows a path loss factor in a region of interest.

As illustrated in FIG. 2, the jamming power calculation apparatus 100 may receive a signal from the multi-sensor group S that receives the transmission signal of the transmitter T (S100).

The jamming power computing device 100 may generate a radio contour map using the RSS. Here, the wireless contour map may be generated with a certain RSS range (for example, A: 00 [dBm] to 00 [dBm], B: 00 [dBm] to 00 [dBm], C: ...), At this time, the RSS range may vary according to the position of the multi-sensor group S and the received RSS. For example, the RSS ranges of the respective sensors S1 to Sn may be divided into a predetermined number of wireless contour lines based on the maximum and minimum values of RSS of the multi-sensor group S, and the number of RSS ranges is the wireless contour line. It may vary depending on the number of. In this case, the number of wireless contour lines may be set in consideration of the calculation amount of the jamming system.

The jamming power calculation apparatus 100 may estimate the transmission signal strength of the transmitter T based on the RSS (S102).

3 exemplarily illustrates a case of estimating such a transmission signal strength.

이라고 했을 때, 동일한 무선 등고선에 포함된 아군의 수신기는

개이고, 아군의

번째 수신기에서 측정된 RSS

[dBm], 아군의

번째 수신기와 적 송신기 사이의 거리

[m], 그리고 경로 손실 계수

를 알고 있을 때 아군의

번째 수신기에서 추정한 송신기(T)에서의 송신 신호 세기

[dBm]는 경로 손실 모델을 통해 다음 [수학식 3]과 같이 추정할 수 있다.The total number of friendly receivers

, The receivers of allies included in the same radio contour

Dog, friendly

Measured by the first receiver

[dBm], friendly

Distance between the first receiver and the enemy transmitter

[m], and path loss factor

When you know a friendly

Signal strength at transmitter T estimated by second receiver

[dBm] can be estimated using Equation 3 through the path loss model.

[m]는 참조 거리로서, 예를 들어 1로 설정할 수 있다. 따라서, 각각의 센서들(S1~Sn)에 대해 송신기(T)의 송신 신호 세기

[dBm]를 추정할 수 있다.In [Equation 3]

[m] is a reference distance and can be set to, for example. Thus, the transmission signal strength of the transmitter T for each of the sensors (S1 ~ Sn)

[dBm] can be estimated.

Subsequently, the jamming power calculation apparatus 100 may estimate the received signal strength when the transmission signal is received by the jamming target receiver R based on the estimated transmission signal strength and the position information of the jamming target receiver R. (S104).

를 기준으로 재밍 대상 수신기(R)에서의 수신 신호 세기

를 다음 [수학식 4]와 같이 추정할 수 있다.In order to calculate the average of the transmission signal strength at the transmitter T, it is necessary to set one criterion, and the distance between the transmitter T and the receiver to be jammed R

Received signal strength at the jamming target receiver R

Can be estimated as shown in Equation 4.

In this case, the average of the estimated received signal strength in the jamming target receiver R may be expressed as Equation 5 below.

을 이용하여 송신기(T)에서의 송신 신호 세기

을 재 추정할 필요가 있으며, 이와 같이 재 추정된 송신기(T)에서의 송신 신호 세기는 다음 [수학식 6]과 같이 표현될 수 있다.On the other hand, in order to correct the received signal strength at the jamming target receiver R estimated in step S104, the average of the received signal strength of [Equation 5]

Transmit signal strength at transmitter T using

Needs to be re-estimated, and the transmission signal strength of the re-estimated transmitter T can be expressed by Equation 6 below.

를 이용하여 각각의 센서들(S1~Sn)에서의 신호 세기를 계산할 수 있으며, 이러한 신호 세기는 다음 [수학식 7]과 같이 표현될 수 있다.Then, the average transmitted signal strength at the reestimated transmitter T

The signal strength of each of the sensors (S1 ~ Sn) can be calculated using, and this signal strength can be expressed as Equation 7 below.

번째 센서에서 실제 측정된 신호 세기

와, 추정된 송신기(T)에서의 평균 송신 신호 세기

에 따른 센서의 신호 세기

에는 오차

가 발생할 수 있으며, 최종적으로 추정한 재밍 대상 수신기(R)에서의 수신 신호 세기

은 다음 [수학식 8]로 표현될 수 있다.therefore,

Signal strength actually measured at the first sensor

And average transmit signal strength at the estimated transmitter T

Signal strength

Error

May occur, and finally, the received signal strength at the jamming target receiver R

May be expressed as Equation 8 below.

는 오차의 평균을 나타낸다.In [Equation 8]

Represents the mean of the errors.

를 기초로, 재밍 대상 수신기(R)를 재밍시키는데 이용될 전력을 연산할 수 있다(S106).The jamming power computing device 100 receives the received signal strength at the jamming target receiver R finally estimated as described above.

Based on the calculation, the power to be used for jamming the jamming target receiver R may be calculated (S106).

4 to 9 are simulation graphs showing the results of a bit error rate (BER) performance analysis according to a signal strength estimation error, in which the noise power spectral density in the multi-sensor group (S) is the noise power in the jamming target receiver (R). Assume the same as spectral density.

4 shows the BER performance when the received signal strength estimation error is 10 [dB], and it can be seen that the performance deteriorates as much as the error of the estimated received signal strength occurs.

와 펄스 지속 시간을 선택해야 한다.FIG. 5 illustrates the result of pulse duration allocation when the received signal strength estimation error is 10 [dB], and it can be seen that the pulse duration varies according to the estimated received signal strength. The received signal strength must be accurately estimated. In order to maintain a specific BER performance,

And pulse duration must be selected.

6 illustrates a result of changing the jamming mode according to the estimated received signal strength, where 1 is AWGN jamming, 2 is tone jamming, and 3 is pulse jamming. It can be seen from the results of FIG. 6 that the jamming mode should be changed according to the estimated received signal strength in order to obtain an optimal jamming performance.

FIG. 7 illustrates a result of assigning an optimal jamming scheme according to the estimated received signal strength, and FIG. 8 is a graph illustrating a BER result when the optimal received signal strength is allocated according to the estimated received signal strength.

9 is a graph illustrating the optimal jamming power allocation result required according to the received signal strength to maintain a specific BER, for example BER 10 ^-3 .

As described above, according to an embodiment of the present invention, to provide a jamming power calculation technique for improving the jamming power accuracy and the jamming performance for the receiver to be jammed, and specifically measured by a sensor receiving a transmission signal of the transmitter The signal strength of the transmitter and the receiver is estimated based on the RSS.

On the other hand, the combination of each block in the accompanying block diagram and each step in the flowchart may be performed by computer program instructions. These computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions executed by the processor of the computer or other programmable data processing equipment are described in each block of the block diagram. It creates a means to perform the functions.

These computer program instructions may be stored on a computer usable or computer readable recording medium (or memory) or the like that may be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, thereby making the computer available. Alternatively, instructions stored on a computer readable recording medium (or memory) may produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram.

In addition, computer program instructions may be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to generate a computer or other program. Instructions that perform possible data processing equipment may also provide steps for performing the functions described in each block of the block diagram.

In addition, each block may represent a portion of a module, segment, or code that includes at least one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative embodiments, the functions noted in the blocks may occur out of order. For example, the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.

10: jamming system
T: transmitter (enemy)
R: Jamming Target Receiver
S: multiple sensor group (ally)
100: jamming power computing device
110: receiver
120: determination unit
130: estimator
140: operation unit

Claims (13)

Estimating the transmit signal strength of the transmitter based on the received signal strength measured by a sensor receiving the transmitter signal;
Estimating received signal strength when the transmitted signal is received by the jamming target receiver based on the estimated transmission signal strength and position information of the jamming target receiver; And
Calculating power to be used for jamming the jammed receiver based on the estimated received signal strength;
Jamming power calculation method. The method of claim 1,
The sensor is a plurality,
Estimating a plurality of transmission signal strengths of the transmitter for each of the plurality of sensors;
Estimating a plurality of received signal strengths when the transmitted signals are received by the jamming target receiver based on the estimated plurality of transmitted signal strengths; And
Calculating an average of the estimated plurality of received signal strengths;
Jamming power calculation method. The method of claim 2,
The calculating step,
Calculating an average power of the transmitter based on a result of calculating the average of the plurality of received signal strengths;
Calculating received signal strengths for each of the plurality of sensors based on the average power of the transmitter; And
Correcting an error of a result of calculating an average of the received signal strengths by calculating a difference value between the calculated received signal strengths of each of the plurality of sensors and the measured received signal strengths of each of the measured plurality of sensors. Containing
Jamming power calculation method. The method of claim 1,
The received signal strength when the transmission signal is received by the jamming target receiver is estimated through a path loss model.
Jamming power calculation method. The method of claim 1,
Estimating a received signal strength when the transmitted signal is received by the jamming target receiver,
And dividing and setting at least one sensor included in a predetermined range of the received signal strength measured by the sensor into a radio contour.
Jamming power calculation method. Estimating a transmission signal strength of the transmitter based on the received signal strength measured by a sensor receiving the transmitter's transmission signal;
Estimating received signal strength when the transmitted signal is received by the jamming target receiver based on the estimated transmission signal strength and position information of the jamming target receiver; And
A program including instructions for calculating a power to be used for jamming the jamming target receiver based on the estimated received signal strength is recorded
Computer-readable recording media. Estimating a transmission signal strength of the transmitter based on the received signal strength measured by a sensor receiving the transmitter's transmission signal;
Estimating received signal strength when the transmitted signal is received by the jamming target receiver based on the estimated transmission signal strength and position information of the jamming target receiver; And
Calculating power to be used for jamming the jamming target receiver based on the estimated received signal strength
Computer program stored on a computer readable recording medium. The transmission signal strength of the transmitter is estimated based on the received signal strength measured by the sensor receiving the transmission signal of the transmitter, and the transmission signal is the jamming target based on the estimated transmission signal strength and the position information of the jamming target receiver. An estimator for estimating received signal strength when received by a receiver; And
A calculation unit configured to calculate power to be used for jamming the jamming target receiver based on the estimated received signal strength;
Jamming power computing device. The method of claim 8,
The sensor is a plurality,
The estimating unit,
Estimating a plurality of transmission signal strengths of the transmitter for each of the plurality of sensors, and each of the plurality of received signal strengths when the transmission signal is received by the jamming target receiver based on the estimated plurality of transmission signal strengths Presumed
Jamming power computing device. The method of claim 9,
The calculation unit,
Computing an average of the estimated plurality of received signal strengths
Jamming power computing device. The method of claim 10,
The calculation unit,
The average power of the transmitter is calculated based on a result of calculating the average of the plurality of received signal strengths, the received signal strength of each of the plurality of sensors is calculated based on the average power of the transmitter, and the calculated Compensating an error for a result of calculating an average of the received signal strength by calculating a difference value between the received signal strength for each of the plurality of sensors and the received signal strength for each of the measured plurality of sensors.
Jamming power computing device. The method of claim 8,
The received signal strength when the transmitted signal is received by the jamming target receiver is estimated through a path loss model.
Jamming power computing device. The method of claim 8,
The estimating unit,
Setting at least one sensor included in a predetermined range of the received signal strength measured by the sensor to be divided into wireless contour lines
Jamming power computing device.

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