CN114584253A - Grid-based suppressed area calculation method for directed communication interference - Google Patents
Grid-based suppressed area calculation method for directed communication interference Download PDFInfo
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- CN114584253A CN114584253A CN202210080788.6A CN202210080788A CN114584253A CN 114584253 A CN114584253 A CN 114584253A CN 202210080788 A CN202210080788 A CN 202210080788A CN 114584253 A CN114584253 A CN 114584253A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a grid-based calculation method for a pressed area aiming at directed communication interference, which comprises the following steps of firstly, initializing calculation parameters, wherein the calculation parameters comprise communication frequency, communication transmitter output power, communication transmitting antenna gain, communication interference antenna gain changing along with the direction, communication interference transmitter output power, a communication interference pressing coefficient, a communication interference machine position, a communication transmitter position, a communication receiver position and interference region center coordinates; dividing a calculation grid around a communication jammer along the azimuth and the distance, and initializing the azimuth and the distance step length; traversing the whole azimuth plane of the directional communication interference antenna beam with azimuth angle step length, calculating interference suppression conditions, stepping according to distance step length, and calculating the communication interference suppression conditions in the range from 0 to the distance d of visibility, thereby obtaining the shape of a communication interference suppression area; the invention can obtain the shape of the communication interference suppression area under the condition of directional communication interference.
Description
Technical Field
The invention belongs to the technical field of communication countermeasure, and particularly relates to a grid-based suppression area calculation method for directed communication interference.
Background
For wireless communication systems, wireless communication interference technology is more and more advanced, and its interference antenna is developing in a direction to achieve the purposes of concentrating interference power and reducing internal mutual interference. In order to improve the anti-interference capability of the communication technology, the shape of a communication interference suppression area under the condition of directional communication interference needs to be studied deeply. The existing textbooks and published documents only calculate the shape of the communication interference suppression area aiming at the omnidirectional communication interference antenna, and the research on the shape of the suppression area aiming at the directional communication interference is lacked.
Disclosure of Invention
In view of this, the present invention provides a grid-based method for calculating a suppressed area for directional communication interference, which can obtain a shape of a suppressed area for communication interference under a condition of directional communication interference.
The technical scheme for realizing the invention is as follows:
a grid-based squashed area calculation method for directed communication interference comprises the following steps:
initializing calculation parameters, wherein the calculation parameters comprise communication frequency, communication transmitter output power, communication transmitting antenna gain, communication interference antenna gain changing along with the direction, communication interference transmitter output power, a communication interference suppression coefficient, a communication interference machine position, a communication transmitter position, a communication receiver position and interference region center coordinates; dividing a calculation grid around a communication jammer along the azimuth and the distance, and initializing the azimuth and the distance step length;
and step two, traversing the whole azimuth plane of the directional communication interference antenna beam by azimuth angle step length, calculating interference suppression conditions, stepping according to distance step length, and calculating the communication interference suppression conditions in the range from 0 to the clear distance d, thereby obtaining the shape of a communication interference suppression area.
Further, in the second step, the step of traversing the azimuth to calculate the interference suppression condition specifically comprises:
and calculating the effective radiation power of the communication jammer in a certain azimuth angle.
Further, in the second step, the step of traversing the distance step to calculate the communication interference suppression condition within the range from 0 to the visibility distance d is specifically:
step a: calculating the power of a communication transmitter received by a communication receiver;
step b: calculating the communication interference power received by the communication receiver;
step c: calculating the ratio of interference signals received by a communication receiver to communication signal power, namely an interference-signal ratio;
step d: marking of the interference-suppressed or interference-exposed areas: if the signal ratio is larger than the communication interference suppression coefficient, the signal ratio is an interference suppression area, otherwise, the signal ratio is an interference exposure area.
And further, adjusting the calculation parameters, and observing the change condition of the shape of the communication interference suppression area along with different calculation parameters.
Drawings
Fig. 1 is a flow chart of a grid-based computation of a blackout zone for directional communication interference.
Fig. 2 is a communication transceiver and communication jammer deployment diagram (horizontal plane).
Fig. 3 is an example communication interference antenna beam pattern.
Fig. 4 is a basic diagram.
Fig. 5 is a graph obtained by increasing the effective radiation power of the communication interference by 2 times on the basis of fig. 4.
Fig. 6 is a graph obtained by increasing the effective radiation power of the communication interference by 3 times based on fig. 4.
Fig. 7 is a basic diagram.
Fig. 8 is a graph obtained by increasing the effective radiation power of the communication interference by 2 times on the basis of fig. 7.
Fig. 9 is a graph obtained by increasing the effective radiation power of the communication interference by 3 times on the basis of fig. 7.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a grid-based suppression zone calculation method for directed communication interference, which takes effective radiation power of communication interference, a directional communication interference antenna directional diagram, communication transceiver parameters, interference distance, communication distance, a communication interference suppression coefficient and communication interference beam direction as input and outputs an interference suppression zone shape graph.
When the heights of the communication jammer and the communication transceiver are not much larger than the communication distance and the interference distance, the communication transmission, the communication reception and the communication interference can be considered to be in the same horizontal plane, and the calculation process of the shape of the horizontal plane interference suppression area is as follows (see fig. 1):
step one, initializing calculation parameters, wherein the calculation parameters comprise communication frequency, communication transmitter output power, communication transmitting antenna gain, communication interference antenna gain which changes along with the direction, communication interference transmitter output power, a communication interference suppression coefficient, a communication jammer position (including height), a communication transmitter position (including height), a communication receiver position (including height), and interference region center coordinates (a connecting line from the communication jammer to the point represents interference beam direction); dividing a calculation grid around a communication jammer along the azimuth and the distance, and initializing the azimuth and the distance step length;
the radio line-of-sight range between the communication jammer and the communication receiver is calculated according to equation (1).
In the formula (I), the compound is shown in the specification,
d-visibility distance, km;
h1height of the communication jamming antenna (i.e. communication jamming machine height), m;
hRheight of the communication receiving antenna (i.e. communication receiver height), m.
And step two, calculating an interference suppression area according to the grid.
Traversing the whole azimuth plane of the directional communication interference antenna beam by azimuth angle step length, calculating interference suppression condition, and calculating the effective radiation power of the communication jammer in the angle direction according to a formula (2) for a given azimuth angle:
P(α)＝PtGt (2)
in the formula (I), the compound is shown in the specification,
p (α) -the effective radiated power of the communication jammer in the α -direction, W;
Pt-the output power of the communication interference transmitter, for the array antenna, is the product of the power amplifier of the cell and the number of cells, W;
Gt-communication interference antenna gain.
And stepping according to the distance step, and calculating the communication interference suppression condition in the range from 0 to the clear distance d, thereby obtaining the shape of the communication interference suppression area. The method specifically comprises the following steps:
a, step a: calculating the power of a communication transmitter received by a communication receiver;
firstly, the sight distance from a communication transmitter to a communication receiver and the Fresnel zone distance from the communication transmitter to the communication receiver are calculated, if the sight distance is not smaller than the Fresnel zone distance, the power of the communication transmitter received by the communication receiver is calculated by using a double-wire loss and Egli empirical formula, and if not, the power is calculated by using a free space propagation loss formula.
The distance calculation method of the Fresnel zone is shown in formula (3):
FZ＝[hT×hR×f]/24000 (3)
in the formula (I), the compound is shown in the specification,
FZ-Fresnel zone distance, km;
hTcommunication transmit antenna height (i.e. communication transmitter height), m;
hR-communication receiving antenna height, m;
f-communication frequency, MHz.
The empirical formula for Egli is as follows:
in the formula (I), the compound is shown in the specification,
Pr-communication transmitter power, w, received by the communication receiver;
f-communication frequency, MHz;
ht-height of the communication transmitting antenna, m;
hr-height of the communication receiving antenna, m;
Pt-communication transmitter output power, w;
Gtr-the gain of the communication transmit antenna in the direction of the communication receiver;
Grt-gain of the communication receiving antenna in the direction of the communication transmitter;
dtrthe distance between the communication transmitter and the communication receiver, m;
l-other losses, is a positive decibel number.
The application range is as follows: 1km < dtr <50 km; 30MHz < f <1 GHz.
The standard deviation of the power of the received signal of the communication will vary with frequency, as shown in the following empirical formula:
σ is 5lg f +2dB, and f is in MHz. The standard deviation ranges between about 9dB and 12dB, increasing with increasing frequency.
The free space propagation loss calculation method is shown in formula (5):
L＝(4×π)2d2/λ2 (5)
in the formula (I), the compound is shown in the specification,
l-free space propagation loss;
d is the distance of visibility;
λ -the emission signal wavelength.
The link distance is in the same units as the wavelength of the transmitted signal.
The two-line loss calculation method is shown in formula (6):
in the formula (I), the compound is shown in the specification,
d is the distance of visibility;
hT-a communication transmitting antenna height;
hR-communication receiving antenna height.
The see-through distance is the same as the unit of the antenna height.
If the communication received power is not less than the communication receiver sensitivity, the point is marked with a corresponding color (e.g., blue) at the location of the communication receiver, indicating a clear area of communication without interference.
Step b: calculating the communication interference power received by the communication receiver; the fresnel zone problem is considered similar to the method described above.
Step c: calculating the ratio of interference signals received by a communication receiver to communication signal power, namely an interference-signal ratio;
step d: marking of the interference-suppressed or interference-exposed areas: if the signal-to-noise ratio is greater than the communication interference suppression coefficient, the interference suppression area is marked by using a corresponding color (such as red), and otherwise, the interference suppression area is an interference exposure area.
And adjusting related parameters and observing the shape of the communication interference suppression area. The method can adjust the communication frequency, the output power of a communication transmitter, the gain of a communication transmitting antenna, the gain of a communication interference antenna beam changing along with the direction, the output power of a communication interference machine, the suppression coefficient of the communication interference, the position (including the height) of the communication interference machine, the position (including the height) of the communication transmitter, the central coordinate of an interference region, the number of simultaneous interference points and the like, and repeat the first step and the second step of calculation and observe the shape of the communication interference suppression region and the change condition of the communication interference suppression region along with different calculation parameters.
(1) When both the communication jammer and the communication use the horizontal omnidirectional antenna, the communication interference suppression area is in a regular shape.
Under the condition that the communication interference antenna and the communication antenna are all omnidirectional, the communication jammer is always positioned in an interference suppression area, and the communication clearance area is always arranged around the communication transmitter. If a plurality of interferences take precedence, the interference suppression area is expanded to the periphery of the communication transmitter, and the communication clear area is a circle surrounding the communication transmitter; if the communication and the interference are equivalent, an interference suppression area is arranged on one side of the communication jammer, and a communication smooth area is arranged on one side of the communication transmitter; if communication is dominant, the interference suppression zone is compressed to the periphery of the communication jammer, and the communication interference suppression zone is a circle surrounding the communication jammer.
(2) When the communication interference is directional and the communication is omnidirectional, the communication interference suppression area becomes irregular.
When the communication interference direction points to the direction of the communication transmitter, a plurality of interferences take precedence, a certain communication clear area is arranged around the communication transmitter in the direction of the interference wave beam pointing direction within the range of the azimuth angle slightly larger than the width of the interference wave beam, and the rest areas are interference suppression areas; if the communication and the interference are equivalent or the communication is dominant, the communication open area cuts off the interference suppression area in the direction of the interference beam and within the azimuth angle range slightly larger than the width of the interference beam. When the communication interference direction deviates from the direction of the communication transmitter, a certain communication clear area is formed on one side of the communication transmitter close to the direction of the interference wave beam, and the communication clear areas are on the other side.
The characteristics can powerfully guide the design and the application of communication interference and anti-interference equipment.
The following is exemplified by the above method.
(1) First, a description of the drawings will be given
Distance calculation involves figures 2-9, where:
fig. 2 is a communication transceiver and communication jammer deployment relationship diagram (horizontal plane). Wherein J is the position of the communication jammer; t is the position of the communication transmitter; r is the position of the communication receiver; d is the distance between the communication transmitter and the communication jammer; dc (xd, yd) is the interference region center coordinate.
Fig. 3 is an example communication interference antenna beam pattern. The antenna pattern can be a planned, simulated or measured antenna pattern, a horizontal plane, a vertical plane or any cross section.
Fig. 4 is a basic diagram.
Fig. 5 is a graph obtained by increasing the effective radiation power of the communication interference by 2 times on the basis of fig. 4.
Fig. 6 is a graph obtained by increasing the effective radiation power of the communication interference by 3 times based on fig. 4.
Fig. 7 is a basic diagram.
Fig. 8 is a graph obtained by increasing the effective radiation power of the communication interference by 2 times on the basis of fig. 7.
Fig. 9 is a graph obtained by increasing the effective radiation power of the communication interference by 3 times based on fig. 7.
(2) For example, calculation.
Assuming that the communication (interference) working frequency is 1000MHz, the output power of a communication transmitter is 1000W, the output power of a communication jammer is 15kW, the gains of communication receiving and transmitting antennas are all 1, the loss of a feeder line of the communication transmitter and the like and the loss of the communication jammer are all 1, and the suppression coefficient of the communication interference is 1; the sensitivity of the communication receiver is-90 dBm; the communication jammer is located at J (0km ), the origin of coordinates shown in fig. 2, and the communication transmitter is located at T (250km, 0km), the x coordinate axis shown in fig. 2; the communication transceiver and the communication jammer are arranged on an airplane, and the flying height of the airplane is 10000 m; the communication interference antenna beam gain is shown in fig. 3; the azimuth step is taken as 0.1 deg., and the distance step is taken as 5 km. The center of the communication interference region is Dc (200km,0km), namely, the direction pointing to the communication transmitter. The shape of the interference suppression zone is shown in red areas in FIGS. 4-6. Wherein FIG. 4 is a basic shape of the interference suppression zone calculated from the above given parameters; fig. 5 is a graph obtained by increasing the effective radiation power of the communication interference by 2 times based on fig. 4; fig. 6 is a graph obtained by increasing the effective radiation power of the communication interference by 3 times based on fig. 4.
The central coordinates of the interference region are set as Dc (200km,50km), namely, the central coordinates deviate from 50km upwards, and the rest parameters are unchanged. The shape of the interference suppression zone is changed to that shown in the red area of FIGS. 7-9. Wherein FIG. 7 is a basic pattern of the interference suppression zone calculated from the above given parameters; fig. 8 is a graph obtained by increasing the effective radiation power of the communication interference by 2 times based on fig. 7; fig. 9 is a graph obtained by increasing the effective radiation power of the communication interference by 3 times based on fig. 7.
Has the advantages that:
the communication interference suppression area calculation method provided by the invention simultaneously considers the factors of communication interference effective radiation power, communication interference beam shape, communication terminal parameters, interference distance, communication interference suppression coefficient, communication interference beam direction and the like, the influence of the communication distance and Fresnel area, and the communication clear area range under the non-interference condition.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A grid-based squashed area calculation method for directed communication interference is characterized by comprising the following steps:
initializing calculation parameters, wherein the calculation parameters comprise communication frequency, communication transmitter output power, communication transmitting antenna gain, communication interference antenna gain changing along with the direction, communication interference transmitter output power, communication interference suppression coefficient, communication interference machine position, communication transmitter position, communication receiver position and interference region center coordinate; dividing a calculation grid around a communication jammer along the azimuth and the distance, and initializing the azimuth and the distance step length;
and step two, traversing the whole azimuth plane of the directional communication interference antenna beam by azimuth angle step length, calculating interference suppression conditions, stepping according to distance step length, and calculating the communication interference suppression conditions in the range from 0 to the clear distance d, thereby obtaining the shape of a communication interference suppression area.
2. The grid-based method for calculating a blackout zone for directional communication interference according to claim 1, wherein in the second step, traversing azimuth angles to calculate interference blackout conditions specifically comprises:
and calculating the effective radiation power of the communication jammer in a certain azimuth angle.
3. The grid-based method for calculating a blackout zone for directed communication interference according to claim 1, wherein in the second step, the calculation of the communication interference blackout condition from the traversal distance step size 0 to the visibility distance d is specifically:
step a: calculating the power of a communication transmitter received by a communication receiver;
step b: calculating the communication interference power received by the communication receiver;
step c: calculating the ratio of interference signals received by a communication receiver to communication signal power, namely an interference-signal ratio;
step d: marking of the interference-suppressed or interference-exposed areas: if the signal ratio is larger than the communication interference suppression coefficient, the signal ratio is an interference suppression area, otherwise, the signal ratio is an interference exposure area.
4. The grid-based method for calculating the suppression area for the directional communication interference according to claim 1, wherein the calculation parameters are adjusted, and the shape of the suppression area for the communication interference is observed according to the change of the calculation parameters.
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| CN118549897A (en) * | 2024-05-30 | 2024-08-27 | 中国人民解放军火箭军工程大学 | A quantitative evaluation method for the anti-suppression jamming performance of mobile platform radar cooperative detection |
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Patent Citations (6)
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| US20100194650A1 (en) * | 2007-07-19 | 2010-08-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Antenna Weights Calculation Based on Users' Interference Rejection Capabilities |
| US20180006690A1 (en) * | 2015-04-24 | 2018-01-04 | Skylark Wireless, Llc | Technique for Full-Duplex Transmission in Many-Antenna MU-MIMO Systems |
| US20180290763A1 (en) * | 2015-12-10 | 2018-10-11 | JCD Optical (Cayman) Co., Ltd. | Sky tree and sky forest for unmanned aerial vehicles |
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