CN206237408U - A kind of high speed visible ray chaotic secret communication device based on visible LED - Google Patents
A kind of high speed visible ray chaotic secret communication device based on visible LED Download PDFInfo
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- CN206237408U CN206237408U CN201621187885.1U CN201621187885U CN206237408U CN 206237408 U CN206237408 U CN 206237408U CN 201621187885 U CN201621187885 U CN 201621187885U CN 206237408 U CN206237408 U CN 206237408U
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Abstract
A kind of high speed visible ray chaotic secret communication device based on visible LED of the utility model, including main chaotic oscillator module and from chaotic oscillator module；The main chaotic oscillator module and there are identical light source parameters and feedback device from chaotic oscillator module, both of which includes visible light source, wave filter, photo-coupler, attenuator, photodiode and amplifier；Modulator is additionally provided with main chaotic oscillator module, subtracter is being provided with from chaotic oscillator module；A kind of beneficial effect of the high speed visible ray chaotic secret communication device based on visible LED of the utility model is to be mixed useful information and chaotic carrier signal by modulator by main chaos module, useful information is hidden in chaotic signal, be conducive to significantly improving the security performance of visible light communication.
Description
Technical Field
The utility model relates to a secret communication technology field, in particular to high-speed chaos secret communication device of visible light based on visible light LED.
Background
The visible light communication technology is a communication mode which takes light obtained by visible light wave bands as an information carrier and directly transmits optical signals in the air; with the deep development and continuous promotion of global social informatization, communication users are continuously increased, and the visible light communication technology develops very rapidly with the obvious advantages of large capacity, high speed, interference resistance, strong practicability and the like. However, the security of information in the prior art visible light communication is weak, and information in the visible light communication is easily broken by a thief. In addition, chaos refers to a random-like irregular phenomenon existing in a deterministic nonlinear system, and chaotic signals have unique secret characteristics and can better hide information.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the lower defect of existence of visible light LED's communication security, the utility model discloses combine chaotic natural physics secret characteristic and visible light LED's high-speed transmission information ability, provide a high-speed visible light chaotic secret communication device based on visible light LED, improved visible light communication's security performance.
The utility model relates to a high-speed visible light chaotic secret communication device based on visible light LED, which comprises a master chaotic oscillator module and a slave chaotic oscillator module;
the master chaotic oscillator module and the slave chaotic oscillator module have the same light source parameters and feedback devices, and both comprise a visible light source, a filter, an optical coupler, an attenuator, a photodiode and an amplifier; the master chaotic oscillator module is also provided with a modulator, and the slave chaotic oscillator module is provided with a subtracter; wherein,
a visible light source I, a filter I, an optical coupler II and a photodiode II of the master chaotic oscillator are sequentially connected, and a chaotic carrier signal is output by the photodiode II; the other output end of the optical coupler I is sequentially connected with the attenuator I, the photodiode I and the amplifier I to form a feedback loop I which is connected with the visible light source I; the other output end of the optical coupler II is connected with a modulator, and the modulator is connected with a useful signal input end;
the visible light source II, the filter II, the optical coupler III, the photodiode III and the subtracter of the slave chaotic oscillator module are sequentially connected; the attenuator II, the optical coupler IV, the photodiode IV and the amplifier II at the other output end of the optical coupler III are sequentially connected to form a feedback loop II and connected with the visible light source II; the other input end of the subtractor is connected with the output end of an optical coupler V, the other output end of the optical coupler V is connected with the input end of an optical coupler IV, and the input end of the optical coupler V is connected with the chaotic carrier signal.
Furthermore, the visible light source I and the visible light source II are both LED light sources.
Further, optical isolators are arranged in the light source devices of the visible light source I and the visible light source II.
Further, erbium-doped fiber amplifiers are arranged in the feedback loop I and the feedback loop II to compensate power lost in transmission.
The utility model relates to a chaos secret communication device of high-speed visible light based on visible light LED's beneficial effect is through mixing useful information and chaos carrier signal through the modulator in the chaos module of owner, makes useful information hide in chaos signal, is favorable to showing the security performance who improves visible light communication.
Drawings
FIG. 1 is a schematic structural diagram of a master oscillator module of a high-speed visible light chaotic secure communication device based on a visible light LED;
FIG. 2 is a schematic structural diagram of a slave oscillator module of a high-speed visible light chaotic secret communication device based on a visible light LED;
in the figure: 1 is a visible light source I, 2 is an optical coupler I, 3 is a photodiode I, 4 is a filter I, 5 is an attenuator I, 6 is an amplifier I, 7 is a modulator, 8 is a subtracter, 10 is a visible light source II, 20 is an optical coupler II, 22 is an optical coupler III, 24 is an optical coupler IV, 26 is an optical coupler V, 30 is a photodiode II, 32 is a photodiode III, 34 is a photodiode IV, 40 is a filter II, 50 is an attenuator II, and 60 is an amplifier II.
Detailed Description
The high-speed chaotic secret communication device based on visible light LEDs of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a master oscillator module of a high-speed visible light chaotic secure communication device based on a visible light LED; fig. 2 is a schematic structural diagram of a slave oscillator module of a high-speed visible light chaotic secret communication device based on a visible light LED. As can be seen from the figure, the utility model relates to a high-speed visible light chaotic secret communication device based on visible light LED, which comprises a master chaotic oscillator module and a slave chaotic oscillator module; the master chaotic oscillator module generates chaotic signals through a self feedback loop, mixes useful information with the chaotic signals through the modulator 7 to generate chaotic carrier signals, and transmits the chaotic carrier signals mixed with the useful information to the slave chaotic oscillator module. The slave chaotic oscillator module receives the chaotic carrier signal transmitted by the master chaotic oscillator module, and subtracts the chaotic carrier signal from the chaotic signal generated by the slave chaotic oscillator module through a self feedback loop, so as to obtain useful information mixed in the chaotic carrier signal; the master chaotic oscillator module and the slave chaotic oscillator module are provided with the same light source parameters and feedback devices, and chaotic signals generated by the master chaotic oscillator module and the slave chaotic oscillator module through self feedback loops are highly similar.
The master chaotic oscillator module and the slave chaotic oscillator module respectively comprise a visible light source, a filter, an optical coupler, an attenuator, a photodiode and an amplifier; the master chaotic oscillator module is also provided with a modulator, and the slave chaotic oscillator module is provided with a subtracter; a visible light source I1, a filter I4, an optical coupler I2, an optical coupler II 20 and a photodiode II 30 of the master chaotic oscillator are sequentially connected, and a chaotic carrier signal is output by the photodiode II 30; the other output end of the optical coupler I2 is sequentially connected with an attenuator I5, a photodiode I3 and an amplifier I6 to form a feedback loop I which is connected with a visible light source I1; the other output end of the optical coupler ii 20 is connected to the modulator 7, and the modulator 7 is connected to the useful signal input end.
The visible light source II 10, the filter II 40, the optical coupler III 22, the photodiode III 32 and the subtracter 8 of the chaotic oscillator module are sequentially connected; an attenuator II 50, an optical coupler IV 24, a photodiode IV 34 and an amplifier II 60 at the other output end of the optical coupler III 22 are sequentially connected to form a feedback loop II and connected with the visible light source II 10; the other input end of the subtractor 8 is connected with the output end of an optical coupler V26, the other output end of the optical coupler V26 is connected with the input end of an optical coupler IV 24, and the input end of the optical coupler V26 is connected with the chaotic carrier signal.
Specifically, the basic principle of the high-speed visible light chaotic secret communication device based on the visible light LED is as follows: firstly, in a master chaotic oscillator module, a visible light source I is an LED lamp capable of generating visible light, and an optical isolator is inserted into a light source device in order to prevent external light feedback from an optical fiber end face or a coupler. The filter functions to determine the nonlinear visible wavelength. Then the light wave is divided into two parts by the coupler, one part is fed back to the light source device by the feedback loop, and the delay time and the feedback gain are respectively adjusted by adopting an optical fiber line and an attenuator on the feedback loop. Before the light wave is fed back to the light source, an erbium-doped fiber amplifier is needed to compensate the power lost in transmission. The chaotic signal generated by optical feedback is output from the master oscillator module after passing through the optical coupler, and before that, the modulator inserted in the link is used for modulating the added useful information, and the information is hidden in the optical chaotic carrier signal after being modulated, so that the encrypted output of the information is realized. The feedback loop of the slave oscillator adopts the same device components as those in the master oscillator module so as to achieve the purpose that the two modules generate synchronous chaotic carrier signals. And subtracting the optical chaotic carrier signal in the slave oscillator from the signal received by the master oscillator module to realize the decryption process of the information, thereby obtaining the required useful information. Because the master chaotic oscillator module and the slave chaotic oscillator module adopt the light source and the feedback device with the same parameters, and the generated chaotic carrier signals are highly similar, useful information to be transmitted can be obtained through subtraction operation at last.
The visible light source I1 and the visible light source II 10 are both LED light sources. The light source devices of the visible light source I1 and the visible light source II 10 are provided with optical isolators. Erbium-doped fiber amplifiers are arranged in the feedback loop I and the feedback loop II to compensate power lost in transmission.
Obviously, the utility model relates to a chaotic secret communication device of high-speed visible light based on visible light LED's beneficial effect is through mixing useful information and chaotic carrier signal through the modulator in the main chaotic module, makes useful information hide in chaotic signal, is favorable to showing the security performance who improves visible light communication.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements and the like that are within the spirit and principles of the present invention and are intended to be included within the scope of the present invention.
Claims (4)
1. A high-speed visible light chaotic secret communication device based on a visible light LED is characterized in that: the system comprises a master chaotic oscillator module and a slave chaotic oscillator module;
the master chaotic oscillator module and the slave chaotic oscillator module have the same light source parameters and feedback devices, and both comprise a visible light source, a filter, an optical coupler, an attenuator, a photodiode and an amplifier; the master chaotic oscillator module is also provided with a modulator, and the slave chaotic oscillator module is provided with a subtracter; wherein,
a visible light source I, a filter I, an optical coupler II and a photodiode II of the master chaotic oscillator are sequentially connected, and a chaotic carrier signal is output by the photodiode II; the other output end of the optical coupler I is sequentially connected with the attenuator I, the photodiode I and the amplifier I to form a feedback loop I which is connected with the visible light source I; the other output end of the optical coupler II is connected with a modulator, and the modulator is connected with a useful signal input end;
the visible light source II, the filter II, the optical coupler III, the photodiode III and the subtracter of the slave chaotic oscillator module are sequentially connected; the attenuator II, the optical coupler IV, the photodiode IV and the amplifier II at the other output end of the optical coupler III are sequentially connected to form a feedback loop II and connected with the visible light source II; the other input end of the subtractor is connected with the output end of an optical coupler V, the other output end of the optical coupler V is connected with the input end of an optical coupler IV, and the input end of the optical coupler V is connected with the chaotic carrier signal.
2. The high-speed chaotic secret communication device for visible light based on the visible light LED as claimed in claim 1, characterized in that: the visible light source I and the visible light source II are both LED light sources.
3. The high-speed chaotic secret communication device for visible light based on the visible light LED as claimed in claim 1, characterized in that: and optical isolators are arranged in the light source devices of the visible light source I and the visible light source II.
4. The high-speed chaotic secret communication device for visible light based on the visible light LED as claimed in claim 1, characterized in that: and erbium-doped fiber amplifiers are arranged in the feedback loop I and the feedback loop II to compensate the power lost in transmission.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621187885.1U CN206237408U (en) | 2016-11-04 | 2016-11-04 | A kind of high speed visible ray chaotic secret communication device based on visible LED |
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| CN201621187885.1U CN206237408U (en) | 2016-11-04 | 2016-11-04 | A kind of high speed visible ray chaotic secret communication device based on visible LED |
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| CN206237408U true CN206237408U (en) | 2017-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508665A (en) * | 2017-10-23 | 2017-12-22 | 南京大学 | A kind of high-dimensional chaotic laser light secret signalling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508665A (en) * | 2017-10-23 | 2017-12-22 | 南京大学 | A kind of high-dimensional chaotic laser light secret signalling |
| CN107508665B (en) * | 2017-10-23 | 2020-02-18 | 南京大学 | High-dimensional chaotic laser secret communication system |
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