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A Chaotic Spread Spectrum Secure Communication System Based on Quadrature Amplitude Modulation

A quadrature amplitude modulation and secure communication technology, applied in the field of information security, can solve problems such as performance and bit error rate defects, and achieve the effects of fast transmission rate, strong anti-interception ability, and wide frequency bandwidth

Active Publication Date: 2022-04-19
深圳立专技术转移中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patented technical solution has defects in performance, bit error rate, etc.

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  • A Chaotic Spread Spectrum Secure Communication System Based on Quadrature Amplitude Modulation
  • A Chaotic Spread Spectrum Secure Communication System Based on Quadrature Amplitude Modulation
  • A Chaotic Spread Spectrum Secure Communication System Based on Quadrature Amplitude Modulation

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Embodiment Construction

[0025] In order to illustrate the embodiments of the present invention more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0026] Such as figure 1 As shown, the embodiment of the present invention is based on the quadrature amplitude modulation chaotic spread spectrum security communication system, including a mirror 1, a first chaotic laser 2-1, a second chaotic laser 2-2, a third chaotic laser 2-3, and a first chaotic laser 2-3. One power divider 3-1, the second power divider 3-2, the first multiplier 4-1, the second multiplier 4-2, the third multiplier 4-3, the fourth multiplier 4-4, the first multiplier Five multipliers 4-5, sixth multipli...

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Abstract

The present invention is based on the chaos spread spectrum safety communication system of quadrature amplitude modulation, the reflector is connected with the chaos laser, and the chaos laser drives the second and third chaos lasers into a synchronous state; the transmitting end converts the optical chaos signal into an electrical signal, which is divided into two channels Use two multipliers to multiply the two signals, respectively use two multipliers to multiply the signals cos(ωt) and sin(ωt), and add the two signals. After the continuous laser generates continuous light waves, use the phase modulator to modulate the signal to the light wave generated by the continuous laser; the receiving end uses the Mach-Zehnder interferometer to convert the light wave signal into intensity modulation, divides the light signal into two paths, passes through the third and fourth photodetectors respectively, and uses the fifth and sixth multipliers, Multiplied with two orthogonal sine and cosine signals respectively to obtain two encrypted chaotic sequences; at the receiving end, the third chaotic laser generates a synchronous chaotic sequence, turns it into an electrical signal, separates two paths, and receives Conduct cross-correlation calculations on electrical chaotic signals to restore transmission information.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a chaos spread spectrum security communication system based on quadrature amplitude modulation. Background technique [0002] Chinese Patent No. 2017100102390 discloses a laser chaotic spread spectrum conversion system with time delay hiding characteristics. The chaotic optical signal generated by the external cavity semiconductor laser is spread through the time lens composed of photoelectric phase modulators PM1, PM2 and high dispersion medium. Specifically, on the basis of time-frequency conversion by time-domain Fourier transform, the chaotic spectrum broadening is realized by increasing the amount of dispersion, and the relationship between the driving signal period and the feedback delay time of the chaotic laser is realized by adjusting the relationship between the driving signal period and the chaotic laser feedback delay time. The time-delay labe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/69H04B10/50H04B10/54H04B10/548H04L9/00H04L9/12
CPCH04B10/503H04B10/548H04B10/54H04L9/001H04L9/12H04B1/69
Inventor 李齐良奚小虎林郎胡淼唐向宏曾然
Owner 深圳立专技术转移中心有限公司
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