An analog-digital hybrid electro-optical chaotic signal synchronous generator

Abstract

The invention discloses an analog-to-digital hybrid electro-optical chaotic signal device and method. The device comprises a digital-to-analog conversion module, an analog nonlinear conversion module,an analog-to-digital conversion module, a digital nonlinear conversion module and a clock control module. A chaotic signal is generated based on an analog-digital hybrid delay feedback electro-optical system, the bandwidth and complexity of the signal are improved through analog nonlinear transformation and digital nonlinear transformation, the delay characteristic of the signal is eliminated, and the safety of the system is guaranteed; based on the proposed signal generation device, a signal regeneration method is designed and used for regenerating chaotic signals highly related to originalsignals at different positions, so that the reproducibility of the chaotic signals is ensured; therefore, the problems of poor safety and poor reproducibility of chaotic signals are solved at the sametime.

Description

technical field [0001] The invention belongs to the technical field of safety communication, and more specifically relates to a synchronous generating device of an analog-digital hybrid electro-optical chaotic signal. Background technique [0002] As the application of optical communication becomes more and more common, the security issues in optical communication become more and more important. The security optical communication system based on chaos has become a research hotspot. On the one hand, as an important basic part for ensuring security, the system puts forward strict requirements on the performance of the chaotic signal generator. There are two main methods for generating optical chaotic signals. The first one is to use the direct nonlinear coupling of the two state variables of the laser internal field strength and carrier concentration in the rate equation of the laser generation process to generate chaotic output. The second is to generate optical chaotic sign...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide an analog-digital hybrid electro-optic chaotic signal synchronous generator, aiming at solving the problem that the existing security optical communication system usually adopts delayed feedback to keep the chaotic signal secret. The problem that the security of chaotic signal is easily threatened by key parameters

Images