Dual-precision chaotic signal generator based on FPGA (field programmable gate array)

Abstract

The invention provides a dual-precision chaotic signal generator based on an FPGA (field programmable gate array). Two parallel computing branch circuits are adopted to finish operation of three-way signals, wherein one branch circuit finishes the operation of two-way signals in a time-phased working way, and the other branch circuit finishes the operation of the other way signal; the signal generator comprises a time sequence control unit, a data selection unit, a data storage unit and two floating point quantity computing units; the two floating point quantity computing units are formed into two parallel computing branch circuits; the signal generator provides state control signals for a unit module; each floating point quantity computing unit is provided with a data distribution unit, a floating point quantity adder, a floating point quantity multiplier and a memory unit with data distribution functions. According to the dual-precision chaotic signal generator provided by the invention, the use areas of chips can be greatly reduced, and meanwhile, the working efficiency can be improved prominently.

Description

technical field [0001] The present invention relates to the field of high-precision digital signal processing and digital image encryption, specifically a Lorenz double-scroll chaotic signal with double-precision floating-point numbers conforming to the IEEE-754 standard and designed by using a field programmable gate array (FPGA) generator. Background technique [0002] Information security technology is a comprehensive subject, which involves information theory, computer science, cryptography and mathematics, and its main task is to study information protection methods in computer systems and communication networks to achieve the security of information exchange within the system , confidentiality, truth and completeness. One of its core issues is actually the theory of cryptography, and cryptography has become a difficult and hot topic in information security. Cryptography can be said to be a relatively old subject with young blood. It was used for the exchange of c...

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Problems solved by technology

[0016] This method of using FPGA technology to design a chaotic signal generator can solve the timing control problem very well and clear the obstacles for the application of chaotic synchronization. However, this method takes up a lot of FPGA logic resources, which makes it useless in a limited chip area. It is impossible to integrate more functions, which limits the scope of application of the design and increases the cost of actual engineering applications

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