Three-dimensional OFDM Constellation Encryption Scheme Based on Perturbed Spatiotemporal Chaos
The swift evolution of wireless communication networks has resulted in a substantial surge in transmitted information,thus imposing greater demands on system transmission efficiency and communication security.In order to fulfill these require-ments,this paper proposes a 3D OFDM constellation encryption scheme based on perturbed spatiotemporal chaos.Initially,a feed-back elementary cellular automaton is devised to enhance the elementary cellular automaton's periodicity and pseudo-random-ness.The iterative outcomes of the feedback elementary cellular automaton are normalized and integrated into the spatiotemporal chaos system as a perturbation.It is verified that the system,after incorporating the perturbation,exhibits excellent chaotic pro-perties through bifurcation diagrams,Lyapunov exponents,regression mapping analysis,and randomness tests.Next,a novel three-dimensional 16-ary constellation map is developed to expand the minimum Euclidean distance between constellation points by 6.3％,and the perturbed spatiotemporal chaotic system is combined with the physical layer modulation encryption of the three-dimensional constellation rotation.Experimental simulation outcomes indicate that the proposed algorithm's bit error rate performance is enhanced by roughly 1 dB compared to other 3D 16-ary constellation mapping rotation encryption algorithms.Mo-reover,security analyses of key space,key sensitivity,and statistical attack prove the superior security performance of the pro-posed scheme.
万方数据
维普
