双模三维索引调制差分混沌移位键控系统的设计及性能分析OA北大核心CSTPCD

Given the issues of low transmission rate and poor bit error performance in traditional differential chaos shift keying systems,a dual-mode three-dimensional index modulation differential chaos shift keying(DMTD-IM-DCSK)sys-tem was proposed.This system simultaneously utilized time slots,orthogonal codes,and sort index to transmit informa-tion on both selected and unselected time slots.At the receiver,the variance of noise was reduced and the system's error performance was improved by the use of denoising techniques.Formulas for bit error rate(BER)were derived for addi-tive white Gaussian noise channels and multipath Rayleigh fading channels.Simulation results demonstrate that,com-pared to similar chaotic keying systems,the proposed system achieves higher data rates and superior error performance.