基于平方根升余弦分频的混沌脉冲整形滤波器

Chaotic Pulse-Shaping Filter Based on Root-Raised-Cosine Division.

作者信息

Tian Xiaosi, Wang Zulin, Huang Qin

机构信息

School of Electronic and Information Engineering, Beihang University, Beijing 100191, China.

出版信息

Entropy (Basel). 2023 Jan 10;25(1):136. doi: 10.3390/e25010136.

DOI:10.3390/e25010136

PMID:36673277

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9858495/

Abstract

Chaotic baseband wireless communication system (CBWCS) suffers bit error rate (BER) degradation due to their intrinsic intersymbol interference (ISI). To this end, an ISI-free chaotic filter based on root-raised-cosine (RRC) division is constructed to generate a chaotic signal. A wireless communication system using this chaotic signal as a baseband waveform is proposed. The chaotic property is proved by the corresponding new hybrid dynamical system with topological conjugation to symbolic sequences and a positive Lyapunov exponent. Simulation results show that under a single-path channel and multi-path channel, the proposed method outperforms CBWCS in both BER performance and computational complexity.

摘要

混沌基带无线通信系统（CBWCS）由于其固有的码间干扰（ISI）而导致误码率（BER）下降。为此，构建了一种基于根升余弦（RRC）分频的无ISI混沌滤波器来生成混沌信号。提出了一种使用该混沌信号作为基带波形的无线通信系统。通过与符号序列拓扑共轭且具有正Lyapunov指数的相应新混合动态系统证明了其混沌特性。仿真结果表明，在单径信道和多径信道下，所提方法在误码率性能和计算复杂度方面均优于CBWCS。