差分混沌通信研究综述:信号设计与性能优化

作为一种低复杂度的非相干信息传输方案，差分混沌通信系统以其良好的抗多径衰落性能而受到广泛关注。近年来，研究者围绕着以差分混沌移位键控(DCSK)为代表的差分混沌通信开展了一系列富有成效的研究，逐渐发展了差分混沌通信的信号设计与性能优化方法。为此，该文从信号帧结构设计、正交多级信号设计、信号星座图设计和多载波信号设计4个层面详细综述了差分混沌通信信号设计的主要研究进展。此外，该文重点总结了面向差分混沌通信的噪声抑制辅助性能优化、索引调制辅助性能优化和混沌成形滤波辅助性能优化等方面的研究工作。

Survey of Differential Chaotic Communications: Signal Design and Performance Optimization

As a kind of low-complexity and non-coherent information transmission schemes, the differential chaotic communication system has been widely studied because of its good performance against multipath fading. Recently, a series of fruitful researches on Differential Chaos Shift Keying (DCSK) have been carried out, and the signal design and performance optimization for differential chaotic communications have also been developed. Therefore, the main research progresses in signal design of differential chaotic communications are surveyed in detail in the paper from the following four perspectives: design of signal frames, design of orthogonal multilevel signals, design of constellation diagrams and design of multicarrier signals. In addition, the research works on noise suppression aided performance optimization, index modulation aided performance optimization and chaotic shape forming aided performance optimization for differential chaotic communications are summarized in the paper.