非平稳信道下的鲁棒数据链优化设计综述——带限环境下的混沌传输系统

近年来，以物联网(IoT)为基础的6G的相关技术研究引起了研究单位、高校和工业界的广泛关注，其中还有一些重要的问题亟待解决。如何以较低的成本保证带限非平稳环境下数据传输的鲁棒性是一个非常重要的问题。该文介绍了一种低复杂度、低功耗的调制解调传输技术，即差分混沌键控(DCSK)调制。该文将分别描述和分析该系统在标准和非标准传输环境下的特性、优势及其改进方法。同时将提供一些基于多元DCSK(MDCSK)的新型编码调制方案来提高系统在带限环境下的传输质量，这将有助于在低功耗、低成本的网络上，特别是在非平稳信道上提升系统的鲁棒性。结果表明这些优化工作显著地改善了系统性能。之后针对非平稳信道特性系统参数的优化与自适应传输机制将成为未来研究的热点。

Survey of Optimization Design for Robust Data Link over Non-stationary Channels-chaotic Transmission Systems over Band-limited Environments

Recently 6G based on Internet of Things (IoT) is attracted much attention from research units, universities and industries. There are some important problems leaved for us to resolve. One of the most important problems is how to keep robust transmitting through band-limited non-stationary channels with low cost. In this overview, one low complexity, low power consumption modulation and demodulation transmitting technique, namely, Differential Chaos Shift Keying (DCSK) with its modified ways, is introduced in wireless and wired transmission environment. Their properties and advantages of the models under traditional and non-standard transmission environments are described and analyzed. Meanwhile some new coded M-ary Differential Chaos Shift Keying (MDCSK) schemes to enhance their quality of the system transmitting over band-limited transmission environments are provided, which are beneficial to improve the robust transmitting over networks with low power consumption and low cost, particularly, over non-stationary channels. The results show that the optimization work improves the system performance significantly. After that, the optimization and adaptive mechanics of the system parameters for the non-stationary channel characteristics will become a future research hotspot.