正交信号编码调制理论及其在跳频抗干扰通信中的应用研究

项目名称： 正交信号编码调制理论及其在跳频抗干扰通信中的应用研究

项目编号： No.61301078

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 周志强

作者单位： 清华大学

项目金额： 24万元

中文摘要： 正交信号调制（如MFSK、PPM）通过选择信号空间中某一正交基信号来传输信息，其频谱效率随正交基维度的增加而急剧下降。本项目突破传统正交信号调制单一信号选取的制约，提出了一种选取若干稀疏基信号传输信息的方法，将一维调制信号拓展至多维信号，利用多维调制扩展了调制信号集，并与编码进行联合设计，使其在不增加带宽的条件下，提升系统性能。本项目旨在拓展正交信号的编码调制理论，并以此为支撑，研究该理论在跳频抗干扰系统中的应用，提出了多频跳频抗干扰通信新体制，相对于原有的PN序列跳频、差分跳频以及信息驱动跳频等单频跳变通信方式，增强了系统抗干扰的鲁棒性，提高了系统设计的灵活性，充分获取了系统频率分集，并在改善系统频谱利用率方面极具发展潜力。本项目的开展为编码调制理论开拓了新方向，同时从多维信号设计的角度为抗干扰通信开辟新视角。

中文关键词： 信号维度；香农限；多维跳频；空间调制；抗干扰

英文摘要： Orthogonal modulation such as MFSK and PPM transmits signal based on selecting a set of orthogonal basis in signal space, the spectral efficiency of which decreases rapidly with the increase of the basis dimension. This project breaks the limitation that the modulation space of orthogonal signals is confined to one dimension and proposes a signal transmit method based on sparse basis to expand one dimensional signal to multi-dimension. In multi-dimensional signal space, the modulation order can be increased. If the modulation and coding are jointly designed, the system performance can be improved within the same system bandwidth. This project is aimed to explore the coded modulation theory of orthogonal signals and study the application of this theory in frequency hopping anti-jamming system. In this situation, a novel anti-jamming method named multiple frequencies frequency hopping (MF-FH) is proposed. Compared to traditional PN sequence frequency hopping, differential frequency and message driven frequency hopping, MF-FH enhances the robustness and design flexibility of the system, achieves the frequency diversity and has great potential for improving the spectrum efficiency. The implementation of this project will explore a new direction of coded modulation theory and open up a new perspective for anti-jammin

英文关键词： anti-jamming；multidimensional frequency hopping；Shannon theory；spatial modulation； signal dimension