高超声速飞行器复杂电磁信道环境下测控通信适应性方法研究

To solve the challenges of real-time reliable TT&C and communication under the complex electromagnetic channel composed of plasma sheath and the hypersonic flight environments, this project studies the non-stationary deep fading, time- distortion characteristics of plasma sheath, as well as the synchronization property under the complicated coupling channel from the viewpoint of channel cancellation and rapid TT&C. For key scientific issues of real-time TT&C and reliable information transmission for hypersonic vehicles, Adaptation and elimination methods of complex TT&C electromagnetic channel would be proposed. Against the problem of non-stationary and deep fading of the plasma sheath channel, a spatial-polarization diversity adaptive transmission technology is proposed to improve the channel capacity. In view of the parasitic modulation effect and channel distortion caused by plasma sheath, a channel cancellation technique based on non-stationary channel state estimation is developed. In order to meet the real-time TT&C requirement under large dynamic Doppler environment, a novel nonlinear phase-locked tracking combined with parallel fast open-loop acquisition method is proposed. Key Technologies of adaptive space-polarization diversity transmission under non-stationary channel, non-stationary time-varying channel distortion cancellation, parallel open-loop fast capture and nonlinear phase lock structure optimization would be broken through. The feasibility of the proposed theories and methods are to be verified through establishing principle demonstration systems. The project would provide theoretical support and technical support for whole process reliable TT&C for hypersonic vehicles.

针对高超声速飞行器等离子体鞘套和高速飞行复杂电磁信道下实时可靠测控通信挑战，从对消传输信道影响和快速测控通信入手，研究等离子体鞘套信道非平稳深衰落时变特性、寄生调制信道畸变特性，以及耦合信道下同步特性，面向高速飞行实时测控、可靠信息传输关键科学问题，开展适应和对消复杂电磁信道影响的测控通信方法研究。针对等离子体鞘套信道非平稳及深衰落问题，开展提高接收信道容量的空间-极化分集自适应传输技术研究。针对等离子体鞘套信道寄生调制效应和信道畸变，开展基于非平稳信道预估的信道对消技术研究；针对高速飞行大动态多普勒下实时测控需求，开展基于并行开环快捕和大带宽非线性锁相跟踪联合的快速捕获跟踪方法研究；突破非平稳信道自适应空间-极化分集传输、非平稳时变信道畸变对消、并行开环快捕和非线性锁相结构参数优化等关键技术；建立原理演示系统验证理论的可行性，为飞行器全程测控通信提供理论支撑和技术保障。

高超声速飞行器的实时可靠测控通信受到复杂电磁信道环境的制约，面向大动态多普勒快速/实时测控和等离子体鞘套非平稳信道可靠信息传输关键科学问题，本项目从复杂电磁信道物理特性入手，明确了等离子体鞘套空域-极化域非平稳信道传输特性、大动态多普勒耦合等离子体鞘套寄生调制效应下测控同步特性，构建了高超声速飞行器复杂电磁信道模型；提出了复杂电磁信道环境下大动态多普勒快速/实时测控方法，提出了对消和适应恶劣复杂电磁信道影响的测控通信适应性方法；突破等离子体鞘套非平稳深衰落下信道容量提升、非平稳时变信道畸变对消、大动态多普勒快速捕获跟踪关键技术，为实现高超声速飞行器复杂电磁信道环境下实时可靠测控通信提供基础理论和关键技术支撑。. 本项目总计发表领域内高水平学术期刊论文28篇，其中SCI检索27篇，EI检索28篇，申请国家发明专利11项，已获授权专利3项；圆满的完成了预期研究成果目标。