基于零相关序列的精确同步方法及其在航空集群交感网络中的应用研究

Precise synchronization method based on Zero Correlation Zone (ZCZ) sequence under high-dynamic complex channel condition and the application of which in the communication and sensing netwoker of aviation swarm will be investigated, mainly include:(1)Study of synchronization method of swarm nodes under high-dynamic complex channel evironment. discrete presentation of correlation function under high-dynamic complex channel will be achieved and precise synchronization exploiting spread spectrum sequence and the phase-discrimination curve will be realized.(2)Point to point precise synchronization mehtod based on ZCZ sequence will be studied. ZCZ sequence will be introduced to achieve better correlation property and anti-multipath capability to reach synchronizaiton accuracy with fractional ratio sampling period.(3)Synchronizaiton for the whole network that meets the requirements of signal-level communication and sensing.Dynamic establishment of period and ZCZ of synchronizaiton sequence and synchronizaiton strategy of whole network will be investigated to obtain low-latency network synchronization for aviation swarm with large number of elements. The research of this project not only satisfies the demands of low-latency high-precise synchronizaiton of aviation swarm under high dynamic evironment but also could be applicable to civilian fields such as wireless sensor network, wireless positioning, coorperative communications, mobile communication, et al. which is the essential issue to insure the QOS of wireless communication network, accuracy of radar network and performance of positioning system and supplements indemnificatory for signal-level communication and sensing of aviation swarm, is theotically meaningful and practically valuble.

研究高动态复杂信道环境中基于零相关序列的精确同步方法及其在航空集群交感网络中的应用，主要包括：（1）研究高动态复杂信道环境中集群单元的同步方法。得到相关函数在高动态复杂环境下的离散域表达式，利用扩频序列相关函数和鉴相曲线特性实现精同步。（2）研究基于零相关序列的点对点的精确同步方法。引入零相关序列获得更好的相关特性及抗多径能力，获得分数倍采样周期分辨率的同步精度。（3）研究满足信号级交感的全网同步方法。研究同步序列周期长度及零相关区长度的动态设定方法以及全网同步策略，从而实现具有较大量元素的航空集群的低时延全网同步。.本项目研究成果不仅可以满足航空集群高动态条件下对低时延精同步的要求，而且可以用于无线传感器网络、无线定位、协同通信、移动通信等民用领域，是保障无线通信网络QoS、雷达组网精度、定位系统性能的重要内容，为航空集群交感网络实现信号级交感提供保障，具有重要的理论意义和现实价值。

不依赖于卫星导航的定位、导航和授时（PNT）技术是现代信息化装备在高威胁环境下进行作战的关键技术，航空集群为了实现编队保持及任务协同高度依赖于PNT。基于ZCZ的精确同步方法通过在物理层的同步序列、同步方法的联合设计，并开发一种专用的适合同步信息快速分发的网络协议，可实现航空集群全网快速自同步。鉴于全网同步不仅涉及物理层还需要网络层的协同优化，本项目从伪码同步的基本原理、ZCZ序列构造、单节点高精度同步方法、全网同步序列分发协议等方面开展研究。从航空集群交感网络框架出发，研究了单节点同步信息处理、全网同步信息分发与迭代优化方法，建立基于ZCZ序列的精同步实现模型、全网同步优化模型、全网同步信息分发协议，形成了一系列创新性成果，包括：基于交织的零相关区同步序列构造、基于鉴相曲线拟合的节点间同步方法、全网精确同步实现框架、基于MCPS的低时延网络协议等。共发表学术论文10篇，其中在soft computing、Wireless Personal Communications等国际学术期刊上发表SCI论文2篇；在IEEE 3rd International Conference on Information Science and Control 、系统工程与电子技术、电子与信息学报等国际会议与EI源期刊中发表论文7篇；国内核心期刊发表论文1篇。本项目的研究，探索了一种航空集群多节点协同自同步方法，可为未来高威胁环境下航空集群不依赖于卫星导航的分布式作战应用提供支撑。