雷达通信一体化多载波共享信号技术研究

Integration of Radar and Communication（Radcom） is one of important research areas for multi-functional Integrated Radio Frequency Systems(MFIRFS). Most attention are drawn for the Radcom system based on signal-sharing, due to its high integration degree. Based on multi-carrier signal processing, this proposed research is to aim the fundamental issues ,including the scheme of multi-carrier signal-sharing for radar and communication, the method of radar target echo detection based on signal-sharing and the approach to data modulation and its demodulation with signal-sharing as well as the Radcom system performance, and to solve some key technical problems, including the waveform and characteristics of multi-carrier shared signals, detection of radar target and the high-speed synchronization of burst instantaneous communication based on multi-carrier shared signals, and the suppression of the peak to average power ratio, on the basis of linear FM with quasi- orthogonal multi-carrier multiplexing and orthogonal frequency division multiplexing(OFDM).It is to find out the new way of Radcom, striving to lay the solid theoretical and technical foundations for the development of Radcom system.

雷达通信一体化是多功能综合射频系统的一个重要的研究方向，基于信号共享的雷达通信一体化系统因其一体化程度最高而备受关注。课题基于多载波信号处理理论，对雷达通信多载波共享信号方案、共享信号雷达目标回波检测方法、共享信号数据调制解调方法以及雷达通信一体化系统性能等方面的基础性问题进行研究，在准正交多载波复用线性调频技术和OFDM技术的基础上，解决多载波共享信号波形与特性、基于共享信号的雷达目标检测、基于共享信号的猝发瞬时通信高速同步、多载波信号峰均功率比抑制等关键性技术问题。探索解决雷达通信一体化系统的新途径，力求为我国一体化雷达数据链装备系统的发展奠定坚实的理论和技术基础。

雷达通信一体化是多功能综合射频系统的一个重要的研究方向，基于信号共享的雷达通信一体化实现了孔径和能量的共享，其一体化程度最高。本项目研究基于多载波共享信号的雷达通信一体化技术，就多载波共享信号的波形设计、共享信号数据调制与解调、目标检测与参数测量、猝发瞬时高速同步、峰均功率比抑制提出了针对性技术方法。提出了准正交多载波线性调频雷达通信一体化、直接扩频正交频分复用雷达通信一体化和完全互补码多载波正交频分复用雷达通信一体化技术理论，构建了较为完善的雷达通信一体化多载波共享信号体系。准正交多载波线性调频雷达通信一体化共享信号具有良好的雷达探测性能，同时可高效利用有限频谱实现高速率数据传输；直接扩频正交频分复用雷达通信一体化共享波形通过改进信号的相关性，有效提高了雷达目标探测性能，并且能实现可靠高速的信息数据传输；完全互补码多载波正交频分复用雷达通信一体化共享信号具有短周期、高主旁瓣比的特性，其码间分段互补特性有效的解决了近距离回波遮掩问题，提高了雷达探测性能，同时能满足多路高速数据传输的要求。项目设计研制了共享信号雷达通信一体化原理实验平台，实验验证了多载波共享信号雷达通信一体化系统目标探测与数据传输原理。