频谱共存环境下组网OFDM雷达射频隐身辐射参数优化研究

Due to the exponential increase in the number of radars and wireless communication devices and the services with high bandwidth requirements in modern battlefield, the radio frequency stealth technology for radar networks has become a very challenging problem. There is an urgent demand to develop new methods for the problem of radio frequency stealth optimization with multiple contraints for radar networks in spectral coexistence environment. This project focuses on the problem of radio frequency stealth based radiation parameters optimization for OFDM radar networks in spectral coexistence environment, whose purpose is to minimize the radiation energy of the radar system while guaranteeing the specified target detection/tracking performance and the communication system performance requirements. The main contents include: (1) The radio frequency stealth based radar waveform design method in OFDM radar networks is studied for the problem of single target detection/tracking in spectral coexistence environment; (2) The joint transmitter selection and radio frequency stealth based radar waveform design method in OFDM radar networks is studied for the problem of multiple target detection/tracking in spectral coexistence environment; (3) The hierarchical game theory based radiation power control method in OFDM radar networks is studied for the dynamic interaction between radar networks and communication systems in spectral coexistence environment. It will provide basic theory and important technical support for the implementation and application of the radio frequency stealth technology in radar networks.

当今战场中雷达、通信等射频装备数量的急剧增加和带宽的日益扩展，对组网雷达传统射频隐身技术提出了新的挑战，迫切需要解决频谱共存环境下组网雷达的射频隐身多约束优化问题。本项目在组网OFDM雷达与通信系统频谱共存环境下，以最小化雷达辐射能量为核心，以满足目标探测跟踪性能及通信任务需求为约束，围绕组网OFDM雷达射频隐身辐射参数优化开展理论研究，主要内容包括：（1）针对频谱共存环境下单目标探测跟踪问题，研究组网OFDM雷达射频隐身波形优化方法；（2）针对频谱共存环境下多目标探测跟踪问题，研究组网OFDM雷达发射机选择与射频隐身波形联合优化方法；（3）针对频谱共存环境下组网雷达与通信系统的动态交互，研究基于分层博弈的组网OFDM雷达辐射功率控制方法。研究成果可为频谱共存环境下组网OFDM雷达射频隐身技术的实现与应用提供基础理论和关键技术支撑。

该项目以组网OFDM雷达系统为平台、射频隐身辐射参数优化为导向、目标探测跟踪性能及通信系统任务需求为约束，通过理论分析、数学建模和仿真实验，探明了雷达系统辐射参数与目标探测跟踪性能、通信任务需求之间的函数关系，分析了雷达辐射参数的分配策略对目标探测跟踪性能和通信任务需求的影响，建立了雷达辐射参数控制与目标探测跟踪、通信之间的数学优化模型；在此基础上，重点突破了目标探测跟踪性能与组网雷达射频隐身性能在线评估、射频辐射参数优化设计建模以及多约束多耦合优化模型的低复杂度求解等诸多难点，解决了匹配目标特性的组网OFDM雷达射频隐身辐射参数设计与频谱共存环境下组网OFDM雷达与通信系统的动态交互等关键科学问题，提出了一系列频谱共存环境下组网OFDM雷达系统辐射参数优化设计新方法，在满足目标探测跟踪性能及通信任务需求的条件下，最大限度地降低了组网OFDM雷达的总辐射能量，有效提高了系统射频隐身性能，为复杂环境下组网雷达射频隐身技术的发展提供了基础理论和关键技术支撑。