基于多维域稀疏表征的卫星导航干扰抑制技术

This project is based on the background of a new system and a multi-system global satellite navigation system in the multi-dimensional complex electromagnetic interference environment. The research of satellite navigation interference suppression technology based on sparse representation in multi-dimensional domain is carried out.Sparse characteristics of navigation jamming signals are fully exploited in the polarization-space-time-frequency multidimensional domain distribution characteristics.On this basis, a new method of interference signal detection and suppression is proposed.Explore new concepts of navigation anti-jamming processing, master new principles, and put forward effective new criteria, new methods and new algorithms for handling navigation anti-jamming.Key scientific issues to be addressed include the performance degradation of multi-dimensional sparse jamming suppression under the condition of new system satellite navigation signals.Decreased performance for coherent and agile interference suppression.The freedom of suppression of composite interference signal is limited under the condition of finite number of array elements.Innovative research results have been achieved in suppress the interference signal of complex navigation based on sparse representation in time-frequency domain.Navigation Anti-jamming Signal Based on Sparse Representation in Sparse Array Antenna. the suppression of complex navigation jamming signals based on sparse polarization sensitive arrays with finite array elements.Improve the anti-suppression interference performance of China's satellite navigation system receivers, so that China's new system navigation system with strong anti-interference ability in the future has key technical support.

本项目拟以多维度复合电磁干扰环境下新体制、多系统全球卫星导航系统为背景，开展基于多维域稀疏表征的卫星导航干扰抑制技术研究，在极化-空-时-频多维域分布特性上充分挖掘导航干扰信号的稀疏特性，并在此基础上提出了新的干扰信号检测与抑制方法，探索导航抗干扰处理新概念，掌握新原理，提出有效的处理新准则、新方法、新算法。拟解决的关键科学问题包括新体制卫星导航信号条件下对多维复合稀疏干扰抑制性能下降、对相干及捷变式干扰抑制性能下降、阵元个数有限条件下复合干扰信号抑制的自由度受限等关键科学问题。力求在基于时频域稀疏表征的复合导航干扰信号抑制、稀疏阵列天线条件下基于空域稀疏表征的导航抗干扰信号、有限阵元条件下基于稀疏极化敏感阵列的复合导航干扰信号抑制等方面取得创新性研究成果，提升我国卫星导航系统接收机的抗压制式干扰性能，使我国未来具备强抗干扰能力的新体制导航系统具备关键技术支撑。

本项目以多维度复合电磁干扰环境下新体制、多系统全球卫星导航系统为背景，开展基于多维域稀疏表征的卫星导航干扰抑制技术研究，在极化-空-时-频多维域分布特性上充分挖掘导航干扰信号的稀疏特性，并在此基础上提出了新的干扰信号检测与抑制方法，探索导航抗干扰处理新概念，掌握新原理，提出有效的处理新准则、新方法、新算法。解决的关键科学问题包括新体制卫星导航信号条件下对多维复合稀疏干扰抑制性能下降问题、对相干及捷变式干扰抑制性能下降问题以及阵元个数有限条件下复合干扰信号抑制的自由度受限问题。力求在基于时频域稀疏表征的复合导航干扰信号抑制技术、稀疏阵列天线条件下基于空域稀疏表征的导航抗干扰信号技术、有限阵元条件下基于稀疏极化敏感阵列的复合导航干扰信号抑制技术等方面取得创新性研究成果，提升卫星导航系统接收机的抗压制式干扰性能。项目总体执行情况较好，圆满完成了预期研究内容，完成了预期目标。