雷达通信混叠信号单通道盲分离新理论与方法

This program focuses on the novel theories and methods of single channel blind signal separation (SCBSS) under complex electromagnetic environment (CEE). This plays an important role to improve the system performance of Radar, Communication, Navigation, EW, etc. And it has promising application foreground in cooperative and non-cooperative signal processing area.. Some new single channel blind signal separation theories and methods will be present by exploiting the differences among the radio emitters such as cyclostationarity and modulation property, utilizing match filtering technology in cyclostationary domain, Independent Component Analysis (ICA), and so on. SCBSS can extract signals-of-interest (SOIs) or valuable sources from multiple mixed signals, which will lay the foundation for subsequent radio source information extraction.. The applicant has long been engaged in areas such as non-cooperate communication, which involves significant security and national defense scientific research system development work. The research focuses on the bottleneck of separation of multi radiations in complex electromagnetic environment, which is of great academic value and strategic significance in aerospace electronic reconnaissance domain..

项目主要研究复杂电磁环境下单通道盲信号分离新理论与新方法。对于提高雷达、通信、导航、电子对抗等系统性能具有重要作用，在合作/非合作信号处理领域具有广阔的应用前景。. 项目拟通过充分利用雷达、通信等电磁辐射源信号在循环频域、调制域的差异性，借助循环频域最优滤波、独立分量分析等理论，提出单通道盲信号分离新理论与方法，从混叠信号中分离出感兴趣或者具有重大价值的电磁辐射源信号。. 申请人一直从事非合作通信这个涉及国防重大安全的科学研究与型号装备的研制工作，拟开展的研究工作将力争解决航天侦察技术领域对混叠信号处理这个瓶颈问题，具有重大的学术价值及战略意义。

本课题按照自然科学基金的要求，以高度的责任感和工作热情，团结协作、共同攻关，较为圆满地完成了合同规定的各项研究任务，达到了预期研究目标。对作为经典单通道盲源分离技术核心的循环频域滤波器进行了改进，提出了一种新的校正算法。仿真表明，与前人算法相比，新算法在校正精度、运算复杂度及鲁棒性等方面具有明显优势。提出了一种基于单多通道转换的单通道盲源分离算法。基于雷达通信信号特性，提出了时域线性阵列概念，实现了伪多通道观测的构建，结合多通道盲源分离方法，完成了单通道盲源分离。仿真验证了所提新算法在分离时频混叠雷达通信信号方面的有效性。针对星基AIS混叠信号分离，引入了PSP算法。通过频率补偿，提升了PSP算法对不同频差混叠信号的适应能力。基于GMSK信号恒模特性，提出了一种恒模约束下的星基AIS单通道分离算法。仿真试验表明，改进后的算法具有更快的收敛速率，在一定程度上消除了位连带错误，使分离性能得到显著提升。.在研究基础上发表论文5篇，其中SCI/EI收录3篇；撰写学术专著1部；申请国家发明专利1项。完成考核指标。