正交频分复用接收机中等强度密集测距仪脉冲干扰抑制的研究

项目名称： 正交频分复用接收机中等强度密集测距仪脉冲干扰抑制的研究

项目编号： No.U1233117

项目类型： 联合基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 张学军

作者单位： 北京航空航天大学

项目金额： 40万元

中文摘要： 为解决宽带航空数据链系统以内嵌方式配置于L频段，并与L频段测距仪系统共存,而带来测距仪发射机对正交频分复用接收机中等强度密集脉冲干扰问题，本基金利用测距仪信号与OFDM信号统计独立的特性，以独立分量分析理论为基础，研究基于盲信号分离的测距仪脉冲干扰抑制方法；利用测距仪脉冲信号块稀疏的特性，以压缩感知信号重构理论为基础,研究基于压缩感知的测距仪脉冲干扰抑制方法；利用测距仪发射脉冲波形先验信息已知的特性，以小波变换理论为基础，研究基于小波变换的测距仪脉冲干扰抑制方法，最后以USRP软件无线电为基础设计实现正交频分复用脉冲干扰抑制试验系统，并利用该系统验证测试所提出脉冲干扰抑制方法的性能；通过本基金的研究解决宽带航空数据链正交频分复用接收机被中等强度密集测距仪脉冲干扰的问题，为宽带航空数据链以内嵌方式部署在航空无线电导航频段奠定理论与技术基础。

中文关键词： 宽带航空数据链；压缩感知；小波变换；盲信号分离；空域滤波

英文摘要： The Broadband Aeronautical Data Link System is deployed in the L-band in inlay mode, and the system coexists with DME system. In a result, it is inevitable to bring about the problem that the OFDM receiver suffers the interference from intensive impulse interference of DME transmitter. In order to cope with the problem, the research group plans to carry out the research in four aspects. First, based on the statistically independent characteristic of the DME and the OFDM signals, the Independent Component Analysis (ICA) theory is utilized to suppress the DME impulse interference. Second, based on the block sparse characteristic of DME signals, the Compressed Sensing (CS) theory is used to suppress the DME impulse interference to the OFDM receiver. Third, based on the characteristic that the impulse waveform of the DME transmitter is known by the OFDM receiver, the wavelet transform theory is employed to suppress the DME impulse interference to the OFDM receiver. Finally, a test system of suppressing the impulse interference is established with the USRP software radio hardware. Based on the test system,　the interference suppression performance of the proposed algorithms is evaluated. The research lays the foundation for the Broadband Aeronautical Data Link System being deployed in the aeronautical radio navigation

英文关键词： The Broadband Aeronautical Data Link System；the compressed sensing theory；the wavelet transform denoising；independent component analysis theory；spatial filter of array antenna