基于稀疏傅立叶变换的北斗接收机关键技术研究

项目名称： 基于稀疏傅立叶变换的北斗接收机关键技术研究

项目编号： No.61301089

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 韩航程

作者单位： 北京理工大学

项目金额： 24万元

中文摘要： 在以北斗系统为平台的天基链路中，飞行器的高动态特性和对抗下的复杂电磁干扰使得快速捕获技术和抗干扰技术成为了北斗接收机研究的重点。目前伪码并行捕获算法与干扰抑制算法均存在复杂度高、运算量大等问题，严重制约北斗系统在军用通信与导航方面的应用。频域并行捕获算法与变换域干扰抑制算法具有高度重合性，干扰信号与解扩后相关峰分别在频域和时域具有稀疏性。受上述两点启发，本课题将稀疏傅里叶变换应用于北斗接收机信号处理中，研究基于稀疏傅里叶变换的直扩系统抗干扰和捕获联合处理算法，利用稀疏傅里叶变换极低运算复杂度的特点，解决强干扰、高动态环境下北斗信号快速可靠接收的问题，为未来低复杂度、高性能北斗抗干扰接收机的研制进行前沿理论探索。

中文关键词： 稀疏傅里叶变换；快速捕获；干扰抑制；卫星导航；

英文摘要： In the Beidou space-based link, rapid capture technology and anti-jamming technology has become the focus of the Beidou receiver under the environment of complex electromagnetic interference which caused by high dynamic and confrontation of aircrafts. There exists problems such as high complexity and large amount of computation in the research of pseudo-code capture algorithm in parallel and suppression algorithm of interference, which seriously constraints the application of Beidou system in military communications and navigation.However, there exists a high degree of overlap between the two algorithms mentioned above while at the same time both the interference signal in time-domain and despreading peaks in frequency-domain are sparse. Inspired by the two points above, this topic will take advantage of the SFT in the Beidou receiver signal processing.Based on SFT, we will combine anti-jamming and capture together to study the signal processing of DS system. We will use the low computational complexity of SFT to realize the fast and reliable reception of Beidou signals under the environment of strong interference and high dynamic to explore cutting-edge theories for the future development of Beidou anti-jamming receiver with low-complexity and high-performance.

英文关键词： Sparse Fourier Transform；Fast Capture；Interference Suppression；Satellite navigation；