数字化扩频接收机的自适应抗干扰滤波方案研究  

Study of Adaptive Anti-jamming Filtering Schemes for DS-MSK Digitalized Receiver

作　　者：卢树军[1] 王世练[1] 张尔扬[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2006年第4期93-98,共6页Journal of National University of Defense Technology

基　　金：国防科技重点实验室基金资助项目(2000JS63.3.1KG0111)

摘　　要：讨论了自适应抗干扰滤波在最小频移键控的直接序列扩频(DS-MSK)数字化接收机中的应用问题,对非线性滤波加以改进,提出了部分解扩非线性滤波(PDNF)结构,将快速更新子带自适应滤波(FRSAF)算法用于PDNF结构以提高收敛速度。结合FRSAF算法的PDNF自适应抗干扰滤波方案在收敛速度、稳健性和输出信噪比等方面明显优于结合LMS算法的传统非线性抗干扰滤波方案,仿真结果验证了上述结论。The application of adaptive anti-jamming filtering in DS-MSK digitanlized receiver is discussed in this paper. A novel structure named partly despread nonlinear filtering （PDNF） is proposed. It is developed from classic nonlinear ftltering （NF）. Fast refreshed subband adaptive filtering （FRSAF） algorithm is applied to PDNF structure to speed up convergence rate. This novel adaptive anti-jamming filtering scheme composed of PDNF structure and FRSAF algorithm outperforms the classic scheme composed of NF structure and LMS algorithm on convergence rate, robustness and output SINR. Simulation results demonstrated the efficacy of the novel scheme.

关 键 词：直接序列扩频 最小频移键控 数字化接收机 窄带干扰抑制 子带自适应滤波 快速更新 

分 类 号：TN973.3[电子电信—信号与信息处理]