基于指数分布假设的直接序列扩频系统抗窄带干扰技术研究  

Exponential Distribution-based Research on Narrowband Interference Suppression in DSSS Communication Systems

作　　者：张春海 高凯[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》2005年第1期73-77,共5页Journal of National University of Defense Technology

基　　金：国防科技重点实验室资助项目(2000JS63 3 1 KG0111)

摘　　要：在扩频信号加信道噪声近似服从高斯分布条件下,利用均匀DFT滤波器组性质,得到变换域谱线幅度平方服从指数分布的结论。通过假设检验方法,可对直接序列扩频系统接收信号中的窄带干扰进行检测和抑制。理论分析和数值仿真结果表明,算法能有效抑制常见的单音、多音干扰以及窄带高斯干扰。Under the condition that only the direct sequence spread spectrum signal and additive Gaussian noise are present at the receiver, the square of amplitude of received signal after DFT is assumed to be exponentially distributed. Based on this assumption, a novel narrowband interference detection and suppression algorithm is proposed. Theoretical analysis and simulation results demonstrate that the algorithm can suppress multi-tone jamming and narrowband Gaussian jamming efficiently.

关 键 词：直接序列扩频 抗干扰 指数分布 

分 类 号：TN914.42[电子电信—通信与信息系统]