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.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
直接序列扩频
抗干扰
指数分布
direct sequence spread system
interference suppression
exponential distribution
