【作者】 李琳； 路军； 张尔扬；

【Author】 Lilin Lujun Zhang Er-yang (Institute of Electronic Science & Engineering,NUDT,changsha 410073,China)

【机构】 国防科技大学电子科学与工程学院；

【摘要】 本文从窗函数角度阐明调制型重叠变换(MLT)在频谱泄漏水平、频率分辨率方面优于离散傅立叶变换(DFT)。然后研究了MLT干扰抑制器对直接序列扩频(DSSS)中两类平稳窄带干扰(NBI)——高斯窄带干扰和单音干扰的抑制性能。理论分析与仿真结果表明MLT干扰抑制器能更有效地抑制平稳窄带干扰,显著改善DSSS系统性能。更多还原

【Abstract】 The modulated lapped transform(MLT) can be viewed as discrete Fourier transform(DFT) with special window function in time domain.This paper,in point of window function,analyzes that MLT has advantage over DFT in the level of spectral leakage and frequency resolution,and then analyzes the performance of the DFT interference exciser and the MLT interference exciser to excise two kinds of stationary narrowband interference(NBI),that is,Gaussian narrowband interference and single-tone interference in direct sequence spread spectrum(DSSS) system.The analytic conclusions and simulation result show that the MLT interference exciser is better than the DFT interference exciser in excising NBI in DSSS system.更多还原