摘要
窄带干扰(NBI,Narrow-Band Interference)作为一类常见的共道干扰对扩频系统的影响不容忽视,虽然扩频系统本身具备一定的NBI对抗能力,但有效的NBI抑制技术可以显著提高系统性能.在过去的30年中,扩频系统NBI抑制技术的关注重心由单用户直扩(DSSS,Direct Sequence Spread Spectrum)系统扩展到多用户码分多址(CDMA,Code-Division Multiple-Access)系统.文章从预测技术、变换域技术、码辅助技术的角度对DSSS和CDMA系统NBI抑制技术的研究现状、分类比较以及发展趋势进行了全面概述.
As a common co-channel interference overlapping on spread spectrum,the effect of Narrow-Band Interference（NBI）could not be neglectable.Although spread spectrum systems could suppress NBI themselves to a certain extent,the effective rejection techniques used for NBI suppression would enhance the performance greatly.Over the past 30 years,the focus of NBI suppression has shifted from the single-user Direct Sequence Spread Spectrum（DSSS）systems to the multi-user Code-Division Multiple-Access（CDMA）systems.From the aspects of prediction,transform domain and Code-Aided techniques,this paper provides tutorial overview of current status,category comparison and development trend on NBI suppression of DSSS and CDMA systems.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2009年第10期2248-2257,共10页
Acta Electronica Sinica
基金
高等学校博士学科点专项科研基金(No.20050217006)
