摘要
OFDM-CDMA系统中,在多径传播和其他同频干扰存在时,接收机会收到多个恒模信号,针对这种情况,文章提出一种基于线性约束恒模算法(LCCMA)的盲抗干扰方法,该方法结合了通常的旁瓣消除器和恒模算法,用于消除多址干扰对系统的影响。分别对不同用户数目的系统进行计算机仿真,结果表明,采用本算法后,能有效地抑制多址干扰,极大地提高了系统的性能。
For the reason of multi-path propagation and the same frequency interference signals,some constant modulus signals are received in OFDM-CDMA communication system.A blind interference cancellation scheme based on LCCMA is proposed in this thesis.This method combines generalized sidelobe canceller with constant modulus algorithm and it is used for mitigating the effect of multiple access interference.Simulation is performed for different number of users,and results show that this algorithm can efficiently suppress multiple access interference and improve system performance.
出处
《计算机工程与应用》
CSCD
北大核心
2003年第21期39-41,128,共4页
Computer Engineering and Applications
基金
国家自然科学基金资助项目(编号:60172018)
关键词
正交频分多路
码分多址
线性约束恒模算法
干扰抑制器
多址干扰
OFDM,CDMA,Linearly constrained constant modulus algorithm,interference suppressor,multiple access in-terference
