摘要
针对异步CDMA系统盲多用户检测误码率较高的问题,通过分析Unscented粒子滤波与异步CDMA系统特点,提出了在该背景下的基于Unscented粒子滤波盲多用户检测方法,在平坦瑞利衰减信道下进行仿真。结果表明Unscented粒子滤波与传统粒子滤波检测方法相比具有更高的检测精度,在用户数量增多以及干扰用户能量发生变化时仍能保持较好的检测精度,具有很强的检测稳定性和抗干扰能力。
Aiming at the problem of high bit error rate in blind multi-user detection in asynchronous CDMA system,according to the characteristics of unscented particle filter and asynchronous CDMA,blind multi-user detection methods are proposed based on unscented particle filter.The simulation is carried out under the flat Rayleigh fading channel and its results show that unscented particle filter can get higher detection accuracy than traditional particle filer.Under the condition of user number increasing and the power of interference user changing unscented particle filter still shows better performance.Therefore the method is prior to traditional particle filter in detection performance and anti-interference ability.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第21期137-140,共4页
Computer Engineering and Applications
基金
国家自然科学基金No.60802060
国家部委重点实验室基金~~
关键词
异步码分多址(CDMA)
盲多用户检测
无迹粒子滤波
asynchronous Code Division Multiple Access（CDMA）
blind multi-user detection
Unscented particle filter
