一种基于共轭梯度算法的盲自适应干扰抑制技术  

Blind adaptive interference cancellation technology based on conjugate gradient algorithm

作　　者：隗炜[1] 张贤达[1] 

机构地区：[1]清华大学自动化系智能技术与系统国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2002年第3期362-364,368,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目 (69772 0 2 3 )

摘　　要：盲干扰抑制技术是在不知道系统参数 ,不需要训练序列的情况下 ,有效抑制 Direct Spread Code DivisionMultiple- Access(DS- CDMA)系统的多址干扰的有效方法。根据受限最小输出能量准则并利用空间正交投影技术 ,该文提出了一种新的基于共轭梯度算法的盲自适应干扰抑制算法。仿真分析比较表明 ,与现有的基于 L east Mean- Square(L MS)算法、基于 Recursive L east- Squares (RL S)算法等盲自适应干扰抑制技术相比 ,该算法具有收敛速度快速稳定、输出性能好。Blind adaptive interference cancellation technology is one key technology for direct spread code division multiple access (DS CDMA) systems for cancelling multiple access interference (MAI) in DS CDMA systems without knowing the system parameters or using the training sequences. A novel blind adaptive interference cancellation technology is proposed based on the conjugate gradient algorithm using the criterion of constrained minimum output energy (CMOE) and orthogonal projection technology. The convergence speed and tracking performance of our algorithm, least mean square (LMS) algorithm and recursive least square (RLS) algorithm are analyzed by numerical simulation.

关 键 词：共轭梯度算法 盲自适应干扰抑制技术 DS-CDMA 

分 类 号：TN929.533[电子电信—通信与信息系统]