摘要
基于约束最小四阶矩(LeastMean Fourth,LMF)准则,提出了一种新的高阶统计类型的盲多用户检测方法.通过理论分析和证明,采用此准则的盲多用户检测算法能够收敛于全局最小值,且该极值点符合多用户信号迫零解相关的要求.利用最速下降梯度方法,文中给出了盲自适应LMF接收机形式.该多用户接收机具有运算复杂度低,收敛性能好的特点.在AWGN信道和多用户环境中的仿真结果进一步验证了理论分析的结论.
In CDMA system,a constrained least mean fourth （LMF） criterion is proposed to construct a multiuser detection algorithm. The criterion is proven to have global minima in AWGN environment, and these stationary points can all decorrelate the multiuser signal as expected. The algorithm is a higher-order statistics type approach. Furthermore, an adaptive multiuser detector is obtained by using the method of the steepest descent. The detector has the virtues of global convergence and low computational complexity. In AWGN channel and multiuser environment, the simulation is studied and its results further demonstrate theoretic conclusion.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2006年第9期1631-1634,共4页
Acta Electronica Sinica
基金
国家自然科学基金(No.60432040
60372037)
