两种改进的信道阶数估计算法  

Two modified algorithms for channel order estimation

作　　者：田营[1] 葛临东[1] 王彬[1] 马艳清 

机构地区：[1]解放军信息工程大学信息工程学院 [2]解放军73086部队

出　　处：《计算机应用研究》2012年第1期119-122,共4页Application Research of Computers

基　　金：河南省基础与前沿基金资助项目(082300413205)

摘　　要：在传统有效秩检测准则的基础上,通过分析自相关矩阵特征值分解后的相邻三个特征值之间的约束关系,重新构造目标函数,得到了两种改进的有效秩检测准则,提高了对信道阶数的估计性能。仿真实验给出了算法在不同信噪比和信道下的估计性能,结果表明,改进的准则比原算法对信噪比的要求降低了10 dB左右。In constructed order to overcome the shortcomings of traditional effective rank detection criterion,this paper presented two modified criterions,in which two new objective functions respectively based on the different constraints among three successive eigenvalues.Theoretical analysis shows that the proposed criterions improve the estimation performance.Simulation results present the performance and behaviour at various SNR and different channel conditions,and they show that the modified algorithms require lower SNR about 10 dB than traditional method.

关 键 词：有效秩检测准则 信道阶数估计 信道盲辨识 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]