一类子空间跟踪方法的改进  

Modification Algorithms for a Class of Subspace Tracking Methods

作　　者：钱林杰[1,2] 程翥[1] 石斌斌[1] 刘海涛[1] 万建伟[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]重庆通信学院,重庆400030

出　　处：《信号处理》2010年第5期741-745,共5页Journal of Signal Processing

基　　金：武器装备预研项目(41901140401)

摘　　要：子空间分析方法广泛应用于信号处理领域,运算复杂度的高低,是决定算法实时性的关键。本文通过对DPM类、OJA类子空间跟踪方法的分析,在保证算法稳健的前提下,提出一类简化运算量的子空间跟踪方法(MFDPM、MFOO-JA)。实验仿真表明,MFDPM、MFOOJA与FDPM、FOOJA具有相似的收敛速度和稳态误差。在有限字长条件下,MFDPM、MFOOJA对舍入误差累积不敏感,具有很强的鲁棒性,并保证子空间基的标准正交收敛。Subspace analysis is a frequently encountered method in many signal processing fields. Computational complexity is a very important point for real time implementation. Starting from analysis of DPM and OJA classes of subspaee tracking methods, we pro- posed modified methods for them, named as MFDPM and MFOOJA, which are numerically stable and less computational complexity. Simulation results verified that the proposed algorithms have similar convergence speed and steady-state error compared to FDPM or FOOJA. And the proposed algorithms are less sensitive to round-off error accumulation under the finite word length condition and guarantee orthonormality convergence, so which are robust.

关 键 词：数据投影 子空间跟踪 运算复杂度 数值稳健 标准正交 

分 类 号：TN911[电子电信—通信与信息系统]