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Variable Dimension Affine Projection Algorithm  

Choi, Hun (Dep. of Electronics, Chungbuk Nat'l Univ)
Kim, Dae-Sung (Dep. Of Electronic and Information Engineering, Chungcheong College)
Bae, Hyeon-Deok (Dep. of Electronics, Chungbuk Nat'l Univ)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.40, no.5, 2003 , pp. 410-416 More about this Journal
Abstract
In the affine projection algorithm(APA), the projection dimension depends on a number of projection basis and of elements of input vector used for updating of coefficients of the adaptive filter. The projection dimension is closely related to a convergence speed of the APA, and it determines computational complexity. As the adaptive filter approaches to steady state, convergence speed is decreased. Therefore it is possible to reduce projection dimension that determines convergence speed. In this paper, we proposed the variable dimension affine projection algorithm (VDAPA) that controls the projection dimension and uses the relation between variations of coefficients of the adaptive filter and convergence speed of the APA. The proposed method reduces computational complexity of the APA by modifying the number of projection basis on convergence state. For demonstrating the good performances of the proposed method, simulation results are compared with the APA and normalized LMS algorithm in convergence speed and computational quantity.
Keywords
adaptive filtering; variable dimension; affine projection;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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