Title :
A study on adaptive algorithm based on correlation and variable delay for IIR ADF
Author :
Higuchi, Tatsuya ; Sasaoka, Naoto ; Okello, James ; Itoh, Yoshio ; Kobayashi, Masaki
Author_Institution :
Grad. Sch. of Eng., Tottori Univ., Tottori, Japan
Abstract :
In adaptive signal processing, the equation-error algorithm for an infinite impulse response (IIR) adaptive digital filter (ADF) has been well known as a stability system. However, the algorithm degrades the estimate accuracy due to a bias. In order to solve the problem, the equation error algorithm based on correlation and variable delay is proposed in this paper. Since an input signal is independent from disturbance, the bias is reduced by using the correlation between an input signal and desired signal as the tap input of the ADF. However, when an input signal is stationary, the tap input is constant and tap coefficient cannot converge. Therefore, the delay of correlation is varied to avoid the situation.
Keywords :
IIR filters; adaptive filters; adaptive signal processing; correlation methods; IIR ADF; adaptive algorithm; adaptive signal processing; correlation; equation-error algorithm; infinite impulse response adaptive digital filter; stability system; variable delay; Adaptive algorithm; Adaptive signal processing; Delay; Digital filters; Educational institutions; Equations; Finite impulse response filter; IIR filters; Signal processing algorithms; Stability;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2009. ISPACS 2009. International Symposium on
Conference_Location :
Kanazawa
Print_ISBN :
978-1-4244-5015-2
Electronic_ISBN :
978-1-4244-5016-9
DOI :
10.1109/ISPACS.2009.5383816
