2003 Volume 123 Issue 12 Pages 2127-2132
In this paper we propose the structure and the adaptive algorithm of a hierarchy type adaptive filter. This adaptive filter is composed of the filter that has the steady arbitrary transfer function instead of the delay of the conventional FIR type adaptive filter. In general, the unknown system has the multiple reflection of the signal at the signal source impedance and the load impedance. The multiple reflection enlarges the length of the impulse response of the unknown system, and the estimation becomes difficult by the conventional FIR type adaptive filter. The proposed adaptive filter estimates the relatively short impulse response that does not include any reflection and the reflection coefficients independently. Finally, the convergence performances of this adaptive filter are verified by the computer simulation.