Title :
Frequency-domain realizations of adaptive parallel-cascade quadratic filters
Author :
Li, Linshan ; Mathews, V.John
Author_Institution :
Coll. of Marine Eng., Northwestern Polytech. Univ., Xian, China
Abstract :
Parallel-cascade realizations of truncated Volterra systems implement higher-order systems using a parallel connection of multiplicative combinations of lower-order systems. Such realizations are modular and permit efficient approximations of truncated Volterra systems. Frequency-domain realizations of the least-mean-square (LMS) adaptive filter and the normalized LMS adaptive filter that implements the system model using the parallel-cascade structure are presented in this paper. Computational complexity analysis and simulation results show that the normalized frequency-domain, parallel-cascade LMS adaptive quadratic filter has the advantages of computational simplicity and superior performance over direct form realizations
Keywords :
adaptive filters; cascade networks; computational complexity; filtering theory; frequency-domain synthesis; least mean squares methods; adaptive parallel-cascade quadratic filters; computational complexity analysis; frequency-domain realizations; least-mean-square adaptive filter; normalized LMS adaptive filter; simulation results; truncated Volterra systems; Adaptive filters; Analytical models; Computational modeling; Concurrent computing; Educational institutions; Electronic mail; Frequency domain analysis; Least squares approximation; Nonlinear filters; Vectors;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.681794
