Title: A minimised complexity dynamic structure adaptive filter design for improved steady state performance analysis

Authors: Asutosh Kar; Mahesh Chandra

Addresses: Department of Electronics and Telecommunication Engineering, IIIT, Bhubaneswar, Pin – 751003, Odisha, India ' Department of Electronics and Communication Engineering, BIT, Mesra, Ranchi, Pin-835215, India

Abstract: The structural complexity and overall performance of the adaptive filter depend on its structure. The number of taps is one of the most important structural parameters of the liner adaptive filter. In practice the system length is not known a priori and has to be estimated from the knowledge of the input and output signals. In a system identification framework the tap-length estimation algorithm automatically adapts the filter order to the suitable optimum value which makes the variable order adaptive filter a best identifier of the unknown plant. In this paper an improved pseudo-fractional tap-length selection algorithm is proposed to find out the optimum tap-length which best balances the complexity and steady state performance. The performance analysis is presented to formulate steady state tap-length in correspondence with the proposed algorithm. Simulations and results are provided to observe the analysis and to make a comparison with the existing tap-length learning methods.

Keywords: adaptive filter design; tap-length estimation; mean square error; MSE; convergence; structure adaptation; system identification; signal to noise ratio; SNR; structural complexity; simulation.

DOI: 10.1504/IJCVR.2013.059100

International Journal of Computational Vision and Robotics, 2013 Vol.3 No.4, pp.326 - 340

Received: 19 Mar 2013
Accepted: 21 Aug 2013
Published online: 18 Jul 2014 *

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