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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/928757
- A recursive method for the approximation of LTI systems using subband processing
- The University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science
- Using the subband technique, an LTI system can be implemented by the composition of an analysis filterbank,followed by a transfer matrix (subband model) and a synthesis filterbank. The advantage of this approach is that it offers a good tradeoff between latency and computational complexity. In this paper we propose an optimization method for approximating an LTI system using the subband technique. The proposed method includes optimal allocation of parameters from different FIR entries of the subband model, while keeping constant the total number of parameters, for a better utilization of the available coefficients. The optimization is done in a weighted least-squares sense considering either linear or logarithmic amplitude scale. Simulation results demonstrate the advantages of the proposed method when compared with classical implementation approaches using pole-zero transfer functions or segmented FFT algorithms.
- IEEE Transactions on Signal Processing Vol. 58, Issue 3, p. 1025-1034
- Publisher Link
- Institute of Electrical and Electronics Engineers (IEEE)
system analysis and design;
subband signal processing
- Resource Type
- journal article
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