An Efficient Nonuniform Cosine Modulated Filter Bank Design Using Simulated Annealing

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DOI: 10.4236/jsip.2012.33042    3,490 Downloads   5,624 Views   Citations

ABSTRACT

In this paper, a new approach for the design of non-uniform frequency spacing filter bank using Simulated Annealing has been presented. The filter bank structure is obtained by merging the relevant bands of a uniformly shifted filter bank with integer sampling factors. The design problem is formulated as a single objective unconstrained optimization problem for reducing the amplitude distortion of the overall filter bank for a specified pass-band ripple and stop-band attenuation of the prototype filter. The prototype filter coefficients are optimized using block update method to reach global optimum very quickly and the near perfect reconstruction of the filter bank is also preserved. Simulation results demonstrate that the linear-phase non-uniform filter banks designed by the proposed method have small amplitude distortions and aliasing distortions. Using this technique to minimize design objective is suitable for filter banks applied in sub-band filtering because linear phase property is assured here.

Cite this paper

S. Dhabal and P. Venkateswaran, "An Efficient Nonuniform Cosine Modulated Filter Bank Design Using Simulated Annealing," Journal of Signal and Information Processing, Vol. 3 No. 3, 2012, pp. 330-338. doi: 10.4236/jsip.2012.33042.

Conflicts of Interest

The authors declare no conflicts of interest.

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