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Design of Multiplier-less Continuously Variable Bandwidth Sharp FIR Filters using Modified Gravitational Search Algorithm
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 62 - Number 12 |
| Year of Publication: 2013 |
| Authors: James T. G., Elizabeth Elias |
10.5120/10136-4938
|
James T. G., Elizabeth Elias . Design of Multiplier-less Continuously Variable Bandwidth Sharp FIR Filters using Modified Gravitational Search Algorithm. International Journal of Computer Applications. 62, 12 ( January 2013), 47-57. DOI=10.5120/10136-4938
Abstract
Variable Bandwidth Filters (VBFs) find applications in software defined radios, trans-multiplexers etc. The key features essential for fractional changes in the bandwidth of a VBF are low complexity, easy re-configurability and fine tuning capability. A VBF which has the capability to reduce the bandwidth has been reported recently. This paper proposes the design of a multiplier-less, sharp VBF based on FRM. It is capable of both bandwidth reduction and enhancement. To make the filter totally multiplier-less, the filter coefficients are synthesized in the Canonic Signed Digit (CSD) format. This is formulated as an optimization problem. Recently, Artificial Bee Colony (ABC) algorithm has been proposed for the discrete optimization of the FRM filter performance. In this paper, Gravitational Search Algorithm (GSA) is deployed to get the optimized filter coefficient values.
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