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https://hdl.handle.net/2440/52067
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Type: | Journal article |
Title: | A comparison of filter design structures for multi-channel acoustic communication systems |
Author: | Dumuid, P. Cazzolato, B. Zander, A. |
Citation: | Journal of the Acoustical Society of America, 2008; 123(1):174-185 |
Publisher: | Acoustical Soc Amer Amer Inst Physics |
Issue Date: | 2008 |
ISSN: | 0001-4966 1520-8524 |
Statement of Responsibility: | Pierre M. Dumuid, Ben S. Cazzolato, and Anthony C. Zander |
Abstract: | The application of inverse filter designs as a means of providing improved communication performance in acoustic environments is investigated. Tikhonov regularized inverse filters of channel transfer functions calculated in the frequency domain are used as a means of obtaining multi-channel filters. Three classifications of inverse filter structures have been considered using time-domain simulations. The performance of Tikhonov regularized inverse filters designed according to each of these classifications is compared with each other and against a filter design developed by Stojanovic [Stojanovic, M. (2005). "Retrofocusing techniques for high rate acoustic communications," J. Acoust. Soc. Am. 117, 1173-1185]. It is shown that the filter design developed by Stojanovic requires less regularization and outperforms the Tikhonov regularized inverse filter designs when communicating over a single channel. While the filter developed by Stojanovic is designed to use multiple transmitters to transmit to a single receiver, the filter was implemented in a multi-channel system and proposed to have a focusing similar to that obtained using time-reversal. It was found that for the scenario used in the simulation, the Tikhonov regularized inverse design for full multi-channel inversion achieved better focusing than the design by Stojanovic, where simulation results show 20 dB less cross-talk at the expense of around 2 dB loss in signal strength. |
Keywords: | acoustic filters acoustic signal processing |
DOI: | 10.1121/1.2804940 |
Published version: | http://dx.doi.org/10.1121/1.2804940 |
Appears in Collections: | Aurora harvest Environment Institute publications Mechanical Engineering publications |
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