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arXiv 2002.02241eess.SP
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多目标优化在盲源分离中的应用

Application of multi-objective optimization to blind source separation

Guilherme Dean Pelegrina, Romis Attux, Leonardo Tomazeli Duarte

摘要:

信号处理中的几个问题是由专家系统解决的,该专家系统考虑了所寻找的信号和系统的一组先验。例如,盲源分离通常通过依赖于与所寻找的信号(源)的给定属性相关联的分离准则的单目标公式来解决。然而,在许多实际情况下,有一个以上的属性被利用,因此,可以使用一组分离标准来恢复原始信号。在这种情况下,本文解决了分离问题的方法基于多目标优化。从现有的方法,它只提供一个估计的原始信号,我们的建议导致一组解决方案,可以利用系统用户采取他/她的决定。通过一组生物医学信号的数值实验获得的结果突出了所提出的方法,它提供了更接近的均方误差的解决方案相比,通过一个单目标制定的估计的可行性。此外,由于我们的建议是相当普遍的,这项工作也有助于鼓励未来的研究开发专家系统,利用多目标制定在不同的源分离问题。

英文摘要:

Several problems in signal processing are addressed by expert systems which take into account a set of priors on the sought signals and systems. For instance, blind source separation is often tackled by means of a mono-objective formulation which relies on a separation criterion associated with a given property of the sought signals (sources). However, in many practical situations, there are more than one property to be exploited and, as a consequence, a set of separation criteria may be used to recover the original signals. In this context, this paper addresses the separation problem by means of an approach based on multi-objective optimization. Differently from the existing methods, which provide only one estimate for the original signals, our proposal leads to a set of solutions that can be utilized by the system user to take his/her decision. Results obtained through numerical experiments over a set of biomedical signals highlight the viability of the proposed approach, which provides estimations closer to the mean squared error solutions compared to the ones achieved via a mono-objective formulation. Moreover, since our proposal is quite general, this work also contributes to encourage future researches to develop expert systems that exploit the multi-objective formulation in different source separation problems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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