Title: System simulation and comparative analysis of foetal heart sound de-noising techniques for advanced phonocardiography

Authors: A.K. Mittra, Anupam Shukla, A.S. Zadgaonkar

Addresses: Department of Electronics Engineering, Manoharbhai Patel Institute of Engineering and Technology, Gondia (MS), India. ' Department of ITC, ABV Indian Institute of Information Technology and Management, Gwalior (MP), India. ' Rungta College of Engineering and Technology, Bhilai (CG), India

Abstract: In health care centres, some precise and multifunctional ultrasound based systems are used for Foetal Heart Rate (FHR) monitoring. These monitors are invasive and cannot be used for prolonged home monitoring applications. In previous work, authors have developed a prototype FHR home monitoring system. The objective of this work is to present an effective de-noising technique for the phonocardiographic signal obtained from the prototype device. Various digital noise cancellation techniques are compared and analysed for their performance through Matlab simulation. The experimental results show that, adaptive filtering using Recursive Least Squares (RLS) algorithm is the most appropriate methodology for the foetal phonocardiographic signals de-noising implementation.

Keywords: cardiotocography; foetal monitoring; signal processing; simulation; wavelet transform; foetal heart rate; sound denoising; home monitoring; phonocardiographic signals; advanced phonocardiography; biomedical engineering; biomedical technology; noise cancellation; adaptive filtering; recursive least squares; RLS.

DOI: 10.1504/IJBET.2007.014138

International Journal of Biomedical Engineering and Technology, 2007 Vol.1 No.1, pp.73 - 85

Published online: 22 Jun 2007 *

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