Novel Joint Source-Channel Coding of Periodic ECG Signals for Reliable Wireless Patient Monitoring

Katsuhiro WATANABE
Tetsushi IKEGAMI

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.4    pp.819-825
Publication Date: 2010/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.819
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Information and Communication Technology for Wellness and Medical Applications)
channel coding,  ECG (electrocardiogram),  side information,  correlation,  

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This paper proposes a joint source-channel coding technology to transmit periodic vital information such as an electrocardiogram. There is an urgent need for a ubiquitous medical treatment space in which personalized medical treatment is automatically provided based on measured vital information. To realize such treatment and reduce the constraints on the patient, wireless transmission of vital information from a sensor device to a data aggregator is essential. However, the vital information has to be correctly conveyed through wireless channels. In addition, sensor devices are constrained by their battery power. Thus, a coding technique that provides robustness to noise, channel efficiency and low power consumption at encoding is essential. This paper presents a coding method that uses correlation of periodic vital information in the time domain, and provides a decoding scheme that uses the correlation as side information in a maximum a posteriori probability algorithm. Our results show that the proposed method provides better performance in terms of mean squared error after decoding in comparison to differential pulse-code modulation, and the uncoded case.