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Pulse Oximeter (PO) employed in critical care units is crucial equipment to measure the vital parameters like oxygen blood saturation levels and heart rate of the patient. Using PO device, required medical data is acquired using the photoplethysmographic (PPG) data utilizing PPG sensors attached on forehead/ to finger/at earlobe of the patient and then Ratio parameter (R) is computed pertaining to...
Pulse oximeter employed in intensive care units and is a crucial equipment employed to measure the vital parameters like heart rate and blood oxygen saturation levels. Using Pulse oximeter, photoplethysmographic (PPG) data is recorded using the PPG sensors attached to the patient is used to estimate oxygen saturation levels. Patient movements while recording the PPG data may result in erroneous estimation...
Different signal processing methods are proposed for addressing the motion artifact (MA) related issues in pulse oximetry applications. MA corruption due to voluntary or involuntary movements of patient, while recording the photoplethysmographic (PPG) data using pulse oximeter, is the main source of error in the estimation of arterial blood oxygen saturation (SpO2). In this paper, for addressing the...
Present day wireless communication systems require a high data rate wireless access, for which the prerequisite is larger bandwidth. Obviously, to mitigate the inter symbol interference (ISI) caused by the multipath fading of high data rate communication system is orthogonal frequency division multiplexing (OFDM). The major challenging task in multiple input multiple output (MIMO) OFDM systems is...
Most of the intensive care units (ICU) are equipped with commercial pulse oximeters for monitoring arterial blood oxygen saturation (SpO2) and pulse rate (PR). Photoplethysmographic (PPG) data recorded from pulse oximeters usually corrupted by motion artifacts (MA), resulting in unreliable and inaccurate estimated measures of SpO2. In this paper, a simple and efficient MA reduction method based on...
Over the last decade or so, the data rate and spectrum efficiency of wireless communication systems has been significantly improved with the advent of multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) technology. In order to operate in the most effective way, OFDM-based communication systems need accurate channel estimation. The channel estimation in OFDM communication...
In addition to estimation of arterial blood oxygen saturation , pulse oximeter's photoplethysmographic (PPG) signals can be well utilized for extracting the vital respiratory information. The motion artifacts (MA) in PPGs not only make estimations unreliable and inaccurate but also make it difficult to extract respiratory information. Addressing this issue, for the first time,...
Motion artifact (MA) corrupted photoplethysmographic (PPG) signals are the main source of errors in the estimation of arterial blood oxygen saturation (SpO2) in pulse oximeters. For addressing the issue of MA reduction in pulse oximetry applications, the physical origins of PPG signals are to be explored and effective signal processing technique may be employed. In this paper, we propose simple and...
In 4G broadband wireless communications, a multiple input multiple output (MIMO) system with orthogonal frequency division multiplexing (OFDM) is the most promising and efficient system for high data rate communication. OFDM effectively mitigates inter symbol interference (ISI) caused by the delay spread, due to the multipath propagation effects, inherently present in the wireless channel. Channel...
Ever since the medical device pulse oximeter was invented, reliable and accurate estimation of arterial blood oxygen saturation (SpO2), based on the differential absorption of red/infrared light by hemoglobin's, has been a challenging task. The Photoplethysmogram (PPG) waveform, also known as the “pulse oximetry waveform”, is well recognized for its use in pulse oximetry applications for the estimation...
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