Abstract
The global pandemic of the coronavirus disease (COVID-19) is dramatically changing the lives of humans and results in limitation of activities, especially physical activities, which lead to various health issues such as cardiovascular, diabetes, and gout. Physical activities are often viewed as a double-edged sword. On the one hand, it offers enormous health benefits; on the other hand, it can cause irreparable damage to health. Falls during physical activities are a significant cause of fatal and non-fatal injuries. Therefore, continuous monitoring of physical activities is crucial during the quarantine period to detect falls. Even though wearable sensors can detect and recognize human physical activities, in a pandemic crisis, it is not a realistic approach. Smart sensing with the support of smartphones and other wireless devices in a non-contact manner is a promising solution for continuously monitoring physical activities and assisting patients suffering from serious health issues. In this research, a non-contact smart sensing through the walls (TTW) platform is developed to monitor human physical activities during the quarantine period using software-defined radio (SDR) technology. The developed platform is intelligent, flexible, portable, and has multi-functional capabilities. The received orthogonal frequency division multiplexing (OFDM) signals with fine-grained 64-subcarriers wireless channel state information (WCSI) are exploited for classifying different activities by applying machine learning algorithms. The fall activity is classified separately from standing, walking, running, and bending with an accuracy of 99.7% by using a fine tree algorithm. This preliminary smart sensing opens new research directions to detect COVID-19 symptoms and monitor non-communicable and communicable diseases.
Highlights
Countries around the globe have been experiencing a pandemic situation since December 2019
Cardiovascular diseases, cancer, diabetes, and other chronic respiratory diseases are categorized as non-communicable diseases
The results are taken from the human physical activities experiments
Summary
Countries around the globe have been experiencing a pandemic situation since December 2019. As the outbreak continues to develop, the whole world is searching for possibilities to preclude the outbreak of the virus in new places, or to stop human-to-human interaction at places where the virus that originates COVID-19 was previously mingling. Many states have legally permitted enforcement of quarantine from time to time when a new variant of COVID-19 starts spreading [1]. With the increasing number of health problems worldwide because of a lack of physical activity during the quarantine period, it is necessary to do indoor physical activities to prevent non-communicable diseases. They cannot spread from one person to another, but can last a long time. Sudden falls due to physical activities may damage the human body, especially when a person is alone
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