Review of Sleep Monitoring Research Based on Wireless Sensor

Since sleep quality is crucial to human health, sleep monitoring has become a hot spot in the field of smart healthcare. Previous methods depend on polysomnography and wearable devices need immediate contact with the subject, which brings discomfort. Contactless sensors can address this issue. The most common contactless sensors used in sleep monitoring are wireless sensors (including radar and WiFi). To clarify the research in this area, we summarized the existing sleep monitoring methods based on WiFi sensors and wireless radar and made a comparison. The conclusion shows that the two kinds of methods have advantages and disadvantages, so the development of complementary methods is very promising for sleep monitoring.