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Date:  Mon, December 13, 2021
Time:  10:00am - 12:00pm
Location:  online, email for details
Speaker:  Khaldoon Ishmael, student in PhD program, advisor Dr. Olga Boric-Lubecke

Comprehensive Exam abstract:

Physiological signal sensing using microwave Doppler radar has attracted significant interest due to its unobtrusive and non-contact operation. The Doppler radar can potentially be used as a wireless biosensor to detect a human's heart and respiratory signals through clothing and obstacles. This is beneficial for long-term sensing and monitoring applications such as for example sleep studies, smart building occupancy sensing, and authentication based on cardiopulmonary patterns. In recent years, individuals' information in our environment has progressively grown in value. This information includes people's presence, count, location, and physiology. The physiological signals can provide valuable information about a person, such as comfort level, emotional status, and identity authentication. However, distinguishing multiple sources within radar antenna beam is a significant challenge. This research investigates a new separation method for individual breathing signatures from a combined mixture of multiple physiological signals captured by a single channel radar system. The proposed approach explores tuning radar range, phase, and frequency of operation to enhance or suppress individual signals. Preliminary results demonstrate that this method can distinguish physiological signals from two closely spaced sources at the same nominal range from the radar antenna.