Methods and systems for remote sleep monitoring

A method for remote sleep monitoring, the method comprising:

• transmitting a radar signal toward a subject;
• receiving a radio frequency (RF) response signal corresponding to the radar signal;
• monitoring vital signs of a subject, the vital signs comprising a respiratory signal and a cardiac signal, the monitoring of the vital signs comprising:
• processing the RF response signal, the processing comprising:
• producing vital sign signals, the vital sign signals comprising the respiratory signal and a mixed respiratory and cardiac spatial channel;
• extracting the cardiac signal from the mixed respiratory and cardiac spatial channel;
• producing spatio-temporal data of motion response in the RF response signal;
• and
• range gating the spatio-temporal data to produce a plurality of spatial channels comprising one or more respiratory spatial channels and one or more mixed respiratory and cardiac spatial channels;
• and
• monitoring the vital sign signals over an evaluation period;
• and
• classifying a sleep state of the subject based on results from monitoring the vital signs.