Sensor-fusion-based blood pressure measurement

A method for measuring blood pressure, comprising:

• emitting, by a radar sensor of a stationary device, radio frequency (RF) signals;
• receiving, by the radar sensor of the stationary device, RF reflection signals based on the emitted RF signals being reflected;
• analyzing, by a processing system of the stationary device, the RF reflection signals at a first distance range to detect movement of the aortic valve of a user;
• identify, based on the detected movement of the aortic valve, a first pulse pressure waveform at the aortic valve of the user;
• receiving, by the processing system of the stationary device, vital sign data measured at an extremity of the user by a mobile device;
• analyzing, by the processing system of the stationary device, the vital sign data to identify a second pulse pressure waveform at the extremity of the user;
• determining, by the processing system of the stationary device, a pulse transit time (PTT) of a pulse pressure wave from the aortic valve of the user to the extremity of the user using the first pulse pressure waveform and the second pulse pressure waveform;
• determining, by the processing system of the stationary device, a blood pressure of the user based on the determined PTT;
• and
• outputting, by the processing system of the stationary device, an indication of the determined blood pressure.

A stationary blood pressure measurement device, comprising:

• a radar subsystem, comprising:
• a radio frequency (RF) emitter that emits RF signals;
• an RF receiver that receives RF reflection signals based on the emitted RF signals being reflected;
• and
• a processing system, comprising one or more processors, in communication with the radar subsystem, wherein the processing system is configured to:
• analyze the RF reflection signals at a first distance range to detect movement of the aortic valve of a user;
• identify, based on the detected movement of the aortic valve, a first pulse pressure waveform at the aortic valve of the user;
• receive vital sign data measured at an extremity of the user by a mobile device;
• analyze the vital sign data to identify a second pulse pressure waveform at the extremity of the user;
• determine a pulse transit time (PTT) of a pulse pressure wave from the aortic valve of the user to the extremity of the user using the first pulse pressure waveform and the second pulse pressure waveform;
• determine a blood pressure of the user based on the determined PTT;
• and
• output an indication of the determined blood pressure.