Systems and methods for remote long standoff biometric identification using microwave cardiac signals

A method for biometrically identifying a person using microwave signals, the method comprising:

• receiving a microwave cardiac signal comprising cardiac beats, the microwave cardiac signal obtained from reflected microwave signals comprising an electrocardiographic-related waveform and an impedance-cardiographic-related waveform;
• segmenting the microwave cardiac signal into individual segments;
• extracting features from the segments;
• and
• performing pattern identification of the features in the individual segments with a pre-existing data set.

A method for remote biometric identification using microwave cardiac signals, the method comprising:

• generating and directing first microwave energy in a direction of a person;
• receiving microwave energy reflected from the person, the reflected microwave energy indicative of cardiac characteristics of the person, the cardiac characteristics comprising an electrocardiographic-related characteristic and an impedance-cardiographic-related characteristic;
• segmenting a signal indicative of the reflected microwave energy into a waveform indicative of a plurality of heart beats and the cardiac characteristics;
• identifying patterns in the microwave waveform;
• and
• identifying the person based on the identified patterns and a stored microwave waveform.

A system for remote biometric identification using microwave cardiac signals, the system comprising:

• microwave measurement circuitry configured to:
• generate a microwave signal;
• transmit the microwave signal in a direction of a person;
• receive microwave energy reflected from the person, the reflected energy comprising cardiac characteristics of the person, the cardiac characteristics comprising an electrocardiographic-related characteristic and an impedance-cardiographic-related characteristic;
• and
• generate a signal indicative of the reflected microwave energy;
• and
• processing circuitry configured to:
• segment the reflected microwave energy signal into a microwave waveform indicative of a plurality of heart beats and the cardiac characteristics;
• identify patterns in the microwave waveform;
• and
• identify the person based on the identified patterns and a stored microwave waveform.