Portable sub-THz and THz radar system for remote physiological parameters detection and method with harmonic and fundamental components

A method of remotely detecting at least one physiological parameter of at least one subject, the method comprising:

• providing a portable non-invasive sub-THz and THz radar system for remotely detecting physiological parameters of a subject, comprising:
• one or more transmitters, configured to transmit a transmitted signal to tissue of the subject, at a frequency range of 0.03 to 3 THz;
• one or more receivers, configured to receive a reflection of the transmitted signal from said tissue, as a reflected signal;
• and
• a microprocessor configured to communicate with at least one of the transmitter and the receiver, and configured to receive and process the reflected signal;
• and
• using the microprocessor:
• pretreatment and folding said reflected signal;
• filtering and decimating selected portions of the folded signal, and removing folded segments of the folded signal;
• decomposing the decimated signal into sub-component signals;
• identifying and removing sub-component signals due to random motions of the subject;
• locating quasi-periodic signal components within the remaining sub-component signals;
• and
• selecting and utilizing fundamental physiological signal components and respective harmonics from the remaining sub-component signals to determine at least one physiological parameter of said subject, based upon remaining spectral content and harmonic behavior and groupings thereof.