Method and system for determining respiration rate

A system comprising:

• a signal acquisition system configured to receive a plurality of signals comprising a first signal and a second signal, each signal being representative of physiological parameters of a subject;
• and
• at least one processor coupled to the signal acquisition system, the at least one processor encoded with instructions to perform signal processing of the first and second signals, the instructions including:
• a cardiac-artifact removal module to process each signal among the first signal and the second signal to remove a cardiac artifact signal and generate a first processed signal and a second processed signal respectively;
• a motion-artifact removal module to process each signal among the first processed signal and the second processed signal, using a polynomial fitting technique, to remove a motion artifact signal and generate a first periodic signal and a second periodic signal respectively;
• a noise removal module to process each signal among the first periodic signal and the second periodic signal, using a spectral decomposition technique, to remove a residual noise signal and generate a first noise free signal and a second noise free signal respectively;
• an estimation module to process each signal among the first noise free signal and the second noise free signal, using a subspace-based MUSIC technique or ESPRIT technique, and generate a first value and a second value respectively;
• and
• a combining module to determine a combined value based on the first value and the second value, wherein the combined value is representative of a respiration rate of the subject.

A non-transitory computer readable medium encoded with a program to instruct at least one processor to:

• receive a plurality of signals comprising a first signal and a second signal, each signal being representative of physiological parameters of a subject;
• (i) process the first signal to remove a cardiac artifact signal from the first signal and generate a first processed signal and process the second signal to remove the cardiac artifact signal from the second signal and generate a second processed signal;
• (ii) process the first processed signal using a polynomial fitting technique to remove a motion artifact signal from the first processed signal and generate a first periodic signal and process the second processed signal using the polynomial fitting technique to remove the motion artifact signal from the second processed signal and generate a second periodic signal;
• (iii) process the first periodic signal using a spectral decomposition technique to remove a residual noise signal from the first periodic signal and generate a first noise free signal and process the second periodic signal using the spectral decomposition technique to remove the residual noise signal from the second periodic signal and generate a second noise free signal;
• (iv) process the first noise free signal using a subspace-based MUSIC technique or ESPRIT technique to generate a first value and process the second noise free signal using the subspace-based technique to generate a second value;
• and
• determine a combined value based on the first value and the second value, wherein the combined value is representative of a respiration rate of the subject.