Multi-person vital signs monitoring using millimeter wave (mm-wave) signals
AssigneeTexas Instruments Incorporated
InventorsAdeel Ahmad, Dan Wang, June Chul Roh
Life of this patent
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Abstract
A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return-mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.
Claims23
A method of monitoring one or more subjects comprising:
- transmitting by at least one transmitting channel, a millimeter wave (mm-wave) signal to the one or more subjects;
- receiving through multiple receiving channels, return-mm-wave signals from the one or more subjects;
- performing a first Fast Fourier Transform (FFT) algorithm on the received return mm-wave signals of each receiving channel;
- concatenating all receiving channel outputs of the multiple receiving channels to generate a range-antenna plane;
- performing a second FFT algorithm on the range-antenna plane to determine angle measurements of each subject;
- comparing and identifying one subject from another subject based upon a difference in the angle measurements between the subjects.
A millimeter wave (mm-wave) system comprising:
- a plurality of transmitters configured to transmit a millimeter wave (mm-wave) signal to one or more subjects;
- a plurality of receivers configured to receive return-mm-wave signals from the one or more subjects;
- a processor coupled to the plurality of transmitters and receivers, the processor is configured to:
- perform a first Fast Fourier Transform (FFT) algorithm on the received return-mm-wave signals of each receiver of the plurality of receivers;
- concatenate all receiver outputs of the plurality of receivers to generate a range-antenna plane;
- perform a second FFT algorithm on the range-antenna plane to determine angle measurements of each subject;
- compare and identify one subject from another subject based upon a difference in the angle measurements between the subjects.
A device comprising:
- a processor:
- a system-on-chip (SOP) coupled to the processor, the SOC is configured to:
- transmit a millimeter wave (mm-wave) signal to one or more subjects;
- receive return-mm-wave signals from the one or more subjects;
- perform a first Fast Fourier Transform (FFT) algorithm on the received return-mm-wave signals for each receiving channel of a multiple receiving channels;
- concatenate all receiving channel outputs of the multiple receiving channels to generate a range-antenna plane;
- perform a second FFT algorithm on the range-antenna plane to determine angle measurements of each subject;
- compare and identify one subject from another subject based upon a difference in the angle measurements between the subjects.
Dependencies are inferred from the claim text.