Patent ID: 11857300
Assignee: RESMED SENSOR TECHNOLOGIES LIMITED
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A radio frequency physiological motion sensing apparatus configured as a bedside unit and for operation in a multi-sensor location, for detecting physiology motion characteristics indicative of sleep, the physiological motion sensing apparatus comprising:
a radio frequency transmitter, the transmitter configured to emit radio frequency signals in pulses; and
a receiver configured to receive reflected ones of the emitted radio frequency signals to detect motion of a reflecting surface;
wherein the transmitter is configured for transmission of the radio frequency signals with another radio frequency physiological motion sensing apparatus in a vicinity of the radio frequency physiological motion sensing apparatus to mitigate interference between emitted signals from the radio frequency physiological motion sensing apparatuses according to an organized timing scheme, wherein the radio frequency physiological motion sensing apparatus is configured to emit the pulses, each with a pulse width and a pulse repetition interval, wherein the pulse width is a fractional portion of the pulse repetition interval that reduces probability of the interference.