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

Claim 17:
18. A system of bed side units for transmitting radio frequencies for physiological motion sensing for detecting sleep comprising:
a first radio frequency motion sensing apparatus for physiological motion sensing as a bedside unit; and
a second radio frequency motion sensing apparatus for physiological motion sensing as a bedside unit;
wherein the first radio frequency motion sensing apparatus is configured to transmit a first radio frequency (RF) signal in pulses; and
the second radio frequency motion sensing apparatus is configured to transmit a second RF signal in pulses,
wherein the system is arranged to minimise interference between the RF signals of both sensing apparatus according to an organized timing scheme, wherein the first radio frequency motion sensing apparatus is configured to transmit the first RF signal 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.