Room boundary detection

A method comprising:

• receiving, by processing circuitry, radar signals reflected by boundary segments of a bounded area;
• identifying, of the radar signals received, multi-path radar signals that have reflected off of multiple boundary segments of the bounded area;
• determining estimated locations along the boundary segments based on tracking of user movement within the bounded area;
• and
• rejecting multi-path signals that indicate locations outside the estimated locations.

The method of 10, wherein identifying multi-path radar signals includes:

• calculating travel times of the radar signals;
• comparing the calculated travel times to expected travel times;
• and
• identifying signals with travel times exceeding a threshold as multi-path signals.

A method comprising:

• tracking movement of a user within a room using radar signals;
• estimating locations on walls of the room based on the tracking of the user movement;
• determining dimensions of the room based on estimated locations on walls of the room;
• calculating a volume of the room based on the determined dimensions of the room;
• transmitting a signal representing the volume of the room to a heating, ventilation, and air conditioning (HVAC) system;
• and
• controlling, by the HVAC system, at least one of airflow rate, fan speed, and damper settings based on the signal.

A non-transitory computer-readable medium storing instructions configured to be executable by processing circuitry for causing the processing circuitry to:

• continuously track movement of a user within a bounded area during a boundary detection process based on radar data received by the processing circuitry;
• estimate locations of segments of the boundary based on initial movement data;
• update the estimated locations based on during the boundary detection process as new movement data is received;
• provide feedback to the user regarding status of the boundary detection process;
• and
• terminate the boundary detection process when the processing circuitry determines that the latest updated estimated locations are satisfactory for estimating the boundary.