Time-alignment of motion detection signals using buffers

A non-transitory computer-readable storage medium storing instructions that are operable when executed by the data processing apparatus to perform operations comprising:

• loading a first set of input signals into an interference buffer over a first time period, the first set of input signals based on a first set of wireless signals received by a wireless communication device after being wirelessly transmitted through a space;
• using the first set of input signals to determine a wireless interference level;
• and
• in response to a determination that the determined wireless interference level is below a threshold level, executing a motion detection process in a second, subsequent time period over which a second set of input signals is loaded into the interference buffer, wherein the motion detection process uses a subset of the first set of input signals to detect motion of an object in the space, and the second set of input signals are based on a second set of wireless signals received by the wireless communication device after being wirelessly transmitted through the space.

A motion detection system comprising:

• multiple wireless communication devices, each wireless communication device configured to detect motion of an object in the space based on a series of wireless signals received by the wireless communication device;
• and
• a data processor communicably coupled to the wireless communication devices and configured to:
• load a first set of input signals into an interference buffer over a first time period, the first set of input signals based on a first set of wireless signals received by a wireless communication device after being wirelessly transmitted through a space;
• use the first set of input signals to determine a wireless interference level;
• and
• in response to a determination that the determined wireless interference level is below a threshold level, execute a motion detection process in a second, subsequent time period over which a second set of input signals is loaded into the interference buffer, wherein the motion detection process uses a subset of the first set of input signals to detect motion of an object in the space, and the second set of input signals are based on second set of wireless signals received by the wireless communication device after being wirelessly transmitted through the space.