Filtering channel responses for motion detection

A device comprising:

• one or more processors;
• memory storing instructions that are operable when executed by the one or more processors to perform operations comprising:
• obtaining a frequency-domain channel response based on a wireless signal transmitted through a space, the wireless signal being formatted according to a wireless communication standard;
• generating a time-domain channel response based on the frequency-domain channel response;
• generating a filtered time-domain channel response based on a constraint applied to the time-domain channel response, wherein the constraint is indicative of a maximum delay with which a pulse can reach a receiving wireless communication device, the constraint being determined by a maximum attenuation the pulse can experience in the space and be received by the receiving wireless communication device;
• generating a reconstructed frequency-domain channel response based on the filtered time-domain channel response;
• and
• determining a state of the space based on the reconstructed frequency-domain channel responses.

A method comprising:

• obtaining a set of frequency-domain channel responses based on a set of wireless signals transmitted through a space, each of the frequency-domain channel responses corresponding to a respective wireless signal of the set of wireless signals, the set of wireless signals being formatted according to a wireless communication standard;
• generating a set of time-domain channel responses based on the set of frequency-domain channel responses;
• generating a set of filtered time-domain channel responses based on a constraint applied to each time-domain channel response of the set of time-domain channel responses, wherein the constraint is indicative of a maximum delay with which a pulse can reach a receiving wireless communication device, the constraint being determined by a maximum attenuation the pulse can experience in the space and be received by the receiving wireless communication device;
• generating a set of reconstructed frequency-domain channel responses based on the set of filtered time-domain channel responses;
• and
• detecting motion of an object in the space based on the set of reconstructed frequency-domain channel responses.

A device comprising:

• one or more processors;
• memory storing instructions that are operable when executed by the one or more processors to perform operations comprising:
• obtaining a set of frequency-domain channel responses based on a set of wireless signals transmitted through a space, each of the frequency-domain channel responses corresponding to a respective wireless signal of the set of wireless signals, the set of wireless signals being formatted according to a wireless communication standard;
• generating a set of time-domain channel responses based on the set of frequency-domain channel responses;
• generating a set of filtered time-domain channel responses based on a constraint applied to each time-domain channel response of the set of time-domain channel responses, wherein the constraint is indicative of a maximum delay with which a pulse can reach a receiving wireless communication device, the constraint being determined by a maximum attenuation the pulse can experience in the space and be received by the receiving wireless communication device;
• generating a set of reconstructed frequency-domain channel responses based on the set of filtered time-domain channel responses;
• and
• detecting motion of an object in the space based on the set of reconstructed frequency-domain channel responses.