Amazon patents TV radar that adjusts power to detect when you walk in

1. A computer-implemented method, comprising: implementing, by a television, a first radar configuration for a radar sensor communicatively coupled with the television, the first radar configuration associated with an ingress mode and comprising a first frame per second (FPS) rate and a first difference threshold, wherein the first difference threshold is based at least in part on an average magnitude of radar signal returns detected by the radar sensor over a period of time and a multiplier; receiving, by the television, first data comprising at least two consecutive frames, wherein the at least two consecutives frames comprise output data of radar signal returns from the radar sensor that is using the first radar configuration; determining, by the television, a presence of a user within a field of view of the radar sensor based at least in part on whether a difference between a peak magnitude of radar signal returns in a first frame of the first data and a peak magnitude of radar signal returns in a second frame of the first data exceeds the first difference threshold; instructing, by the television, the television to turn on based at least in part on determining the presence of the user; receiving, by the television, second data from the radar sensor that is using the first radar configuration; determining, by the television, an absence of the user within the field of view of the radar sensor based at least in part on the second data and the first difference threshold; implementing, by the television, a second radar configuration associated with a static presence mode in response to determining the absence of the user, the second radar configuration comprising a second FPS rate and a second difference threshold; receiving, by the television, third data from the radar sensor that is using the second radar configuration; determining, by the television, a static presence of the user within the field of view of the radar sensor based at least in part on the third data and the second difference threshold; and instructing, by the television, to maintain an on state for the television based at least in part on determining the static presence of the user.