A method of calibrating a radar detection system, the method comprising: selecting a plurality of location indicators, wherein each of the plurality of location indicators has a location; emitting, with a transmitter of a sensor, a radar signal ( S e) to the location of each of the plurality of location indicators; reflecting the radar signal off of a target at the location of each of the plurality of location indicators; receiving, with a receiver of the sensor, the radar signal ( S r) which has been reflected off of the target at the location of each of the plurality of location indicators; communicating, between the sensor and a controller, the location of the target at each of the plurality of location indicators; selecting, with the controller, at least one plurality of locations received from the sensor, wherein the at least one plurality of locations selected with the controller defines a protected region (100, 200, 300); and designating, with the controller, the protected region (100, 200, 300), thereby calibrating the radar detection system such that the radar detection system is capable of detecting an object (104, 204, 304) in the protected region (100, 200, 300); wherein selecting the plurality of location indicators comprises moving the target to each of the plurality of location indicators; and wherein selecting the plurality of location indicators comprises performing at least one calibration signal associated with each of the plurality of location indicators, characterised in that: the target performs the calibrations signal; the target is a user; and the at least one calibration signal is selected from the group consisting of: a stop in movement, a movement, and an acoustic emission. selecting a plurality of location indicators, wherein each of the plurality of location indicators has a location; emitting, with a transmitter of a sensor, a radar signal ( S e) to the location of each of the plurality of location indicators; reflecting the radar signal off of a target at the location of each of the plurality of location indicators; receiving, with a receiver of the sensor, the radar signal ( S r) which has been reflected off of the target at the location of each of the plurality of location indicators; communicating, between the sensor and a controller, the location of the target at each of the plurality of location indicators; selecting, with the controller, at least one plurality of locations received from the sensor, wherein the at least one plurality of locations selected with the controller defines a protected region (100, 200, 300); and designating, with the controller, the protected region (100, 200, 300), thereby calibrating the radar detection system such that the radar detection system is capable of detecting an object (104, 204, 304) in the protected region (100, 200, 300); wherein selecting the plurality of location indicators comprises moving the target to each of the plurality of location indicators; and wherein selecting the plurality of location indicators comprises performing at least one calibration signal associated with each of the plurality of location indicators, characterised in that: the target performs the calibrations signal; the target is a user; and the at least one calibration signal is selected from the group consisting of: a stop in movement, a movement, and an acoustic emission. the target performs the calibrations signal; the target is a user; and the at least one calibration signal is selected from the group consisting of: a stop in movement, a movement, and an acoustic emission.