The Emulating Study On The Technology For Canceling The Strong Clutters In Life Detector Based On Radar

The life detector based on radar is a non-contact life detecting device, which radiates the microwave beam to the human subject. The echo waves of the radar are modulated by the minute body-movement introduced by the life activities of the human subject, which makes the parameters such as frequency and phase of the echo signals changed. The life-parameter can be extracted from the changes described above. The life detector can be applied to search the wounded soldiers in the wartime and to locate the wounded under the earthquakes.When the life detector based on radar works outside, there exists some obstacles such as the walls, debris between the detector and the detecting objects produced strong echo waves and clutter interferences ,of which the amplitude is stronger than that of the echo waves so as to make the post-amplifier saturated. For example, when the life detector based on radar is used to detect the human subject buried under the debris whether living is or not, the detector can not work normally because the post-amplifier was saturated by the strong clutter interferences produced by the reflected waves from the debris. So as to detect the life-parameter and raise the signal-to-noise ratio (SNR), the strong clutter interferences produced by the obstacles must to be restrained as possible as it can.According to those practical problems mentioned above, the technology for...