An experimental approach of breathing cycle detection based on FMCW radar at WiFi band

This paper describes an experimental approach for breathing detection based on FMCW radar for indoors applications. The study involved an in-house developed 2.4 GHz FMCW radar system using an AM envelop technique and related algorithms for signal processing. To evaluate breathing rate, datasets were obtained considering a fixed subject (sitting person). The experimental results exhibit a good agreement for detecting breathing cycle of human being with a distance up to 2 meters which demonstrate that bioradar is able to detect life-sign.