这是一个人体呼吸频率检测的仿真程序，建立频率步进连续波雷达的回波模型，通过对回波数据进行ifft得到距离域一维像，通过回波相位相减的方法来获取人体呼吸频率-This is a human respiratory frequency detector simulation program, the establishment of a continuous stepped frequency radar echo model, through ifft echo data obtained　the field one-dimensional image, to get through the human respiratory frequency echo phase subtraction method