BIO RADAR

PURPOSE: A bio radar is provided to improve the accuracy of detecting a Doppler shift while reducing complexity by extracting data coordinates in proportion to the Doppler shift. CONSTITUTION: A bio radar includes a transmission unit, and a receiver. The bio radar detects frequency shift due to a surface vibration of a heartbeat or breathing within several micrometers by transmitting serial data to an examinee. A transmission unit converts serial data to parallel data at block unit and modulates changed parallel data into the plural number subcarrier waves which are orthogonal. A transmission unit mixed the modulated signal and transmits it. The receiver produces the parallel data by removes the plural number subcarrier waves from the received signal. The receiver receives the doppler shift frequency by converting the parallel data to the serial data.