Implementation of Multi-Frequency Continuous Wave Radar for Respiration Detection Using Software Defined Radio

Utilizing Continuous Wave Radar System (CW) radar for non-contact human respiratory detection using the Continuous Wave Radar System (CW) has a weakness in determining the target distance. Therefore, it can't support in a radar feature in detecting multiple target. A number of CW radar are required in the detection of several targets simultaneously. Development of respiratory radar capability to detect distance needs to be done. In this paper, an implementation study on multi-frequency CW method was performed and proposed to overcome this weakness. The implementation of Continuous Wave Multi-Frequency Radar System (MFCW) using Software Define Radio (SDR) is carried out to prove the ability of the MFCW radar system in respiratory detection. The results show that the MFCW radar system can detect respiratory patterns and target distances.