Abstract
In recent years, electromagnetic waves have become the medium of information exchange in free space for various applications ranging from home appliances to industrial products, from research laborites to defense applications, from mobiles to health monitoring systems. The development in the noncontact based intruder detection system via human vital sign using Doppler radar has attracted considerable interest of researchers. Due to the non contact nature and deep penetration level of radio frequencies, the vital sign detection system includes various domain of application, viz. medical, security, etc. this paper presents review of RF based intruder detection using CW Doppler radar. In this paper, vital sign detection techniques are presented.
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