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Wireless Integrated Network Sensors (WINS) now provide a new monitoring and control
capability for monitoring the borders of the country. WINS combine sensing, signal processing,
decision capability, and wireless networking capability in a compact, low power system. Using
this concept we can easily identify a stranger or some terrorists entering the border. The border
area is divided into number of nodes. Each node is in contact with each other and with the main
node. The noise produced by the foot-steps of the stranger is collected using the sensor. This
sensed signal is then converted into power spectral density and then compared with reference
value of our convenience. Accordingly the compared value is processed using a microprocessor,
which sends appropriate signals to the main node. Thus the stranger is identified at the main
node. A series of interface, signal processing, and communication systems have been
implemented in micro power CMOS circuits. A micro power spectrum analyzer has been
developed to enable low power operation of the entire WINS system. But it is very cheaper when
compared to other security systems such as RADAR under use. It produces a less amount of
delay. Hence it is reasonably faster.