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Wireless Sensor Networks (WSNs), is one of the most emerging technologies in recent years. Signal processing between sensor nodes to the base station is most important task for these networks. Target tracking in WSN mainly focuses on localization and object tracking. This paper addresses various cluster based target tracking techniques in wireless sensor networks. To support reliability, energy efficiency and efficient routing, nodes are often grouped into clusters. The clusters can be formed before the intrusion enters the network which is called the static method or clusters are created by using signal strength from target which is called the dynamic method. This paper gives a various cluster based target tracking methods for efficient target tracking in WSN.
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