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Recent improvements in wireless communication have made a drastic development over wireless sensor networks and wireless embedded systems. Because of the reliable cost, ease of development, small size, wireless sensors are used in many applications such as collecting data of any event like temperature, humidity, seismic event. Wireless sensor is a small processing device called node which captures raw data from the physical environment, process it, communicate the raw data wirelessly among other nodes and finally transmit the collected raw data to the sink node. The raw data collected by the sensor nodes are generally spatially correlated among other sensor nodes in the physical environment.
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