An Improvement in Maximum Likelihood Location Estimation Algorithm in Sensor Networks

A wireless sensor network contains many sensors that Spread in an environment and gather the information from their vicinity [1]. Wireless sensor networks are tremendously being used in different environments to perform various monitoring tasks such as search, rescue, disaster relief, target tracking and a number of tasks in smart environments. May be the location of sensors are not predefined and given [10]. This feature helps to use them in hazardous or inaccessible places. These sensors after gathering the information from environment and process the data send them to control stations. Later on other parts decide and act based on received information. One of the challenging problems exists in wireless sensor network that is how to obtain location information for sensor nodes present in the network [1].