Abstract
This paper presents a novel energy-based target localization method in wireless sensor networks with selected sensors. In this method, sensors use Turbo Product Code (TPC) to transmit decisions to the fusion center. TPC can reduce bit error probability if communication channel errors exist. Moreover, in this method, thresholds for the energy-based target localization are designed using a heuristic method. This design method to find thresholds is suitable for uniformly distributed sensors and normally distributed targets. Furthermore, to save sensor energy, a sensor selection method is also presented. Simulation results showed that if sensors used TPC instead of Hamming code to transmit decisions to the fusion center, localization performance could be improved. Furthermore, the sensor selection method used can substantially reduce energy consumption for our target localization method. At the same time, this target localization method with selected sensors also provides satisfactory localization performance.
Highlights
With the advancement of hardware and software, industrial control systems (ICSs) have been widely used in many industrial areas
Compared with direction of arrival (DOA) methods and timedelay of arrival (TDOA) methods, energy-based target localization methods do not require sensors to have the ability to measure the direction of arrived signals, such as in DOA methods, or require accurate synchronization among sensors, such as in TDOA methods
Using the decision transition matrix corresponding to Hamming code and the decision transition matrix corresponding to the Turbo Product Code (TPC), we compared the effect of coding on localization performance
Summary
With the advancement of hardware and software, industrial control systems (ICSs) have been widely used in many industrial areas. The energy-based target localization method which uses quantized data in WSNs was presented in [12]. In energy-based target localization methods, sensors measure the signals from the target and send the measurement information to the fusion center, which uses information from the sensors to estimate the target position [12]. The main contribution of this paper is a novel energybased target localization method in WSNs with selected sensors. In this method, sensors use Turbo Product Code (TPC) to transmit decisions to the fusion center.
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