Directional communications with smart antenna system to improve energy efficiency in wireless sensor networks

The capacity of wireless sensor network (WSN) can be severely limited due to interference constraints. The integration of smart antenna system (SAS) in wireless sensor networks is a challenging and very attractive technical solution to improve the system capacity, the quality of service, and the power control. Smart antenna system has the advantage over traditional omnidirectional antennas system (OAS), of being able to orientate signals into the desired direction in either transmission node or reception node. In this paper, we create a view of ground with nodes by using MATLAB, firstly nodes composed with OAS and secondly nodes composed of SAS, then we compare active communication using SAS and active communication using OAS. The energy efficiency to bring by smart antenna system is described.