Improvement of Power Efficiency using Smart Antenna System in MANETs.

Performance of ad-hoc networks is low under omnidirectional antenna systems compared to smart antenna system. Directional antennas cover large area & save some amount of transmitted power because it focuses in desired direction accordance with mobility of nodes while Omnidirectional antennas cover small area & needs large transmitted power as compared to Smart Antenna System (SAS). In this paper, we will overcome the problem of unnecessary transmitted power wastage with omnidirectional antenna system in ad-hoc wireless networks by using Smart Antenna Systems (SAS). We will calculate & analyze transmitted power variations with different number of mobile nodes in mobile ad-hoc networks [MANETs] with smart antenna system (SAS) & Omni-directional antenna system in different conditions. Firstly, we will calculate & analyze transmitted power during flooding of packets means in case of route creation, and secondly, when communication will established between transmitter & receiver.