Use of Smart Antennas In Ad Hoc Networks

Abstract

The capacity of ad hoc networks can be severely limited due to interference constraints. One way of using improving the overall capacity of ad hoc networks is by the use of smart antennas. Smart antennas allow the energy to be transmitted or received in a particular direction as opposed to disseminating energy in all directions. This helps in achieving significant spatial re-use and thereby increasing the capacity of the network. However, the use of smart antennas presents significant challenges at the higher layers of the protocol stack. In particular, the medium access control and the routing layers will have to be modified and made aware of the presence of such antennas in order to exploit their use. In this paper we examine the various challenges that arise when deploying such antennas in ad hoc networks and the solutions proposed thus far in order to overcome them. The current state of the art seems to suggest that the deployment of such antennas can have a tremendous impact in terms of increasing the capacity of ad hoc networks.

A Review on a Constructive Smart Antenna Beamforming Technique With Spatial Diversity

“…Adaptive beamforming allows several attractive features. Mohamme d Ali Hussain [6] in 2010 performed a work on the use of smart antennas in ad hoc network. The capacity of ad hoc networks can be severely limited due to interference constraints.…”

A review on optimization of antenna array by evolutionary optimization techniques

“…In order to achieve higher directivity in real time, a single large antenna can be replaced by number of smaller antenna elements combined together to form an antenna array where each antenna element contributes to the radiation pattern of the antenna array. Antenna array have several advantages as in (Peng and Zhao, 2018;Hussain et al, 2010) discussed as follows:…”

“…In order to achieve higher directivity in real time, a single large antenna can be replaced by number of smaller antenna elements combined together to form an antenna array where each antenna element contributes to the radiation pattern of the antenna array. Antenna array have several advantages as in (Peng and Zhao, 2018; Hussain et al , 2010) discussed as follows:Beam-steering can be achieved by antenna array which means to change the direction of radiation;Higher gain or directivity is achieved by simple antenna elements acting together;In multipath signal reception, antenna array is able to provide higher directive gain andArray signal processing is enabled and enhanced based on demand.…”