Smart antenna system analysis, integration and performance for mobile ad-hoc networks (MANETs)

Abstract

This paper focuses on the interaction and integration of several critical components of a Mobile Ad-Hoc Network (MANET) using smart antenna systems. A MANET is a wireless network where the communicating nodes are mobile and the network topology is continuously changing. One of the central motivations for this work comes from the observed dependence of the overall network throughput on the design of the adaptive antenna system and its underlying signal processing algorithms. In fact, a major objective of this work is to study and document the overall efficiency of the network in terms of the antenna pattern and the length of the training sequence used by the beamforming algorithms. This study also considers in sufficient detail problems dealing with the choice of direction of arrival algorithm and the performance of the adaptive beamformer in the presence of antenna coupling effects. Furthermore, the paper presents strategies and algorithms to combat the effects of fading channels on the overall system.

Tone based MAC protocol for use with adaptive array antennas

“…Among the papers that have studied the application of adaptive antenna arrays in ad hoc networking are [3], [4], [5]. [5] provides a high-level discussion of some promising research areas when using adaptive antenna arrays in ad hoc networks.…”

“…They however do not provide any results. [3] examines the interaction and integration of several critical components of adaptive antenna arrays for use in ad hoc networks. This paper focuses on the design of these antennas for mobile devices with operating frequency of 20Ghz.…”

“…On the other hand, if it wishes to send data, it will beamform in the direction of the receiver. It chooses a random number between [0..CW] and sets the CW (Contention Window) timer 3 . When the CW timer expires, it sends a sender-tone in the direction of the receiver and moves to the ACK Wait state.…”

Designing Interference based Routing Metric In Wireless Mesh Network and Comparison According to Various Tunable Parameters

“…When the network topology changes, the nodes propagate update messages throughout the network to preserve consistent and up-to-date routing information about the whole network. These routing protocols vary in the method by which packets are forwarded along routes [1,7,8,9,10,11,12,4,5,3,13,6,2,14,15].…”

A Novel Method of Beamforming to Improve the Space Diversity

“…Now these systems demand more services due to in the constant increase in the number of users, and as a possible solution to this problem several studies have focused on a new mechanism known as division multiple access space (Space Division Multiple Access, SDMA) [1][2][3][4][5][6][7] which provides the ability to reuse resources (frequency bands, slots time, codes or any combination) simultaneously within the same service area. The goal of this paper is to propose a method to optimize the space diversity of a linear antenna array.…”