Abstract
Ad hoc networks have drawn considerable attentions of researchers for the last few years. Various applications of ad hoc networks have been reported in the literatures including disaster management, battle field, environmental management, healthcare, and smart grid. Ad hoc networks have some limitations namely short operating life, unreliability, scalability, delay, high interference, and scarce resources. In order to overcome these limitations, numerous researches have been carried out. Smart antenna integration is one of them. It has been shown in the literatures that smart antenna can improve network’s capacity, increase network lifetime, reduce delay, and improve scalability by directing antenna radiation pattern in a desired direction. But, producing a desired antenna radiation pattern is not a simple task for resource constraint ad hoc networks. A careful selection of beam forming algorithm is required. In this paper we show that smart antenna system, consisting of circular microstrip antennas and arranged in a linear arrangement, is the most suitable choice for ad hoc network. We compare a number of smart antenna algorithms in this paper under different noisy conditions. We show that the Least Square Constant Modulus (LSCM) and Least Constant Modulus (LCM) algorithms outperform other algorithms in terms of directivity and minimized side lobes.
Highlights
Recent developments in electronic devices like laptop computers, personal digital assistant (PDA), pagers, and cellular phones have become portable and “smart”
In this work we investigate a number of smart antenna algorithms namely Least Mean Square (LMS), Sample Matrix Inversion (SMI), Recursive Least Square (RLS), Constant Modulus (CM), Least Square Constant Modulus (LSCM), Conjugate Gradient Method (CGM), and Spreading Sequence Array Weights (SSAW)
Since mobile nodes in ad hoc network have very limited processing power, smart antenna should be very simple in architecture
Summary
Recent developments in electronic devices like laptop computers, personal digital assistant (PDA), pagers, and cellular phones have become portable and “smart” now. Ad hoc network consists of a number of mobile nodes. Smart antenna enables mobile node to radiate power in a specified direction. Smart antenna allows a mobile node to adjust its transmission power to a required minimum level and improves the network life-time. In this paper we investigate effective and efficient smart antenna design strategy for mobile ad hoc networks. M. Tarique 22 we investigate a number of smart antenna algorithms in order to select an optimum algorithm for mobile ad hoc networks. The performances of rectangular and circular microstrip antennas have been investigated and compared in the same section.
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