Abstract

With the advent of complex Digital Signal Processors, the field of Signal Processing has been gaining momentum. This has come as a boon to the field of ‘Smart Antennas’. The increase in demand for mobile communication services without an increase in the RF spectrum allocation has motivated the need for new techniques to improve spectrum utilization. Smart antenna (Adaptive antenna) is one of the approaches that show real promise for increasing spectrum efficiency [3]. Smart antennas work in two phases, Direction of arrival (DOA) and Beam forming [1,4,5]. In this paper we analyze the results of using lens in a smart antenna system for various number of signals, radii of the lens, directions of arrival of signals using the DOA and beam forming algorithms. Lens provides several types of improvements in terms of array gain, interference reduction, and spatial filtering, which have a cumulative effect of improving signal to noise ratio [6]. As a result better quality of service is achieved when compared to reflector antenna [2].

Keywords: Beam forming, Smart Antenna, DOA, Beam forming, Dielectric Lens

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